Oscillator circuit

Details Oscillator circuit Oscillator circuit

2005-03-22

2005-03-22

Kinkead, Arnold (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S143000, C331S03600C

Reexamination Certificate

active

06870433

ABSTRACT:
An oscillator circuit having a charge storage device, an upward integration current source, and a downward integration current source is described. The charge storage device is also connected to a comparator in order to drive the current sources as a function of a lower comparator threshold and an upper comparator threshold. In consequence, a triangular waveform voltage is formed across the charge storage device, on the basis of the relaxation principle. The difference voltage from the two comparator thresholds is dropped across a first resistor. Since the comparator itself as well as the lower and upper current thresholds are formed in a common current path, this oscillator circuit has a particularly low current draw.

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Flynn, M. P. et al.: “A 1.2-μm CMOS Current-Controlled Oscillator”, IEEE Journal of Solid-State Circuits 27, New York, Jul. 1992, No. 7, pp. 982-987.

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