发明授权
- 专利标题： Power supply dependent method of controlling a charge pump
- 专利标题（中）： 电源依赖的控制电荷泵的方法
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申请号： US511421申请日： 1995-08-04
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公开(公告)号： US5537077A公开(公告)日： 1996-07-16
- 发明人: Paul G. Schnizlein
- 申请人： Paul G. Schnizlein
- 申请人地址： CA Sunnyvale
- 专利权人： Advanced Micro Devices, Inc.
- 当前专利权人： Advanced Micro Devices, Inc.
- 当前专利权人地址： CA Sunnyvale
- 主分类号： G01R19/165
- IPC分类号： G01R19/165 ; G05F3/30 ; G10H1/18 ; G10H7/02 ; H03K19/00 ; H03K19/0175 ; H03L5/00
摘要：
A supply voltage detect circuit is described which generates a control signal indicating the status of VCC to be at 5.0 or 3.3 volts. This control signal is used to generate analog reference signals used by A/D and/or D/A circuitry in an audio processing integrated circuit and by other circuitry to control clock frequencies or current drive.
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