Circuit for processing an input-signal voltage

A circuit for processing an input-signal voltage, and including an input capacitance coupled between an input node of the circuit and a sense node of a comparator; a reference capacitance coupled to the sense node of the comparator; and a common mode switch coupled between the sense node and a refer...

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Bibliographic Details
Main Authors Bogner, Peter, Maderbacher, Gerhard
Format Patent
LanguageEnglish
Published 25.02.2020
Subjects
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
PULSE TECHNIQUE
RESONATORS
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Summary:A circuit for processing an input-signal voltage, and including an input capacitance coupled between an input node of the circuit and a sense node of a comparator; a reference capacitance coupled to the sense node of the comparator; and a common mode switch coupled between the sense node and a reference node of the comparator. The circuit is configured to have the input capacitance set to a reference input voltage while the common mode switch is closed, and the input node set to the input-signal voltage while the common mode switch is open. The reference capacitance includes a plurality of capacitances, at least one of which is provided as a switched capacitance that is selectively controllable to configure the plurality of capacitances. A switched capacitance controller is configured to control the switched capacitance so as to compensate, at the sense node, a comparator offset voltage.
Bibliography:Application Number: US201916251315