LOW POWER, INTEGRATED RADIO TRANSMITTER AND RECEIVER
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Abstract
A low power (optionally, self-powered) integrated transceiver using on-chip antennas is provided. The transmitter and receiver utilize phase-locked loops (PLLs) which initially, in a closed-loop state, pre-tune (i.e. phase-lock) voltage controlled oscillators (VCOs) before opening the loops to allow them to transmit and receive data. The TX, in the opened-loop state, disables the loop components while (FM) modulating the VCO. The RX, in the opened-loop state, injection-locks the VCO with the incoming (FM) modulated signal while the remaining loop components serve to demodulate the signal. For both the TX and RX an integrated antenna can be used and, advantageously, the TX comprises a dual purpose inductor which functions as both an inductor in the voltage-controlled oscillator (i.e. in the resonant tank thereof) and the integrated antenna.
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Citations
25 Claims
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1-4. -4. (canceled)
- 5. Radio frequency (RF) receiver circuitry for receiving an input data modulated signal, said receiver circuitry comprising a phase-locked loop (PLL) having a voltage-controlled oscillator (VCO), wherein said phase-locked loop, in a closed-loop state, phase-locks said voltage-controlled oscillator to provide a VCO output signal having a frequency that is a multiple of a frequency reference and wherein, when said phase-locked loop is in an opened-loop state, said voltage-controlled oscillator is injection-locked by said input data modulated signal.
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10. (canceled)
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12. An integrated transceiver comprising:
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radio frequency (RF) receiver circuitry for receiving an input data modulated signal, said receiver circuitry comprising a first phase-locked loop (PLL) having a first voltage-controlled oscillator (VCO), wherein said first phase-locked loop, in a closed-loop state, phase-locks said first voltage-controlled oscillator to provide a VCO output signal having a frequency that is a multiple of a first frequency reference and wherein, when said first phase-locked loop is in an opened-loop state, said first voltage-controlled oscillator is injection-locked by said input data modulated signal; and radio frequency (RF) transmitter circuitry for transmitting an output data modulated signal, said transmitter circuitry comprising a second phase-locked loop (PLL) having a second voltage-controlled oscillator (VCO) and configured for open-loop direct VCO modulation, wherein said second phase-locked loop, in a closed-loop state, phase-locks said second voltage-controlled oscillator to provide a VCO output signal having a frequency that is a multiple of a second frequency reference and wherein, when said second phase-locked loop is in an opened-loop state, said second phase-locked loop is configured for modulation of said second voltage-controlled oscillator by a data signal to generate said output data modulated signal, wherein one or more components of said second phase-locked loop, other than said second voltage-controlled oscillator, are disabled to save power when said second phase-locked loop is in said opened-loop state. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method comprising:
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alternating between a closed-loop state and an opened-loop state of a first phase-locked loop comprising a first voltage-controlled oscillator; in a closed-loop state of the first phase-locked loop, phase-locking said first voltage-controlled oscillator to provide a first VCO output signal having a frequency that is a multiple of a first frequency reference; and in the opened-loop state of the first phase-locked loop; receiving an input data modulated signal; and injection-locking said first voltage-controlled oscillator with said input data modulated signal. - View Dependent Claims (24, 25)
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Specification