H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/02 (2006.01) G07C 9/00 (2006.01) G08C 17/00 (2006.01) G08C 17/02 (2006.01) H04B 1/04 (2006.01) H04B 7/00 (2006.01) H03L 7/06 (2006.01)
Patent
CA 2477028
A wireless transmit-only apparatus (20) has a controller (21) that responds to a user interface 25 by correlating specific user input with a corresponding characterizing transmission parameter(s) as is stored in a memory (35) and by selecting a corresponding resonant device (31 and 32). The latter devices serve to drive the PLL control input of a phase locked loop (23) to thereby influence the transmission carrier frequency of a wireless transmitter (22). In a preferred embodiment, at least one of the resonant devices comprises a mechanically resonant device such as a surface acoustic wave device, a crystal resonator, or a ceramic resonator.
Fitzgibbon James J.
Keller Robert Roy Jr.
Wojiak Bernard J.
Macrae & Co.
The Chamberlain Group Inc.
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