Method and apparatus for transmitter for universal garage door opener
First Claim
1. A universal remote control radio frequency (RF) transmitter having a power output level, the transmitter for selective actuation of one of a plurality of receiver units, each receiver unit receiving a particular carrier frequency modulated according to a particular modulation code, the universal remote control transmitter comprising in operative combination:
- a) a first switching unit including a plurality of switches, each switch having at least three user selectable settings, the switches of the first switching unit set by the user to a selected one of a plurality of combinations of settings, each combination corresponding to one of a plurality of modulation codes;
b) a second switching unit having a plurality of user selectable settings, a particular second switching unit setting set by the user to select one of a plurality of possible carrier frequencies;
c) transmitter circuit means for transmitting a carrier frequency by transmitting the selected one of the plurality of possible carrier frequencies; and
d) controller means responsive to the first switching unit for selective actuation and modulation of the transmitter circuit means, the controller means comprising;
(i) means responsive to selected switch settings of the first switching unit for outputting a modulation signal corresponding to the modulation code for modulating the carrier frequency, and(ii) means responsive to the particular second switching unit setting for activating the transmitter circuit means to transmit the selected one of the plurality of possible carrier frequencies.
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Abstract
A universal remote control transmitter for use with garage door openers including a number of switches whereby a user can program a transmitted modulation format and carrier frequency, and a controller for scanning the switches to determine the user programmed selections. The controller, in response to the programmed selections, outputs the required modulation to a selected transmitter, as well as direction to fine tune the transmitter to the particular carrier frequency. Also included is a power sensor circuit that responds to a change in power supply voltage by adjusting the modulation to maintain a constant peak transmitter output power.
68 Citations
4 Claims
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1. A universal remote control radio frequency (RF) transmitter having a power output level, the transmitter for selective actuation of one of a plurality of receiver units, each receiver unit receiving a particular carrier frequency modulated according to a particular modulation code, the universal remote control transmitter comprising in operative combination:
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a) a first switching unit including a plurality of switches, each switch having at least three user selectable settings, the switches of the first switching unit set by the user to a selected one of a plurality of combinations of settings, each combination corresponding to one of a plurality of modulation codes; b) a second switching unit having a plurality of user selectable settings, a particular second switching unit setting set by the user to select one of a plurality of possible carrier frequencies; c) transmitter circuit means for transmitting a carrier frequency by transmitting the selected one of the plurality of possible carrier frequencies; and d) controller means responsive to the first switching unit for selective actuation and modulation of the transmitter circuit means, the controller means comprising; (i) means responsive to selected switch settings of the first switching unit for outputting a modulation signal corresponding to the modulation code for modulating the carrier frequency, and (ii) means responsive to the particular second switching unit setting for activating the transmitter circuit means to transmit the selected one of the plurality of possible carrier frequencies. - View Dependent Claims (2, 3, 4)
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Specification