Frequency jitter generation circuit
AssigneeNiko Semiconductor Co., Ltd.
InventorTe-Hsien Hsu
Life of this patent
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Abstract
A frequency jitter generation circuit having a voltage generator and an oscillator circuit is provided. The voltage generator receives an input voltage and converts the input voltage into an upper reference voltage output to the oscillator circuit. Voltage level of the upper reference voltage is varying. The oscillator circuit is coupled with the voltage generator. Voltage level of a reference voltage in the oscillator circuit is oscillated between the upper reference voltage and a lower reference voltage to generate a frequency signal with a jitter based on the variation of the upper reference voltage.
Claims10
A frequency jitter generation circuit, comprising:
- a voltage generator, for receiving an input voltage and converting the input voltage into a varying limitation voltage;
- an oscillator circuit, coupled to the voltage generator, for outputting a reference voltage of the oscillator circuit being oscillated between an upper reference voltage and a lower reference voltage to generate a frequency signal;
- and
- a frequency divider circuit, coupled to the oscillator circuit and the voltage generator, for performing a frequency dividing according to the frequency signal in order to generate a first control signal and a second control signal for controlling a variation of the limitation voltage;
- wherein the second control signal is an inverted signal with respect to the first control signal, and the limitation voltage is received by the oscillator circuit as the upper reference voltage or the lower reference voltage.
Dependencies are inferred from the claim text.