Method and system for a differential switched capacitor...

Details Method and system for a differential switched capacitor... Method and system for a differential switched capacitor...

2006-07-04

2006-07-04

Mis, David (Department: 2817)

Oscillators

Frequency stabilization

C331S1170FE, C331S1170FE, C331S17700V, C331S179000

Reexamination Certificate

active

07071790

ABSTRACT:
Methods and systems for increasing an amplifier circuit's Q factor are disclosed herein. The method may comprise coupling a first LC tank to a source of a single switching transistor and coupling a second LC tank to a drain of the single switching transistor. A gate of the single switching transistor may be controlled by an amplifier core coupled to the first LC tank and the second LC tank. A resistance of the first LC tank and the second LC tank may be decreased by about one half, which increases the Q factor by about two. The gate of the single switching transistor may be controlled by a control signal generator coupled to the amplifier core. The first LC tank and/or the second LC tank may be tuned to a frequency of about 3.4 GHz to 4 GHz. The single switching transistor may comprise an NMOS transistor.

REFERENCES:
patent: 6013958 (2000-01-01), Aytur
patent: 6239665 (2001-05-01), Strom
patent: 6621365 (2003-09-01), Hallivuori et al.
patent: 6624484 (2003-09-01), Christensen
patent: 6661301 (2003-12-01), Traub
patent: 6815996 (2004-11-01), Hsiao
patent: 6940358 (2005-09-01), Meacham
patent: 6992532 (2006-01-01), Christensen
patent: 2002/0070815 (2002-06-01), Traub
patent: 2005/0174184 (2005-08-01), Wu

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