High-precision weak signal tester and high-precision weak signal test method
A weak signal, tester technology, applied in the parts, instruments, measuring electricity and other directions of electrical measuring instruments, can solve the problems of low detection accuracy, cumbersome detection methods, and expensive instruments, and achieve low noise, low price, and easy operation. simple effect
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[0029] This embodiment discloses a high-precision weak signal tester including a front current-voltage conversion circuit module 101, a first-stage amplification circuit module 102, a voltage following circuit module 103, a second-stage amplification and low-pass filter circuit module 104, a signal Inverting amplifier circuit module 105 and protection circuit module 106;
[0030] The front current-voltage conversion module 101 includes a high impedance amplifier U g1 , the first resistor R 1 , the second resistor R 2 , the third resistor R 3 and the first capacitor C 1 . High impedance amplifier U g1 It is an electrometer amplifier with femtoampere input bias current, high input impedance, low offset voltage, and low temperature drift. The first resistor R 1 , the second resistor R 2 , the third resistance R 3 As a metal film resistor with high precision, the first capacitor C 1 Ceramic capacitors are used to reduce the influence of noise on the signal. The first re...
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Abstract
Description
Claims
Application Information
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