Methods and systems for generating local oscillator signals
AssigneeNXP B.V.
InventorsFrank Harald Erich Ho Chung Leong, Olivier Aymard
Life of this patent
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Abstract
A method is provided for generating local oscillator signals for a mixer. The method includes providing a reference frequency signal and generating a differential in-phase signal and a differential quadrature signal from the reference frequency signal. The method further includes re-clocking each of the differential in-phase and differential quadrature signals using the reference frequency signal. The re-clocked differential in-phase and differential quadrature signals are then provided as the local oscillator signals for the mixer.
Claims20
A method for generating local oscillator signals for a mixer, the method comprising:
- providing a reference frequency signal;
- generating a differential in-phase signal and a differential quadrature signal from, and delayed relative to, the reference frequency signal, thereby providing a delayed differential in-phase signal, and a delayed quadrature signal;
- re-clocking each of the differential in-phase and differential quadrature signals, by using the reference frequency signal which is not delayed relative to the differential in-phase and differential quadrature signals as delayed;
- and
- providing the re-clocked differential in-phase and differential quadrature signals as the local oscillator signals for the mixer.
A method for generating local oscillator signals for a mixer, the method comprising:
- providing a reference frequency signal;
- generating a differential in-phase signal and a differential quadrature signal from the reference frequency signal;
- re-clocking each of the differential in-phase and differential quadrature signals using the reference frequency signal, wherein each of the re-clocked differential in-phase and quadrature signals has a 25% duty cycle;
- and
- providing the re-clocked differential in-phase and differential quadrature signals as the local oscillator signals for the mixer.
A system for generating local oscillator signals for a mixer, the system comprising:
- a signal generator configured to provide a reference frequency signal;
- a frequency divider configured to generate a differential in-phase signal and a differential quadrature signal from the reference frequency signal, the differential in-phase signal and the differential quadrature signal being delayed relative to the reference frequency signal;
- and
- circuitry configured to re-clock each of the differential in-phase and differential quadrature signals, by using the reference frequency signal which is delayed relative to the differential in-phase and differential quadrature signals as delayed, for providing the re-clocked differential in-phase and differential quadrature signals as the local oscillator signals for the mixer.
A system for generating local oscillator signals for a mixer, the system comprising:
- a signal generator configured to provide a reference frequency signal;
- a frequency divider configured to generate a differential in-phase signal and a differential quadrature signal from the reference frequency signal, and
- circuitry configured to re-clock each of the differential in-phase and differential quadrature signals using the reference frequency signal and to provide the re-clocked differential in-phase and differential quadrature signals as the local oscillator signals for the mixer, wherein each of the re-clocked differential in-phase and quadrature signals has a 25% duty cycle.
Dependencies are inferred from the claim text.