Temperature compensated APD detector bias and transimpedance amp

Details Temperature compensated APD detector bias and transimpedance amp Temperature compensated APD detector bias and transimpedance amp

1995-06-02

1997-12-09

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 52, 361115, H02H 700

Patent

active

056966571

ABSTRACT:
Laser range finder circuitry including an avalanche photodiode detector, a capacitor for storing a detector bias voltage, and a transimpedance amplifier for amplifying the detector signal. The capacitor is charged in response to a first control signal by a circuit employing first and second field effect transistors and is discharged in response to a second control signal by a circuit employing a third field effect transistor. An overload protection circuit including a single diode is provided to accommodate excessive charge created by backscatter upon initial laser firing. A temperature sensor is further provided to develop a temperature signal which may be monitored to adjust the detector bias voltage and other parameters so as to permit use of an associated laser range finder over a wide range of temperatures.

REFERENCES:
patent: 4001614 (1977-01-01), Dahlinger
patent: 4415803 (1983-11-01), Muoi
patent: 4464048 (1984-08-01), Farlow
patent: 4518255 (1985-05-01), Zuleeg
patent: 4882482 (1989-11-01), Smith et al.

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