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Circuits Sensor Interface & Bias Light Sensors & Photodiodes Photodiode Interface & Transimpedance Amps
Circuits Signal Conditioning Operational Amplifiers (Op Amps) High Speed Amplifiers

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Stepped Gain Photodiode Amplifier

View Full Size Image View Original LT Journal Stepped Gain Photodiode Amplifier

At low signal levels, the circuit has a high 100kΩ transimpedance gain, but at high signal levels the circuit automatically and smoothly changes to a low 3.1kΩ gain. The beneit of a stepped gain approach is that it maximizes dynamic range.



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