Switched supply for operational amplifier

Details Switched supply for operational amplifier Switched supply for operational amplifier

2006-11-14

2006-11-14

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

C330S127000

Reexamination Certificate

active

07135930

ABSTRACT:
There is provided a circuit and method for providing a supply voltage to an operational amplifier. A switch has a plurality of inputs connected to a respective plurality of supply voltages. An output of the switch is connected to a supply voltage terminal of an operational amplifier. The input of the switch is selected in dependence of the voltage levels to which a signal is to be amplified

REFERENCES:
patent: 4873493 (1989-10-01), Fujiwara
patent: 5546051 (1996-08-01), Koizumi et al.
patent: 5760652 (1998-06-01), Maemura et al.
patent: 5898342 (1999-04-01), Bell
patent: 5990751 (1999-11-01), Takita
patent: 6218897 (2001-04-01), Barzegar et al.
patent: 6400228 (2002-06-01), Verbist et al.
patent: 6621350 (2003-09-01), Verbist et al.

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