Phase/frequency tracking transceiver
AssigneeCypress Semiconductor Corporation
InventorIoannis Syllaios
Life of this patent
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Abstract
A radio frequency (RF) transceiver includes a reference signal source to generate a reference signal, a local RF source to generate a local RF signal and a mixed-signal phase/frequency detector to compare the reference signal to the local RF signal, and to generate a difference signal from the comparison, wherein the difference signal comprises a modulation component and an error component. The transceiver also includes a receiver front end to receive and downconverts an angle-modulated RF signal to a baseband signal, a quadrature modulator configured to angle-modulate the reference signal source with the baseband signal.
Claims24
A radio frequency (RF) transceiver, comprising:
- a reference signal source configured to generate a reference signal;
- a local RF source configured to generate a local RF signal;
- and
- a mixed-signal phase/frequency detector configured to compare the reference signal to the local RF signal, and to generate a difference signal from the comparison, wherein the difference signal comprises a modulation component and an error component.
A method in a radio frequency transceiver, comprising:
- comparing a reference signal from a reference source to a local radio frequency (RF) signal in a mixed-signal phase/frequency detector;
- generating a difference signal from the comparison, the difference signal comprising a modulation component and an error component;
- and
- phase-locking the local RF signal to the reference signal with the error component to perform angle demodulation for RF receiving and angle modulation for RF transmitting.
A system, comprising:
- a radio frequency (RF) transceiver, comprising:
- a reference signal source configured to generate a reference signal;
- a local RF source configured to generate a local RF signal;
- and
- a mixed-signal phase/frequency detector configured to compare the reference signal to the local RF signal, and to generate a difference signal from the comparison, wherein the difference signal comprises a modulation component and an error component;
- and
- an antenna coupled with the RF transceiver to transmit and receive angle-modulated RF signals.
Dependencies are inferred from the claim text.