Clock spread spectrum circuit, electronic equipment, and clock spread spectrum method
AssigneesBeijing BOE Technology Development Co., Ltd., Boe Technology Group Co., Ltd.
InventorsXiangye Wei, Liming Xiu, Yuhai Ma
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Abstract
A clock spread spectrum circuit, an electronic equipment, and a clock spread spectrum method are disclosed. The clock spread spectrum circuit includes a control circuit and a signal generation circuit. The control circuit is configured to generate a frequency control word according to a modulation parameter, and the frequency control word changes discretely with time; and the signal generation circuit is configured to receive the frequency control word and generate and output a spread spectrum output signal that is spectrum-spread according to the frequency control word, and the spread spectrum output signal corresponds to the frequency control word.
Claims19
A clock spread spectrum circuit, comprising:
- a control circuit, configured to generate a frequency control word according to a modulation parameter, wherein the frequency control word changes discretely with time;
- and
- a signal generation circuit, configured to receive the frequency control word and generate and output a spread spectrum output signal that is spectrum-spread according to the frequency control word, wherein the spread spectrum output signal corresponds to the frequency control word,
- wherein the frequency control word is expressed as:
- F(t)=I+r(t),
- wherein F(t) is the frequency control word, I is an integer part of the frequency control word, I is a constant and an integer, r(t) is a decimal part of the frequency control word, r(t) is a decimal and discretely changes with the time, and t represents the time.
A clock spread spectrum method, applied to a clock spread spectrum circuit,
- wherein the clock spread spectrum circuit comprises:
- a control circuit, configured to generate a frequency control word according to a modulation parameter, wherein the frequency control word changes discretely with time;
- and
- a signal generation circuit, configured to receive the frequency control word and generate and output a spread spectrum output signal that is spectrum-spread according to the frequency control word, wherein the spread spectrum output signal corresponds to the frequency control word,
- the frequency control word is expressed as:
- F(t)=I+r(t),
- wherein F(t) is the frequency control word, I is an integer part of the frequency control word, I is a constant and an integer, r(t) is a decimal part of the frequency control word, r(t) is a decimal and discretely changes with the time, and t represents the time,
- wherein the clock spread spectrum method comprises:
- generating the frequency control word according to the modulation parameter, wherein the frequency control word changes discretely with the time;
- and
- receiving the frequency control word, and generating and outputting the spread spectrum output signal that is spectrum-spread according to the frequency control word, wherein the spread spectrum output signal corresponds to the frequency control word.
A clock spread spectrum circuit, comprising:
- a control circuit, configured to generate a frequency control word according to a modulation parameter, wherein the frequency control word changes discretely with time;
- and
- a signal generation circuit, configured to receive the frequency control word and generate and output a spread spectrum output signal that is spectrum-spread according to the frequency control word, wherein the spread spectrum output signal corresponds to the frequency control word,
- wherein the signal generation circuit comprises:
- a base time unit generation sub-circuit, configured to generate and output a base time unit;
- and
- a spread spectrum sub-circuit, configured to generate and output the spread spectrum output signal according to the frequency control word and the base time unit.
Dependencies are inferred from the claim text.