JPS5621043A - Automatic control circuit for bias of indicator - Google Patents

Automatic control circuit for bias of indicator

Info

Publication number
JPS5621043A
JPS5621043A JP9654779A JP9654779A JPS5621043A JP S5621043 A JPS5621043 A JP S5621043A JP 9654779 A JP9654779 A JP 9654779A JP 9654779 A JP9654779 A JP 9654779A JP S5621043 A JPS5621043 A JP S5621043A
Authority
JP
Japan
Prior art keywords
subtracter
indicator
count
voltage
bias
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9654779A
Other languages
Japanese (ja)
Inventor
Yutaka Fukushima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jeol Ltd
Original Assignee
Jeol Ltd
Nihon Denshi KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jeol Ltd, Nihon Denshi KK filed Critical Jeol Ltd
Priority to JP9654779A priority Critical patent/JPS5621043A/en
Publication of JPS5621043A publication Critical patent/JPS5621043A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE:To permit a highly sensitive monitoring of voltage fluctuation by optimizing the bias voltage of the indicator so that the pointer is invariably within the scale. CONSTITUTION:A resolution signal Vr obtained from a nuclear magnetic resonance (NMR) apparatus and corresponding to the peak voltage of a v-mode NMR signal is sent to a subtracter 2, the ouput VM of which is sent to a highly sensitive voltmeter 3 as well as comparators 4 and 5 in which a high level VH and a low level VL have been set respectively. The outputs of the comparators 4 and 5 are supplied for a counter 6 as signals for instructing an up count and a down count respectively. A dgital/analog converter 8 supplies a subtracter 9 with the product of the count of the counter 6 and a unit reference voltage. The subtracter 9 subtracts a reference voltage from the output of the digital/analog converter 8, and sends its output to the subtracter 2.
JP9654779A 1979-07-28 1979-07-28 Automatic control circuit for bias of indicator Pending JPS5621043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9654779A JPS5621043A (en) 1979-07-28 1979-07-28 Automatic control circuit for bias of indicator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9654779A JPS5621043A (en) 1979-07-28 1979-07-28 Automatic control circuit for bias of indicator

Publications (1)

Publication Number Publication Date
JPS5621043A true JPS5621043A (en) 1981-02-27

Family

ID=14168111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9654779A Pending JPS5621043A (en) 1979-07-28 1979-07-28 Automatic control circuit for bias of indicator

Country Status (1)

Country Link
JP (1) JPS5621043A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58173459A (en) * 1982-04-06 1983-10-12 Horiba Ltd Ion concentration meter
JPH0534145A (en) * 1991-07-31 1993-02-09 Mitsutoyo Corp Measuring apparatus with automatic offset regulation function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58173459A (en) * 1982-04-06 1983-10-12 Horiba Ltd Ion concentration meter
JPH0534145A (en) * 1991-07-31 1993-02-09 Mitsutoyo Corp Measuring apparatus with automatic offset regulation function

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