公开(公告)号：US08648641B2

公开(公告)日：2014-02-11

申请号：US13678782

申请日：2012-11-16

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.

Inventor： Gang Zha

IPC: H03L5/00

CPC classification number: H03L5/00 ,  H03H11/245

Abstract: A voltage controlled variable resistor circuit is configured to variably attenuate a variable source signal. A fixed attenuation circuit is coupled to receive the variable source signal and output an attenuated variable source signal. The variable source signal is further applied across a variable resistive divider formed of a fixed resistive circuit and a variable resistive circuit. The variable resistive circuit has a first input configured to receive the attenuated variable source signal and a second input configured to receive a variable resistance control signal. The variable resistive circuit is configured to have a resistance which is variable in response to the attenuated variable source signal and the variable resistance control signal.

Abstract translation: 电压控制可变电阻电路被配置为可变地衰减可变源信号。 耦合固定衰减电路以接收可变源信号并输出​​衰减的可变源信号。 可变源信号进一步施加在由固定电阻电路和可变电阻电路构成的可变电阻分压器上。 可变电阻电路具有被配置为接收衰减的可变源信号的第一输入和被配置为接收可变电阻控制信号的第二输入。 可变电阻电路被配置为具有响应于衰减的可变源信号和可变电阻控制信号而变化的电阻。

公开(公告)号：US20130141152A1

公开(公告)日：2013-06-06

申请号：US13678782

申请日：2012-11-16

Applicant: STMICROELECTRONICS (SHENZHEN) R&D CO. LTD.

Inventor： Gang Zha

IPC: H03L5/00

CPC classification number: H03L5/00 ,  H03H11/245

Abstract: A voltage controlled variable resistor circuit is configured to variably attenuate a variable source signal. A fixed attenuation circuit is coupled to receive the variable source signal and output an attenuated variable source signal. The variable source signal is further applied across a variable resistive divider formed of a fixed resistive circuit and a variable resistive circuit. The variable resistive circuit has a first input configured to receive the attenuated variable source signal and a second input configured to receive a variable resistance control signal. The variable resistive circuit is configured to have a resistance which is variable in response to the attenuated variable source signal and the variable resistance control signal.

Abstract translation: 电压控制可变电阻电路被配置为可变地衰减可变源信号。 耦合固定衰减电路以接收可变源信号并输出​​衰减的可变源信号。 可变源信号进一步施加在由固定电阻电路和可变电阻电路构成的可变电阻分压器上。 可变电阻电路具有被配置为接收衰减的可变源信号的第一输入和被配置为接收可变电阻控制信号的第二输入。 可变电阻电路被配置为具有响应于衰减的可变源信号和可变电阻控制信号而变化的电阻。