A charge pump circuit with negative current feed back is disclosed. The charge pump circuit consists of charge pump stages, switch circuits in between the stages, and a feedback loop to control the conductivity of the switch circuit. The conductivity of the switch circuits is controlled by modulating...http://www.google.com.tw/patents/US5717581?utm_source=gb-gplus-share專利 US5717581 - Charge pump circuit with feedback control
