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1. WO2022008864 - DRIVER CIRCUITRY FOR CAPACITIVE TRANSDUCERS

Publication Number WO/2022/008864
Publication Date 13.01.2022
International Application No. PCT/GB2021/051366
International Filing Date 03.06.2021
IPC
H04R 3/00 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3Circuits for transducers
H04R 17/00 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
17Piezo-electric transducers; Electrostrictive transducers
H04R 19/00 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
19Electrostatic transducers
H01L 41/04 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
41Piezo-electric devices in general; Electrostrictive devices in general; Magnetostrictive devices in general; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
02Details
04of piezo-electric or electrostrictive elements
Applicants
  • CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LIMITED [GB]/[GB]
Inventors
  • LESSO, John Paul
  • IDO, Toru
Agents
  • HASELTINE LAKE KEMPNER LLP
Priority Data
16/921,36906.07.2020US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) DRIVER CIRCUITRY FOR CAPACITIVE TRANSDUCERS
(FR) ENSEMBLE DE CIRCUITS PILOTES POUR TRANSDUCTEURS CAPACITIFS
Abstract
(EN) The present disclosure relates to driver circuitry (200) for driving a capacitive transducer (210), e.g., a piezoelectric transducer or an electrostatic transducer. The circuitry (200) comprises: a power supply (260); a reservoir capacitance (220); switch network circuitry (240); and control circuitry (270). The control circuitry (270) is configured to control operation of the switch network circuitry (240) so as to charge the reservoir capacitance (220) from the power supply (260) and to transfer charge between the reservoir capacitance (220) and the capacitive transducer (210).
(FR) La présente divulgation concerne un ensemble de circuits pilotes (200) pour le pilotage d'un transducteur capacitif (210), p. ex. un transducteur piézoélectrique ou un transducteur électrostatique. L'ensemble de circuits (200) comprend : une alimentation électrique (260) ; une capacité de réserve (220) ; un ensemble de circuits de réseau de commutation (240) ; et un ensemble de circuits de commande (270). L'ensemble de circuits de commande (270) est conçu pour commander le fonctionnement de l'ensemble de circuits de réseau de commutation (240) de façon à charger la capacité de réserve (220) à partir de l'alimentation électrique (260), et à transférer la charge entre la capacité de réserve (220) et le transducteur capacitif (210).
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