Rangefinder and digital single shot circuit

Details Rangefinder and digital single shot circuit Rangefinder and digital single shot circuit

1977-09-27

1979-07-03

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

307273, 307276, 307232, 307234, 328207, 343 13R, G01C 308, H03K 330, H03K 310

Patent

active

041598733

ABSTRACT:
This invention is an improved ranging system including an improved digital single shot circuit that has a resettable shift register therein so that a signal representative of the last target return occurring at any point of a predetermined range interval will be provided to the timing counter of the system. The digital single shot circuit includes a flip flop responsive to the first trigger pulse during the predetermined range interval, resetting the shift register so that, when the output pulse from the shift register representing the last target return is applied to the timing counter, it will terminate a fixed number of clock edges after the last trigger pulse determined by the number of stages of the shift register. The fixed delay in terminating the output of the shift register may represent the preset time of the readout counter.

REFERENCES:
patent: 3545861 (1970-12-01), Farnsworth et al.
patent: 3576496 (1971-04-01), Garagnon
patent: 3666367 (1972-05-01), Farnsworth et al.
patent: 3721906 (1973-03-01), Geesen et al.
patent: 3768026 (1973-10-01), Pezzutti
patent: 3790821 (1974-02-01), Adamson
patent: 3853402 (1974-12-01), Nichols
patent: 3951549 (1976-04-01), Fowler et al.

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