公开(公告)号：US10541089B2

公开(公告)日：2020-01-21

申请号：US15862752

申请日：2018-01-05

Applicant: STMicroelectronics (Tours) SAS

Inventor： Sylvain Charley

IPC: H01G7/06 ,  G05F5/00 ,  H03H5/12 ,  H03H7/01 ,  G01R15/16 ,  H04B1/04

Abstract: A capacitor has a variable capacitance settable by a bias voltage. A method for setting the bias voltage including the steps of: (a) injecting a constant current to bias the capacitor; (b) measuring the capacitor voltage at the end of a time interval; (c) calculating the capacitance value obtained at the end of the time interval; (d) comparing this value with a desired value; and (e) repeating steps (a) to (d) so as long as the calculated value is different from the set point value. When calculated value matches the set point value; the measured capacitor voltage is stored as a bias voltage to be applied to the capacitor for setting the variable capacitance.

公开(公告)号：US10276308B2

公开(公告)日：2019-04-30

申请号：US15812438

申请日：2017-11-14

Applicant: STMicroelectronics (Tours) SAS

Inventor： Sylvain Charley

IPC: H01G7/00 ,  H03H11/48

Abstract: A circuit for controlling a capacitor having a capacitance adjustable by biasing, including an amplifier for delivering a D.C. bias voltage, having a feedback slowed down by a resistive and capacitive cell.

公开(公告)号：US10103705B2

公开(公告)日：2018-10-16

申请号：US14632981

申请日：2015-02-26

Applicant: STMicroelectronics (Tours) SAS

Inventor： Sylvain Charley ,  Aline Noire

IPC: H02M3/06 ,  H03H7/38 ,  H01G7/06 ,  H03H5/12 ,  H01G4/38

Abstract: A capacitor having a capacitance settable by biasing, including: a series association of a plurality of first capacitive elements between two first terminals defining the capacitor electrodes; and two second terminals of application of bias voltages respectively connected, via resistive elements, to the opposite electrodes of each of the first capacitive elements.

公开(公告)号：US09859843B2

公开(公告)日：2018-01-02

申请号：US15252868

申请日：2016-08-31

Applicant: STMicroelectronics (Tours) SAS

Inventor： Sylvain Charley ,  Jerome Heurtier ,  Laurent Jeuffrault

IPC: H03B5/20 ,  H03L7/107 ,  H01G7/06 ,  H03B5/12

CPC classification number: H03B5/20 ,  H01G7/06 ,  H03B5/124 ,  H03B2201/011 ,  H03L7/1075

Abstract: A first capacitor has a capacitance adjustable to a set point value by application of a bias voltage. A second capacitor also has a capacitance adjustable to a set point value by application of a bias voltage. The first and second capacitors are arranged to receive the same bias voltage generated by a control circuit. The control circuit receiving the set point value as an input and generates that bias voltage in response to a quantity representative of a capacitance of the second capacitor.