| US 7,538,604 B2 | ||
| Amplifier feedback switch configuration with improved PSRR | ||
| Hynek Saman, Beroun (Czech Republic); Peter Murin, Poltar (Slovakia (Slovak Republic)); Martin Boksa, Svidnik (Slovakia (Slovak Republic)); and Pavel Panus, Praha (Czech Republic) | ||
| Assigned to STMicroelectronics S.A., Montrouge (France); and STMicroelectronics Design and Application s.r.o., Praha (Czech Republic) | ||
| Filed on Jan. 19, 2007, as Appl. No. 11/655,774. | ||
| Claims priority of application No. 06100667 (EP), filed on Jan. 20, 2006. | ||
| Prior Publication US 2007/0170974 A1, Jul. 26, 2007 | ||
| Int. Cl. H03F 1/02 (2006.01) | ||
| U.S. Cl. 330—9 [330/86] | 11 Claims |
| 1. A circuit comprising:
a first sensitive node;
a first component connected between the first sensitive node and a first terminal of a first switch, said first switch controlled
by a first control signal variable between a supply voltage level and a second voltage level; and
a second switch comprising a first terminal connected to the first terminal of said first switch, and a second terminal connected
to a clean voltage supply, said second switch controlled to connect the first node of said first switch to said clean voltage
supply when said first switch is in a non-conducting state, wherein the first component comprises a resistor or a switch,
and wherein a second terminal of the first switch is connected to an output node of an amplifier, and the first sensitive
node is connected to an input node of the amplifier.
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