Timer circuit

Details Timer circuit Timer circuit

1999-08-17

2000-03-14

Miska, Vit

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

G04F 800

Patent

active

060381981

ABSTRACT:
A timer circuit and oscillator are disclosed. The timer circuit is similar in functionality to a '555 timer circuit but uses few transistors. The timer circuit has two differential pairs of transistors, three current mirrors, two selectable current sources, and one inverter. The two differential pairs of transistors, three current mirrors, two selectable current sources, and one inverter are arranged to receive an IN+ voltage, an IN voltage, and a IN- voltage. From these inputs a Q and a Q(bar) output is generated. This timing circuit can be used to generate an oscillator by connecting a capacitor, a current source, and current drain to the IN voltage.

REFERENCES:
patent: 5311150 (1994-05-01), Engbretson et al.
patent: 5841827 (1998-01-01), Chevallier
patent: 5901194 (1999-05-01), Chevallier
patent: 5910739 (1999-06-01), Stanojevic

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