公开(公告)号：WO2008144134A1

公开(公告)日：2008-11-27

申请号：PCT/US2008/060232

申请日：2008-04-14

Applicant: QUALCOMM Incorporated ,  WALKER, Brett C. ,  SHI, Song Stone

Inventor： WALKER, Brett C. ,  SHI, Song Stone

IPC: H03F3/217

CPC classification number: H03F3/217 ,  H03F2200/03 ,  H03F2200/345 ,  H03F2200/351

Abstract: Output circuits using pulse width modulation (PWM) and/or pulse density modulation (PDM) are described. In one aspect, a PWM output circuit includes a PWM modulator that operates based on a square wave signal instead of a sawtooth or triangular wave signal. In another aspect, a PDM output circuit includes a PDM modulator that uses variable reference voltages to reduce variations in switching frequency. In yet another aspect, a dual-mode output circuit supports both PWM and PDM and includes a pulse modulator and a class D amplifier. The pulse modulator performs PWM on an input signal if a PWM mode is selected and performs PDM on the input signal if a PDM mode is selected. The class D amplifier receives a driver signal from the pulse modulator and generates an output signal.

Abstract translation: 描述使用脉冲宽度调制（PWM）和/或脉冲密度调制（PDM）的输出电路。 一方面，PWM输出电路包括基于方波信号而不是锯齿波或三角波信号进行操作的PWM调制器。 在另一方面，PDM输出电路包括使用可变参考电压以减少开关频率变化的PDM调制器。 在另一方面，双模输出电路支持PWM和PDM，并且包括脉冲调制器和D类放大器。 如果选择了PWM模式，则脉冲调制器对输入信号执行PWM，如果选择了PDM模式，则在输入信号上执行PDM。 D类放大器从脉冲调制器接收驱动信号并产生一个输出信号。

公开(公告)号：WO2014066697A1

公开(公告)日：2014-05-01

申请号：PCT/US2013/066704

申请日：2013-10-24

Applicant: QUALCOMM INCORPORATED

Inventor： SHI, Song Stone ,  MATHE, Lennart Karl-Axel ,  SHI, Yunfei

IPC: H02M3/158 ,  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 (210) controlling transistor switches (ΝΙ,ΡΙ) of the boost converter (200) 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 (210).

Abstract translation: 用于升压转换器闭环控制的简单有效的技术。 在一个方面，当前的前馈CFF操作模式包括向控制逻辑块（210）提供电流信息，以控制升压转换器（200）的晶体管开关（＆Ngr; Igr，＆Rgr; Igr）以有利地 平滑系统闭环控制中存在的信号。 在另一方面，修改的峰值电流MPC的操作模式包括基于峰值电流工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。 提供了用于确定逻辑块（210）的平均当前信息的进一步的技术。

公开(公告)号：WO2014066694A1

公开(公告)日：2014-05-01

申请号：PCT/US2013/066701

申请日：2013-10-24

Applicant: QUALCOMM INCORPORATED

Inventor： MATHE, Lennart Karl-Axel ,  SHI, Song Stone ,  SHI, Yunfei

IPC: H03F1/02

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 (Ven) for a boost converter (110), wherein the enable signal (Ven) is turned on in response to detecting that a sum of a first headroom voltage and an enable peak of a tracking supply voltage (Vamp) is greater than an amplifier supply voltage (VDD_Amp) of the ET system. The enable signal (Ven) may be turned on for a predetermined enable on duration. In another aspect, a target generation block is provided to generate a target voltage (Vtarget) for the boost converter (110), wherein the target voltage (Vtarget) comprises the sum of a second headroom voltage and a target peak of the tracking supply voltage (Vamp).

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，提供使能生成块以产生用于升压转换器（110）的使能信号（Ven），其中响应于检测到第一余量电压和 使跟踪电源电压（Vamp）的峰值大于ET系统的放大器电源电压（VDD_Amp）。 使能信号（Ven）可以接通预定使能持续时间。 在另一方面，提供目标产生块以产生用于升压转换器（110）的目标电压（Vtarget），其中目标电压（Vtarget）包括第二余量电压和跟踪电源电压的目标峰值之和 （鞋面）。