WO2024016146 - DRIVING CIRCUIT AND METHOD FOR DRIVING CAPACITIVE LOAD, AND SPEAKER DEVICE AND ELECTRONIC DEVICE INCLUDING DRIVING CIRCUIT
National phase entry:
Publication Number
WO/2024/016146
Publication Date
25.01.2024
International Application No.
PCT/CN2022/106403
International Filing Date
19.07.2022
Title **
[English]
DRIVING CIRCUIT AND METHOD FOR DRIVING CAPACITIVE LOAD, AND SPEAKER DEVICE AND ELECTRONIC DEVICE INCLUDING DRIVING CIRCUIT
[French]
CIRCUIT D'ATTAQUE ET PROCÉDÉ DE COMMANDE D'UNE CHARGE CAPACITIVE, ET DISPOSITIF DE HAUT-PARLEUR ET DISPOSITIF ÉLECTRONIQUE COMPRENANT UN CIRCUIT D'ATTAQUE
Applicants **
HUAWEI TECHNOLOGIES CO., LTD.
Inventors
HARADA, Yosuke
OURA, Takao
TSUNODA, Naotaka
LI, Xiansheng
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
| Number of Priorities | * |
| Number of Multi-Dependent Claims | * |
| Number of Drawings | * |
| Pages for Publication | * |
| Number of Pages with Drawings | * |
| Pages of Specification | * |
| * | |
| Number of Office Actions | * |
| * | |
International Searching Authority |
CNIPA
* |
| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
* |
| Type of Assignment |
The Standard Agent's Assignment
* |
| Applicant's Legal Status |
Legal Entity
* |
| * | |
| * | |
| * | |
| * | |
| * | |
| Entry into National Phase under |
Chapter I
* |
| Patent Delivery |
Send the Letters Patent by Courier
* |
| Translation |
|
* The data is based on automatic recognition. Please verify and amend if necessary.
** IP-Coster compiles data from publicly available sources. If this data includes your personal information, you can contact us to request its removal.
Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 1728 | |
| EPO | Filing, Examination, Granting | 12628 | |
| Japan | Filing, Examination, Granting | 2216 | |
| South Korea | Filing, Examination, Granting | 2178 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
23,490
The term for entry into the National Phase has expired. This quotation is for informational purposes only
Contact Us
Abstract[English]
An embodiment of the present disclosure provides a driving circuit for driving a capacitive load, such as a piezoelectric MEMS sound transducer. The driving circuit includes a step-up circuit configured to increase a load voltage across the capacitive load, a step-down circuit configured to decrease the load voltage, and a controller configured to receive an input signal and control the step-up circuit and the step-down circuit such that the load voltage is an amplified version of the input signal. The driving circuit further includes an energy storage configured to store electric energy discharged from the capacitive load. The step-up circuit is electrically connected between a power supply and the capacitive load, and the step-down circuit is electrically connected between the capacitive load and the energy storage. The energy storage is separated from the power supply.[French]
Un mode de réalisation de la présente divulgation concerne un circuit d'attaque qui permet de piloter une charge capacitive, telle qu'un transducteur acoustique MEMS piézoélectrique. Le circuit d'attaque comprend un circuit élévateur configuré pour augmenter une tension de charge à travers la charge capacitive, un circuit abaisseur configuré pour diminuer la tension de charge, et un dispositif de commande configuré pour recevoir un signal d'entrée et commander le circuit élévateur et le circuit abaisseur de manière à ce que la tension de charge soit une version amplifiée du signal d'entrée. Le circuit d'attaque comprend en outre un dispositif de stockage d'énergie configuré pour stocker l'énergie électrique déchargée de la charge capacitive. Le circuit élévateur est électriquement connecté entre une alimentation électrique et la charge capacitive, et le circuit abaisseur est électriquement connecté entre la charge capacitive et le dispositif de stockage d'énergie. Le dispositif de stockage d'énergie est séparé de l'alimentation électrique.