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Solutions Search - Video Functions

Super-Simple Coax to Twisted-Pair Adapter

Oct 30th 2007
Launching a baseband camera signal into twisted pair is a relatively simple matter of building a differential driver such as shown in this circuit. In this realization one LT6652 is used to create a gain of +1 and another is used to make a gain of –1. Each output is series terminated in half the line impedance to provide ...

Circuit 

 

400MHz, 5V Single Supply Video Driver (AC Coupled)

Sep 22nd 2006
The LT6557 400MHz triple video driver is specifically designed to operate in 5V single supply AC-coupled applications as shown. The input biasing circuitry is contained on-chip for minimal external component count. A single resistor programs the biasing level of all three channels. ...

Circuit 

 

Low Part Count UXGA-Resolution Cable Driver on 5V Supply

Sep 22nd 2006
LT6557 UXGA-Resolution Cable Driver circuit operating from a single 5V Supply. This circuit has a 400MHz large signal bandwidth. Single input biasing system resistor programs eliminates then usual input divider resistors. High resolution HD quality circuit, one of three shown. ...

Circuit 

 

HD Video Cable Driver Using Economical LT6559

Sep 22nd 2006
Single supply 5V HD Video Cable Driver with two resistors setting common voltage on capacitive coupled input. Two 270pF takes care of 10MHz filtering. This circuit depicts one of three channels. ...

Circuit 

 

Input Video Selector and ADC Driver for Multimedia Display System

Aug 19th 2005
Input selection is readily implemented with the LT6556 on 5V, supporting all video resolutions including UXGA by virtue of its 750MHz bandwidth and 6.5ns settling time. For the AC-coupling shown, the outputs swing approximately ±0.7V about the mid-supply level, within an available range of 2.6VP-P. ...

Circuit 

 

Buffered Input Multiplexer/ADC Driver

Aug 19th 2005
The LT6556 is a complete 3-channel wideband video 2:1 multiplexer with internally set gain of one. This part is ideal as an input port receiver for HD component or high-resolution RGB video products. The basic application circuit is shown in Figure 35, with 1kΩ output loads to represent subsequent processing circuitry (the ...

Circuit 

 

4:1 RGB Multiplexer

Apr 29th 2005
Since the LT6555 includes an enable control line, it is possible to extend the selection range of the multiplexer. This circuit shows two LT6555 devices in a configuration that provides 4:1 selection of RGB sources to an RGB output port (these could also be YPBPR signals as well, depending on the source). To avoid frequency ...

Circuit 

 

Three Channel Integrated Multiplexer and Line Driver

Apr 29th 2005
The LT6555 is a complete 3-channel wideband video 2:1 multiplexer with internally set gain of two. This part is ideal as an output port driver for HD component or high-resolution RGB video products. The basic application circuit is shown here with terminations shown on all ports, though in many applications the input loading ...

Circuit 

 

Three Channel, Single Supply Video Line Driver (AC Coupled)

Nov 21st 2003
The LT6553 ultra-high-speed triple video driver configured for single-supply AC-coupled operation. This part is ideal for HD or high-resolution workstation applications that demand high bandwidth and fast settling. The amplifier gains are factory-set to two by internal resistors ...

Circuit 

 

Triple Video Line Driver (DC Coupled)

Nov 21st 2003
In DC-coupled systems, the video swings are fixed in relation to the supplies used, so back-terminated cable drivers need only provide 2V of output range when optimally biased. In most cases, this permits operation on lower power supply potential(s) than with AC-coupling (unclamped mode). Generally DC-coupled circuits use split ...

Circuit 

 

YPBPR to RGB Video Converter

Jul 18th 2003
This circuit shows LT6552 amplifiers connected to convert component video (YPBPR) to RGB. This circuit maps the sync on Y to all three outputs, so if a separate sync connection is needed by the destination device (e.g. studio monitor), any of the R, G, or B channels may be simply looped-through the sync input (i.e. set ZIN ...

