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Solutions Search - Timing & Frequency Solutions

LTC6258 Low Power Squarewave - Sinewave Oscillator

Aug 30th 2017
A low power sine wave generator can be derived by driving a square wave into the bandpass filter. A complete schematic is shown in Figure 4a. The LTC6992-1 easily configures as a 50% duty cycle 10kHz square wave, and can drive the relatively benign loading seen in the bandpass filter. Figures 4b and 4c show the LTC6992-1 output ...

Circuit LTspice 

 

LTC2956 Wake-Up Timer with Pushbutton Control

Mar 19th 2015
The LTC®2956 is a micropower, wide input voltage range, configurable wake-up timer with pushbutton control. It periodically wakes up and turns on a connected system to perform tasks like monitoring temperature or capturing images. After completing the task, the LTC2956 turns the system off to conserve power. ...

Circuit 

 

LTC2956 Micropower Time-Lapse Photography Intervalometer

Mar 19th 2015
The LTC®2956 is a micropower, wide input voltage range, configurable wake-up timer with pushbutton control. It periodically wakes up and turns on a connected system to perform tasks like monitoring temperature or capturing images. After completing the task, the LTC2956 turns the system off to conserve power. ...

Circuit 

 

LTC2956 Micropower, Reverse Battery Protected Pushbutton Controller and Sleep Timer with Hot-Swap Controller

Mar 19th 2015
The LTC®2956 is a micropower, wide input voltage range, configurable wake-up timer with pushbutton control. It periodically wakes up and turns on a connected system to perform tasks like monitoring temperature or capturing images. After completing the task, the LTC2956 turns the system off to conserve power. ...

Circuit 

 

LTC2956 Low IQ Timer with 10% Duty Cycle

Mar 19th 2015
The LTC®2956 is a micropower, wide input voltage range, configurable wake-up timer with pushbutton control. It periodically wakes up and turns on a connected system to perform tasks like monitoring temperature or capturing images. After completing the task, the LTC2956 turns the system off to conserve power. ...

Circuit 

 

LTC6752 Pulse Stretcher Circuit/Monostable Multivibrator

Dec 16th 2014
For detecting short pulses from a single sensor, a pulse stretcher is often required. The circuit of the figure above acts as a one-shot, stretching the width of an incoming pulse to a consistent ~100ns. The circuit works as follows: Comparator U1 functions as a threshold detector, and Comparator U2 functions as a one-shot. ...

Circuit LTspice 

 

LTC6752 200MHz Clock Restoration/Level Shifting

Dec 16th 2014
High speed comparators are often used in digital systems to recover distorted clock waveforms. The separate input/ output supplies feature of the LTC6752-2 allows it to be used in applications where signals need to be shifted from one voltage domain to another. The circuit above can perform both recovery and level translation ...

Circuit 

 

LTC6993-1 Staircase Generator with Reset

Aug 7th 2014
The LTC®6993 is a monostable multivibrator (also known as a “one-shot” pulse generator) with a programmable pulse width of 1μs to 33.6 seconds. The LTC6993 is part of the TimerBlox® family of versatile silicon timing devices. ...

Circuit LTspice 

 

LTC6992-1 1MHz Pulse Width Modulator

Aug 7th 2014
The LTC®6992 is a silicon oscillator with an easy-to-use analog voltage-controlled pulse width modulation (PWM) capability. The LTC6992 is part of the TimerBlox® family of versatile silicon timing devices. ...

Circuit LTspice 

 

LTC6991 Intervalometer for Time-Lapse Photography

Aug 7th 2014
The LTC®6991 is a silicon oscillator with a programmable period range of 1.024ms to 9.54 hours (29.1μHz to 977Hz), specifically intended for long duration timing events. The LTC6991 is part of the TimerBlox® family of versatile silicon timing devices. ...

Circuit LTspice 

 

LTC6993-1 Consecutive Test Sequencer

Aug 7th 2014
The LTC®6993 is a monostable multivibrator (also known as a “one-shot” pulse generator) with a programmable pulse width of 1μs to 33.6 seconds. The LTC6993 is part of the TimerBlox® family of versatile silicon timing devices. ...

