Oscillator circuit having temperature and supply voltage...

Details Oscillator circuit having temperature and supply voltage... Oscillator circuit having temperature and supply voltage...

2006-06-02

2008-10-07

Pascal, Robert J. (Department: 2817)

Oscillators

Relaxation oscillators

Multivibrators

C331S11300A, C331S176000

Reexamination Certificate

active

07432771

ABSTRACT:
An oscillator circuit includes a current source comprising an amplifier, a first resistor, a second resistor, and a third inverter whose input and output are connected and coupled with an input of the amplifier. The amplifier is configured to generate a first current flowing through the first resistor and the second resistor. The oscillator circuit also includes a vibrator circuit comprising a first capacitor and a second capacitor, wherein the first capacitor is configured to charge in response to the first current and discharge when the voltage across the first capacitor reaches a first threshold voltage of a first inverter and the second capacitor is configured to charge in response to the first current and discharge when the voltage across the first capacitor reaches a second threshold voltage of a second inverter and a latch circuit comprising the first inverter and the second inverter, wherein the latch circuit is configured to produce an oscillating signal in response to the charging and the discharging of the first capacitor and the second capacitor in the vibrator circuit.

REFERENCES:
patent: 5180995 (1993-01-01), Hayashi et al.
patent: 5638029 (1997-06-01), O'Shaughnessy
patent: 5870004 (1999-02-01), Lu
patent: 6356161 (2002-03-01), Nolan
patent: 6825735 (2004-11-01), Chung
patent: 6917249 (2005-07-01), Kuo
patent: 6980062 (2005-12-01), Fujita
patent: 7034627 (2006-04-01), Kudari
patent: 7049899 (2006-05-01), Kato

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