Patent ID: 7855586
Filing Date: 2010-12-21
Classification: H03K

Abstract:
1. A frequency jitter generator, comprising: a frequency generator, including a charge current source, a discharge current source, and a capacitor, the charge current source and the discharge current source being electrically coupled to the capacitor for charging and discharging the capacitor respectively, and the frequency generator being utilized for receiving a first reference level signal and a second reference level signal and charging and discharging the capacitor according to the first reference level signal and the second reference level signal respectively, such that the voltage of the capacitor varies between the first reference level signal and the second reference level signal to generate a frequency signal; and a frequency jitter controller, coupled to the frequency generator, including a ramp wave generator for generating a ramp wave signal to control the magnitude of currents of the charge current source and the discharge current source, for controlling the current of at least one of the charge current source and the discharge current source changed within a predetermined range.