Circuit LTspice 

 

LTC6994-1 Delayed One-Shot

Aug 7th 2014
The LTC®6994 is a programmable delay block with a range of 1μs to 33.6 seconds. The LTC6994 is part of the TimerBlox® family of versatile silicon timing devices. ...

Circuit LTspice 

 

Halve The Jitter With The LTC6957 Filters While Buffering 10MHz

Michel Azarian - Product Marketing Engineer Aug 2nd 2013
You’re looking for a low additive phase noise (jitter) buffer to distribute the 10MHz sinewave source in your system as a reference clock. After looking at several datasheets from different vendors, you realize that there isn’t much performance information given at this relatively low frequency. Most high-performance ...

Blog Post 

 

Debugging the LTC6946: Getting the PLL to Lock

Michel Azarian - Product Marketing Engineer Mar 21st 2013
The DC1705 and the PLLWizard software provide a complete evaluation system for the LTC6946 that makes it easy to determine how the part will behave in your system. However, a common problem can occur when designing any PLL system - what if the PLL is not locking to the proper frequency?  In cases where the LTC6946 RF output ...

Blog Post 

 

Active Low Power-On Reset Timer (1s POR)

Feb 25th 2013
The LTC6995 provides a simple, accurate low frequency clock uniquely configurable for long duration power-on reset and watchdog timer applications. In this example the LTC6995 combines an programmable oscillator with precision circuitry and logic to achieve an accurate 1 second POR. This resistor-settable POR can be programmed ...

Circuit LTspice 

 

LTC6945 Wideband Point-to-Point Radio Local Oscillator

Dec 13th 2011
The LTC6945 is a high performance, low noise, 6GHz phase locked loop (PLL), including a reference divider, phase frequency detector (PFD) with phase-lock indicator, charge pump, integer feedback divider and VCO output divider. The part features a buffered, programmable VCO output divider with a range of 1 through 6. The differential, ...

Circuit 

 

Low Phase Noise Frequency Synthesizers for RF Applications

Doug LaPorte - Design Manager Sep 19th 2011
In modern RF communication systems, signal integrity is of prime importance. To meet the system requirements, amplifiers, mixers and modulators must have a low noise figure and low distortion products. Additionally, as system designers work to squeeze increasingly more data into the available bandwidth, low phase noise signal ...

Blog Post Video 

 

On-Time Programmable Pulsed Solenoid Driver

Aug 6th 2010
The LTC6993 is a monostable multivibrator (also known as a “one-shot” pulse generator) with a programmable pulse width of 1μs to 33.6 seconds. The LTC6993 is part of the TimerBlox family of versatile silicon timing devices. A single resistor, RSET, programs an internal master oscillator frequency, setting the LTC6993’s ...

Circuit 

 

Pulse Staircase Ramp Generator

Aug 6th 2010
This design highlights the use of the LTC6993-2 and LT1490 to generate a pulse staircase ramp that is re-triggerable. The pulse staircase ramp output is generated by the LT1490 dual op amp converts pulse frequency-to-voltage and generates a staircase output. The LTC6993-2 is then configured to reset the staircase.The LTC6993-2 ...

Circuit LTspice 

 

Consecutive Test Sequencer

Aug 6th 2010
This circuit highlights the use of LTC6993 Monostable Pulse Generator and LTC6994 Delay Block/Debouncer in a consecutive test sequencer application. This example is configured to provide a one second duration sequential test pulses after an initial delay. The initial delay is provided by the LTC6994 and the consecutive one second ...

Circuit LTspice 

 

Crossover Gate—Break-Before-Make Interval Timer

Aug 6th 2010
The LTC6994 is a programmable delay block with a range of 1μs to 33.6 seconds. The LTC6994 is part of the TimerBlox family of versatile silicon timing devices. A single resistor, RSET , programs an internal master oscillator frequency, setting the LTC6994’s time base. The output (OUT) follows the input (IN) after delaying ...

