1. Skip to navigation
  2. Skip to content
  3. Skip to sidebar

Solutions Search - LT1057 - Dual and Quad, JFET Input Precision High Speed Op Amps

100dB Range Logarithmic Photodiode Amplifier

Feb 14th 1994
The photodiode current is processed by a form of trans-impedance amplifier (TIA) that has a logarithmic I to V characteristic. The Vbe of the logging transistor is scaled and offset to properly represent the desired dynamic range. To prevent temperature variation from affecting the accuracy, another loop is used as a stabilized ...

Circuit 

 

Analog Divider

Feb 14th 1994
The input section forms a precision charge balancing action whereby the capacitor switching rate depends on the ratio of A/B. The output section, driven by the same switching frequency, forms a precision F/V conversion to provide the A/B output signal. ...

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