LC oscillator

Details LC oscillator LC oscillator

2007-02-13

2007-02-13

Kinkead, Arnold (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S167000, C331S1170FE

Reexamination Certificate

active

10528254

ABSTRACT:
An LC oscillator (I) comprises a cross-coupled PMOS transistor pair (Ma, Mb) coupled to a pair of capacitors (Cva, Cvb) and a pair of inductances (La, Lb). To enhance the signal amplification of the oscillator, a pair of auxiliary transistor circuits (Qa, Qb; Na, Nb) is provided which are coupled between the drain and, preferably, the source of each PMOS transistor. The capacitors (Cva, Cvb) are preferably variable capacitors and the inductances (La, Lb) are preferably connected to ground to allow a enlarged tuning voltage range.

REFERENCES:
patent: 6268778 (2001-07-01), Mucke et al.
patent: 6683509 (2004-01-01), Albon et al.
patent: 6987425 (2006-01-01), Sutardja
Hung C-M et al: “Fully Integrated 5.35-GHZ CMOS VCOS and Prescalers” IEEE Transactions on Microwave Theory and Techniques, IEEE Inc. New York, US, vol. 49, No. 1, Jan. 1, 2001, pp. 17-22.

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