Circuit 

 

All-In-One Twisted-Pair Video Line Receiver, Cable Equalizer, and Display Driver

Jul 18th 2003
Twisted pair exhibits a rolloff characteristic that requires equalization to correct for, so this circuit shows a suitable feedback network that accomplishes this. Here again the outstanding common mode rejection of the LT6552 is harnessed to eliminate stray pickup that occurs in long cable runs. ...

Circuit 

 

Cable Sense Amplifier for Loop Through Connections with DC Adjust

Jul 18th 2003
This circuit shows a means of providing a multidrop tap amplifier using the differential input LT6552. This circuit taps the cable (loop-through configuration) at a high impedance and then amplifies the signal for transmission to a standard 75Ω video load (a display monitor for example). The looped-through signal would continue ...

Circuit 

 

S-Video Splitter (AC Coupled)

Jun 27th 2002
This figure shows an LT6551 quad amplifier driving two sets of “S-video” (Y/C format) output cables from a single Y/C source. Internal gain-setting resistors within the LT6551 reduce part-count. ...

Circuit 

 

LT6550 RGB to YPBPR Component-Video Conversion

Jun 27th 2002
Figure 15 shows a method of generating the standard definition YPBPR signals from an RGB source using a pair of LT6550 triple amplifiers. It should be noted that to ensure Y includes a correct sync, correct syncs should be present at all three inputs or else added directly at the Y output (gated 8.5mA current sink or 350Ω ...

Circuit LTspice 

 

3.3V Single Supply LT6551 RGB Plus SYNC Cable Driver (DC Coupled)

Jun 27th 2002
The LT6551 drives four cables and operating from a single 3.3V supply. The inputs need to have signals centered at 0.83V for best linearity. This application would be typical of standard-definition studio-environment signal distribution equipment (RGBS format). ...

Circuit 

 

High Speed RGB to YPBPR Converter

Jan 19th 2000
An LT6559 and an LT1395 can also be used to map RGB signals into YPBPR “component” video. The LT1395 performs a weighted inverting addition of all three inputs. The LT1395 output includes an amplification of the R input by –324/1.07k = –0.3. The amplifi cation of the G input is by –324/549 = –0.59. Finally, the ...

Circuit 

 

2:1 RGB Multiplexer and Cable Driver

Oct 14th 1998
The LT1675 is also an integrated 3-channel 2:1 multiplexer that includes gain of two for cable-driving applications. The basic configuration is shown in Figure 34. A single channel version for composite video applications is available as an LT1675-1. ...

Circuit 

 

RGB Video Inverter

Oct 14th 1998
This circuit is useful for viewing photographic negatives on video. A single channel can be used for composite or monochrome video. The inverting amplifier stages are only switched in during active video so the blanking, sync and color burst (if present) are not disturbed. To prevent video from swinging negative, a voltage ...

Circuit 

 

Two-Input Video Fader

Feb 11th 1994
In some cases it is desirable to adjust amplitude of a video waveform, or cross-fade between two different video sources. This circuit provides a simple means of accomplishing this. The 0V to 2.5V control voltage provides a steering command to a pair of amplifier input sections; at each extreme, one section or the other takes ...

Circuit 

 

Gamma Correction Amplifier

Mar 23rd 1992
This circuit shows a schematic of a typical circuit which can correct for positive or negative gamma. This is an upgrade of a classic circuit which uses diodes as the nonlinear elements. The temperature variation of the diode junction voltages is compensated to the fi rst order by the balanced arrangement. LT1227s and LT1229s ...

Circuit 

 

DC Stabilized 1000uV/msec Op Amp

Nov 1st 1983
Adding a discrete output stage provides full control of the circuit operating currents thereby obtaining very fast ac signal response. The LT1001 is used to adjust the output dc offset to a very low value, uVs, not typical for very high speed amplifier designs. ...

Circuit