| 摘要 |
The testing circuit has a low-ohmic resistor (R1) connected between the laser diode supply point and earth during the test mode, with a feedback voltage amplifier (T1,R2) connected in parallel with the low-ohmic resistor, its output coupled to the positive input of a transimpedance amplifier (TIV) within the laser regulation circuit. The positive input of the transimpedance amplifier is coupled via a resistor (R3) and a parallel capacitor (C2) to a reference potential, the laser diode supply point coupled to an oscilloscope via a further resistor (R5).
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