发明名称 |
Electrically programmable transceiver security system and integrated circuit |
摘要 |
An electrically programmable security system includes a receiver responsive to particular radio frequency signals which include a predetermined digital code encoded on the radio frequency signal. The receiver generates a control signal upon detecting the presence of the encoded radio frequency signal. The receiver also includes a circuit for digitally communicating the predetermined digital code on a communication link. A transmitter includes a memory for storing a digital code and a circuit for generating a radio frequency signal at the radio frequency to which said receiver is responsive. The radio frequency signal generated by the transmitter is encoded with the digital code stored in the memory. The transmitter further includes a circuit for coupling with the communication link and a circuit for inputting the predetermined digital code from the receiver unit communicated on the communication link into the memory when the communication link is coupled to the coupling circuit.
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申请公布号 |
US4859990(A) |
申请公布日期 |
1989.08.22 |
申请号 |
US19870039577 |
申请日期 |
1987.04.15 |
申请人 |
LINEAR CORPORATION |
发明人 |
ISAACMAN, MARVIN |
分类号 |
G07C1/20;G07C9/00;G08B1/08;G08B25/10 |
主分类号 |
G07C1/20 |
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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