초록 ▼

An optical transmitter-receiver system is provided which is particularly adapted for use in vehicle guidance, obstacle detection and the like. The system includes a laser diode transmitter including a modulation circuit comprising a bank of transistors that are individually triggered into the alvala

An optical transmitter-receiver system is provided which is particularly adapted for use in vehicle guidance, obstacle detection and the like. The system includes a laser diode transmitter including a modulation circuit comprising a bank of transistors that are individually triggered into the alvalanche mode so that energy stored by a capacitive storage network is discharged into the diode. In accordance with a first receiver embodiment, which includes a range flip-flop controlled by a threshold comparator, an analog voltage proportional to range is produced. In a second receiver embodiment, the receiver responds to targets within a prescribed zone determined by an analog gated amplifier.

대표청구항 ▼

A transmitter-receiver system comprising a laser diode transmitter and a range detecting receiver for receiving the output of said transmitter, said transmitter comprising a laser diode and a modulating circuit for said diode comprising a bank of avalanche transistors having a common output line, a

A transmitter-receiver system comprising a laser diode transmitter and a range detecting receiver for receiving the output of said transmitter, said transmitter comprising a laser diode and a modulating circuit for said diode comprising a bank of avalanche transistors having a common output line, a capacitive storage network, means for sequentially triggering said transistors into the avalanche made so as to deliver energy from said storage network to said diode and means for directly connecting said common output line of said bank of transistors to said laser diode, and said receiver comprising signal converting means for converting the received transmitter output into an electrical input signal in accordance therewith; automatic gain control amplifier means connected to receive said input signal; comparator means for comparing the output of said amplifier means with a threshold reference; bistable multivibrator means which produces a predetermined output when the output of said amplifier means exceeds said threshold reference, said bistable multivibrator means being preset by a control signal derived from a transmitter synchronizing signal; and a duty-cycle detector connected to said bistable multivibrator means for converting the output thereof into a corresponding d-c range signal.