JPS5456480A - Automatic range changeover system - Google Patents
Automatic range changeover systemInfo
- Publication number
- JPS5456480A JPS5456480A JP12330377A JP12330377A JPS5456480A JP S5456480 A JPS5456480 A JP S5456480A JP 12330377 A JP12330377 A JP 12330377A JP 12330377 A JP12330377 A JP 12330377A JP S5456480 A JPS5456480 A JP S5456480A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- judgement
- attenuator
- automatic range
- limit value
- 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.)
- Granted
Links
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
PURPOSE: To achieve higher speed of automatic range changeover by performing analog judgement then digital judgement through the utilization of the time when an A/D conversion circuit does not contribute to sampling of input.
CONSTITUTION: The output of an attenuator 1 passes through a full-wave rectifier 10 and is judged by an upper limit value detection circuit 11 and a lower limit value detection circuit 12. Depending upon the results of the judgement, a reversible counter circuit 7 is counted up or down, by which the attenuator 1 is changed over via control circuit 8. At this time, counting of the circuit 7 is inhibited by AND circuits 15, 16 during measurement voltage sampling period. In this way, the range close to an optimum one is beforehand set. Next, the output of the attenuator 1 performs digital judgement through an A/D converter 2, result judgement circuit 3 and the attenuator 1 is changed over by the circuit 7, 8. In this way, automatic range change over may be made higher in speed
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52123303A JPS5845662B2 (en) | 1977-10-13 | 1977-10-13 | Automatic range switching method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52123303A JPS5845662B2 (en) | 1977-10-13 | 1977-10-13 | Automatic range switching method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5456480A true JPS5456480A (en) | 1979-05-07 |
JPS5845662B2 JPS5845662B2 (en) | 1983-10-12 |
Family
ID=14857192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52123303A Expired JPS5845662B2 (en) | 1977-10-13 | 1977-10-13 | Automatic range switching method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5845662B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5779458A (en) * | 1980-11-04 | 1982-05-18 | Advantest Corp | Measuring device for alternating-current voltage |
-
1977
- 1977-10-13 JP JP52123303A patent/JPS5845662B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5779458A (en) * | 1980-11-04 | 1982-05-18 | Advantest Corp | Measuring device for alternating-current voltage |
Also Published As
Publication number | Publication date |
---|---|
JPS5845662B2 (en) | 1983-10-12 |
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