Generation of Digital Clock for System Having RF Circuitry
AssigneeHuawei Technologies Co., Ltd.
InventorsPatrick Vandenameele, Norman Beamish
Life of this patent
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Abstract
Circuitry for any of a transceiver, a transmitter, and a receiver, has radio frequency (RF) circuitry, digital circuitry, a carrier signal generator to provide a carrier signal to the RF circuitry and a clock generator for generating a digital clock for clocking at least some of the digital circuitry. The RF circuitry is susceptible to interference from harmonics of the clocking, and the clock generator derives a frequency of the digital clock based on a frequency divided down from a frequency of the carrier signal so that the interference to the RF circuitry occurs at frequencies which are harmonics of the carrier signal.
Claims17
Circuitry for any of a transceiver, a transmitter, and a receiver, comprising:
- radio frequency (RF) circuitry;
- digital circuitry;
- a carrier signal generator;
- and
- a clock generator to generate a digital clock for clocking at least some of the digital circuitry,
- wherein the RF circuitry is susceptible to interference from harmonics of the clocking of the digital circuitry,
- wherein the carrier signal generator is coupled to provide a carrier signal to the RF circuitry, and
- wherein the clock generator is arranged to derive a frequency of the digital clock based on a frequency divided down from a frequency of the carrier signal such that the interference to the RF circuitry occurs at frequencies that are harmonics of the carrier signal.
A mobile device comprising:
- radio frequency (RF) circuitry;
- digital circuitry;
- a carrier signal generator;
- and
- a clock generator to generate a digital clock for clocking at least some of the digital circuitry,
- wherein the RF circuitry is susceptible to interference from harmonics of the clocking of the digital circuitry,
- wherein the carrier signal generator is coupled to provide a carrier signal to the RF circuitry,
- wherein the clock generator is arranged to derive a frequency of the digital clock based on a frequency divided down from a frequency of the carrier signal such that the interference to the RF circuitry occurs at frequencies that are harmonics of the carrier signal, and
- wherein the RF circuitry, the digital circuitry, the carrier signal generator, and the clock generator comprise circuitry of the mobile device.
A method of generating a digital clock for clocking digital circuitry associated with any of a transceiver, a transmitter, and a receiver, the method comprising:
- generating a carrier signal for radio frequency (RF) circuitry, wherein the RF circuitry is susceptible to interference from harmonics of the clocking of the digital circuitry;
- and
- deriving a frequency of the digital clock based on a frequency divided down from a frequency of the carrier signal such that the interference to the RF circuitry occurs at frequencies which are harmonics of the carrier signal.
Dependencies are inferred from the claim text.