JPS6449317A - Analog switch driving circuit - Google Patents
Analog switch driving circuitInfo
- Publication number
- JPS6449317A JPS6449317A JP62205027A JP20502787A JPS6449317A JP S6449317 A JPS6449317 A JP S6449317A JP 62205027 A JP62205027 A JP 62205027A JP 20502787 A JP20502787 A JP 20502787A JP S6449317 A JPS6449317 A JP S6449317A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- base
- time
- transistor
- analog 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.)
- Pending
Links
Landscapes
- Electronic Switches (AREA)
Abstract
PURPOSE:To exactly compensate a DC offset at the time of a sample mode, by preventing a drift caused by the fluctuation of a temperature and a power source, etc., with respect to a base current at the time of ON of a bipolar transistor for constituting an analog switch for sample-hold, and fixing an emitter-base voltage at the time of OFF, to a prescribed voltage or below. CONSTITUTION:A constant-voltage power source part 11 is constituted of a constant-current source I1, transistors Q1-Q4, and resistances R3, R4. A switching means 12 constituted of a differential pair of transistors Q7, Q8 is brought to an ON/OFF control, based on a sample-hold pulse being a switch input. Also, a voltage limiter 13 for fixing a base voltage VB to a prescribed voltage or below at the time of OFF of a transistor Q is constituted of transistors Q5, Q6 and its base power source V1. In such a way, at the time of a sample mode, a base current IB at the time of ON of the transistor Q being an analog switch becomes a constant current without being influenced by a temperature characteristic and a voltage characteristic of a base-emitter voltage VBE. Also, a base voltage VB also becomes prescribed voltage determined by the base-emitter voltage VBE of the transistor Q.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62205027A JPS6449317A (en) | 1987-08-20 | 1987-08-20 | Analog switch driving circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62205027A JPS6449317A (en) | 1987-08-20 | 1987-08-20 | Analog switch driving circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6449317A true JPS6449317A (en) | 1989-02-23 |
Family
ID=16500230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62205027A Pending JPS6449317A (en) | 1987-08-20 | 1987-08-20 | Analog switch driving circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6449317A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2887710A1 (en) * | 2005-06-28 | 2006-12-29 | Atmel Grenoble Soc Par Actions | DIFFERENTIAL PAUSE POWER SWITCH OF TRANSISTORS POWERED BY LOW VCC VOLTAGE |
-
1987
- 1987-08-20 JP JP62205027A patent/JPS6449317A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2887710A1 (en) * | 2005-06-28 | 2006-12-29 | Atmel Grenoble Soc Par Actions | DIFFERENTIAL PAUSE POWER SWITCH OF TRANSISTORS POWERED BY LOW VCC VOLTAGE |
WO2007000387A1 (en) * | 2005-06-28 | 2007-01-04 | E2V Semiconductors | Current switch with differential transistor pairs fed by a low voltage |
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