专利名称：Current source
发明人：Wright, Michael E.
申请号：EP91116731.0alertpay
申请日：19911001
公开号：EP0481277A3
vaka公开日：
完美的英文单词nth19930113
战国策翻译
新生儿护理
专利内容由知识产权出版社提供
专利附图：
摘要：A Safe Operating Area (SOA) circuit is constructed including a synthetic large value resistor that is an active current source who output current is related to the power supply voltage, and who absolute value may be arbitrarily low. A piece-wi current source is provided which includes means for generating one or more control
the internshipvoltages in order to control the level of output current in respon to the input voltage. In one embodiment, each of the control signal means includes feedback means and a summing node, so that one or more functions are performed using a control signal as an input, with the result fed back to the summing node. In this manner, a complex function can easily be provided for controlling the magnitude of the output current. In one embodiment, the one or more control signals are provided by one or more saturating current mirrors in order to limit the output current made available. The saturating current mirror compris a bipolar transistor having a plurality of collectors, one of the collectors rving to provide the output current, and one or more collectors connected to circuit elements which have current characteristics with respect to the input voltage. In another embodiment, the bipolar transistor having a plurality of collectors is replaced by a plurality of MOS transistors, having channel widths of desired ratios in order to provide a desired transfer function.
申请人：NATIONAL SEMICONDUCTOR CORPORATION
cnn是什么意思地址：2900 Semiconductor Drive P.O. Box 58090 Santa Clara California 95051-8090 US 国籍：US
代理机构：Sparing Röhl Henler Patentanwälte清明节的英文
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