公开(公告)号：US20180234085A1

公开(公告)日：2018-08-16

申请号：US15950327

申请日：2018-04-11

Applicant: ALPS ELECTRIC CO., LTD.

Inventor： Akira ASAO ,  Kiyoshi SASAI ,  Tatsumi FUJIYOSHI

IPC: H03K3/012 ,  H03K5/00 ,  G06F3/044 ,  G06F3/041

CPC classification number: H03K3/012 ,  G06F1/02 ,  G06F3/0416 ,  G06F3/044 ,  G06F7/16 ,  G06G7/16 ,  H03K5/00006

Abstract: In a sine-wave multiplier, signal components included in an output signal Qu1 and corresponding to the product of a third-order harmonic component of a first square wave W1 and an input signal Vi and the product of a fifth-order harmonic component of the first square wave W1 and the input signal Vi are offset by a signal component included in an output signal Qu2 and corresponding to the product of a fundamental component of a second square wave W2 and the input signal Vi and a signal component included in an output signal Qu3 and corresponding to the product of a fundamental component of a second square wave W3 and the input signal Vi.

公开(公告)号：US20180012045A1

公开(公告)日：2018-01-11

申请号：US15713903

申请日：2017-09-25

Applicant: ALPS ELECTRIC CO., LTD.

Inventor： Tatsumi FUJIYOSHI ,  Shinichi SAGAWAI ,  Kiyoshi SASAI

IPC: G06G7/16

CPC classification number: G06F7/548 ,  G06G7/16 ,  H03D7/1425 ,  H03D7/1466 ,  H03D7/1483 ,  H03D2200/006 ,  H03D2200/0074 ,  H03D2200/0086

Abstract: Provided is a sine wave multiplication device of simple configuration, broad input signal level range, and minimal fluctuation in characteristics due to temperature. A signal component that corresponds to a product of an input signal Si and the third harmonic wave of a first square wave W1 included in an output signal Su1; and a signal component that corresponds to a product of the input signal Si and the fifth harmonic wave of the first square wave W1 is canceled by: a signal component that corresponds to a product of the input signal Si and the fundamental wave of a second square wave W2 included in an output signal Su2; and a signal component that corresponds to a product of the input signal Si and the fundamental wave of a second square wave W3 included in an output signal Su3.

公开(公告)号：US20150222256A1

公开(公告)日：2015-08-06

申请号：US14573234

申请日：2014-12-17

Applicant: ALPS ELECTRIC CO., LTD.

Inventor： Kiyoshi SASAI

IPC: H03K5/1252

CPC classification number: H03K5/1252 ,  G06G7/184 ,  G06G7/186 ,  H03H11/126

Abstract: In an integration mode, since a switch becomes OFF, a positive feedback path from an output terminal of an operational amplifier to a positive input terminal is blocked. Therefore, oscillation can be prevented even when a voltage of a signal line connected to a reference voltage supply point varies due to an impedance of the reference voltage supply point not being 0. In the integration mode, a resistor and a capacitor function as a noise filter. Further, in a reset mode, a switch becomes ON, and charge is accumulated in the capacitor depending on a reference voltage of the reference voltage supply point.

Abstract translation: 在积分模式中，由于开关变为OFF，所以从运算放大器的输出端到正输入端的正反馈路径被阻断。 因此，即使在与基准电压供给点连接的信号线的电压由于基准电压供给点的阻抗不为0而变化的情况下也能够防止振荡。在积分模式中，电阻和电容器作为噪声起作用 过滤。 此外，在复位模式下，开关变为ON，并且根据参考电压提供点的参考电压而在电容器中累积电荷。