公开(公告)号：US09207694B2

公开(公告)日：2015-12-08

申请号：US14273156

申请日：2014-05-08

Applicant: Seiko Instruments Inc.

Inventor： Akihito Yahagi ,  Takashi Imura

IPC: G05F1/573 ,  G05F1/56 ,  G05F1/565 ,  G05F1/575

CPC classification number: G05F1/56 ,  G05F1/565 ,  G05F1/573 ,  G05F1/575

Abstract: Provided is a voltage regulator capable of accurately adjusting a tail current of a differential amplifier circuit without adding a test terminal. The voltage regulator includes: a constant current circuit for causing the tail current of the differential amplifier circuit to flow; a protection circuit; a current output circuit for outputting a current of the constant current circuit to a test terminal for measuring characteristics of the protection circuit; a switch circuit for stopping a function of the protection circuit; and a fuse provided between the test terminal and the current output circuit.

Abstract translation: 提供了一种能够在不添加测试端子的情况下精确地调整差分放大器电路的尾电流的电压调节器。 电压调节器包括：恒流电路，用于使差分放大器电路的尾电流流动; 保护电路; 电流输出电路，用于将恒流电路的电流输出到用于测量保护电路的特性的测试端子; 用于停止保护电路的功能的开关电路; 以及设置在测试端子和电流输出电路之间的保险丝。

公开(公告)号：US08896277B2

公开(公告)日：2014-11-25

申请号：US13718451

申请日：2012-12-18

Applicant: Seiko Instruments Inc.

Inventor： Akihito Yahagi ,  Takashi Imura

IPC: G05F1/00 ,  G05F1/625 ,  H02M1/00 ,  H02M3/156

CPC classification number: G05F1/625 ,  G05F1/468 ,  H02M3/156 ,  H02M2001/0032

Abstract: Provided is a voltage regulator including a soft-start circuit having a small area and capable of suppressing an inrush current by causing a reference voltage circuit to rise gently with time. In the soft-start circuit, a capacitor is connected to an output of a reference voltage circuit driven by a constant current of a constant current circuit, and hence the soft-start circuit can raise a reference voltage gently to prevent an inrush current with a small area. After the end of a soft-start period, the constant current circuit is disconnected, and the reference voltage circuit is driven by a power source. Thus, the operation becomes stable.

Abstract translation: 提供一种电压调节器，其包括具有小面积的软启动电路，并且能够通过使基准电压电路随时间缓慢上升而抑制浪涌电流。 在软启动电路中，电容器连接到由恒流电路的恒定电流驱动的参考电压电路的输出，因此软启动电路可以轻轻地提高参考电压，以防止浪涌电流 小区域。 在软启动周期结束后，恒流电路断开，参考电压电路由电源驱动。 因此，操作变得稳定。

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：US08766610B2

公开(公告)日：2014-07-01

申请号：US13742973

申请日：2013-01-16

Applicant: Seiko Instruments Inc.

Inventor： Takashi Imura

IPC: G05F1/56

CPC classification number: H03F1/223 ,  G05F1/56 ,  H03F3/45179 ,  H03F3/45183 ,  H03F3/45744 ,  H03F2203/45166 ,  H03F2203/45478 ,  H03F2203/45681 ,  H03F2203/45702

Abstract: Provided is a voltage regulator capable of reducing an influence of an offset to obtain an accurate output voltage. The voltage regulator includes: a first stage amplifier for amplifying and outputting a difference between a reference voltage and a divided voltage obtained by dividing a voltage output by an output transistor, to thereby control a gate of the output transistor; and a cascode amplifier circuit, in which the first stage amplifier includes: a first high breakdown voltage NMOS transistor as an input transistor; and an NMOS transistor as a tail current source, and in which the cascode amplifier circuit includes a second high breakdown voltage NMOS transistor as a cascode transistor.

Abstract translation: 提供了能够减小偏移的影响以获得精确的输出电压的电压调节器。 电压调节器包括：第一级放大器，用于放大和输出参考电压和通过分压由输出晶体管输出的电压而获得的分压，从而控制输出晶体管的栅极; 和级联放大器电路，其中第一级放大器包括：作为输入晶体管的第一高击穿电压NMOS晶体管; 以及作为尾电流源的NMOS晶体管，并且其中共源共栅放大器电路包括作为共源共栅晶体管的第二高击穿电压NMOS晶体管。