Counter having programmable periods and method therefor

Details Counter having programmable periods and method therefor Counter having programmable periods and method therefor

1996-07-02

1998-05-05

Heckler, Thomas M.

Electrical pulse counters, pulse dividers, or shift registers: c

Counting or dividing in incremental steps

Beam type tube

377 52, G06K 1025, H03K 2300

Patent

active

057489491

ABSTRACT:
A counter (200) generates signals which have an average period of a non-integer multiple of an input clock period. Through the use of this non-integer multiple period, non-integer division operations are executed and used in circuits such as pulse width modulators (800) and phase lock loops (900). Additionally, when the counter (200') is used with a Gray coded counter, the average duty cycle of all bits is exactly equal to 50%.

REFERENCES:
patent: 4443887 (1984-04-01), Shiramizu
patent: 4891825 (1990-01-01), Hansen
patent: 4935944 (1990-06-01), Everett
patent: 4975931 (1990-12-01), Cosand
patent: 5127036 (1992-06-01), Pham
patent: 5365119 (1994-11-01), Kivari
patent: 5390223 (1995-02-01), Lindholm
patent: 5425074 (1995-06-01), Wong
patent: 5526391 (1996-06-01), Shankar et al.
patent: 5548787 (1996-08-01), Okamura

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