英语口语学习培训专利名称：Current mirror circuit 发明人：Cytera, Christopher
unionid申请号：EP90306320.4
申请日：19900611
一辈子的英文公开号：EP0403195B1
公开日：
rotte
nice什么意思
19940824
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摘要：A current mirror circuit has an actively controllable feedback element in the form of a p-channel field effect transistor (28). The p-channel transistor 28 has its gate connected to the output of a differential amplifier (12). The opamp 12 is connected to form a feedback loop within the current mirror circuit. The negative input (14) of the opamp (12) is connected to receive at node (16) the drain voltage V1 of the first transistor (24). The positive input (18) of the opamp (12) is connected to receive at node (20) the drain voltage (V2) of the cond transistor (26). The purpo of the opamp 12 is to tend to equali the drain voltages V1 and V2 of the first and cond transistors 24, 26. If the drain voltage V2 of the cond transistor 26 increas relative to the drain voltage V1 of the first transistor 24 the output signal Vo of the opamp 12 will be such as to reduce Vgs of the transistor 28 and hence Ids thereby to reduce the drain voltage V2 of the cond transistor 26. If the drain voltage V2 of the cond transistor 26 falls below the drain voltage V1 of the first transistor 24 the output signal of the opamp 12 will be such as to increa Vgs of the transistor 20, and hence Ids thereby to allow the drain voltage V2 of the cond transistor 26 to ri. In this way the nodes 16 and 20 are continuously biad equal.
lf diagnostic申请人：INMOS LTD
num地址：GB
奖品
国籍：GB
代理机构：Driver, Virginia Rozanne 更多信息请下载全文后查看
