JPS5621043A - Automatic control circuit for bias of indicator - Google Patents
Automatic control circuit for bias of indicatorInfo
- 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
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.
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)
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 |
-
1979
- 1979-07-28 JP JP9654779A patent/JPS5621043A/en active Pending
Cited By (2)
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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