发明授权
- 专利标题： Speaker driver circuit driven by positive and negative voltages
- 专利标题（中）： 扬声器驱动电路由正负电压驱动
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申请号： US12507060申请日： 2009-07-21
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公开(公告)号： US08411879B2公开(公告)日： 2013-04-02
- 发明人: Jwin-Yen Guo , Ching-Hsiang Yang
- 申请人： Jwin-Yen Guo , Ching-Hsiang Yang
- 申请人地址： TW Hsin-Chu
- 专利权人： Richtek Technology Corporation
- 当前专利权人： Richtek Technology Corporation
- 当前专利权人地址： TW Hsin-Chu
- 代理机构： Tung & Associates
- 主分类号： H03F99/00
- IPC分类号： H03F99/00 ; H03F3/04 ; H04R1/10
摘要：
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.
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