US 9,867,135 B1 · Frequency-generating circuit and communications apparatus

Abstract

A frequency-generating circuit includes a frequency synthesizer circuit and a reference clock signal processor. The frequency synthesizer circuit receives a processed reference clock signal and generates a radio-frequency clock signal according to the processed reference clock signal. The reference clock signal processor receives an original reference clock signal from an oscillator and processes the original reference clock signal according to an indication signal to generate the processed reference clock signal. The indication signal is generated according to a required reference clock frequency of a communications apparatus. When the required reference clock frequency is high, a frequency of the processed reference clock signal is a multiple of a frequency of the original reference clock signal, and when the required reference clock frequency is low, the frequency of the original reference clock signal is a multiple of the frequency of the processed reference clock signal.

Claims16

Dependent claims

A frequency-generating circuit, comprising:

a frequency synthesizer circuit, receiving a processed reference clock signal and generating a radio-frequency clock signal according to the processed reference clock signal;
and
a reference clock signal processor, receiving an original reference clock signal from an oscillator and processing the original reference clock signal according to an indication signal to generate the processed reference clock signal,
wherein the indication signal is generated according to a required reference clock frequency of a communications apparatus, and
wherein when the required reference clock frequency is high, a frequency of the processed reference clock signal is a multiple of a frequency of the original reference clock signal, and when the required reference clock frequency is low, the frequency of the original reference clock signal is a multiple of the frequency of the processed reference clock signal.

2 more elements

A communications apparatus, comprising:

a frequency-generating circuit, generating a radio-frequency clock signal according to an original reference clock signal;
and
a reference clock controller, generating an indication signal according to a required reference clock frequency;
wherein the frequency-generating circuit comprises:
a frequency synthesizer circuit, receiving a processed reference clock signal and generating the radio-frequency clock signal according to the processed reference clock signal;
and
a reference clock signal processor, receiving the original reference clock signal from an oscillator and processing the original reference clock signal according to the indication signal to generate the processed reference clock signal,
wherein when the required reference clock frequency is high, a frequency of the processed reference clock signal is a multiple of a frequency of the original reference clock signal, and when the required reference clock frequency is low, the frequency of the original reference clock signal is a multiple of the frequency of the processed reference clock signal.

5 more elements

Dependencies are inferred from the claim text.

Frequency-generating circuit and communications apparatus

Life of this patent

Frequency-generating circuit and communications apparatus

Life of this patent

Abstract

Claims16