Maziar Sayyedi

US Patent:

20080094135, Apr 24, 2008

Filed:

Apr 19, 2007

Appl. No.:

11/737616

Inventors:

Babak Mazda - Los Altos CA, US
Rahul Shinkre - Cupertino CA, US
Farzad Sahandiesfanjani - Santa Clara CA, US
Maziar Sayyedi - Mountain View CA, US
Krishna Sarangapani - Santa Clara CA, US

International Classification:

H03F 1/02

US Classification:

330009000

Abstract:

An amplifier is described which includes a first loop including a first amplifier stage having an offset voltage associated therewith. An output stage includes two switching devices in a bridge configuration configured to be coupled between a supply voltage and ground. An output of the bridge configuration is configured to be coupled to a load. The first loop is characterized by a first gain. A decoupling capacitor is configured to be coupled to the load. A second loop which includes the first amplifier stage is configured to charge the decoupling capacitor to a first voltage generated with reference to the offset voltage before operation of the switching devices is enabled. The second loop is characterized by a second gain. The first and second gains are substantially the same such that when operation of the switching devices is enabled a second voltage at the output of the half-bridge configuration is substantially the same as the first voltage.