Oscillators – Solid state active element oscillator – Transistors
Patent
1993-04-22
1996-01-23
Dolinar, Andrew M.
Oscillators
Solid state active element oscillator
Transistors
331158, H03B 506, H03B 536
Patent
active
054867959
ABSTRACT:
The LOW POWER CRYSTAL OSCILLATOR shown here reduces power consumption of a Pierce oscillator which has an inverter preferably made of an NFET N0 and a PFET P0 in series. A load, preferably an NFET N1 with its gate wired to its source, is placed in parallel with a switch, preferably a PFET P1, between P0 and Vcc. A clamp, preferably a PFET P2 with its gate wired to its source, is placed in parallel with a switch, preferably an NFET N2, between N0 and ground. The switches are enabled during power-up, thereby providing quick turn-on of the oscillator. They are then disabled, thereby reducing the voltage across the crystal XTAL and consequently reducing the power consumed.
REFERENCES:
patent: 4282496 (1981-08-01), Huener
Gupta Rajiv
Spence John R.
Zhang Mingming
Dolinar Andrew M.
Montanye George A.
Rockwell International Corporation
Silberberg Charles T.
Streeter Tom
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