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US 2026/0280488 A1Published application
Phase-adjustment of multiphase local oscillator (lo) signals for a harmonic rejection mixer (hrm)
AssigneeQUALCOMM Incorporated
InventorsAsad Ali Nawaz, Ibrahim Ramez Chamas, Yung-Chung Lo
Life of this patent
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Abstract
An apparatus includes a multiphase harmonic rejection mixer (HRM) configured to receive a plurality of multiphase local oscillator (LO) signals. The apparatus further includes delay circuitry coupled to the multiphase HRM. The delay circuitry is configured to phase-adjust at least a first LO signal of the plurality of multiphase LO signals relative to a second LO signal of the plurality of multiphase LO signals.
Claims20
An apparatus comprising:
- a multiphase harmonic rejection mixer (HRM) configured to receive a plurality of multiphase local oscillator (LO) signals;
- and
- delay circuitry coupled to the multiphase HRM, the delay circuitry configured to phase-adjust at least a first LO signal of the plurality of multiphase LO signals relative to a second LO signal of the plurality of multiphase LO signals.
A method comprising:
- phase-adjusting at least a first local oscillator (LO) signal of a plurality of multiphase LO signals relative to a second LO signal of the plurality of multiphase LO signals;
- and
- inputting the plurality of multiphase LO signals to a harmonic rejection mixer (HRM).
An apparatus comprising:
- a harmonic rejection mixer (HRM);
- and
- a local oscillator (LO) generation circuit coupled to the HRM and comprising:
- a phase detector comprising multiple paths and a first set of switches, the first set of switches including a respective switch in each path of the multiple paths;
- an amplifier coupled to the phase detector;
- a second set of switches coupled to at least one of an input of the amplifier or an output of the amplifier;
- a plurality of direct current (DC) level shifters coupled to the amplifier;
- and
- a plurality of delay lines coupled to the plurality of DC level shifters.
6 more elements
Dependencies are inferred from the claim text.