 Communication device |
| The object on which the invention is based is to provide a highly integrated mobile communication ... |
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| Information terminal unit |
| To the end, according to a first aspect of the present invention, there is provided a portable ... |
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| Portable information communication terminal, entertainment system, and storage medium |
| It is therefore an object of the present invention to provide a portable information communication ... |
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| Portable telecommunication apparatus for controlling an electronic utility device |
| It is an object of the present invention to provide an easier way of accessing, controlling and ... |
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| Karaoke service method and system by telecommunication system |
| Therefore, it is an object of the present invention, for the purpose of solving the above mentioned ... |
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| Massage device applying variable-frequency vibration in a variable pulse sequence |
| In accordance with one aspect of the invention, there is provided a vibrating massager including a ... |
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| Vibro-tactile alert and massaging system having directionally oriented stimuli |
| What is claimed is: 1. A tactile alert system for an occupant support structure, comprising: (a) a ... |
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| Infrared transceiver module for a wider working range |
| The object of the invention is to provide an infrared transceiver module having a wider working ... |
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| Radio telephone system for calling a party at predetermined invervals until a response is received |
| In view of the above respect, it is an object of the present invention to provide a radio telephone ... |
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Transceiver with closed loop control of antenna tuning and power level
| Details |
Inventors: Blaker, David; Cardwell, Matthew; Duckworth, Paul; Honeck, Brian;
Assignee: Johnson Controls Technology Company (Plymouth, MI)
Primary Examiner: Urban; Edward F.
Assistant Examiner: Jackson; Blane J.
Attorney, Agent or Firm: Foley & Lardner LLP
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. 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 detector circuit signal. The detector circuit provides a measurement of the transmission power and is also used to vary the applied transmission power of the transceiver in response to operating and environmental parameters. |
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DETAILED DESCRIPTION According to one aspect of the present invention, a trainable transceiver is provided that efficiently transmits and receives RF signals at various frequencies.
Another aspect of the present invention is to provide a trainable transceiver capable of dynamically tuning an antenna for maximum efficiency at all frequencies of use.
A further aspect of the present invention is to detect the RF voltage or power level of the transmission on the antenna and adjust it with reference to on-time characteristics or other variables.
To achieve these and other advantages, and in accordance with the purpose of the invention as embodied and described herein, the trainable transceiver of the present invention includes a dynamically tunable antenna, a controller, a power level sense or detector circuit, and a signal generator.
In operation, the transceiver of the present invention receives and records an activation signal from an existing remote transmitter and transmits the previously encoded modulated radio frequency carrier signal provided by the signal generator.
The controller is coupled to antennas and has two modes of operation: a learning mode and an operating mode.
In the learning mode, the controller receives the activation signal from the receiving antenna for storing data corresponding to the radio frequency, modulation scheme, and code of the activation signal.
In the operating mode, the controller provides output data, which identifies the radio frequency and code of the received activation signal.
Additionally, the controller further provides an antenna control signal electrically coupled to the control input of the dynamically tunable antenna in order to selectively control the resonance frequency of the dynamically tunable antenna to maximize the transmission efficiency of the antenna.
The signal generator is coupled to the controller and the dynamically tunable antenna and is used for transmitting an encoded modulated radio frequency carrier signal, which corresponds to the received activation signal, from the receiving antenna
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Ring Tones 
