Method and apparatus for transmitter for universal garage door opener
US5564101A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1995 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Jul 21, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/04
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.