JPS54148465A - Driving circuit - Google Patents
Driving circuitInfo
- Publication number
- JPS54148465A JPS54148465A JP5735578A JP5735578A JPS54148465A JP S54148465 A JPS54148465 A JP S54148465A JP 5735578 A JP5735578 A JP 5735578A JP 5735578 A JP5735578 A JP 5735578A JP S54148465 A JPS54148465 A JP S54148465A
- Authority
- JP
- Japan
- Prior art keywords
- current
- secure
- voltage
- reference voltage
- diode
- 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 always secure an accurate generation of the voltage featuring the equal positive and negative amplitude by keeping a constant current value at all times regardless of the direction of the current flowing to the clamping diode.
CONSTITUTION: Transistors Tr1, Tr2 and Tr3 form a constant current source, and each current i1, i2 and i3 are prescribed by reference voltage Vref1. At the same time, the emitter area is set properly to secure the constitution of i1 = i2 = ki3. Then the current mirror circuit is formed with Tr7 and Tr6 which are connected to the diodes, and the emitter area is set properly to secure the relation of i3 = i4 between current i3 of Tr7 and current i4 of Tr6. If each emitter area is selected to obtain the relation of kl=1/2, i1 = i2 = i4/2 is always satisfied. And the current flowing from reference voltage Vref2 to diode D3 and D4 is always equal owing to the current switch formed with Tr4 and Tr5. Thus, Vout which is obtained in the form of the forward voltage drop of diode D3 and D4 can generate accurately the voltage of equal positive and negative amplitude at all times against the reference voltage.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5735578A JPS54148465A (en) | 1978-05-15 | 1978-05-15 | Driving circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5735578A JPS54148465A (en) | 1978-05-15 | 1978-05-15 | Driving circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54148465A true JPS54148465A (en) | 1979-11-20 |
JPS6232847B2 JPS6232847B2 (en) | 1987-07-17 |
Family
ID=13053259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5735578A Granted JPS54148465A (en) | 1978-05-15 | 1978-05-15 | Driving circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54148465A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0199287A2 (en) * | 1985-04-19 | 1986-10-29 | Digital Equipment Corporation | Source follower current mode logic cells |
-
1978
- 1978-05-15 JP JP5735578A patent/JPS54148465A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0199287A2 (en) * | 1985-04-19 | 1986-10-29 | Digital Equipment Corporation | Source follower current mode logic cells |
EP0199287B1 (en) * | 1985-04-19 | 1991-08-14 | Digital Equipment Corporation | Source follower current mode logic cells |
Also Published As
Publication number | Publication date |
---|---|
JPS6232847B2 (en) | 1987-07-17 |
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