WIRELESS TRANSMIT-ONLY APPARATUS AND METHOD .

摘要

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.