Invention Grant
- Patent Title: Speaker driver circuit driven by positive and negative voltages
- Patent Title (中): 扬声器驱动电路由正负电压驱动
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Application No.: US12507060Application Date: 2009-07-21
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Publication No.: US08411879B2Publication Date: 2013-04-02
- Inventor: Jwin-Yen Guo , Ching-Hsiang Yang
- Applicant: Jwin-Yen Guo , Ching-Hsiang Yang
- Applicant Address: TW Hsin-Chu
- Assignee: Richtek Technology Corporation
- Current Assignee: Richtek Technology Corporation
- Current Assignee Address: TW Hsin-Chu
- Agency: Tung & Associates
- Main IPC: H03F99/00
- IPC: H03F99/00 ; H03F3/04 ; H04R1/10
Abstract:
A speaker driver circuit driven by positive and negative voltages, comprising: at least one operational amplifier providing an output to a headphone speaker, and a voltage converter receiving a supplied voltage (VDD), generating r-fold positive and negative voltages (r·VDD and −r·VDD, wherein r is any positive real number except 1) according to the supplied voltage, and supplying the positive and negative voltages to the operational amplifier for its high and low operation voltage levels respectively.
Public/Granted literature
- US20090285416A1 Speaker Driver Circuit Driven By Postive and Negative Voltages Public/Granted day:2009-11-19
Information query
