Timer circuit

Details Timer circuit Timer circuit

1997-07-07

2000-10-03

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327 66, 327206, 330257, H03K 312

Patent

active

061278688

ABSTRACT:
The 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.

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Lancaster, Dan., "Chapter 4: Multivibrators," CMOS Cookbook, 2nd ed., Prentice Hall Computer Publishing,1993, pp. 297-304.
Wigmore, T., "More Applications For The 555", Elektor Electronics, 15(1989) Feb., No. 164, London, GB, pp. 24-28.

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