公开(公告)号：US20160301301A1

公开(公告)日：2016-10-13

申请号：US15038561

申请日：2015-01-14

Applicant: MediaTek Inc.

Inventor： Chien-Wei KUAN ,  Yen-Hsun HSU ,  Tun-Shih CHEN

IPC: H02M3/04 ,  H02M1/08

CPC classification number: H02M3/04 ,  H02M1/08 ,  H02M3/156 ,  H02M2001/0009 ,  H02M2001/0025 ,  H02M2001/0032 ,  H02M2003/1566 ,  Y02B70/16

Abstract: A voltage supply circuit is provided. The voltage supply circuit may operate at a first or second mode to generate an output voltage at an output node. The voltage supply circuit includes a compensation circuit, a comparator circuit, an inductor, and a driver circuit. The compensation circuit generates a compensation signal according to a feedback signal related to the output voltage. The comparator circuit compares the compensation signal with a first reference signal to generate a comparison signal. The inductor is coupled to the output node. The driver circuit receives the comparison signal and generates a driving voltage to the inductor according to the comparison signal. When the voltage supply circuit enters the second mode from the first mode, a duty of the comparison signal is increased to broaden an operation bandwidth of the voltage supply circuit in a predetermined period at the second mode.

Abstract translation: 提供电源电路。 电压供应电路可以在第一或第二模式下操作，以在输出节点处产生输出电压。 电压电路包括补偿电路，比较器电路，电感器和驱动电路。 补偿电路根据与输出电压有关的反馈信号产生补偿信号。 比较器电路将补偿信号与第一参考信号进行比较以产生比较信号。 电感器耦合到输出节点。 驱动电路接收比较信号，并根据比较信号产生对电感器的驱动电压。 当电压供给电路从第一模式进入第二模式时，增加比较信号的占空比，以在第二模式下的预定时段中扩大电压供应电路的工作带宽。

公开(公告)号：US20200244225A1

公开(公告)日：2020-07-30

申请号：US16728193

申请日：2019-12-27

Applicant: MEDIATEK INC.

Inventor： Shih-Mei LIN ,  Chien-Wei KUAN ,  Che-Hao MENG ,  Chen-Yen HO

IPC: H03F1/02 ,  H03F3/21

Abstract: A power supply configured to supply a modulated voltage to a power amplifier is shown. The power supply has an alternating current (AC) component generator, a direct current (DC) component generator, and a transition accelerator. The AC component generator generates an AC component of the modulated voltage according to an envelope tracking signal. The DC component generator generates a DC component of the modulated voltage according to the operational voltage range of the power amplifier. The transition accelerator is coupled to an output terminal of the DC component generator to speed up the transition of the modulated voltage.

公开(公告)号：US20190140597A1

公开(公告)日：2019-05-09

申请号：US16040594

申请日：2018-07-20

Applicant: MEDIATEK Inc.

Inventor： Shih-Mei LIN ,  Che-Hao MENG ,  Da-Wei SUNG ,  Chien-Wei KUAN

IPC: H03F1/02 ,  H02M3/158 ,  H02M3/335 ,  G05F1/565

Abstract: A supply modulator, a modulated power supply circuit, and associated control method are provided. The modulated power supply circuit includes the supply modulator and a DC-DC voltage converter, and the supply modulator includes a linear amplifier and a switching converter. The linear amplifier generates an AC component of a modulated voltage according to a regulated voltage and an envelope tracking signal. The supply voltage is converted to the regulated voltage by the DC-DC voltage converter, and the regulated voltage is greater than or less than the supply voltage. The switching converter includes a step-down circuit and a path selection circuit. The path selection circuit selects one of the supply voltage and the regulated voltage as a DC input voltage. The step-down circuit converts the DC input voltage to a DC component of the modulated voltage which is less than the DC input voltage.

公开(公告)号：US20160294376A1

公开(公告)日：2016-10-06

申请号：US15038588

申请日：2015-01-14

Applicant: MEDIATEK INC.

