公开(公告)号：US10969816B2

公开(公告)日：2021-04-06

申请号：US16659686

申请日：2019-10-22

Applicant: QUALCOMM Incorporated

Inventor： Sameer Wadhwa ,  Yi Wang ,  Lennart Karl-Axel Mathe

IPC: G05F1/10 ,  G05F3/02 ,  G05F3/26 ,  G06F3/041 ,  G05F3/24

Abstract: In certain aspects, a bias generation circuit comprises a bias voltage generator. The bias voltage generator has a main NMOS transistor having a drain and a gate of the main NMOS transistor both coupled to a first terminal, a main resistor having a first main resistor terminal and a second main resistor terminal, wherein the first main resistor terminal couples to a source of the main NMOS transistor; and a main PMOS transistor having a source of the main PMOS transistor coupled to the second main resistor terminal and a drain and a gate of the main PMOS transistor both coupled to a second terminal, wherein the second terminal couples to a main ground. The bias generation circuit further comprises an array of sensors coupled to the first terminal and the second terminal.

公开(公告)号：US09837962B2

公开(公告)日：2017-12-05

申请号：US13911902

申请日：2013-06-06

Applicant: QUALCOMM Incorporated

Inventor： Lennart Karl-Axel Mathe ,  Yunfei Shi

IPC: H03G3/20 ,  H03F1/02 ,  H03F3/195

CPC classification number: H03F1/02 ,  H03F1/0222 ,  H03F1/0227 ,  H03F3/195 ,  H03F2200/102 ,  H03F2200/432 ,  H03F2200/435 ,  H03F2200/504

Abstract: Techniques for efficiently generating a variable boosted supply voltage for an amplifier and/or other circuits are disclosed. In an exemplary design, an apparatus includes an amplifier, a boost converter, and a boost controller. The amplifier receives an envelope signal and a variable boosted supply voltage and provides an output voltage and an output current. The boost converter receives a power supply voltage and at least one signal determined based on the envelope signal and generates the variable boosted supply voltage based on the power supply voltage and the at least one signal. The boost controller generates the at least one signal (e.g., an enable signal and/or a threshold voltage) for the boost converter based on the envelope signal and/or the output voltage. The boost converter is enabled or disabled based on the enable signal and generates the variable boosted supply voltage based on the power supply voltage and the threshold voltage.

公开(公告)号：US09306520B2

公开(公告)日：2016-04-05

申请号：US13752241

申请日：2013-01-28

Applicant: QUALCOMM Incorporated

Inventor： Lennart Karl-Axel Mathe ,  Joseph D Rutkowski ,  Song S Shi

IPC: H03G3/20 ,  H03G1/00 ,  H03F1/02

CPC classification number: H03G1/0005 ,  H03F1/0238

Abstract: Techniques for preventing reverse current in applications wherein a tracking supply voltage is placed in parallel with a switching power stage. The tracking supply voltage may be boosted to a level higher than a battery supply voltage using, e.g., a boost converter. In an aspect, a negative current detection block is provided to detect negative current flow from the boosted tracking supply voltage to the battery supply voltage. A high-side switch of the switching power stage may be disabled in response to detecting the negative current. To prevent false tripping, the tracking supply voltage may be further compared with the battery supply voltage, and a latch may be provided to further control the high-side switch.

Abstract translation: 在跟踪电源电压与开关功率级并联放置的应用中用于防止反向电流的技术。 使用例如升压转换器，跟踪电源电压可以升高到高于电​​池电源电压的电平。 在一方面，提供负电流检测块以检测从升压的跟踪电源电压到电池电源电压的负电流。 可以响应于检测到负电流而禁用开关功率级的高侧开关。 为了防止错误跳闸，可以将跟踪电源电压进一步与电池电源电压进行比较，并且可以提供锁存器以进一步控制高侧开关。

公开(公告)号：US09130457B2

公开(公告)日：2015-09-08

申请号：US13659682

申请日：2012-10-24

Applicant: QUALCOMM Incorporated

Inventor： Song S Shi ,  Lennart Karl-Axel Mathe ,  Yunfei Shi

IPC: H02M3/158 ,  H02M3/157 ,  H02M3/156 ,  H02M1/00

CPC classification number: H02M3/1588 ,  H02M3/156 ,  H02M3/157 ,  H02M2001/0009 ,  Y02B70/1466

Abstract: Simple and efficient techniques for closed loop control of a boost converter. In an aspect, a current feed-forward (CFF) mode of operation includes providing current information to a control logic block controlling transistor switches of the boost converter to advantageously smooth the signals present in the closed loop control of the system. In another aspect, a modified peak current (MPC) mode of operation includes providing a simplified control mechanism based on a peak current mode of operation. Both CFF mode and MPC mode may share similar circuit elements, allowing a single implementation to selectively implement either of these modes of control. Further techniques are provided for determining average current information for the logic block.

