Patent ID: 8717110
Filing Date: 2014-05-06
Classification: H03K

Abstract:
1. A method of making a frequency of a signal jitter, comprising: providing a reference signal having periodical magnitude variation with a slow frequency; making the signal periodically change its magnitude with at least two different fast frequencies, both the fast frequencies being higher than the slow frequency; comparing magnitude of the signal with magnitude of the reference signal; making an oscillator substantially operate in a first state to generate the signal when the magnitude of the signal is larger than the magnitude of the reference signal; making an oscillator substantially operate in a second state to generate the signal when the magnitude of the signal is smaller than the magnitude of the reference signal; and changing the reference signal to change a frequency of the signal; wherein the magnitude of the reference signal is between a maximum value and a minimum value of the signal, and the first state and the second state correspond to a maximum frequency and a minimum frequency of the signal, respectively.