Method and apparatus for transmitter for universal garage door o

Details Method and apparatus for transmitter for universal garage door o Method and apparatus for transmitter for universal garage door o

1995-07-21

1996-10-08

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Remote control of receiver

4551512, 34082572, H04B 104

Patent

active

055641016

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.

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