Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2007-09-20
2009-12-01
Nguyen, Khanh V (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S255000, C330S260000, C330S267000
Reexamination Certificate
active
07626458
ABSTRACT:
An amplifier driver circuit (10) includes first (11-1) and second (11-2) feedback amplifiers including first (14-1) and second (14-2) upper current mirrors, respectively, and first (16-1) and second (16-2) lower current mirrors, respectively, first (12-1) and second (12-2) amplifier input stages receiving a common mode input signal, and first (18-1) and second (18-2) amplifier output stages coupled to outputs of the first and second amplifier input stages, respectively. Each current mirror has an input (IN) and first (OUT1) and second (OUT2) outputs. Upper bias terminals of the first (12-1) and second (12-2) amplifier input stages are coupled to the inputs (IN) of the first (14-1) and second (14-2) upper current mirrors, respectively, and are cross-coupled to the second outputs (OUT2) of the second (16-2) and first (16-1) lower current mirrors, respectively. Lower bias terminals of the first (12-1) and second (12-2) amplifier input stages are coupled to the inputs (IN) of the first (16-1) and second (16-2) lower current mirrors, respectively, and are cross-coupled to the second outputs (OUT2) of the second (14-2) and first (14-1) upper current mirrors, respectively, to oppose signals at the inputs (IN) of the current mirrors in response to the common mode input signal.
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Damitio Paul G.
Dashtestani Ahmad
Brady III Wade J.
Nguyen Khanh V
Patti John J.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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