Oscillators – Frequency stabilization – Temperature or current responsive means in circuit
Reexamination Certificate
2005-04-07
2009-10-06
Pascal, Robert (Department: 2817)
Oscillators
Frequency stabilization
Temperature or current responsive means in circuit
C331S111000, C331S143000
Reexamination Certificate
active
07598822
ABSTRACT:
Precision integrated time reference circuits are disclosed. Preferred embodiments provide time reference circuits that are relatively insensitive to variations in process, supply, and temperature. A preferred embodiment of the invention is disclosed in which a relaxation oscillator according to the invention includes a reference voltage circuit configured to maintain a reference voltage in proportion to actual circuit resistance values. Aspects of the invention also include dynamic compensation for variations in temperature.
REFERENCES:
patent: 5180995 (1993-01-01), Hayashi et al.
patent: 6091286 (2000-07-01), Blauschild
patent: 6356161 (2002-03-01), Nolan et al.
patent: 6496056 (2002-12-01), Shoji
patent: 6917249 (2005-07-01), Kuo et al.
Rajagopal Narasimhan Trichy
Siniscalchi Patrick Peter
Brady III Wade J.
Goodley James E
Kempler William B.
Pascal Robert
Telecky , Jr. Frederick J.
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