Voltage-and temperature-compensated RC oscillator circuit

Details Voltage-and temperature-compensated RC oscillator circuit Voltage-and temperature-compensated RC oscillator circuit

2006-08-25

2008-10-21

Pascal, Robert J. (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S066000, C331S143000, C331S176000, C327S513000

Reexamination Certificate

active

07439818

ABSTRACT:
An integrated temperature-compensated RC oscillator circuit includes an inverter having an input and an output. An RC network is coupled between the inverter and a pair of comparators. A first comparator has an inverting input coupled to a first reference voltage, a non-inverting input coupled to the RC network, and an output. A second comparator has an inverting input coupled to the RC network, a non-inverting input coupled to a second reference voltage, and an output. A set-reset flip-flop has a set input coupled to the output of the first comparator, a reset input coupled to the output of the second comparator, and an output coupled to the input of the inverter. Differential amplifiers in the comparators each have a diode-connected p-channel MOS transistor controlling a mirrored p-channel MOS transistor whose channel width is less than that of the diode-connected p-channel current mirror transistor.

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