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US 8,222,966 B2Granted
System, method and apparatus for an open loop calibrated phase wrapping phase modulator for wideband RF outphasing/polar transmitters
AssigneeIntel Corporation
InventorsAshoke Ravi, Paolo Madoglio, Marian Verhelst, Georgios Palaskas
Life of this patent
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Abstract
A device article and method for an open loop calibrated phase wrapping phase modulator. A tapped delay line may provide a coarse resolution for one or more phases of a signal. A phase multiplexer may receive one or more coarse phases from the tapped delay line and select a coarse phase to send to the digitally controlled delay line. A digitally controlled delay line may provide a fine resolution to the coarse phase from the phase multiplexer.
Claims20
A modulator comprising:
- a tapped delay line to provide a coarse resolution for one or more phases of an unbounded phase modulation signal;
- a digitally controlled delay line to provide a fine resolution to a coarse phase from the tapped delay line based on one or more least significant bits of the unbounded phase modulation signal;
- and
- a look up table to calibrate delay of the tapped delay line and the digitally controlled delay line.
1 more element
A modulator comprising:
- a tapped delay line to provide a coarse resolution for one or more phases of a signal;
- a phase multiplexer to receive one or more coarse phases from the tapped delay line and select a coarse phase to send to a digitally controlled delay line, the digitally controlled delay line to provide a fine resolution to the coarse phase from the phase multiplexer based on one or more least significant bits of the signal, wrap the phase back to the tapped delay line and repeat the one or more phases to synthesize an unbounded phase modulation signal.
A method comprising:
- applying a coarse resolution to each phase of a phase modulation signal via a tapped delay line;
- applying a fine residual delay to each coarse phase based on one or more least significant bits of the phase modulation signal;
- and
- circulating back to a first phase after the fine residual delay is applied to a last phase to synthesize an unbounded phase modulation signal.
1 more element
Dependencies are inferred from the claim text.