Combined IQ-Polar Radio Frequency Digital-to-Analog-Converter (RFDAC) Systems and Methods
AssigneeApple Inc.
InventorsBevin G. Perumana, Saikat Sarkar, Tirdad Sowlati
Life of this patent
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Abstract
A transmitter may include an in-phase and quadrature-phase (IQ)-based digital to analog converter (DAC) and a polar-based DAC. The transmitter also may include mode circuitry coupled to the IQ-based DAC and the polar-based DAC. The mode circuitry may be configured to operate the IQ-based DAC to generate a phase component of an output signal and operate the polar-based DAC to generate an amplitude component of the output signal in a first mode of operation. The mode circuitry also may be configured to operate the IQ-based DAC to generate the phase component and the amplitude component of the output signal in a second mode of operation.
Claims20
A transmitter comprising:
- an in-phase and quadrature-phase (IQ)-based digital to analog converter (DAC);
- a polar-based DAC;
- and
- mode circuitry coupled to the IQ-based DAC and the polar-based DAC and configured to
- operate the IQ-based DAC to generate a phase component of an output signal and operate the polar-based DAC to generate an amplitude component of the output signal in a first mode of operation, and
- operate the IQ-based DAC to generate the phase component and the amplitude component of the output signal in a second mode of operation.
An electronic device comprising:
- logic or circuitry;
- and
- a transmission path communicatively coupled to the logic or circuitry, the transmission path comprising
- an in-phase and quadrature-phase (IQ)-based digital to analog converter (DAC);
- a polar-based DAC;
- and
- mode selection circuitry coupled to the IQ-based DAC and the polar-based DAC and configured to
- operate the IQ-based DAC to generate a phase component of a radio frequency (RF) signal and operate the polar-based DAC to generate an amplitude component of the RF signal based on an indication from the logic or circuitry to operate in a first operating mode, and
- operate the IQ-based DAC to generate the phase component of the RF signal and the amplitude component of the RF signal based on an indication from the logic or circuitry to operate in a second operating mode.
A method comprising:
- receiving, via mode circuitry of an in-phase and quadrature-phase- (IQ-) polar digital to analog converter (DAC), a first indication to operate in a first operating mode;
- causing, via the mode circuitry of the combined IQ-polar DAC, an IQ portion of the combined IQ-polar DAC to generate a phase component and an amplitude component of a signal based on the first indication;
- receiving, via the mode circuitry of the combined IQ-polar DAC, a second indication to operate in a second operating mode;
- causing, via the mode circuitry of the combined IQ-polar DAC, the IQ portion of the combined IQ-polar DAC to generate the phase component and a polar portion of the combined IQ-polar DAC to generate the amplitude component of the signal based on the second indication;
- and
- transmitting, via a transmitter, the signal.
Dependencies are inferred from the claim text.