Transformer coupled oscillator and method

Details Transformer coupled oscillator and method Transformer coupled oscillator and method

2006-01-03

2006-01-03

Kinkead, Arnold (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S1170FE, C331S175000, C331S167000, C331S03600C

Reexamination Certificate

active

06982605

ABSTRACT:
In a particular embodiment, an oscillator adjustment circuit is disclosed. The oscillator adjustment circuit includes a resonator portion comprising a capacitive element coupled to an inductive element and a signal balancing portion comprising a secondary coil of the transformer. The inductive element comprises a primary coil of a transformer. The secondary coil has a grounded center tap.

REFERENCES:
patent: 4999589 (1991-03-01), DaSilva
patent: 5422605 (1995-06-01), Yang et al.
patent: 5821802 (1998-10-01), Yuen
patent: 6026286 (2000-02-01), Long
patent: 6150893 (2000-11-01), Fattaruso
patent: 2001/0007437 (2002-12-01), Mashimo
patent: 2001/0013813 (2003-03-01), Forbes
Plouchart et al., “A Fully-Monolithic SiGe Differential Voltage-Controlled Oscillator for 5 GHZ Wireless Applications,” 2000 IEEE Radio Frequency Integrated Circuits Symposium, pp. 57-60, Yorktown Heights, New York.
Tchamov et al., “High-Performance Differential VCO Based on Armstrong Oscillator Topology,” IEEE Journal of Solid-State Circuits, vol. 36, No. 1, January 2001, pp. 139-141.

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