公开(公告)号：US20160020773A1

公开(公告)日：2016-01-21

申请号：US14332614

申请日：2014-07-16

Applicant: VIA Telecom Co., Ltd.

Inventor： Shih-An YU ,  Sen-You LIU ,  Fang-Ren LIAO ,  Yi-Pei SU

IPC: H03L7/08 ,  H02M3/07 ,  H03B5/32 ,  H03L7/099 ,  H03L7/093

CPC classification number: H03B5/32 ,  H02M3/07 ,  H03C3/0933 ,  H03L7/087 ,  H03L7/0893 ,  H03L7/18 ,  H03L7/1972 ,  H03L7/1976

Abstract: A phase-locked loop circuit includes a phase detector, a charge pump, a capacitor, and a capacitor multiplier. The phase detector receives a reference frequency and a feedback frequency to generate a up/down signal. The charge pump, which includes a positive node and a negative node, receives the up/down signal to generate a first current. The capacitor is coupled to the negative node. The capacitor multiplier, coupled to the negative node, generates a second current which is the first current divided by a first scaling number.

Abstract translation: 锁相环电路包括相位检测器，电荷泵，电容器和电容器倍增器。 相位检测器接收参考频率和反馈频率以产生上/下信号。 包括正节点和负节点的电荷泵接收上/下信号以产生第一电流。 电容器耦合到负节点。 耦合到负节点的电容器倍增器产生第二电流，其是第一电流除以第一缩放数。

公开(公告)号：US20150346244A1

公开(公告)日：2015-12-03

申请号：US14287569

申请日：2014-05-27

Applicant: VIA Telecom Co., Ltd.

Inventor： Shih-An YU ,  Yu-Hong LIN ,  Sen-You LIU ,  Fang-Ren LIAO

IPC: G01R19/10 ,  G01R23/02

CPC classification number: G01R19/10 ,  G01R19/0023 ,  G01R23/02 ,  G01R27/28 ,  H03L7/099 ,  H03L7/183

Abstract: A voltage-controlled oscillator gain measurement system includes a voltage-controlled oscillator, a voltage detector, and a processor. The voltage-controlled oscillator, which is configured in a phase-locked loop circuit, generates an output signal with an output frequency according to a control signal. The control signal is generated according to the output signal divided by a scaling number. The voltage detector is configured to measure a voltage difference of the control signal. The processor adjusts the scaling number to generate an output frequency difference of the output signal, and obtains a reciprocal gain of the voltage-controlled oscillator by dividing the voltage difference by the output frequency difference.

Abstract translation: 压控振荡器增益测量系统包括压控振荡器，电压检测器和处理器。 配置在锁相环电路中的压控振荡器根据控制信号产生具有输出频率的输出信号。 控制信号根据输出信号除以比例数字产生。 电压检测器被配置为测量控制信号的电压差。 处理器调整缩放数以产生输出信号的输出频率差，并通过将电压差除以输出频率差来获得压控振荡器的互逆增益。