A Miniaturized Photodetector with Differential Amplification Function
A technology of photodetector and differential amplifier circuit, which is applied in the direction of photometry, photometry, optical radiation measurement, etc. using electrical radiation detector, can solve the problem of insufficient load capacity of photodetector, size limitation of photodetector, The photodiode impedance is large and other problems, so as to reduce the number of circuit components, avoid excessive noise amplification, and simplify the circuit.
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[0033] Such as figure 1 and figure 2 As shown, a miniaturized photodetector with a differential amplification function disclosed in this embodiment includes two parts: a photodetection module and a differential amplification circuit module.
[0034] The front-end photodetection module is mainly responsible for collecting the outgoing light signal of the laser to be tested. The photoelectric detection module includes two sets of photodiodes and two sets of protective shells. Wherein, the first set of photodiodes and protective casing includes: a first double-pin photodiode 1-a, a first detector protective casing 2-a, and a first SMA signal line terminal 3-a. The second set of photodiodes and protective shells includes: a second double-pin photodiode 1-b, a second detector protective shell 2-b, and a second SMA signal line terminal 3-b.
[0035] The differential amplification circuit module at the back end can perform differential amplification processing on the detection si...
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