公开(公告)号：US20130285755A1

公开(公告)日：2013-10-31

申请号：US13911876

申请日：2013-06-06

Applicant: Fujitsu Semiconductor Limited

Inventor： Kristopher Kevin Kaufman ,  John Wayne Simmons

IPC: H03K3/36

CPC classification number: H03K3/36 ,  H03B5/02 ,  H03B5/1206 ,  H03B5/1228 ,  H03B5/364 ,  H03B2200/0012 ,  H03B2200/0026 ,  H03B2200/0046 ,  H03F3/72 ,  H03K19/09429

Abstract: In accordance with some embodiments of the present disclosure, an oscillator circuit comprises, a first pad associated with a first terminal of an oscillator and a second pad associated with a second terminal of the oscillator. The oscillator is configured to generate an oscillating signal and communicate the oscillating signal from the second terminal to a clock distributor coupled to the second pad. The oscillator circuit further comprises an oscillator gain element comprising an output node coupled to the first pad and an input node coupled to the second pad. The oscillator circuit also comprises a digital-to-analog converter (DAC) coupled to the first pad. The oscillator circuit additionally comprises a switching circuit coupled to the gain element. The switching circuit is configured to enable the gain element when the oscillator comprises a resonator and disable the gain element when the oscillator comprises a voltage controlled oscillating module.

Abstract translation: 根据本公开的一些实施例，振荡器电路包括：与振荡器的第一端子相关联的第一焊盘和与振荡器的第二端子相关联的第二焊盘。 振荡器被配置为产生振荡信号并将振荡信号从第二终端传送到耦合到第二焊盘的时钟分配器。 振荡器电路还包括振荡器增益元件，其包括耦合到第一焊盘的输出节点和耦合到第二焊盘的输入节点。 振荡器电路还包括耦合到第一焊盘的数模转换器（DAC）。 振荡器电路还包括耦合到增益元件的开关电路。 开关电路被配置为当振荡器包括谐振器时启用增益元件，并且当振荡器包括电压控制的振荡模块时禁用增益元件。