초록 ▼

A radio frequency transmitter for use in generating coded commands learned from received coded radio frequency signals. An transceiver circuit including a switching element and a tunable filter tuning element is coupled to a programmable controller, e.g, a microprocessor. The programmable controller

A radio frequency transmitter for use in generating coded commands learned from received coded radio frequency signals. An transceiver circuit including a switching element and a tunable filter tuning element is coupled to a programmable controller, e.g, a microprocessor. The programmable controller operates the switching element of said transceiver circuit in either a first or a second mode for receiving or transmitting coded radio frequency signals, respectively via an antenna coupled to the tuning element. The switching element is operable in the first mode to demodulate received coded radio frequency signals, and the programmable controller learns the received coded radio frequency signals and stores coded commands in memory. In the second mode of operation, an oscillator is modulated by generated coded signals from the programmable controller using the stored coded commands from memory. The generation of plural coded radio frequency commands with the single radio frequency transmitter unit facilitates the learning, responsive to a received radio frequency signal, of an additional coded radio frequency command for additional door and gate operators.

대표청구항 ▼

[ What is claimed is:] [1.] A radio frequency transmitter unit for generating commands learned from received coded radio frequency signals, comprising:a plurality of transceiver circuits;a plurality of antennas, one each being coupled to one of said transceiver circuits;a programmable controller cou

[ What is claimed is:] [1.] A radio frequency transmitter unit for generating commands learned from received coded radio frequency signals, comprising:a plurality of transceiver circuits;a plurality of antennas, one each being coupled to one of said transceiver circuits;a programmable controller coupled to each of said plural transceiver circuits for selectively operating at least one of said transceiver circuits in a first mode of operation for demodulating received coded radio frequency signals from the antenna coupled thereto, the at least one transceiver circuit being operated as a wide-band receiver:a memory device connected to said programmable controller, said programmable controller being responsive to the demodulated signals for storing received signals in said memory device;a user interface with said programmable controller for selectively operating at least one of said transceiver circuits in a second mode of operation for modulating operation of selected transceiver circuits to cause the transceiver circuit to be modulated with signals generated by the programmable controller from said memory device; andsaid antenna being operable with the transceiver circuit for radio frequency transmission of the signals generated by the programmable controller from said memory in said second mode of operation, upon which said user interface facilitates user interaction to verify the radio frequency transmission.