发明名称 |
System for sensing and/or controlling the level of current in a transistor |
摘要 |
A transistor sense electrode (20) is coupled to the input branch (24) of a current mirror (22). The current mirror's branch (26) carries a current substantially equal to the current in the input branch to indicate the current flowing in the transistor. A preferred embodiment includes an amplifier (30) which senses the difference between the voltage at the sense electrode (20) and a reference voltage (Vx). The sensed difference in voltage causes the amplifier to apply a control signal to the current mirror to vary the current in the input branch so as to hold the sense electrode's voltage at the level of the reference voltage (Vx). A preferred package for the system's circuitry is also disclosed.
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申请公布号 |
US5084668(A) |
申请公布日期 |
1992.01.28 |
申请号 |
US19900534996 |
申请日期 |
1990.06.08 |
申请人 |
MOTOROLA, INC. |
发明人 |
KOTOWSKI, JEFFREY P.;CHAPMAN, BRIAN D. |
分类号 |
G05F3/26;H03K17/082 |
主分类号 |
G05F3/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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