JPS6438664A - Holding circuit - Google Patents
Holding circuitInfo
- Publication number
- JPS6438664A JPS6438664A JP62194165A JP19416587A JPS6438664A JP S6438664 A JPS6438664 A JP S6438664A JP 62194165 A JP62194165 A JP 62194165A JP 19416587 A JP19416587 A JP 19416587A JP S6438664 A JPS6438664 A JP S6438664A
- Authority
- JP
- Japan
- Prior art keywords
- switch
- voltage
- turned
- circuit
- output
- 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
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE:To obtain a holding circuit capable of converging the output of a buffer circuit to predetermined voltage an infinite time after holding is started, by providing the switch, resistor and power source connected to a holding capacitor (C) in series and controlling said switch during a holding state by the pulse signal of a pulse generating circuit. CONSTITUTION:When a switch 2 is turned ON by the signal from a control terminal 3 and a switch 6 is turned OFF by a pulse generating circuit 9, the voltage of an input terminal 1 is outputted to the output of a buffer circuit 5. Next, when the switch 2 is turned OFF by the signal from the terminal 2 and the switch 6 is turned ON and OFF by the pulse signal from the circuit 9, the voltage immediately before the switch 2 is turned OFF preserved in C4 is outputted to the output of the circuit 5 immediately after the switch 2 is turned OFF. The current calculated by dividing the difference voltage of the voltage of a power supply 8 and the voltage held to C4 by the resistance value of a resistor 7 is charged in and discharged from C4 only during a time when the switch 6 is turned ON and, after the definite time determined by the pulse width of the circuit 9 and the resistance value of the resistor 7, the voltage between both terminals thereof becomes the same voltage as the power source 8 and the output of the circuit 5 becomes the same voltage as the power supply 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62194165A JPS6438664A (en) | 1987-08-03 | 1987-08-03 | Holding circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62194165A JPS6438664A (en) | 1987-08-03 | 1987-08-03 | Holding circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6438664A true JPS6438664A (en) | 1989-02-08 |
Family
ID=16320010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62194165A Pending JPS6438664A (en) | 1987-08-03 | 1987-08-03 | Holding circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6438664A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0411399A (en) * | 1990-04-27 | 1992-01-16 | Nec Corp | Sample-and-hold amplifier circuit |
-
1987
- 1987-08-03 JP JP62194165A patent/JPS6438664A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0411399A (en) * | 1990-04-27 | 1992-01-16 | Nec Corp | Sample-and-hold amplifier circuit |
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