公开(公告)号：US08957659B2

公开(公告)日：2015-02-17

申请号：US13779197

申请日：2013-02-27

Applicant: Seiko Instruments Inc.

Inventor： Manabu Fujimura ,  Takashi Imura ,  Yuji Kobayashi

IPC: G05F1/40 ,  G05F1/10

CPC classification number: G05F1/10 ,  G05F1/575

Abstract: Provided is a voltage regulator having improved transient response characteristics even when a load current is switched from a light load to a heavy load. The voltage regulator includes, to a gate of a detection transistor constituting an output current detection circuit: a resistive element for interrupting the gate of the detection transistor from an output terminal of a differential amplifier circuit in an AC manner; and a capacitive element connected to an output terminal of the voltage regulator in an AC manner.

Abstract translation: 提供了即使当负载电流从轻负载切换到重负载时，具有改善的瞬态响应特性的电压调节器。 电压调节器包括构成输出电流检测电路的检测晶体管的栅极：用于以AC方式从差分放大器电路的输出端中断检测晶体管的栅极的电阻元件; 以及以AC方式连接到电压调节器的输出端子的电容元件。

公开(公告)号：US09618951B2

公开(公告)日：2017-04-11

申请号：US14512732

申请日：2014-10-13

Applicant: Seiko Instruments Inc.

Inventor： Yuji Kobayashi ,  Manabu Fujimura

IPC: G05F1/56 ,  G05F1/46 ,  G05F1/567

CPC classification number: G05F1/56 ,  G05F1/468 ,  G05F1/567

Abstract: Provided is a voltage regulator capable of keeping the accuracy of an output voltage thereof even at high temperature. The voltage regulator includes: a reference voltage circuit configured to output a reference voltage; an output transistor configured to output an output voltage; a voltage divider circuit configured to divide the output voltage to output a divided voltage; an error amplifier circuit configured to amplify a difference between the reference voltage and the divided voltage, and output the amplified difference to control a gate of the output transistor; a switching circuit configured to switch the divided voltage of the voltage divider circuit; and a temperature detection circuit configured to output a signal in accordance with temperature to control the switching circuit.

公开(公告)号：US09141121B2

公开(公告)日：2015-09-22

申请号：US14015112

申请日：2013-08-30

Applicant: Seiko Instruments Inc.

Inventor： Yotaro Nihei ,  Manabu Fujimura

IPC: G05F1/571 ,  G05F1/575

CPC classification number: G05F1/571 ,  G05F1/575

Abstract: Provided is a voltage regulator capable of suppressing excessive overshoot at the output terminal when the power supply fluctuates in a non-regulate state. The voltage regulator includes: an error amplification circuit that amplifies a difference between reference voltage and divided voltage, thus controlling a gate of an output transistor; an amplifier that compares the reference voltage and the divided voltage to detect overshoot at the output voltage; a first transistor that lets current that is proportional to current flowing through the output transistor pass therethrough; a current mirror circuit that mirrors current that is proportional to the current flowing through the output transistor; and a first bias circuit connected to the amplifier via the current mirror circuit, the first bias circuit increasing bias current of the amplifier to increase a response speed.

Abstract translation: 提供一种电压调节器，当电源在非调节状态波动时，能够抑制输出端子处的过度过冲。 电压调节器包括：误差放大电路，其放大参考电压和分压之间的差，从而控制输出晶体管的栅极; 放大器，用于比较参考电压和分压，以检测输出电压的过冲; 使流过输出晶体管的电流成比例的电流的第一晶体管通过其中; 电流镜电路，其反映与流过输出晶体管的电流成比例的电流; 以及通过电流镜电路连接到放大器的第一偏置电路，第一偏置电路增加放大器的偏置电流以增加响应速度。