Programmable radio transceiver
First Claim
1. A frequency synthesizer implemented as a phase-locked loop without mixers, the phase-locked loop comprising:
- a first voltage-controlled oscillator;
a second voltage-controlled oscillator;
a first resonance circuit coupled to the first voltage-controlled oscillator and adapted to produce a first tuning signal to tune a frequency range of a first frequency signal produced by the first voltage controlled oscillator;
a second resonance circuit coupled to the second voltage-controlled oscillator and adapted to produce a second tuning signal to tune a frequency range of a second frequency signal produced by the second voltage controlled oscillator;
a switch;
two cascaded divide-by-N circuits coupled to the first and second voltage-controlled oscillators via the switch, wherein the switch is operable to couple at least one of the first frequency signal and the second frequency signal to the cascaded divide-by-N circuits; and
a divide-by-M circuit coupled to the cascaded divide-by-N circuits in a feedback loop with the first and second voltage-controlled oscillators.
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Abstract
A fully integrated, programmable mixed-signal transceiver comprising a radio frequency integrated circuit (RFIC) which is frequency and protocol agnostic with digital inputs and outputs, the transceiver being programmable and configurable for multiple radio frequency bands and standards and being capable of connecting to many networks and service providers. The RFIC does not use spiral inductors and instead includes transmission line inductors allowing for improved scalability. Components of the transceiver are programmable to allow the transceiver to switch between different frequency bands of operating. Frequency switching can be accomplished though the content of digital registers coupled to the components.
249 Citations
18 Claims
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1. A frequency synthesizer implemented as a phase-locked loop without mixers, the phase-locked loop comprising:
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a first voltage-controlled oscillator; a second voltage-controlled oscillator; a first resonance circuit coupled to the first voltage-controlled oscillator and adapted to produce a first tuning signal to tune a frequency range of a first frequency signal produced by the first voltage controlled oscillator; a second resonance circuit coupled to the second voltage-controlled oscillator and adapted to produce a second tuning signal to tune a frequency range of a second frequency signal produced by the second voltage controlled oscillator; a switch; two cascaded divide-by-N circuits coupled to the first and second voltage-controlled oscillators via the switch, wherein the switch is operable to couple at least one of the first frequency signal and the second frequency signal to the cascaded divide-by-N circuits; and a divide-by-M circuit coupled to the cascaded divide-by-N circuits in a feedback loop with the first and second voltage-controlled oscillators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification