Patent ID: 6556072
Filing Date: 2003-04-29
Classification: G11C,H03F,H03H,H03K

Abstract:
A switched capacitor circuit having circuit input and output terminals, comprising:an amplifier having an amplifier input terminal and an amplifier output terminal, said amplifier output terminal being the circuit output terminal; a first switch element having first and second switch terminals and a switch common terminal alternatively coupled to said first and second switch terminals of said first switch element, said first switch terminal of said first switch element coupled to the circuit input terminal and said second switch terminal of said first switch element coupled to a first reference voltage; a second switch element having first and second switch terminals and a switch common terminal alternatively coupled to said first and second switch terminals of said second switch element, said first switch terminal of said second switch element coupled to said amplifier input terminal and said second switch terminal of said second switch element coupled to a second reference voltage; a first impedance element coupled between said switch common terminal of said first switch element and said switch common terminal of said second switch element; a second impedance element coupled between said switch common terminal of said first switch element and said first reference voltage; and first and second control signals controlling said first and second switch elements, respectively, and causing said switch common terminal of said first switch element to be coupled to the circuit input terminal when said switch common terminal of said second switch element is coupled to said second reference voltage and causing said switch common terminal of said first switch element to be coupled to said first reference voltage when said switch common terminal of said second switch element is coupled to said amplifier input terminal.