JPS54159246A - Resistance value output circuit - Google Patents
Resistance value output circuitInfo
- Publication number
- JPS54159246A JPS54159246A JP6769978A JP6769978A JPS54159246A JP S54159246 A JPS54159246 A JP S54159246A JP 6769978 A JP6769978 A JP 6769978A JP 6769978 A JP6769978 A JP 6769978A JP S54159246 A JPS54159246 A JP S54159246A
- Authority
- JP
- Japan
- Prior art keywords
- output
- resistance value
- impedance element
- operational amplifier
- semiconductor switch
- 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
Abstract
PURPOSE: To achieve the improvement in the accuracy of the resistance value output circuit by converting the output of an operational amplifier once to time width signal then fetching the output through an insulation type buffer thereby making ON-OFF controlling of a semiconductor switch.
CONSTITUTION: When input voltage Ei is applied to an operational amplifier 20 through an impedance element 450, the operational amplifier 20 converts the output voltage to a pulse signal in a V/T conversion circuit 30 so that the potential at its input addition point becomes 0 and a semiconductor switch 10 is switched by this, then the resistance value of an impedance element 450 becomes value corresponding to the input voltage. On the other hand, the controlled pulse signal of the V/T conversion circuit 30 is also applied to an impedance element 451 to switch a semiconductor switch 40 in the similar manner as with the impedance element 450 and therefore the output resistance value proportional to the input voltage Ei is obtainable at output terminals 1, 2.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6769978A JPS54159246A (en) | 1978-06-07 | 1978-06-07 | Resistance value output circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6769978A JPS54159246A (en) | 1978-06-07 | 1978-06-07 | Resistance value output circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54159246A true JPS54159246A (en) | 1979-12-15 |
JPS6122886B2 JPS6122886B2 (en) | 1986-06-03 |
Family
ID=13352454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6769978A Granted JPS54159246A (en) | 1978-06-07 | 1978-06-07 | Resistance value output circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54159246A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT388020B (en) * | 1986-08-01 | 1989-04-25 | Interprofil Gfk Gmbh | WING OR FLOOR FRAME AND METHOD FOR PRODUCING SAME |
-
1978
- 1978-06-07 JP JP6769978A patent/JPS54159246A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6122886B2 (en) | 1986-06-03 |
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