公开(公告)号：US09871529B1

公开(公告)日：2018-01-16

申请号：US15425653

申请日：2017-02-06

Applicant: Euhan Chong ,  Semyon Lebedev ,  Marc-Andre LaCroix

Inventor： Euhan Chong ,  Semyon Lebedev ,  Marc-Andre LaCroix

IPC: H03M1/38 ,  H03M1/12 ,  H03M1/00 ,  H03M1/06

CPC classification number: H03M1/38 ,  H03M1/00 ,  H03M1/0695 ,  H03M1/12 ,  H03M1/121 ,  H03M1/125

Abstract: Systems and circuits for feedback control of an asynchronous successive approximation register (SAR) analog-to-digital converter (ADC) are described. An example system includes the asynchronous SAR ADC. A timing detector circuit is coupled to the asynchronous SAR ADC to receive one or more internal signals from the asynchronous SAR ADC. The timing detector circuit outputs a timing detector signal representing an internal timing of the SAR ADC. The timing detector signal is generated based on the one or more internal signals. A regulator circuit is coupled to the timing detector circuit to receive the timing detector signal. The regulator circuit is also coupled to the asynchronous SAR ADC to output a feedback signal to the asynchronous SAR ADC. The feedback signal is generated based on the timing detector signal to control the internal timing of the SAR ADC to match a target timing.

公开(公告)号：US10009035B1

公开(公告)日：2018-06-26

申请号：US15495572

申请日：2017-04-24

Applicant: Marc-Andre LaCroix ,  Semyon Lebedev ,  Henry Wong ,  Davide Tonietto

Inventor： Marc-Andre LaCroix ,  Semyon Lebedev ,  Henry Wong ,  Davide Tonietto

IPC: H03M1/06 ,  H03M1/08 ,  H04B1/38 ,  H03M1/12 ,  H04L25/06 ,  H03M1/00

CPC classification number: H04B1/38 ,  H03M1/00 ,  H03M1/007 ,  H03M1/12 ,  H03M1/1215 ,  H03M1/46 ,  H04L25/067

Abstract: Methods, systems and devices for dynamically controlling resolution of an analog-to-digital converter (ADC). The ADC receives an analog input signal and outputs digital data. A statistical unit coupled to the ADC obtains samples of the output signal and transmits a control signal to the ADC to adjust the resolution of the ADC. The control signal is generated by the statistical unit based on a comparison of at least one performance indicator with a target performance level. The at least one performance indicator is calculated using the samples.

公开(公告)号：US09306609B1

公开(公告)日：2016-04-05

申请号：US14595303

申请日：2015-01-13

Applicant: Marc-Andre LaCroix

Inventor： Marc-Andre LaCroix

IPC: H04B3/00 ,  H04B1/16 ,  H04B3/54

CPC classification number: H04B3/548

Abstract: A front-end of a first differential circuit is DC-coupled to a second differential circuit. The front-end comprises a resistive element, a voltage sensor and a current adjustor. The resistive element has a resistivity between a first end that is DC-coupled to the second circuit and a second end that is DC-coupled to the first circuit and accepts a programmable current passing therethrough to impose a voltage across the element that varies in direction and amplitude according to the current value. The voltage sensor senses a difference between a DC voltage at the second end of the resistive element and a desired reference voltage of the first circuit. The current adjustor adjusts a direction and amplitude of the programmable current so that the voltage of the first circuit matches the desired reference voltage of the first circuit. The first circuit may be a receiver circuit and the second circuit may be a transmitter circuit. The front-end may further comprise a current canceller comprising a second resistive element connected at a first end to the output of the second circuit. The current canceller senses the programmable current and generates a current of equal amplitude through the second resistive element and away from the output of the second circuit. The current canceller may be implemented in digital or analog form and/or in differential or common-mode operation.

Abstract translation: 第一差分电路的前端被直流耦合到第二差分电路。 前端包括电阻元件，电压传感器和电流调节器。 电阻元件在与第二电路直流耦合的第一端和与第一电路直流耦合的第二端之间具有电阻率，并且接受通过其中的可编程电流，从而在方向上变化的元件施加电压 和幅度根据当前值。 电压传感器感测电阻元件的第二端处的直流电压与第一电路的期望参考电压之间的差。 电流调节器调节可编程电流的方向和幅度，使得第一电路的电压与第一电路的期望参考电压匹配。 第一电路可以是接收器电路，第二电路可以是发射机电路。 前端还可以包括电流消除器，其包括在第一端连接到第二电路的输出的第二电阻元件。 电流消除器感测可编程电流并且通过第二电阻元件产生相等振幅的电流并远离第二电路的输出。 电流消除器可以以数字或模拟形式和/或差分或共模操作来实现。