公开(公告)号：US20170141773A1

公开(公告)日：2017-05-18

申请号：US15236365

申请日：2016-08-12

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Michael Thomas Engelhardt

IPC: H03K17/16

CPC classification number: H04B1/0475 ,  H03H11/53 ,  H04B15/04

Abstract: A method and system of providing an active differential resistor. The active differential resistor includes a diode having a first node and a second node. There is a capacitor coupled in series between the first node of the diode and an input of the active differential resistor. There is a current source coupled across the first node and the second node of the diode and configured to forward bias the diode such that a Johnson-Nyquist noise of the active differential resistor is replaced by a shot noise.

公开(公告)号：US09866245B2

公开(公告)日：2018-01-09

申请号：US15236365

申请日：2016-08-12

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Michael Thomas Engelhardt

IPC: H03K17/30 ,  H04B1/04

CPC classification number: H04B1/0475 ,  H03H11/53 ,  H04B15/04

Abstract: A method and system of providing an active differential resistor. The active differential resistor includes a diode having a first node and a second node. There is a capacitor coupled in series between the first node of the diode and an input of the active differential resistor. There is a current source coupled across the first node and the second node of the diode and configured to forward bias the diode such that a Johnson-Nyquist noise of the active differential resistor is replaced by a shot noise.

公开(公告)号：US20160276839A1

公开(公告)日：2016-09-22

申请号：US14869114

申请日：2015-09-29

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Michael Thomas Engelhardt

IPC: H02J4/00 ,  H02M1/12

CPC classification number: H02J4/00 ,  H02M1/12 ,  H02M1/44

Abstract: A switch mode power supply may utilize a switching signal to control one or more power switches in the switch mode power supply. A switch mode power supply controller may generate and/or control this switching signal. The controller may reduce the peak spectral noise of the switch mode power supply by varying the instantaneous switching frequency at a constant slew rate magnitude that changes sign at random times. The instantaneous switching frequency may be controlled by a signal that is generated by integrating a random bit stream. The stream may repeat at a sub-audio frequency. The integrator may be lossy, so that the output does not wonder off to an arbitrary value. The frequency modulation signal may be filtered by a low pass filter.

Abstract translation: 开关模式电源可以利用开关信号来控制开关模式电源中的一个或多个电源开关。 开关模式电源控制器可以产生和/或控制该开关信号。 控制器可以通过在随机时间改变符号的恒定压摆率幅值下改变瞬时开关频率来降低​​开关模式电源的峰值频谱噪声。 瞬时切换频率可以由通过对随机比特流进行积分而产生的信号来控制。 流可以以子音频重复。 积分器可能是有损的，因此输出并不奇怪任意值。 频率调制信号可以由低通滤波器滤波。

公开(公告)号：US10218394B2

公开(公告)日：2019-02-26

申请号：US15834047

申请日：2017-12-06

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Michael Thomas Engelhardt

IPC: H03K17/30 ,  H04B1/04 ,  H04B15/04 ,  H03H11/46

Abstract: A method and system of providing an active differential resistor. The active differential resistor includes a diode having a first node and a second node. There is a capacitor coupled in series between the first node of the diode and an input of the active differential resistor. There is a current source coupled across the first node and the second node of the diode and configured to forward bias the diode such that a Johnson-Nyquist noise of the active differential resistor is replaced by a shot noise.

公开(公告)号：US20180102800A1

公开(公告)日：2018-04-12

申请号：US15834047

申请日：2017-12-06

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Michael Thomas Engelhardt

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03H11/53 ,  H04B15/04

Abstract: A method and system of providing an active differential resistor. The active differential resistor includes a diode having a first node and a second node. There is a capacitor coupled in series between the first node of the diode and an input of the active differential resistor. There is a current source coupled across the first node and the second node of the diode and configured to forward bias the diode such that a Johnson-Nyquist noise of the active differential resistor is replaced by a shot noise.