公开(公告)号：US09160356B1

公开(公告)日：2015-10-13

申请号：US14334545

申请日：2014-07-17

Applicant: Analog Devices Global

Inventor： Niall Kevin Kearney ,  Keith O'Donoghue ,  Hongxing Li

IPC: H03M1/10

CPC classification number: H03M3/386 ,  H03M3/40 ,  H03M3/424 ,  H03M3/452

Abstract: An analog to digital convertor (ADC) comprises an integrator having an input selectively connected to an intermediate frequency (IF) signal input and an output connected to a summer. The summer has an output connected to an input of a quantizer, the quantizer output being operatively connected to a signal strength indicator. The integrator includes a programmable gain feedback component. The summer has a synthesized calibration signal input, the value of the programmable gain feedback component being configured to vary when a synthesized calibration signal at the intermediate frequency is applied to the summer. The signal strength indicator is configured to detect a value of the programmable gain feedback component when the signal strength is minimized and to calibrate the ADC accordingly.

Abstract translation: 模数转换器（ADC）包括积分器，其具有选择性地连接到中频（IF）信号输入的输入端和连接到夏季的输出。 夏季具有连接到量化器的输入的输出，量化器输出可操作地连接到信号强度指示器。 积分器包括可编程增益反馈分量。 夏季具有合成的校准信号输入，可编程增益反馈分量的值被配置为当将中频处的合成校准信号施加到夏季时变化。 信号强度指示器被配置为当信号强度最小化时检测可编程增益反馈分量的值，并相应地校准ADC。

公开(公告)号：US09590590B2

公开(公告)日：2017-03-07

申请号：US14537836

申请日：2014-11-10

Applicant: ANALOG DEVICES GLOBAL

Inventor： Hongxing Li ,  Niall Kevin Kearney ,  Keith O'Donoghue

IPC: H03M1/10 ,  H03H11/04 ,  H03M3/00

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。