首页> 外国专利> Accurate resistance capacitance (RC) time constant calibration with metal-oxide-metal (MOM) capacitors for precision frequency response of integrated filters

Accurate resistance capacitance (RC) time constant calibration with metal-oxide-metal (MOM) capacitors for precision frequency response of integrated filters

机译:使用金属氧化物金属(MOM)电容器进行精确的电阻电容(RC)时间常数校准,以实现集成滤波器的精确频率响应

摘要

A calibration system employed for use with a resistance capacitance (RC) filter having resistors and capacitors with parasitic capacitance associated therewith. The calibration system has a digital calibration circuit receiving a time constant signal and generating, based thereon, a control word of N digital bits. The calibration system includes an analog monitor circuit having monitor capacitance assembly having a particular equivalent resistor and capacitor configuration. The analog monitor circuit generates the time constant signal and includes N switches, where each switch is controlled by one of the N bits of the control word, each switch is configured to connect or disconnect one or more capacitors of the monitor capacitor assembly thereby generating a time constant signal that represents the time constant of the RC integrated filter.
机译:一种与电阻电容(RC)滤波器一起使用的校准系统,该电阻电容(RC)滤波器具有与寄生电容相关联的电阻器和电容器。校准系统具有数字校准电路,该数字校准电路接收时间常数信号并基于其生成N个数字位的控制字。该校准系统包括具有监视电容组件的模拟监视电路,该监视电容组件具有特定的等效电阻器和电容器配置。模拟监控器电路生成时间常数信号,并包括N个开关,其中每个开关由控制字的N个位之一控制,每个开关配置为连接或断开监控器电容器组件的一个或多个电容器,从而产生一个时间常数信号,代表RC集成滤波器的时间常数。

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