Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Pulse multiplication or division
Patent
1986-05-02
1987-06-09
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Systems
Pulse multiplication or division
377 49, 377 24, 364561, G01P 3481, G06F 1300
Patent
active
046726438
ABSTRACT:
A serial pulse frequency converter is disclosed of the type which counts high frequency clock pulses between input pulses, multiplies each successive count by first and second proportionally constants and downcounts the products by high frequency clock pulses to produce output pulses at a new, proportional frequency. A first serial register is used to both count the high frequency pulses between input pulses and hold the count during the multiplication process. It is loaded at the end of multiplication with the a number representing the "lost counts" as it is switched to its counting mode. A second serial register accumulates the sum of partial products of the count and the proportionality constants. The gain circuit serially provides a first proportionality constant and then a second, but may selectively substitute a binary number representing a constant unity for the second. A low frequency detect circuit disables the output if a one is detected in the most significant bit of the first serial register and does not reenable the circuit until two consecutive zeros are detected in the bit. This allows the use of certain economical circuitry in the partial product accumulation and downcounting circuitry which produces accurate results as long as the most significant bit of the registers is zero.
REFERENCES:
patent: 3835396 (1974-09-01), Demos et al.
patent: 4051434 (1977-09-01), Sweet
patent: 4140970 (1979-02-01), Graziano
patent: 4339722 (1982-07-01), Sydor et al.
patent: 4413350 (1983-11-01), Bond et al.
patent: 4434470 (1984-02-01), Thomas et al.
patent: 4581713 (1986-04-01), Fennel
Digital Design--by R. K. Richards copyright 1971 by Wiley-Interscience, pp. 330-331 "Serial Techniques in Multiplication".
General Motors Corporation
Heyman John S.
Sigler Robert M.
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