Oscillators – Automatic frequency stabilization using a phase or frequency... – Amplitude compensation
Reexamination Certificate
2011-01-04
2011-01-04
Chang, Joseph (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Amplitude compensation
C331S109000, C331S158000, C331S182000, C331S183000, C331S185000, C331S186000
Reexamination Certificate
active
07863989
ABSTRACT:
A gain control system comprises a reference stage, a bias replication stage, an operational amplifier, an automatic gain control block, a gain stage, and a crystal oscillator in one embodiment. A negative feedback loop is formed by portions of the operational amplifier, the replica biasing stage, the gain stage, and the automatic gain control stage. The negative feedback loop operatively controls an amplitude of oscillation in the crystal oscillator. The automatic gain control block produces output currents at reference levels in proportion to an input current source. The output current reference levels provide a corresponding yet independent scaling of currents in the bias replication stage and the gain stage. By the scaling capabilities provided a high common mode of voltage is provided between the crystal oscillator and the voltage reference section while stable oscillating characteristics are provided over a broad frequency range.
REFERENCES:
patent: 5347237 (1994-09-01), Rokos
patent: 6278338 (2001-08-01), Jansson
patent: 6577204 (2003-06-01), Midtgaard
patent: 6798301 (2004-09-01), Balan et al.
patent: 7061337 (2006-06-01), Partovi et al.
patent: 7123109 (2006-10-01), Stevenson et al.
patent: 7583151 (2009-09-01), Fan et al.
patent: 2004/0113709 (2004-06-01), Sibrai et al.
patent: 2006/0158271 (2006-07-01), Juang et al.
patent: 2008/0297265 (2008-12-01), Tarng et al.
patent: 2009/0146751 (2009-06-01), Pernia et al.
Orberk Omer Fatih
Shkidt Alexei
Chang Joseph
Holland & Hart LLP
Shin Jeffrey
Spectra Linear, Inc.
LandOfFree
Replica-bias automatic gain control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Replica-bias automatic gain control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Replica-bias automatic gain control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2634318