公开(公告)号：US20150286235A1

公开(公告)日：2015-10-08

申请号：US14244321

申请日：2014-04-03

Applicant: QUALCOMM INCORPORATED

Inventor： Mohammad Bagher VAHID FAR ,  Abbas KOMIJANI ,  Chan Hong PARK

IPC: G05F3/02

CPC classification number: G05F3/02 ,  G05F3/262

Abstract: Certain aspects of the present disclosure provide voltage regulating circuits which are power efficient, low noise, and substantially insensitive to changes in process technology, power supply voltage, and temperature. Such circuits may be used to provide the regulated voltage for a voltage-controlled oscillator (VCO), for example, as found in a radio frequency front end (RFFE). One example voltage regulating circuit generally includes a current source configured to supply or sink a reference current and a current mirror having a bias branch and a main branch, wherein the bias branch is connected with the current source, wherein the main branch includes a source follower to provide the regulated voltage, and wherein the reference current is available at a node for the regulated voltage.

Abstract translation: 本公开的某些方面提供了功率有效，低噪声并且对工艺技术，电源电压和温度变化基本上不敏感的电压调节电路。 可以使用这样的电路来为例如在射频前端（RFFE）中找到的压控振荡器（VCO）提供调节电压。 一个示例性电压调节电路通常包括被配置为提供或吸收参考电流的电流源和具有偏压支路和主支路的电流镜，其中偏压支路与电流源连接，其中主支路包括源极跟随器 以提供调节电压，并且其中参考电流在用于调节电压的节点处可用。