Abstract translation: 用于升压转换器闭环控制的简单有效的技术。 在一方面，电流前馈（CFF）操作模式包括向控制逻辑块提供电流信息，所述控制逻辑块控制升压转换器的晶体管开关，以有利地平滑存在于系统的闭环控制中的信号。 在另一方面，修改的峰值电流（MPC）操作模式包括基于峰值电流操作模式提供简化的控制机制。 CFF模式和MPC模式都可以共享类似的电路元件，允许单个实现选择性地实现这些控制模式。 提供用于确定逻辑块的平均当前信息的其它技术。

公开(公告)号：US08901989B2

公开(公告)日：2014-12-02

申请号：US13841703

申请日：2013-03-15

Applicant: QUALCOMM Incorporated

Inventor： Narendra Singh Mehta ,  Lennart Karl-Axel Mathe

IPC: H03K17/14 ,  H03K17/06

CPC classification number: H03K17/145 ,  H03K17/063

Abstract: An adaptive gate drive circuit that can generate a gate bias voltage with temperature compensation for a MOSFET is disclosed. The adaptive gate drive circuit may generate the gate bias voltage with variable drive capability to combat higher gate leakage current of the MOSFET at higher temperature. In one design, an apparatus includes a control circuit and a gate drive circuit. The control circuit generates at least one control signal having a variable frequency determined based on a sensed temperature of the MOSFET. For example, a clock divider ratio may be determined based on the sensed temperature of the MOSFET, an input clock signal may be divided based on the clock divider ratio to obtain a variable clock signal, and the control signal(s) may be generated based on the variable clock signal. The gate drive circuit generates a bias voltage for the MOSFET based on the control signal(s).

Abstract translation: 公开了可以产生具有MOSFET的温度补偿的栅极偏置电压的自适应栅极驱动电路。 自适应栅极驱动电路可以产生具有可变驱动能力的栅极偏置电压，以在较高温度下抵抗MOSFET的较高栅极漏电流。 在一种设计中，装置包括控制电路和栅极驱动电路。 控制电路产生至少一个控制信号，该控制信号具有基于感测到的MOSFET温度确定的可变频率。 例如，可以基于感测到的MOSFET的温度来确定时钟分频比，可以基于时钟分频比对输入时钟信号进行分频以获得可变时钟信号，并且可以基于 对可变时钟信号。 栅极驱动电路根据控制信号产生MOSFET的偏置电压。

公开(公告)号：US20140210559A1

公开(公告)日：2014-07-31

申请号：US13752287

申请日：2013-01-28

Applicant: QUALCOMM INCORPORATED

Inventor： Lennart Karl-Axel Mathe ,  Pengfei Li ,  Song S. Shi ,  Yunfei Shi ,  Joseph D. Rutkowski

IPC: H03G1/00

CPC classification number: H03F1/0222 ,  H03F1/0227 ,  H03F3/19 ,  H03F3/21 ,  H03F3/245 ,  H03F2200/102 ,  H03F2200/451

Abstract: Techniques for dynamically generating a headroom voltage for an envelope tracking system. In an aspect, an initial headroom voltage is updated when a signal from a power amplifier (PA) indicates that the PA headroom is insufficient. The initial headroom voltage may be updated to an operating headroom voltage that includes the initial voltage plus a deficiency voltage plus a margin. In this manner, the operating headroom voltage may be dynamically selected to minimize power consumption while still ensuring that the PA is linear. In a further aspect, a specific exemplary embodiment of a headroom voltage generator using a counter is described.

Abstract translation: 用于动态产生包络跟踪系统的净空电压的技术。 在一方面，当来自功率放大器（PA）的信号指示PA余量不足时，更新初始余量电压。 初始余量电压可以被更新为包括初始电压加上缺陷电压加上余量的操作净空电压。 以这种方式，可以动态选择操作净空电压以最小化功耗，同时仍然确保PA是线性的。 在另一方面，描述了使用计数器的净空电压发生器的具体示例性实施例。

公开(公告)号：US20140111276A1

公开(公告)日：2014-04-24

申请号：US13659667

申请日：2012-10-24

Applicant: QUALCOMM INCORPORATED

Inventor： Lennart Karl-Axel Mathe ,  Song Stone Shi ,  Yunfei Shi

IPC: H03G99/00

CPC classification number: H03F1/0238 ,  H03F2200/102 ,  H03F2200/435

Abstract: Techniques for controlling boost converter operation in an envelope tracking (ET) system. In an aspect, an enable generation block is provided to generate an enable signal for a boost converter, wherein the enable signal is turned on in response to detecting that a sum of a first headroom voltage and an enable peak of a tracking supply voltage is greater than an amplifier supply voltage of the ET system. The enable signal may be turned on for a predetermined enable on duration. In another aspect, a target generation block is provided to generate a target voltage for the boost converter, wherein the target voltage comprises the sum of a second headroom voltage and a target peak of the tracking supply voltage.

