Patent ID: 8350743
Filing Date: 2013-01-08
Classification: H03M

Abstract:
1. An electronic circuit comprising a sample and hold circuit having a differential amplifier with a first and a second output for a differential amplifier output voltage between the first and second output; an analog to digital converter; a first and a second switch coupled between a circuit node of the analog to digital converter and the first and second outputs of the differential amplifier respectively, a control circuit having outputs coupled to control inputs of the first and second switches, the control circuit being configured to generate control signals at the control inputs of the first and second switches that define a short circuit phase, a transfer phase and a passive phase, making the first and second switches simultaneously conductive in the short circuit phase, making a selectable one of the first and second switches conductive and the other non-conductive in the transfer phase and making both the first and second switches non-conductive in the passive phase.