Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2007-11-27
2007-11-27
Choe, Henry (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S254000
Reexamination Certificate
active
11384459
ABSTRACT:
The present invention is a differential transconductance amplifier circuit that includes matched cross-coupled transconductance elements connected such that the differential gain of the amplifier is determined by only passive elements. By virtually eliminating the effects of active elements on the amplifier gain, the amplifier operates in a very linear manner over its entire operating range. Power consumption, amplifier noise level, and dynamic range can be optimized with appropriate selection of the passive elements that determine amplifier gain.
REFERENCES:
patent: 3737797 (1973-06-01), Amemiya
patent: 6100758 (2000-08-01), Klemmer
patent: 6509795 (2003-01-01), Ivanov
patent: 7245181 (2007-07-01), Sanduleanu et al.
Allott Stephen
Moffat Mark Alexander John
Choe Henry
RF Micro Devices, Inc.
Withrow & Terranova , PLLC
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