Oscillators – Solid state active element oscillator – Transistors
Patent
1998-07-29
2000-07-18
Kinkead, Arnold
Oscillators
Solid state active element oscillator
Transistors
331116R, 331117R, 331158, 331144, 331183, H03L 500
Patent
active
06091307&
ABSTRACT:
A crystal tank circuit is connected between the ac cross-coupled outputs of two transistors that are selectively biased to an appropriate common mode voltage to cause rapid build-up of oscillation when the circuit is turned on and in which oscillation is sustained in the desired mode regardless of battery voltage fluctuation without wasting power. The differentially driven frequency-controlling crystal tank circuit receives balanced driving voltage excursions from the circuit.
REFERENCES:
patent: 3899753 (1975-08-01), Malaviya
Aebischer, D; Oguey, HJ; Kaenel, VR, "A 2.1 MHz Crystal Oscillator Time Base with a Current Consumption under 500 nA", IEEE Journal of Solid-State Circuits, vol. 32, No. 7, Jul. 1997, pp. 999-1005.
Vittoz, EA; Degrauwe, MGR; Bitz, S, "High-Performance Crystal Oscillator Circuits: Theory and Application", IEEE Journal of Solid State Circuits, vol. 23, No. 3, Jun. 1988, pp774-782.
Lewyn, LL; Lucas, CH; Mulligan, JR, Jr., CMOS Oscillator Subsystem Optimized for Minimum Power Consumption, IEEE International Symposium on Circuits and Systems, 1983, pp. 513-526.
Handbook of Piezoelectric Crystals for Radio Equipment Designers, Wright Air Development Center, Oct. 1956, pp. 218-222.
Kinkead Arnold
Lucent Techmologies Inc.
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