Wireless transmit-only apparatus and method

A wireless transmit-only apparatus comprising:

• a controller having a transmission frequency selection output;
• and
• a wireless transmitter having a phase locked loop, which phase locked loop is responsive to the transmission frequency selection output;
• wherein:
• the wireless transmit-only apparatus can selectively transmit at a plurality of different frequencies as selected by the controller and effected, at least in part, by the phase locked loop;
• the wireless transmit-only apparatus further comprises a user interface comprising at least one independently assertable input and wherein the controller is operably responsive to the at least one independently assertable input;
• the user interface comprises a plurality of independently assertable inputs and wherein the controller is operably responsive to the plurality of independently assertable inputs;
• and
• the phase locked loop has a PLL control input that operably couples to a plurality of selectively switchable mechanically resonant devices.

A wireless transmit-only apparatus comprising:

• a controller having a transmission frequency selection output;
• and
• a wireless transmitter having a phase locked loop, which phase locked loop is responsive to the transmission frequency selection output;
• wherein:
• the wireless transmit-only apparatus can selectively transmit at a plurality of different frequencies as selected by the controller and effected, at least in part, by the phase locked loop;
• the controller comprises control means for selecting a particular output frequency, from a plurality of available output frequencies, that the phase locked loop will provide;
• the control means is further for selecting a particular resonant circuit from amongst a plurality of candidate resonant circuits to couple to a set divide input of the phase locked loop;
• and
• the plurality of candidate resonant circuits comprise a plurality of mechanically resonant devices.

A method of selecting a transmission frequency for a transmit-only wireless apparatus, comprising:

• providing a transmitter having a phase locked loop that has a plurality of selectable output frequencies;
• selecting one of the plurality of selectable output frequencies to provide a selected frequency;
• and
• using the selected frequency as the transmission frequency for the transmit-only wireless apparatus;
• wherein:
• the method further comprises providing a transmitter having a phase locked loop that has a plurality of selectable output frequencies comprises providing a transmitter having a phase locked loop having a PLL control input;
• selecting one of the plurality of selectable output frequencies to provide a selected frequency comprises selecting one of a plurality of resonant elements to operably couple to the PLL control input;
• and
• selecting one of a plurality of resonant elements comprises selecting one of a plurality of resonant elements that include at least one mechanically resonant element.

A method of selecting a transmission frequency for a transmit-only wireless apparatus, comprising:

• providing a transmitter having a phase locked loop that has a plurality of selectable output frequencies;
• selecting one of the plurality of selectable output frequencies to provide a selected frequency;
• and
• using the selected frequency as the transmission frequency for the transmit-only wireless apparatus;
• wherein:
• providing a transmitter having a phase locked loop that has a plurality of selectable output frequencies comprises providing a transmitter having a phase locked loop having a PLL control input;
• selecting one of the plurality of selectable output frequencies to provide a selected frequency comprises selecting one of a plurality of oscillators;
• and
• selecting one of a plurality of oscillators comprises selecting one of a plurality of oscillators wherein each of the plurality of oscillators has a different mechanically resonant element.