Circuit 

 

Delayed One Shot

Aug 6th 2010
This circuit highlights the use of the LTC6994 Delay Block/ Debouncer and LTC6993 Monostable Pulse Generator in a delayed one-shot application. The LTC6994 is configured to provide a rise time delay of 50ms and the LTC6993 is configured to provide a 10ms one shot. The LTC6994 is a programmable delay block with a range of 1μs ...

Circuit LTspice 

 

8 Second to 8.5 Minute Low Frequency Clock (Intervalometer for Time-Lapse Photography)

Aug 6th 2010
This circuit example highlights the use of the LTC6991 in a intervalometer for time lapse photography. In this example the LTC6991 is configured as a self-resetting circuit and generates a fixed time pulse from 8s to 64s. The LTC6991 is part of the TimerBlox family of versatile silicon timing devices with a programmable period ...

Circuit LTspice 

 

LTC6990 Full Range VCO with Any NDIV Setting (Positive Frequency Control, fMIN to fMAX for VIN = 0V to VSET

May 12th 2010
The LTC®6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator (VCO). The LTC6990 is part of the TimerBlox® family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6990’s internal ...

Circuit 

 

Temperature to Frequency Converter

May 12th 2010
3% Linearity from –20°C (Fout = 20kHz) to 75°C (Fout = 25kHz) The LTC6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator (VCO). The LTC6990 is part of the TimerBlox family of versatile silicon timing devices. ...

Circuit 

 

Voltage Controlled Oscillator with 16:1 Frequency Range

May 12th 2010
The LTC6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator (VCO). The LTC6990 is part of the TimerBlox family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6990’s internal master oscillator ...

Circuit 

 

LTC6990 Isolated Voltage to Frequency Converter. VIN Provided by Isolated Measurement Circuit. 5μs Rise/Fall Time of Isolator Limits fMAX to 60kHz

May 12th 2010
The LTC®6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator (VCO). The LTC6990 is part of the TimerBlox® family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6990’s internal ...

Circuit 

 

Light to Frequency Converter

May 12th 2010
Fout = –1.4kHz per microampere of photo diode current, IPD. The LTC6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator (VCO). The LTC6990 is part of the TimerBlox family of versatile silicon timing devices. A single ...

Circuit 

 

1MHz Pulse Width Modulator

May 12th 2010
This circuit highlights the use of the LTC6992 as a 1MHz Pulse Width Modulator (PWM); converting an analog input into a PWM output. The LTC6992 is part of the TimerBlox family of versatile silicon timing devices and provides an easy-to-use analog voltage-controlled PWM capability. To program the master oscillator frequency ...

Circuit LTspice 

 

Ratiometric Sensor to Pulse Width, Non-Inverting Response

May 12th 2010
The LTC6992 is a silicon oscillator with an easy-to-use analog voltage-controlled pulse width modulation (PWM) capability. The LTC6992 is part of the TimerBlox family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6992’s internal master oscillator frequency. The output frequency is determined ...

Circuit 

 

Motor Speed/Direction Control for Full H-Bridge (Locked Anti-Phase Drive)

May 12th 2010
The LTC6992 is a silicon oscillator with an easy-to-use analog voltage-controlled pulse width modulation (PWM) capability. The LTC6992 is part of the TimerBlox family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6992’s internal master oscillator frequency. The output frequency is determined ...

Circuit 

 

Simple Diode Temperature Sensor With Frequency Output

May 12th 2010
The LTC6992 is a silicon oscillator with an easy-to-use analog voltage-controlled pulse width modulation (PWM) capability. The LTC6992 is part of the TimerBlox family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6992’s internal master oscillator frequency. The output frequency is determined ...

Circuit 

 

Isolated PWM (5% to 95%) Controller

May 12th 2010
The LTC6992 is a silicon oscillator with an easy-to-use analog voltage-controlled pulse width modulation (PWM) capability. The LTC6992 is part of the TimerBlox family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6992’s internal master oscillator frequency. The output frequency is determined ...

