Title:
INSTRUMENTATION DEVICE HAVING PULSE OUTPUT FUNCTION
Document Type and Number:
WIPO Patent Application WO/2017/047823
Kind Code:
A1
Abstract:
Provided is an instrumentation device having a pulse output function, with which it is possible to prevent failure of a switch element even when wired incorrectly. A counting unit 1 is provided with: a positive power supply terminal 2; a negative power supply terminal 3; a signal terminal 4; a control circuit 6; an NPN-type transistor 7; a feedback circuit 8; a PTC thermistor 9; and an N-channel MOSFET 10. The collector terminal of the NPN-type transistor 7 is connected to the positive power supply terminal 2, the emitter terminal thereof is connected to the negative power supply terminal 3, and the base terminal thereof is connected to the control circuit 6. The PTC thermistor 9 is a resettable protection element and is connected in series to the signal terminal 4. The drain terminal of the N-channel MOSFET 10 is connected via the PTC thermistor 9 to the signal terminal 4, the source terminal thereof is connected to the negative power supply terminal 3 downstream of the feedback circuit 8, and the gate terminal thereof is connected to the control circuit 6.
Inventors:
KITANO TETSUSHI (JP)
NAKAYAMA NORIAKI (JP)
TANABU YOSHIMINE (JP)
WASHIO KENJI (JP)
NAKAYAMA NORIAKI (JP)
TANABU YOSHIMINE (JP)
WASHIO KENJI (JP)
Application Number:
PCT/JP2016/077920
Publication Date:
March 23, 2017
Filing Date:
September 14, 2016
Export Citation:
Assignee:
OVAL CORP (JP)
International Classes:
G01F1/00; G01F3/10; G01F15/06
Foreign References:
| JPS546473A | 1979-01-18 | |||
| US6181541B1 | 2001-01-30 | |||
| JP2007052679A | 2007-03-01 | |||
| JP2007047018A | 2007-02-22 |
Other References:
See also references of EP 3351907A4
Attorney, Agent or Firm:
MUTSUNA Tomoyuki et al. (JP)
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