Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2006-10-30
2008-11-11
Nguyen, Khanh V (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S255000, C330S258000
Reexamination Certificate
active
07449950
ABSTRACT:
An analog signal processing block with differential signal inputs and including a differential amplifier with differential inputs is disclosed which is configurable to operate either in a differential output mode or in a single-ended output mode without affecting the desired frequency and time characteristics as determined by the switched capacitor networks. The analog signal processing block includes a pair of switched capacitor networks each having one of the differential signal inputs, an input-sided terminal connected to one of the differential inputs of the differential amplifier and an output-sided terminal. The output-sided terminal of a first one of the switched capacitor networks is connected to an output of the differential amplifier. The output-sided terminal of a second one of the switched capacitor networks is connected to a complementary output of the differential amplifier when configured to differential output mode, and connected to a reference potential when configured to the single-ended mode. In this way, an application can use an analog signal processing block in either of the fully differential and single-ended output modes without the need to reconfigure the switched capacitor networks for a desired frequency and time response characteristic.
REFERENCES:
patent: 6624698 (2003-09-01), Nagaraj
patent: 7276962 (2007-10-01), Tomasi
Brady III Wade J.
Franz Warren L.
Nguyen Khanh V
Telecky , Jr. Frederick J.
Texas Instruments Deutschland GmbH
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