Oscillators – Frequency stabilization – Temperature or current responsive means in circuit
Patent
1993-11-26
1995-01-31
Pascal, Robert J.
Oscillators
Frequency stabilization
Temperature or current responsive means in circuit
331 66, H03L 102
Patent
active
053862015
ABSTRACT:
An oscillator circuit with enhanced frequency characteristics is provided. This oscillator circuit includes a buffer (102) to amplify the output signal and provide a positive feedback, an inverter (106) to provide negative feedback to cause oscillation, a capacitive divider circuit (110, 112) for charge storage, a resistor (116) to provide controlled discharge, and a diode circuit (114) for providing frequency stability. Since frequency stability is included within the oscillator circuit, there may be no need to perform resistor trimming at the time of manufacture. Further, the capacitive divider circuit eliminates parasitic charge injection.
REFERENCES:
patent: 4603308 (1986-07-01), Briefer
patent: 4667171 (1987-05-01), Matthys
patent: 4898462 (1990-02-01), Numata et al.
Fletcher, William I., "An Engineering Approach To Digital Design", 1980 by Prentice-Hall, pp. 298-301.
Bennett Paul T.
Gray Randall C.
Pigott John
Dover Rennie W.
Motorola Inc.
Pascal Robert J.
Vu David H.
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