Patent ID: 6489914
Filing Date: 2002-12-03
Classification: H03M

Abstract:
An analog-to-digital converter, comprising:a redundant signed digit (RSD) stage having an input terminal for receiving an analog input signal and having an output terminal for providing a digital output signal, wherein the RSD stage further comprising: an operational amplifier having a first input terminal, a reference terminal and an output terminal; an input capacitor having a first plate electrode coupled to the first input terminal of the operational amplifier, and a second plate electrode; a pair of precharge capacitors switchably coupled between the first input terminal of the operational amplifier and one or more of either the output terminal of the operational amplifier, an input terminal for receiving an analog input signal, and a reference voltage input terminal; a first pair of integrating capacitors switchably coupled between the second plate electrode of the input capacitor and one or more of either the output terminal of the operational amplifier, the input terminal for receiving an analog input signal, and the reference voltage input terminal; and a second pair of integrating capacitors switchably coupled between the second plate electrode of the input capacitor and one or more of either the output terminal of the operational amplifier, the input terminal for receiving the analog input signal, and the reference voltage input terminal.