Current type terahertz pyroelectricity detector reading circuit
A pyroelectric detector and readout circuit technology, applied in the field of terahertz detection and imaging, can solve problems such as weak current, achieve low stability, eliminate power frequency signal interference, and filter power pulsation interference
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[0025] The present invention will be further introduced below in conjunction with the accompanying drawings and embodiments.
[0026] A current-mode terahertz pyroelectric detector readout circuit, such as figure 1 As shown, it includes a current-voltage converter, a 50Hz trap circuit, a first-order low-pass filter amplifier circuit and a potential raising module. Among them, the signal output by the terahertz pyroelectric detector is input into the current-voltage converter, which is used to convert the current signal into a voltage signal; the signal output by the current-voltage converter is input into the 50Hz trap circuit, which is used to eliminate power frequency interference; 50Hz The signal output by the notch circuit is input into the first-order low-pass filter amplifier circuit for further signal amplification; the signal output by the first-order low-pass filter amplifier circuit is then input into the potential raising module, which is used to raise the voltage s...
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