Time-interval signal generating apparatus

Details Time-interval signal generating apparatus Time-interval signal generating apparatus

1985-02-27

1987-01-06

Heyman, John S.

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

Counting or dividing in incremental steps

Beam type tube

377 39, G01R 2902

Patent

active

046349855

ABSTRACT:
In the particular embodiment of the invention described in the specification, a variable resistor is connected in potentiometer fashion to a DC power source and a time interval is selected according to the position of the movable contact. The ratio of the partial voltage provided by the movable contact to the full voltage applied to the resistor is determined and an oscillator signal target count for the selected time interval is computed from a count corresponding to the total voltage. The arrangement permits accurate time interval determination which is independent of variations in the supply voltage, variations in resistance value of the variable resistor, or environmental changes.

REFERENCES:
patent: 2251763 (1941-08-01), Schoene
patent: 2337905 (1943-12-01), Livingston
patent: 3207926 (1965-09-01), Schmader
patent: 3337722 (1967-08-01), Siess et al.
patent: 3560863 (1971-02-01), Baumdel
Motorola CMOS Integrated Circuits, Series C, Motorola, Inc., 1978, previous edition 1976, prepared by Technical Information Center.

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