公开(公告)号：US20160134301A1

公开(公告)日：2016-05-12

申请号：US14537836

申请日：2014-11-10

Applicant: ANALOG DEVICES GLOBAL

Inventor： Hongxing Li ,  NIALL KEVIN KEARNEY ,  KEITH O'DONOGHUE

IPC: H03M3/00 ,  H03H11/04

CPC classification number: H03H11/0422 ,  H03M3/396 ,  H03M3/422 ,  H03M3/438 ,  H03M3/458

Abstract: A dynamically tunable transconductor includes a voltage-to-current converter stage for generating a current signal based on a voltage signal; and a current scaling stage for scaling the current signal by a scaling factor to achieve a particular transconductance. Current scaling stage includes a coarse tune mechanism having an associated coarse tune step and a fine tune mechanism having an associated fine tune step, where the scaling factor is a ratio of the coarse tune step to the fine tune step. A delta-sigma modulator can implement the transconductor to generate loop filter coefficients by dynamically tuning the transconductance to achieve a particular resistance.

Abstract translation: 一种动态可调谐的跨导体包括用于基于电压信号产生电流信号的电压 - 电流转换器级; 以及用于按比例因子缩放当前信号以实现特定跨导的电流缩放级。 当前缩放级包括具有相关联的粗调步骤的粗调机构和具有相关联的微调步骤的微调机构，其中缩放因子是粗调步骤与微调步骤的比率。 Δ-Σ调制器可以通过动态调谐跨导来实现跨导体来产生环路滤波器系数以实现特定的电阻。