发明名称 |
Lernfähiger Sendeempfänger |
摘要 |
A trainable transceiver for learning and transmitting an activation signal that includes an RF carrier frequency modulated with a code for remotely actuating a device, such as a garage door opener. In one embodiment, the trainable transceiver preferably includes a controller, a signal generator, and a dynamically tunable antenna having a variable impedance that may be selectively controlled in accordance with a carrier frequency of a received or transmitted activation signal. In another embodiment, the trainable transceiver preferably includes a phase-locked loop circuit for providing a frequency control voltage to a signal generator to selectively adjust the carrier frequency of the signal generator. In yet another embodiment, the trainable transceiver includes an amplifying circuit for selectively controlling the gain of a modulated radio frequency carrier signal received from the signal generator and for transmitting an amplified output signal to the remotely actuated device. In a further embodiment, the trainable transceiver includes a frequency table including a list of frequencies for remote transmitters known to transmit for only a short duration and the trainable transceiver first reads the short duration frequencies from the frequency table. Some embodiments will include one or more of these various features. |
申请公布号 |
DE19619715(A1) |
申请公布日期 |
1996.11.21 |
申请号 |
DE1996119715 |
申请日期 |
1996.05.15 |
申请人 |
PRINCE CORP., HOLLAND, MICH., US |
发明人 |
DUCKWORTH, PAUL C., HOLLAND, MICH., US;DYKEMA, KURT A., HOLLAND, MICH., US |
分类号 |
H03L7/18;E05F15/20;G08C17/02;G08C19/28;H04B1/38;(IPC1-7):H04Q9/00;H03L7/06;H04B1/59;H03J9/00;E05B47/04 |
主分类号 |
H03L7/18 |
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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