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专利名称：MONITORING THE TEMPERATURE
DEPENDENCE OF THE EXTERNALCAPACITORS OF A CHARGE PUMP ANDIMPROVED CHARGE PUMPS BASEDTHEREON
发明人：RIEDEL, Friedbert申请号：EP05850905.0申请日：20051222公开号：EP1834399A2公开日：20070919
摘要：Apparatus (40) comprising a multistage charge pump (10) having an output (41)for connecting a load (Cout, RL). The charge pump (10) comprises m gain stages forcharging and discharging m external stage capacitors (C) in order to provide an outputvoltage (Vout) at the output (41) that is about m times higher than a supply voltage (Vdd)of the charge pump (10). The charging and discharging is influenced by switches insidesaid charge pump (10) that are controlled by a switching signal having a switchingfrequency (fosc). A monitoring circuit (20) is provided that monitors temperature-inducedchanges of the value of an external reference capacitor (Cref). Furthermore, means (30)for adjusting the switching frequency (fosc) are employed in order to compensatevariations of the gain of said charge pump (10) that are caused by the changes of thevalue of the m external stage capacitors (C).
申请人：Koninklijke Philips Electronics N.V.
地址：Groenewoudseweg 1 5621 BA Eindhoven NL
国籍：NL
代理机构：White, Andrew Gordon
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