Abstract translation: 用于控制包络跟踪（ET）系统中升压转换器操作的技术。 在一方面中，提供使能生成块以产生用于升压转换器的使能信号，其中响应于检测到第一余量电压和跟踪电源电压的使能峰值之和更大而导通使能信号 比ET系统的放大器电源电压高。 使能信号可以接通预定使能持续时间。 在另一方面，提供目标产生模块以产生升压转换器的目标电压，其中目标电压包括第二余量电压和跟踪电源电压的目标峰值之和。

公开(公告)号：US20140111170A1

公开(公告)日：2014-04-24

申请号：US13659682

申请日：2012-10-24

Applicant: QUALCOMM INCORPORATED

Inventor： Song Stone Shi ,  Lennart Karl-Axel Mathe ,  Yunfel Shi

IPC: G05F1/10

CPC classification number: H02M3/1588 ,  H02M3/156 ,  H02M3/157 ,  H02M2001/0009 ,  Y02B70/1466

Abstract: Simple and efficient techniques for closed loop control of a boost converter. In an aspect, a current feed-forward (CFF) mode of operation includes providing current information to a control logic block controlling transistor switches of the boost converter to advantageously smooth the signals present in the closed loop control of the system. In another aspect, a modified peak current (MPC) mode of operation includes providing a simplified control mechanism based on a peak current mode of operation. Both CFF mode and MPC mode may share similar circuit elements, allowing a single implementation to selectively implement either of these modes of control. Further techniques are provided for determining average current information for the logic block.

Abstract translation: 用于升压转换器闭环控制的简单有效的技术。 在一方面，电流前馈（CFF）操作模式包括向控制逻辑块提供电流信息，所述控制逻辑块控制升压转换器的晶体管开关，以有利地平滑存在于系统的闭环控制中的信号。 在另一方面，修改的峰值电流（MPC）操作模式包括基于峰值电流操作模式提供简化的控制机制。 CFF模式和MPC模式都可以共享类似的电路元件，允许单个实现选择性地实现这些控制模式。 提供用于确定逻辑块的平均当前信息的其它技术。

公开(公告)号：US20140028357A1

公开(公告)日：2014-01-30

申请号：US13841703

申请日：2013-03-15

Applicant: QUALCOMM INCORPORATED

Inventor： Narendra Singh Mehta ,  Lennart Karl-Axel Mathe

IPC: H03K17/14

CPC classification number: H03K17/145 ,  H03K17/063

Abstract: An adaptive gate drive circuit that can generate a gate bias voltage with temperature compensation for a MOSFET is disclosed. The adaptive gate drive circuit may generate the gate bias voltage with variable drive capability to combat higher gate leakage current of the MOSFET at higher temperature. In one design, an apparatus includes a control circuit and a gate drive circuit. The control circuit generates at least one control signal having a variable frequency determined based on a sensed temperature of the MOSFET. For example, a clock divider ratio may be determined based on the sensed temperature of the MOSFET, an input clock signal may be divided based on the clock divider ratio to obtain a variable clock signal, and the control signal(s) may be generated based on the variable clock signal. The gate drive circuit generates a bias voltage for the MOSFET based on the control signal(s).

Abstract translation: 公开了可以产生具有MOSFET的温度补偿的栅极偏置电压的自适应栅极驱动电路。 自适应栅极驱动电路可以产生具有可变驱动能力的栅极偏置电压，以在较高温度下抵抗MOSFET的较高栅极漏电流。 在一种设计中，装置包括控制电路和栅极驱动电路。 控制电路产生至少一个控制信号，该控制信号具有基于感测到的MOSFET温度确定的可变频率。 例如，可以基于感测到的MOSFET的温度来确定时钟分频比，可以基于时钟分频比对输入时钟信号进行分频以获得可变时钟信号，并且可以基于 对可变时钟信号。 栅极驱动电路根据控制信号产生MOSFET的偏置电压。