公开(公告)号：US09106215B2

公开(公告)日：2015-08-11

申请号：US14188379

申请日：2014-02-24

Applicant: Seiko Instruments Inc.

Inventor： Kotaro Watanabe ,  Makoto Mitani

IPC: H03K5/19 ,  G01R29/02

CPC classification number: H03K5/19 ,  G01R29/02

Abstract: Provided is an oscillation stop detection circuit having low current consumption, which is capable of detecting stop of oscillation regardless of whether an input signal stops at High or Low and thereby accurately measuring an oscillation stop detection period. The oscillation stop detection circuit includes: a pulse generation circuit for outputting a one-shot pulse in synchronization with an oscillation signal input from an input terminal; a capacitor including one terminal connected to a first power supply terminal and another terminal connected to an output terminal; a constant current circuit connected between the first power supply terminal and the another terminal of the capacitor; and a switch circuit connected between an output terminal of the pulse generation circuit and the another terminal of the capacitor, for connecting the another terminal of the capacitor to a second power supply terminal based on the one-shot pulse.

Abstract translation: 提供一种具有低电流消耗的振荡停止检测电路，无论输入信号是停止在高还是低，从而能够精确地测量振荡停止检测周期，其能够检测振荡停止。 振荡停止检测电路包括：脉冲发生电路，用于与从输入端子输入的振荡信号同步地输出单触发脉冲; 电容器，包括连接到第一电源端子的一个端子和连接到输出端子的另一个端子; 连接在所述第一电源端子和所述电容器的另一端子之间的恒流电路; 以及连接在所述脉冲发生电路的输出端子和所述电容器的另一端子之间的开关电路，用于基于所述单触发脉冲将所述电容器的另一端子连接到第二电源端子。

公开(公告)号：US09933494B2

公开(公告)日：2018-04-03

申请号：US14656163

申请日：2015-03-12

Applicant: Seiko Instruments Inc.

Inventor： Makoto Mitani ,  Kotaro Watanabe

IPC: G01R31/40 ,  G01R19/00

CPC classification number: G01R31/40 ,  G01R19/0084

Abstract: To provide a voltage detection circuit in which the influence on a detection voltage by semiconductor manufacturing variations is small and which is small in current consumption. A voltage detection circuit is provided which detects a voltage, based on an output signal of a detection circuit and outputs a detection signal. The detection circuit includes a first MOS transistor unit which allows a first current to flow, a second MOS transistor unit which allows a second current to flow, and a current voltage conversion unit which converts each of the first current and the second current into a voltage and outputs the same as the detection signal. A voltage characteristic of the first current and a voltage characteristic of the second current are configured so as to be crossed with each other at a predetermined voltage.

公开(公告)号：US09437258B2

公开(公告)日：2016-09-06

申请号：US14844921

申请日：2015-09-03

Applicant: Seiko Instruments Inc.

Inventor： Makoto Mitani ,  Kotaro Watanabe

IPC: G11C7/00 ,  G11C7/06 ,  G11C7/10 ,  G11C7/22

CPC classification number: G11C7/062 ,  G11C7/067 ,  G11C7/106 ,  G11C7/22

Abstract: Provided is a data readout circuit capable of, even when a high voltage is applied during data read-out operation, preventing erroneous writing of the data and reading out the data correctly. The data readout circuit includes: a non-volatile storage element; a latch circuit including: an input inverter; an output inverter; and a MOS transistor; a first MOS transistor connected between the non-volatile storage element and the latch circuit; a second MOS transistor connected between the latch circuit and the first power supply terminal; a first bias circuit configured to bias a gate of the first MOS transistor; and a second bias circuit configured to bias the MOS transistor in the latch circuit, each of the first bias circuit and the second bias circuit being configured to output a predetermined bias voltage when the data in the non-volatile storage element is read out.

Abstract translation: 提供了一种数据读出电路，即使在数据读出操作期间施加高电压时，也能够防止数据的错误写入并正确地读出数据。 数据读出电路包括：非易失性存储元件; 锁存电路，包括：输入反相器; 输出变频器; 和MOS晶体管; 连接在非易失性存储元件和锁存电路之间的第一MOS晶体管; 连接在所述锁存电路和所述第一电源端子之间的第二MOS晶体管; 第一偏置电路，被配置为偏置所述第一MOS晶体管的栅极; 以及第二偏置电路，被配置为在所述锁存电路中偏置所述MOS晶体管，所述第一偏置电路和所述第二偏置电路中的每一个被配置为当所述非易失性存储元件中的数据被读出时输出预定的偏置电压。

公开(公告)号：US09111644B2

公开(公告)日：2015-08-18

申请号：US14029251

申请日：2013-09-17

Applicant: Seiko Instruments Inc.

Inventor： Kotaro Watanabe ,  Makoto Mitani

IPC: G11C29/04 ,  G11C7/02 ,  G11C7/10

CPC classification number: G11C29/04 ,  G11C7/02 ,  G11C7/106 ,  G11C7/1063

Abstract: Provided is a readout circuit capable of detecting inversion of retained data caused by a noise, such as static electricity. The readout circuit is configured to retain opposing data in a first latch circuit and a second latch circuit in a readout period so as to be capable of detecting an anomaly of the retained data by making use of the fact that the data in the first latch circuit and the second latch circuit are inverted in the same direction due to a noise, such as static electricity.

Abstract translation: 提供一种能够检测由诸如静电之类的噪声引起的保留数据的反转的读出电路。 读出电路被配置为在读出期间将相对数据保存在第一锁存电路和第二锁存电路中，以便能够通过利用第一锁存电路中的数据来检测保留数据的异常 并且第二锁存电路由于诸如静电的噪声而在相同的方向上反转。

公开(公告)号：US08885444B2

公开(公告)日：2014-11-11

申请号：US13785412

申请日：2013-03-05

Applicant: Seiko Instruments Inc.

Inventor： Makoto Mitani ,  Kotaro Watanabe

IPC: G04C3/00 ,  G04G3/00

CPC classification number: G04G3/00 ,  G04G19/04

Abstract: The analog electronic watch includes: a crystal oscillator; an oscillator circuit; a frequency divider circuit; an output control circuit; a constant voltage circuit; and a cell. The constant voltage circuit and the output control circuit are powered from the cell. The oscillator circuit and the frequency divider circuit are powered from the constant voltage circuit. The constant voltage circuit is capable of outputting a first constant voltage and a second constant voltage in a switchable manner. The second constant voltage is a voltage which is equal to or lower than a cell voltage. The first constant voltage is a voltage which is smaller than the second constant voltage. The constant voltage is switched to the second constant voltage in a period of outputting the motor drive pulse.

Abstract translation: 模拟电子手表包括：晶振; 振荡电路; 分频器电路; 输出控制电路; 恒压电路; 和一个单元格。 恒压电路和输出控制电路由电池供电。 振荡电路和分频电路由恒压电路供电。 恒压电路能够以可切换的方式输出第一恒定电压和第二恒定电压。 第二恒定电压是等于或低于电池电压的电压。 第一恒定电压是小于第二恒定电压的电压。 在输出电动机驱动脉冲的期间，将恒定电压切换到第二恒定电压。