Amplitude control circuit

Details Amplitude control circuit Amplitude control circuit

2006-06-13

2006-06-13

Mis, David (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S17700V, C331S183000, C331S186000

Reexamination Certificate

active

07061337

ABSTRACT:
An amplitude control circuit comprises a first circuit configured to receive differential signals and provide a first signal based on the amplitudes of the differential signals, a second circuit configured to receive a bias signal and provide a second signal based on the bias signal, and a third circuit configured to provide bias to the first circuit and the bias signal to the second circuit. The bias signal is set to provide selected amplitudes of the differential signals.

REFERENCES:
patent: 5635876 (1997-06-01), Gerrits et al.
patent: 5714911 (1998-02-01), Gilbert
patent: 5818306 (1998-10-01), Lee et al.
patent: 6653908 (2003-11-01), Jones
patent: 6680655 (2004-01-01), Rogers
patent: 6812802 (2004-11-01), Godambe et al.
patent: 6838952 (2005-01-01), Ramet
Hitko and Sodini, “Adaptive Biasing of a 5.8GHz CMOS Oscillator”, ISSC Digest of Tech Papers, Feb. 2002; 9 pps.
Margarit, “A Low-Noise Low-Power VCO with Automatic Amplitude Control for Wireless Applications”; J Solid State Circuits, Jun. 1999, 11 pps.

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