公开(公告)号：US08952759B2

公开(公告)日：2015-02-10

申请号：US13677946

申请日：2012-11-15

Applicant: MediaTek Inc.

Inventor： Ping-Ying Wang ,  Kuan-Hua Chao ,  Jeng-Horng Tsai

IPC: H03L7/00 ,  H03L9/00 ,  H03K3/03 ,  H03K5/13 ,  H03L7/089 ,  H03L7/099 ,  H03L7/113 ,  H03K5/00 ,  H04L7/033

CPC classification number: H03L9/00 ,  H03K3/0315 ,  H03K5/133 ,  H03K2005/00032 ,  H03K2005/00071 ,  H03K2005/00195 ,  H03K2005/00234 ,  H03L7/089 ,  H03L7/0891 ,  H03L7/0995 ,  H03L7/113 ,  H04L7/033

Abstract: A circuit for controlling a mixed mode controlled oscillator. The circuit comprises a charge pump, and a digital loop filter. The charge pump is coupled to the mixed mode controlled oscillator. The charge pump receives an up/down signal and sends a current signal to the mixed mode controlled oscillator. The digital loop filter receives the up/down signal and generates a digital code signal to the mixed mode controlled oscillator. An output frequency of the mixed mode controlled oscillator is controlled by the current signal and the digital code signal.

Abstract translation: 一种用于控制混合模式控制振荡器的电路。 电路包括电荷泵和数字环路滤波器。 电荷泵耦合到混合模式受控振荡器。 电荷泵接收上/下信号并将电流信号发送到混合模式受控振荡器。 数字环路滤波器接收上/下信号，并向混合模式控制振荡器产生数字码信号。 混合模式控制振荡器的输出频率由电流信号和数字代码信号控制。