Circuit 

 

LT2940 28V Power to Frequency Converter

Nov 30th 2009
In some environments isolation is necessary for safety or noise reasons. The circuit above shows a power-to-frequency converter using the LT2940. The PMON output alternately charges and discharges a film capacitor, C5. When the voltage on C5 charges to the upper threshold on hysteretic comparator LTC1440, its output flips the ...

Circuit 

 

LTC6946-2 Driving a Passive Downconverting Mixer

Oct 27th 2009
The LTC6946 is a high performance, low noise, 5.7GHz phase-locked loop (PLL) with a fully integrated VCO, including a reference divider, phase-frequency detector (PFD) with phase-lock indicator, ultralow noise charge pump, integer feedback divider, and VCO output divider. The charge pump contains selectable high and low voltage ...

Circuit 

 

Wideband Receiver

Nov 13th 2008
The LTC5551 is a 2.5V to 3.6V mixer optimized for RF downconverting mixer applications that require very high dynamic range. The LTC5551 covers the 300MHz to 3.5GHz RF Frequency range with LO frequency range of 200MHz to 3.5GHz. The LTC5551 provides very high IIP3 and P1dB with low power consumption. A typical application is ...

Circuit 

 

0.01% Voltage To Frequency Converter

Sep 3rd 2004
The LTC6943 is a monolithic, charge-balanced, dual switched capacitor instrumentation building block. A pair of switches alternately connects an external capacitor to an input voltage and then connects the charged capacitor across an output port. The internal switches have a break-before-make action. An internal clock is provided ...

Circuit 

 

LT1715 Rail-to-Rail 1MHz Pulse Width Modulator

Jun 1st 2001
In applications where a high frequency variable PWM generator is needed, the LT1715 provides a small and simple solution, as shown in the circuit of Figure 10. The top comparator, U1A, acts as a ramp generator. Biasing resistors R1 and R2 and a 7:1 positive feedback ratio through R3 set the positive input to approximately 2.5V±250mV. ...

Circuit LTspice 

 

Temperature To Frequency Converter

Jan 30th 2001
This circuit directly converts temperature to digital data. In this case, a thermistor sensor biases the RSET pin. The LTC1799 frequency output is predictable, although nonlinear. The inverse RSET vs frequency relationship combines with the thermistor’s nonlinear characteristic to give Figure 8’s data. The curve is nonlinear, ...

Circuit 

 

Clock Tunable, Filter Based Sine Wave Generator

Nov 13th 2000
A feedback loop enclosed resonator can be made to oscillate. This circuit’s sine wave generator takes advantage of this and eliminates the need for an amplitude control loop. This circuit, a mildly modified form of the Regan resonant bandpass loop, is clock tunable and produces sine and cosine outputs. ...

Circuit 

 

LT1721 Pulse Generator Has 0ns to 10ns Width, 520ps Transitions

Oct 13th 1999
It is sometimes desirable to produce extremely short width pulses in response to an input trigger. Such a predictable, programmable short time interval generator has broad use in fast pulse circuitry, particularly in sampling applications. This circuit, built around a quad high speed comparator and a fast gate, has a settable ...

Circuit LTspice 

 

LT1007/LT1037 Ultrapure 1kHz Sine Wave Generator

Jan 1st 1998
A lamp provides amplitude stability while the very low noise amplifier creates a pure sine wave signal. The R an C values set the oscillator frequency and the feedback resistor sets the lamp current and output amplitude. ...

Circuit LTspice 

 

Micropower 1MHz V/F Converter

Jan 1st 1998
A 0V to 5V input produces a 0MHz to 1MHz output frequency. ...

Circuit 

 

13uA, 0kHz to 10kHz Voltage to Frequency Converter

Jan 22nd 1997
This circuit converts a 0V to 2.5V input signal to a 0kHz to 10kHz output frequency. The supply current of the circuit is only 6.2uA quiescent and 13.3uA at f=10kHz. The linearity of the circuit is +/-0.03%. PSRR is 10ppm/V and temperature drift is 250ppm/C. ...

