Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2008-05-06
2008-05-06
Pascal, Robert J. (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C327S309000
Reexamination Certificate
active
11325843
ABSTRACT:
System and method for limiting an output signal of a differential amplifier. A preferred embodiment comprises a limit sense amplifier configured to detect when the output exceeds a permitted limit, a common mode bias current unit configured to increase a signal gain of a common mode amplifier in the differential operational amplifier when the limit sense amplifier detects that the output exceeded the permitted limit, and an output stage bias current unit configured to fix the output at a level substantially equal to the specified limit when the limit sense amplifier detects that the output exceeded the permitted limit. The clamping is achieved by changing the operation of circuitry within the differential amplifier and results in a smoother clamping that helps to maintain stable operation.
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Brady III Wade J.
Flanagan Krista M
Pascal Robert J.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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