Trainable RF transmitter having expanded learning capabilities
First Claim
1. A trainable transmitter for learning the characteristics of a received RF signal and for transmitting a modulated RF signal having the learned characteristics to a remote device, said trainable transmitter comprising:
- a receiver for receiving an RF signal;
a controller coupled to said receiver for determining whether the received RF signal is FM or amplitude modulated, identifying the characteristics of the received RF signal including an RF carrier frequency and data code as well as an indication whether the received RF signal is frequency or amplitude modulated, and storing the identified signal characteristics; and
a transmitting circuit coupled to said controller for receiving the stored signal characteristics and for generating and transmitting a modulated RF signal having the learned signal characteristics.
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0 Petitions
Accused Products
Abstract
A trainable transmitter is described that is capable of learning and replicating both AM and FM signals. The trainable transmitter also has the capacity to learn and replicate RF signals in both the 27 MHz to 40 MHz and the 250 MHz to 450 MHz frequency bands commonly used in European garage door openers. The trainable transmitter allows an individual to input an identification of the country in which the trainable transmitter will be operated such that the trainable transmitter may then transmit the learned signals at the maximum levels permitted for the identified county.
284 Citations
25 Claims
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1. A trainable transmitter for learning the characteristics of a received RF signal and for transmitting a modulated RF signal having the learned characteristics to a remote device, said trainable transmitter comprising:
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a receiver for receiving an RF signal; a controller coupled to said receiver for determining whether the received RF signal is FM or amplitude modulated, identifying the characteristics of the received RF signal including an RF carrier frequency and data code as well as an indication whether the received RF signal is frequency or amplitude modulated, and storing the identified signal characteristics; and a transmitting circuit coupled to said controller for receiving the stored signal characteristics and for generating and transmitting a modulated RF signal having the learned signal characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A trainable transmitter for learning the characteristics of a received RF signal and for subsequently transmitting a modulated RF signal having the learned characteristics to a remote device, said trainable transmitter comprising:
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a receiver for receiving an FM RF signal; a controller coupled to said receiver for identifying and storing signal characteristics including the RF carrier frequency and code of the received FM RF signal; and a transmitting circuit coupled to said controller for receiving the stored signal characteristics and for generating and transmitting an FM RF signal having the learned signal characteristics. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A trainable transmitter for learning and transmitting an activation signal that includes an RF carrier frequency modulated with a code, said trainable transmitter comprising:
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a receiver for receiving an activation signal; a memory having a plurality of sets of amplitude control data stored therein, each set of amplitude control data including amplitude control data representing different permissible amplitude levels for one of a plurality of different countries; means for selecting one of said sets of amplitude control data based upon the country in which the trainable transmitter is to be operated; a controller operable in a learning and an operating mode, said controller coupled to said receiver for generating and storing data corresponding to the RF carrier frequency and code of the received activation signal when in the learning mode, and, when in the operating mode, said controller provides output data which identifies the RF carrier frequency and code of the received activation signal and amplitude control data read from the selected set of amplitude control data stored in said memory; a signal generator coupled to said controller for receiving output data and generating a modulated RF carrier signal representing the received activation signal; and an amplitude control circuit coupled to said signal generator and to said controller for receiving amplitude control data from said controller to selectively control the amplitude of the modulated RF carrier signal received from said signal generator at an amplitude level indicated by the received amplitude control data, and for transmitting an amplitude-controlled output signal. - View Dependent Claims (21, 22)
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23. A trainable transmitter for learning the characteristics of a received RF signal and for transmitting a modulated RF signal having the learned characteristics to a remote device, said trainable transmitter comprising:
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a receiver for receiving an RF signal having an RF carrier frequency within one of a first frequency band and a second frequency band, said second frequency band having lower frequencies than said first frequency band; a controller coupled to said receiver for determining whether the RF carrier frequency of the received RF signal is within said first frequency band or said second frequency band, and for identifying and storing the characteristics of the received RF signal including the RF carrier frequency and code; and a signal generating circuit coupled to said controller for receiving the stored signal characteristics and for generating and transmitting from an output terminal thereof, a modulated RF signal having the learned signal characteristics, said signal generating circuit including; a variable frequency oscillator for generating a carrier signal having a selected frequency within said first frequency band, and a frequency divider coupled between an output of said oscillator and said output terminal of said signal generating circuit for selectively dividing the frequency of the carrier signal generated by said oscillator to provide a carrier signal having a selected frequency within said second frequency band. - View Dependent Claims (24, 25)
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Specification