发明申请
US20050127982A1 Charge pump circuit with a brief settling time and high output voltage regulation precision
有权
电荷泵电路具有短暂的稳定时间和高输出电压调节精度
- 专利标题： Charge pump circuit with a brief settling time and high output voltage regulation precision
- 专利标题（中）： 电荷泵电路具有短暂的稳定时间和高输出电压调节精度
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申请号： US10982528申请日： 2004-11-05
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公开(公告)号： US20050127982A1公开(公告)日： 2005-06-16
- 发明人: Osama Khouri , Giancarlo Ragone
- 申请人： Osama Khouri , Giancarlo Ragone
- 申请人地址： IT Agrate Brianza (MI)
- 专利权人： STMicroelectronics S.r.I.
- 当前专利权人： STMicroelectronics S.r.I.
- 当前专利权人地址： IT Agrate Brianza (MI)
- 优先权： ITRM2003A000512 20031105
- 主分类号： G05F1/10
- IPC分类号： G05F1/10 ; H02M3/07
摘要：
A circuit for converting a direct current input voltage into an output voltage greater than the input voltage. The circuit includes a charge pump and a block for generating pulse signals of a predetermined frequency to be applied to a control input of the charge pump. The settling time, i.e. the time necessary for the output voltage to attain its operating value and to maintain it with a given precision, is reduced by providing the circuit with charge injection control via modulation of the duty cycle of the pulse signals as a function of the difference between the output voltage, or a predetermined fraction thereof, and a predetermined reference voltage and in such a manner as to reduce the settling time as the difference diminishes. The circuit includes a regulator that controls the charge pump based upon the predetermined reference voltage.
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