公开(公告)号：US20140320216A1

公开(公告)日：2014-10-30

申请号：US14022547

申请日：2013-09-10

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chih-Hsien WANG

IPC: H03L7/08

CPC classification number: H03L7/00

Abstract: An oscillator circuit includes: a switched-capacitor filter filtering a voltage at a common node between a current generating unit and a frequency-controlled resistor so as to generate a filtered voltage; an amplifier generating a control voltage based on the filtered voltage and a voltage at a common node between the current generating unit and a reference resistor; a voltage-controlled oscillator generating an oscillation signal based on the control voltage; and a control signal generating unit generating, based on the oscillation signal, a control input having a frequency proportional to that of the oscillation signal. The frequency-controlled resistor has a resistance variable according to the control input.

Abstract translation: 振荡电路包括：开关电容滤波器，对电流产生单元和频率控制电阻之间的公共节点的电压进行滤波，以产生滤波电压; 基于所述滤波电压产生控制电压的放大器和所述电流产生单元与参考电阻器之间的公共节点处的电压; 基于所述控制电压产生振荡信号的压控振荡器; 以及控制信号生成单元，其基于所述振荡信号生成具有与所述振荡信号的频率成比例的频率的控制输入。 频率控制电阻根据控制输入具有电阻变量。