Title:
WAVEFORM SHAPING CIRCUIT, SIGNAL GENERATION DEVICE, AND SIGNAL READING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/022388
Kind Code:
A1
Abstract:
[Problem] To achieve a configuration that does not include a diode susceptible to temperature. [Solution] The present invention is provided with: a capacitor 42c wherein one end section thereof has a difference signal Vd0 input thereto and the other end section thereof is connected to an output section 42b; an impedance element 42d wherein one end section thereof is connected to the other end section of the capacitor 42c and the other end section thereof has a target constant voltage Vtg applied thereto; a switch circuit SC that is composed of a series circuit of an impedance element 42e and a switch 42f without including a diode, wherein one end section of said switch circuit SC is connected to the output section 42b, and wherein the other end section of said switch circuit SC has the target constant voltage Vtg applied thereto; and a switch control circuit SWC that places the switch 42f into an ON state during a low-voltage period of an AC component of the difference signal Vd0 and that places the switch 42f into an OFF state during a high-voltage period of the AC component. The difference signal Vd0 is shaped into a single-ended signal Vd that has a peak-to-peak voltage equivalent to the peak-to-peak voltage of the AC component and the voltage of which during the low-voltage period becomes the target constant voltage Vtg, and the single-ended signal Vd is then output from the output section 42b.
Inventors:
YANAGISAWA KOICHI (JP)
IKEDA HIROYOSHI (JP)
KASAI SHIN (JP)
SAKAI TOMOHARU (JP)
IKEDA HIROYOSHI (JP)
KASAI SHIN (JP)
SAKAI TOMOHARU (JP)
Application Number:
PCT/JP2019/029048
Publication Date:
January 30, 2020
Filing Date:
July 24, 2019
Export Citation:
Assignee:
HIOKI ELECTRIC WORKS (JP)
International Classes:
H04L25/06; H03K5/003; H04L25/02
Foreign References:
| JP2013162159A | 2013-08-19 | |||
| JPH04132412A | 1992-05-06 | |||
| JP2018519703A | 2018-07-19 | |||
| US20090140849A1 | 2009-06-04 | |||
| JPH0828689B2 | 1996-03-21 | |||
| JP2006343109A | 2006-12-21 |
Other References:
See also references of EP 3829121A4
Attorney, Agent or Firm:
SAKAI Shinji (JP)
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