Laser driving open circuit detection method and detection circuit
A technology of open circuit detection and driving circuit, which is applied in the direction of measuring electrical variables, measuring current/voltage, instruments, etc., can solve the problems of consumption voltage margin, energy consumption, and affecting the range of driving current performance, etc., and achieves an easy-to-implement and simple-structured Effect
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[0037] Such as figure 2 Shown is a laser driver circuit. The drive circuit includes a first switch Q1 and a second transistor Q2 capable of forming a differential circuit, and the control terminals of the first transistor Q1 and the second transistor Q2 are respectively connected to the first input terminal and the second transistor of the differential circuit. Two input terminals, one end of the first triode is connected to the output end of the first constant current source Is1 after being connected to the load ZL, and the other end of the first triode Q1 is connected to the second constant current source Is1 after being connected to the resistor R1 The input end of the source Is2, one end of the second triode Q1 is connected to the output end of the first constant current source Is1 through the connection resistor Rterm, and the other end of the second transistor Q2 is connected to the first constant current source Is1 through the connection resistor R2. The input end of ...
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