Patent ID: 6825739
Filing Date: 2004-11-30
Classification: H03H

Abstract:
A switched capacitor circuit, comprising:a differential amplifier; a non-inverting-side line, one end of which is connected to a non-inverting-side first capacitor, and the other end of which is connected to a non-inverting input terminal of the differential amplifier via a non-inverting-side second capacitor; and an inverting-side line, one end of which is connected to an inverting-side first capacitor, and the other end of which is connected to an inverting input terminal of the differential amplifier via an inverting-side second capacitor, wherein a signal line crossing one of the lines is so positioned as to cross the other of the lines, wherein (a) a portion of the non-inverting-side line from an end of the non-inverting-side second capacitor to a cross-point between the non-inverting-side line and the signal line or to a vicinity of the cross-point, and (b) a portion of the inverting-side line from an end of the inverting-side second capacitor to a cross-point between the inverting-side line and the signal line or to a vicinity of the cross-point, are positioned next to each other, and wherein operation is carried out in accordance with the principle of conservation of charge in the both lines.