Patent ID: 6611163
Filing Date: 2003-08-26
Classification: G01R,H03F,H03K

Abstract:
A circuit comprising:a preamplifier; a first capacitor coupled to a first input of the preamplifier; a second capacitor coupled to the first input of the preamplifier; a first switch coupled to the second capacitor; a third capacitor coupled to a second input of the preamplifier; a fourth capacitor coupled to the second input of the preamplifier; a second switch coupled to the fourth capacitor; a third switch coupled between the second and fourth capacitors; and a previous stage amplifier wherein the first capacitor is coupled between a first output of the previous stage amplifier and the first input of the preamplifier, and the third capacitor is coupled between a second output of the previous stage amplifier and the second input of the preamplifier.