Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2007-07-03
2007-07-03
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S258000, C330S12400D
Reexamination Certificate
active
11136221
ABSTRACT:
An amplifier circuit includes first (7A) and second (7B) operational amplifiers connected in a parallel configuration. A first terminal (12) of a first input resistor (5) is coupled to one input of both of the first (7A) and second (7B) amplifiers. A first terminal (15) of a second input resistor (6) is coupled to another input of both of the first (7A) and second (7B) amplifiers. A differential input voltage is applied between the second terminals of the first and second input resistors. The output signals of the first (7A) and second (7B) operational amplifiers are combined to produce an output signal (11AB) representative of feedback currents produced in the first (5) and second (6) input resistors. Upper and lower common mode input voltage ranges associated with the differential input voltage extend substantially above and below the upper and lower supply voltages, respectively, of the amplifier circuit.
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Gammie David A.
Mullins Edward
Parfenchuck Jeffery B.
Brady III Wade J.
Nguyen Patricia
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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