Low-Noise Readout Circuits with a Response Time Acceleration Technique

摘要

A low noise high-gain readout circuit for high output impedance sensors with a response time acceleration technique is presented. First a circuit analysis is done to determine the condition for designing a low noise readout circuit, and then the readout circuit is optimized to reduce the total input referred noise. If the sensor output has high impedance, the circuit response time is large to achieve the low noise requirement. A new technique for response time acceleration is presented making the circuit response time faster white keeping the noise level unaffected.