Circuit 

 

Counter Driven, Sine Encoded Memory Produces 0.75% Distortion Sinewave via D/A Converter

Jan 15th 1996
This circuit generates a variable frequency sine wave by continuously clocking a sine coded lookup table memory. The memory’s state is converted to an analog output by a DAC. A strength of this technique is its rapid, high fidelity response to frequency and amplitude change commands. ...

Circuit 

 

Low Distortion, Crystal Stabilized Oscillator

Feb 14th 1994
Variation on the classic sine-wave Wien-bridge oscillator. The op amp to the left forces a symmetric signal to develop across the bridge, while the negative tempco of the lamp filament stabilizes the amplitude of oscillation by the right-side section. ...

Circuit 

 

5V Powered, Quartz-Stabilized 10kHz Voltage to Frequency Converter has 0.0015% Linearity and 8ppm/°C Temperature Coefficient

Nov 16th 1992
Almost all precision voltage-to-frequency converters utilize charge pump based feedback for stability. These schemes rely on a capacitor for stability. A great deal of effort towards this approach has resulted in high performance V to F converters. Obtaining temperature coefficients below 100ppm/°C requires careful attention ...

Circuit 

 

Balanced Frequency Converter (Suitable for Frequencies up to 50kHz)

Nov 16th 1992
This circuit takes advantage of aliasing that occurs in any time sampled system. The output signal frequency is the difference in frequency between the input signal and the switch sampling rate. A 24KHz input signal sampled at 25KHz will be converted to a 1KHz output signal. In addition by using the LTC1992 fully differential ...

Circuit 

 

1Hz to 100MHz Voltage to Frequency Converter Has 160dB Dynamic Range, Runs From 5V Supply

Jan 1st 1990
This circuit achieves a wider dynamic range and higher output frequency than any commercially available voltage to frequency (V→F) converter. Its 100MHz full scale output (10% over range to 110MHz is provided) is at least ten times faster than available units. The circuit’s 160dB dynamic range (8 decades) allows continuous ...

Circuit 

 

Exponential Voltage-to-Frequency Converter for Music Synthesizers

Jan 1st 1987
Logarithmic characteristic of BJT is used to provide an exponential control effect on V/F function. By using a multiple transistor array, a thermal stabilization circuit assures a constant operating point for the log function. ...

Circuit 

 

Bipolar Input (AC) V/F Converter

Jan 1st 1987
Input integrator uses precision full-wave rectifier for an absolute-value integration charge. Since not ground referenced, the integration ramp is sensed by a diff amp structure that drives the V/F output comparator. A simple comparison forms a sign bit. ...

Circuit 

 

LTC6990/LTC1440/LTC1059 Quadrature Sine Wave Oscillator

Jan 1st 1987
This circuit provides a voltage controlled frequency range from 2Hz to 18kHz with 1Vp-p constant putput amplitude. The LTC6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator (VCO). The LTC6990 is part of the TimerBlox ...

Circuit 

 

1Hz to 10kHz Voltage to Frequency Converter

Jan 1st 1987
JFET inputs with anti phase-reversal circuitry allow the LTC1055/56 to be used as a precision, ultra-high impedance comparator. The precision provides for very high linearity of the V/F generation while the high speed allows a large frequency range of operation. ...

Circuit 

 

Temperature-to-Frequency Converter

Jan 1st 1987
Precision oscillator structure uses SCR effect to discharge integration capacitor. A temperature dependent device (LM134) effects the integrator trip point to form a variable interval. An output transistor detects the reset action and forms a logic pulse. ...

Circuit 

 

LT1028/LT1055/LT1004 Super Low Distortion Variable Sine Wave Oscillator

Nov 1st 1983
The LT1028(gain of –1 stable)/LT1128(gain of +1 stable) achieve a new standard of excellence in noise performance with 0.85nV/rtHz 1kHz noise, 1.0nV/rtHz 10Hz noise. This ultralow noise is combined with excellent high speed specifications (gain-bandwidth product is 75MHz for LT1028, 20MHz for LT1128), distortion-free output, ...

Circuit LTspice