Apparatus for conditioning a control signal

Details Apparatus for conditioning a control signal Apparatus for conditioning a control signal

Filed on

1990-05-07

Date issued

1991-11-05

Examiner

Heyman, John S.

Patent Class

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

SubClass

Systems

SubSubClass

Particular input circuit

Other Related Categories

377 39, 377 45, 328147, H03K 2102

Type

Patent

Status

active

Patent number

050635808

Description

ABSTRACT:
Apparatus for controlling the time constant of a signal includes an up/down counter for counting pulses of a clock signal. The count value is utilized as output signal. The output signal is compared with the input signal to provide a first control signal determinative of whether the counter counts up or down. The output signal is compared with the input signal offset by a constant value to provide a signal which is ORed with the first control signal, and the ORed signal is utilized to enable/disable the counter. Applying a constant offset value to the input signal to be compared precludes the system from alternately counting up and down by one unit value during intervals of relatively constant amplitude input signals.

REFERENCES:
patent: 3989931 (1976-11-01), Phillips
patent: 4086538 (1978-04-01), Foreman
patent: 4220849 (1980-09-01), Harzer
patent: 4321460 (1982-03-01), Mohammadioun
patent: 4635102 (1987-01-01), Bolger
patent: 4715051 (1987-12-01), Giardina
patent: 4757464 (1988-07-01), Zimmermann et al.

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