公开(公告)号：US20230034555A1

公开(公告)日：2023-02-02

申请号：US17859658

申请日：2022-07-07

Applicant: Socionext Inc.

Inventor： Jayaraman KUMAR ,  Kenneth Stephen HUNT

IPC: H03M1/66 ,  H03M1/38

Abstract: Mixed-signal circuitry including a set of capacitive digital-to-analogue converter, CDAC, units for carrying out digital-to-analogue conversion operations to convert respective digital values into corresponding analogue values; and control circuitry, where: each CDAC unit includes an array of capacitors at least some of which are configured to be individually-switched dependent on the digital values, the capacitors configured to have nominal capacitances; a given capacitor of the array of capacitors in each of the CDAC units is a target capacitor; the set of CDAC units includes a plurality of sub-sets of CDAC units; at least one of the target capacitors per sub-set of CDAC units is a variable capacitor, controllable by the control circuitry to have any one of a plurality of nominal capacitances defined by the configuration of that capacitor.

公开(公告)号：US20230058077A1

公开(公告)日：2023-02-23

申请号：US17880417

申请日：2022-08-03

Applicant: Socionext Inc.

Inventor： Sandeep SANTHOSH KUMAR ,  Jayaraman KUMAR ,  Armin JALILI SEBARDAN ,  Martin WILSON

IPC: H03M1/06

Abstract: Analogue-to-digital converter, ADC, circuitry comprising: successive-approximation circuitry configured in a subconversion operation to draw a charge from a first voltage reference, REF1; compensation circuitry comprising at least one compensation capacitor and configured, in a precharge operation prior to the subconversion operation, to connect the at least one compensation capacitor so that the at least one compensation capacitor stores a compensation charge, and, in the subconversion operation, to connect the at least one compensation capacitor to the first voltage reference so that a charge is injected into the first voltage reference, REF1; and control circuitry, wherein: the successive-approximation circuitry and the compensation circuitry are configured such that one or more parameters defining at least one of said charges are controllable; and the control circuitry is configured to adjust at least one said parameter to adjust an extent to which the charge injected into the first voltage reference, REF1, by the compensation circuitry compensates for the charge drawn from the first voltage reference, REF1, by the successive-approximation circuitry.

公开(公告)号：US20230029901A1

公开(公告)日：2023-02-02

申请号：US17850235

申请日：2022-06-27

Applicant: Socionext Inc.

Inventor： Jayaraman KUMAR ,  Kenneth Stephen HUNT

IPC: H03M1/38

Abstract: Analogue-to-digital converter, ADC, circuitry, including: an analogue input terminal; a comparator having first and second comparator-input terminals; and successive-approximation control circuitry to apply a potential difference across the first and second comparator-input terminals based on an input voltage signal, and to control the potential difference for a series of successive approximation operations to cause the comparator to test in each successive approximation operation whether a magnitude of an analogue input voltage signal is larger or smaller than a corresponding test value, the test value for each successive approximation operation being, dependent on a comparison result generated by the comparator in the preceding approximation operation, bigger or smaller than the test value for the preceding approximation operation by a difference amount configured for that successive approximation operation.