Sony Semiconductor Solutions Corporation

Advasense Technologies (2004) Ltd.

Vadim Tkachev

Vladimir Koifman

A current mode sigma-delta modulator comprises an input node; a comparator that compares a voltage of the input node to a reference voltage and outputs a comparison result; an integrating capacitor connected to an input of the comparator; and a switched capacitor circuit connected at a first end to the input node, the input of the comparator, and the integrating capacitor, and connected at a second end to an output of the comparator. The current mode sigma-delta modulator is a component of an analog-to-digital converter.

Fast current mode sigma-delta analog-to-digital converter

A device that includes: (i) an input node, adapted to receive an analog input current; (ii) an integrating capacitor; wherein a first end of the integrating capacitor is connected to the input node; (iii) a quantizer that comprises a data input, a clock input and an output; wherein the data input is connected to the input node, the clock input receives a jittered clock signal and the output controls a first switch in response to a voltage level of the input node; (iv) a fast charge transfer circuit, for transferring to the integrating capacitor a fixed charge if a first switch is closed; wherein the fixed charge is being transferred during a charge transfer period that is substantially shorter than a minimal clock signal phase of the jittered clock signal; and (v) a first switch, connected between the input node and the fast charge transfer circuit.

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Rehovot, Israel

Vadim Tkachev