Electrical pulse counters – pulse dividers – or shift registers: c – Counting or dividing in incremental steps – Beam type tube
Patent
1991-01-25
1992-07-07
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Counting or dividing in incremental steps
Beam type tube
377 43, 324 83R, 328 55, G01R 2508
Patent
active
051286246
ABSTRACT:
A pulse phase difference encoding circuit provides a digital signal indicating a phase difference between a first input pulse and a second input pulse. The first input pulse is provided to and circulated in a ring signal delay circuit having a plurality of signal delay elements that are connected in series. Intermediate points between the delay elements provide delayed pulses having different delay times. Upon receiving the second input pulse, a selector selects one delay pulse provided by the delay element at which the first input pulse has arrived, and generates a digital positional signal indicating a position of the selected delay element. The number of rounds of circulation of the first input pulse in the ring signal delay circuit is separately counted. According to the number of rounds of circulation of the first pulse and the positional signal, the digital signal indicating the phase difference between the first and second input phases is formed.
REFERENCES:
patent: 3578956 (1971-05-01), McCall
patent: 4206414 (1980-06-01), Chapman
patent: 4216544 (1980-08-01), Boleda et al.
patent: 4712904 (1988-01-01), Ozaki et al.
patent: 4715050 (1988-12-01), Tanaka et al.
patent: 5027373 (1991-06-01), Cok
Hoshino Kouichi
Ohtsuka Yoshinori
Watanabe Takamoto
Heyman John S.
Nippon Soken Inc.
Nippondenso Co. Ltd.
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