公开(公告)号：US09654002B2

公开(公告)日：2017-05-16

申请号：US14918893

申请日：2015-10-21

Applicant: QUALCOMM Incorporated

Inventor： James Thomas Doyle ,  Farsheed Mahmoudi ,  Chuang Zhang ,  Zhengming Fu ,  Sassan Shahrokhinia

IPC: H02J3/12 ,  G05F1/00 ,  H02M3/158 ,  H02M1/38 ,  H02M3/157 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M1/38 ,  H02M3/157 ,  H02M2001/0012 ,  H02M2001/0048 ,  Y02B70/1491

Abstract: An apparatus and method are disclosed for efficiently using power at a voltage regulator, such as a synchronous buck converter. The synchronous buck converter includes a first switch and a second switch operated by a first control signal and a second control signal, respectively, where the first and second control signals have a corresponding phase difference. A logic circuit measures a duty cycle of an input pulse width modulated (PWM) signal against iterative changes of the phase difference between the first control signal and the second control signal. The logic circuit selects a phase difference corresponding to a minimum value of the PWM signal, thereby optimizing dead time at the synchronous buck converter. The logic circuit may include a Digital Pulse Width Modulator.

公开(公告)号：US09575095B2

公开(公告)日：2017-02-21

申请号：US14459208

申请日：2014-08-13

Applicant: QUALCOMM Incorporated

Inventor： Junmou Zhang ,  Chuang Zhang ,  Yuancheng Christopher Pan ,  Nan Chen

IPC: G01R23/02 ,  G01R19/00 ,  G01R31/28 ,  G01R19/165

CPC classification number: G01R19/0084 ,  G01R19/16552 ,  G01R23/02 ,  G01R31/282

Abstract: Systems and methods for sensing voltage on a chip are described herein. In one embodiment, a voltage sensor comprises a voltage-controlled oscillator coupled to a voltage being sensed, and a plurality of transition detectors, wherein each of the transition detectors is coupled to a different location on the oscillator, and wherein each of the transition detectors is configured to count a number of transitions at the respective location over a time period. The voltage sensor also comprises an adder configured to add the numbers of transitions from the transition detectors to generate an output value that is approximately proportional to the voltage.

Abstract translation: 本文描述了用于感测芯片上的电压的系统和方法。 在一个实施例中，电压传感器包括耦合到被感测的电压的压控振荡器和多个转换检测器，其中每个转换检测器耦合到振荡器上的不同位置，并且其中每个转换检测器 被配置为在一段时间段内对相应位置的多个转换进行计数。 电压传感器还包括加法器，其被配置为将来自转换检测器的转移数目相加以产生大致与电压成比例的输出值。

公开(公告)号：US20160069939A1

公开(公告)日：2016-03-10

申请号：US14480321

申请日：2014-09-08

Applicant: QUALCOMM Incorporated

Inventor： Chuang Zhang ,  Nan Chen ,  Junmou Zhang

IPC: G01R19/252 ,  G01R23/10

CPC classification number: G01R19/252 ,  G01R23/10 ,  H03M1/0607 ,  H03M1/1295 ,  H03M1/60

Abstract: In one embodiment, a method for measuring current comprises generating a sensor current based on a current being measured. The method also comprises converting a combined current into a first frequency, wherein the combined current is a sum of the sensor current and a common-mode current, and converting the first frequency into a first count value. The method further comprises converting the common-mode current into a second frequency, converting the second frequency into a second count value, and subtracting the second count value from the first count value to obtain a current reading.

Abstract translation: 在一个实施例中，用于测量电流的方法包括基于正被测量的电流产生传感器电流。 该方法还包括将组合电流转换成第一频率，其中组合电流是传感器电流和共模电流之和，并将第一频率转换为第一计数值。 该方法还包括将共模电流转换成第二频率，将第二频率转换成第二计数值，并从第一计数值减去第二计数值以获得电流读数。

公开(公告)号：US20160047847A1

公开(公告)日：2016-02-18

申请号：US14459208

申请日：2014-08-13

Applicant: QUALCOMM Incorporated

Inventor： Junmou Zhang ,  Chuang Zhang ,  Yuancheng Christopher Pan ,  Nan Chen

IPC: G01R19/00 ,  G01R23/02 ,  G01R31/28

CPC classification number: G01R19/0084 ,  G01R19/16552 ,  G01R23/02 ,  G01R31/282

Abstract: Systems and methods for sensing voltage on a chip are described herein. In one embodiment, a voltage sensor comprises a voltage-controlled oscillator coupled to a voltage being sensed, and a plurality of transition detectors, wherein each of the transition detectors is coupled to a different location on the oscillator, and wherein each of the transition detectors is configured to count a number of transitions at the respective location over a time period. The voltage sensor also comprises an adder configured to add the numbers of transitions from the transition detectors to generate an output value that is approximately proportional to the voltage.