Inventor： Chien-Wei KUAN ,  Yen-Hsun HSU ,  Tun-Shih CHEN

IPC: H03K17/00

CPC classification number: H03K17/005 ,  H02M3/1584 ,  H02M2001/0032 ,  H02M2001/0048 ,  Y02B70/1491 ,  Y02B70/16

Abstract: A voltage supply circuit is provided. The voltage supply circuit is capable of operating at a first mode and generates a loading current at an output node. The voltage supply circuit includes a plurality of inductors and a plurality of drier circuits. The plurality of inductors are coupled to the output node. Each inductor has an inductance value. The plurality driver circuits are coupled to the plurality of inductors respectively. The inductance value of a first inductor among the plurality of inductors is greater than the inductance values of the other inductor.

Abstract translation: 提供电源电路。 电压供应电路能够在第一模式下操作并且在输出节点处产生负载电流。 电压供给电路包括多个电感器和多个干燥电路。 多个电感器耦合到输出节点。 每个电感都有一个电感值。 多个驱动电路分别耦合到多个电感器。 多个电感器中的第一电感器的电感值大于另一个电感器的电感值。

公开(公告)号：US20160301302A1

公开(公告)日：2016-10-13

申请号：US15038575

申请日：2015-01-14

Applicant: MEDIATEK INC

Inventor： Chien-Wei KUAN ,  Yen-Hsun HSU ,  Tun-Shih CHEN

IPC: H02M3/04 ,  H02M1/08

CPC classification number: H02M3/158 ,  H02M1/08 ,  H02M3/04 ,  H02M3/1584 ,  H02M2001/0009 ,  H02M2001/0019 ,  H02M2003/1586

Abstract: A voltage converter is provided. The voltage converter includes a compensation circuit, a first comparator circuit, a first inductor, a first driver circuit, and a phase-lag circuit. The compensation circuit generates a first compensation signal according to a loading state of the voltage converter. The first comparator circuit compares the first compensation signal and a first reference signal to generate a first comparison signal. The first driver circuit generates a first driving voltage to the first inductor according to the first comparison signal. The phase-lag circuit is coupled between the first comparison circuit and the first driver. The phase-lag circuit modifies a duty of the first comparison signal for changing a first inductor current following the first inductor.

Abstract translation: 提供电压转换器。 电压转换器包括补偿电路，第一比较器电路，第一电感器，第一驱动器电路和相位滞后电路。 补偿电路根据电压转换器的负载状态产生第一补偿信号。 第一比较器电路比较第一补偿信号和第一参考信号以产生第一比较信号。 第一驱动电路根据第一比较信号产生到第一电感器的第一驱动电压。 相位滞后电路耦合在第一比较电路和第一驱动器之间。 相位滞后电路修改用于改变第一电感器之后的第一电感器电流的第一比较信号的占空比。

公开(公告)号：US20140361760A1

公开(公告)日：2014-12-11

申请号：US13912821

申请日：2013-06-07

Applicant: MediaTek Inc.

Inventor： Chien-Wei KUAN ,  Jyh-Pyng LAY ,  Chih-Ching YU ,  Yuh-Long YEH

IPC: G05F1/46

CPC classification number: G05F1/46

Abstract: A voltage regulation circuit is provided. The voltage regulation circuit regulates a level of a supply voltage provided by an automotive battery. The voltage regulation circuit includes a selector and an error amplifier. The selector receives a plurality of predetermined voltages and selects one of the plurality of predetermined voltages according to a control signal to serve as a first reference voltage. The error amplifier generates an error signal according to the first reference voltage and a feedback signal. The feedback signal is related to the supply voltage. The voltage regulation circuit regulates the level of the supply voltage according to the error signal.

Abstract translation: 提供电压调节电路。 电压调节电路调节由汽车电池提供的电源电压的电平。 电压调节电路包括选择器和误差放大器。 选择器接收多个预定电压，并根据控制信号选择多个预定电压中的一个作为第一参考电压。 误差放大器根据第一参考电压和反馈信号产生误差信号。 反馈信号与电源电压有关。 电压调节电路根据误差信号调节电源电压的电平。