Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2007-07-22
2009-02-17
Choe, Henry K (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S257000
Reexamination Certificate
active
07492225
ABSTRACT:
A gain-controlled amplifier is disclosed including: a set of switches; first and second transistors whose second terminals are coupled to each other via a resistive element; a first current mirror, coupled to a first terminal of the first transistor, for providing a set of first currents; a second current mirror, coupled to a first terminal of the second transistor, for providing a set of second currents; a first resistive network, coupled to the second terminal of the first transistor via a current source, for providing a first output signal; and a second resistive network, coupled to the second terminal of the second transistor via another current source, for providing a second output signal. Both the first and second resistive networks have a plurality of taps, coupling to either a first current or a second current through a switch of the set of switches.
REFERENCES:
patent: 5668502 (1997-09-01), Rijns
patent: 5828265 (1998-10-01), Mensink et al.
patent: 6621343 (2003-09-01), Hart
patent: 6693491 (2004-02-01), Delano
patent: 7368990 (2008-05-01), Tsuchi
Choe Henry K
Hsu Winston
Realtek Semiconductor Corp.
LandOfFree
Gain-controlled amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gain-controlled amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gain-controlled amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4053532