Abstract translation: 本文描述了用于感测芯片上的电压的系统和方法。 在一个实施例中，电压传感器包括耦合到被感测的电压的压控振荡器和多个转换检测器，其中每个转换检测器耦合到振荡器上的不同位置，并且其中每个转换检测器 被配置为在一段时间段内对相应位置的多个转换进行计数。 电压传感器还包括加法器，其被配置为将来自转换检测器的转移数目相加以产生大致与电压成比例的输出值。

公开(公告)号：US09816872B2

公开(公告)日：2017-11-14

申请号：US14300110

申请日：2014-06-09

Applicant: QUALCOMM Incorporated

Inventor： Junmou Zhang ,  Chuang Zhang ,  Nan Chen

IPC: G01K7/01 ,  G01K13/00 ,  G01K15/00

CPC classification number: G01K7/015 ,  G01K13/00 ,  G01K15/005

Abstract: Systems and methods for sensing temperature on a chip are described herein. In one embodiment, a temperature sensor comprises a first transistor having a gate, a second transistor having a gate coupled to the gate of the first transistor, and a bias circuit configured to bias the gates of the first and second transistors such that the first and second transistors operate in a sub-threshold region, and to generate a current proportional to a difference between a gate-to-source voltage of the first transistor and a gate-to-source voltage of the second transistor. The temperature sensor also comprises an analog-to-digital converter (ADC) configured to convert the current into a digital temperature reading.

公开(公告)号：US09793804B2

公开(公告)日：2017-10-17

申请号：US14630362

申请日：2015-02-24

Applicant: QUALCOMM Incorporated

Inventor： Chuang Zhang ,  James Thomas Doyle ,  Farsheed Mahmoudi ,  Amirali Shayan Arani

IPC: H02M3/158 ,  H02M1/12 ,  H02M3/07 ,  H02M7/483

CPC classification number: H02M3/158 ,  H02M1/126 ,  H02M3/07 ,  H02M7/483 ,  H02M2003/072

Abstract: A circuit including: a control system for a three-level buck converter, the three-level buck converter including multiple input switches, each of the input switches receiving one of a plurality of different pulse width modulated signals, the control system including: a first clock signal and a second clock signal, the second clock signal being a phase-shifted version of the first clock signal; ramp generating circuitry receiving the first and second clock signals and producing first and second ramp signals, respectively, from the first and second clock signals; a first comparing circuit receiving the first ramp signal and producing a first one of the pulse width modulated signals therefrom; and a second comparing circuit receiving the second ramp signal and producing a second one of the pulse width modulated signals therefrom.

公开(公告)号：US09450491B2

公开(公告)日：2016-09-20

申请号：US14630318

申请日：2015-02-24

Applicant: QUALCOMM Incorporated

Inventor： Chuang Zhang ,  James Thomas Doyle ,  Farsheed Mahmoudi ,  Amirali Shayan Arani

IPC: H02M1/15 ,  H02M3/158 ,  H02M7/483 ,  H02M3/07

CPC classification number: H02M3/158 ,  H02M1/14 ,  H02M7/483 ,  H02M2003/072

Abstract: A circuit including: a three-level buck converter having: a plurality of input switches and an inductor configured to receive a voltage from the plurality of input switches, the plurality of input switches coupled with a first capacitor and configured to charge and discharge the first capacitor; a second capacitor at an output of the buck converter; and a switched capacitor at an input node of the inductor, wherein the switched capacitor is smaller than either the first capacitor or the second capacitor.

Abstract translation: 一种电路，包括：三电平降压转换器，具有：多个输入开关和电感器，被配置为从所述多个输入开关接收电压，所述多个输入开关与第一电容器耦合并且被配置为对所述第一电容器进行充电和放电 电容器 在降压转换器的输出处的第二电容器; 以及在所述电感器的输入节点处的开关电容器，其中所述开关电容器小于所述第一电容器或所述第二电容器。

公开(公告)号：US20150355033A1

公开(公告)日：2015-12-10

申请号：US14300110

申请日：2014-06-09

Applicant: QUALCOMM Incorporated

Inventor： Junmou Zhang ,  Chuang Zhang ,  Nan Chen

IPC: G01K7/01 ,  G01K13/00

CPC classification number: G01K7/015 ,  G01K13/00 ,  G01K15/005

Abstract: Systems and methods for sensing temperature on a chip are described herein. In one embodiment, a temperature sensor comprises a first transistor having a gate, a second transistor having a gate coupled to the gate of the first transistor, and a bias circuit configured to bias the gates of the first and second transistors such that the first and second transistors operate in a sub-threshold region, and to generate a current proportional to a difference between a gate-to-source voltage of the first transistor and a gate-to-source voltage of the second transistor. The temperature sensor also comprises an analog-to-digital converter (ADC) configured to convert the current into a digital temperature reading

Abstract translation: 本文描述了用于感测芯片上的温度的系统和方法。 在一个实施例中，温度传感器包括具有栅极的第一晶体管，具有耦合到第一晶体管的栅极的栅极的第二晶体管，以及被配置为偏置第一和第二晶体管的栅极的偏置电路， 第二晶体管在子阈值区域中工作，并且产生与第一晶体管的栅极 - 源极之间的电压和第二晶体管的栅极 - 源极间电压之间的差成比例的电流。 温度传感器还包括被配置为将电流转换成数字温度读数的模拟 - 数字转换器（ADC）