Wireless transmit-only apparatus and method
First Claim
Patent Images
1. 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; and
the phase locked loop has a PLL control input that operably couples to a plurality of selectively switchable mechanically resonant devices.
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Accused Products
Abstract
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.
30 Citations
12 Claims
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1. A wireless transmit-only apparatus comprising:
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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; and the phase locked loop has a PLL control input that operably couples to a plurality of selectively switchable mechanically resonant devices. - View Dependent Claims (2, 3)
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4. A wireless transmit-only apparatus comprising:
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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. - View Dependent Claims (5, 6)
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7. A wireless transmit-only apparatus comprising:
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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. - View Dependent Claims (8, 9)
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10. A method of selecting a transmission frequency for a transmit-only wireless apparatus, comprising:
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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. - View Dependent Claims (11)
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12. A method of selecting a transmission frequency for a transmit-only wireless apparatus, comprising:
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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.
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Specification