Low power self-biasing oscillator circuit

Details Low power self-biasing oscillator circuit Low power self-biasing oscillator circuit

2002-01-17

2004-08-10

Shingleton, Michael B (Department: 2817)

Oscillators

Electromechanical resonator

Crystal

C331S1160FE, C331S1160FE, C331S165000, C331S185000, C331S175000, C331S186000

Reexamination Certificate

active

06774735

ABSTRACT:

TECHNICAL FIELD
This invention relates to low power oscillator circuits.
BACKGROUND
A computer typically has a real time clock (RTC) circuit that resides in the input/output (I/O) controller hub chip, sometimes referred to as the “south bridge.” In many computers, the RTC circuit provides an accurate 32.768 KHz oscillating signal that is used to keep the system time whether the computer is on or off. The time signal generated by the RTC circuit is used as a basis to obtain the second, minute, and hour values required by the computer.


REFERENCES:
patent: 5848253 (1998-12-01), Walsh et al.
patent: 6191662 (2001-02-01), Volk
patent: 6278338 (2001-08-01), Jansson
patent: 2000031740 (2000-01-01), None
Vittoz et al. “CMOS Analog Integrated Circuits Based on Weak Inversion Operation” IEEE Journal of Solid-State Circuits, Jun. 1977 pp. 224-231.*
Millman “Microelectronics” McGraw-Hill Book Co 1979 pp. 237.

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