发明名称 |
Electronic bipolar interface circuit |
摘要 |
An electronic bipolar interface driver circuit for interconnecting a microprocessor to an electromagnetic relay load. The driver circuit includes a peripheral adapter circuit having a pair of outputs connected to a respective one of the two inputs of a pair of NAND gates. A source of square-wave signals connected to the other inputs of the two input NAND gates so that a.c. signals are supplied to one of two switching amplifiers. The a.c. signals are transformer-coupled to a pair of rectifiers. The rectified d.c. voltage is supplied to either one of two switching transistors which establishes a given polarity of voltage on a pair of output terminals and which illuminates one of two optical couplers to feedback a checking signal to the peripheral adapter circuit to verify the polarity of the voltage on the output terminals.
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申请公布号 |
US4763017(A) |
申请公布日期 |
1988.08.09 |
申请号 |
US19850789900 |
申请日期 |
1985.10.21 |
申请人 |
AMERICAN STANDARD INC. |
发明人 |
CAMPBELL, RICHARD D.;DARROW, JOHN O. G. |
分类号 |
H03K3/286;H03K17/18;H03K17/60;H03K17/62;H03K17/795;(IPC1-7):G05B11/12;H03K17/00 |
主分类号 |
H03K3/286 |
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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