Apparatus and method for dynamic time-dependent amplifier...

Details Apparatus and method for dynamic time-dependent amplifier... Apparatus and method for dynamic time-dependent amplifier...

2007-01-30

2007-01-30

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C323S273000, C323S274000

Reexamination Certificate

active

11121785

ABSTRACT:
A circuit for driving a capacitive load is provided. The circuit includes a differential signal sensor and a differential amplifier. The differential amplifier is arranged to drive the capacitive load. Further, the differential amplifier is arranged to receive an output voltage at one input, and to receive a reference voltage at another input. The output voltage is provided at the output of the differential amplifier. Also, the differential amplifier is arranged to receive a bias current. The differential signal sensor is arranged to determine whether the difference between the output voltage and the reference voltage is within a voltage window. If the difference between the output voltage and the reference voltage is inside of the voltage window, the bias current is provided at its normal value. However, if the difference between the output voltage and the reference voltage is outside of the voltage window, the bias current is increased so that the bias current linearly increases with respect to time.

REFERENCES:
patent: 6465994 (2002-10-01), Xi
patent: 6828712 (2004-12-01), Battaglin et al.
patent: 6836080 (2004-12-01), Kazanov et al.
patent: 6975099 (2005-12-01), Wu et al.
patent: 6977491 (2005-12-01), Caldwell et al.
patent: 7091710 (2006-08-01), Yang et al.

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