JPS56119531A - Level converting circuit - Google Patents
Level converting circuitInfo
- Publication number
- JPS56119531A JPS56119531A JP2306080A JP2306080A JPS56119531A JP S56119531 A JPS56119531 A JP S56119531A JP 2306080 A JP2306080 A JP 2306080A JP 2306080 A JP2306080 A JP 2306080A JP S56119531 A JPS56119531 A JP S56119531A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- output
- circuit
- short
- current
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/018—Coupling arrangements; Interface arrangements using bipolar transistors only
- H03K19/01806—Interface arrangements
- H03K19/01812—Interface arrangements with at least one differential stage
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/003—Modifications for increasing the reliability for protection
- H03K19/00307—Modifications for increasing the reliability for protection in bipolar transistor circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Logic Circuits (AREA)
- Electronic Switches (AREA)
Abstract
PURPOSE:To prevent the element destruction due to the short-circuit accident of the output stage with a simple circuit constitution, by driving the transistor of the output short-circuit protecting circuit directly by the output of the current switch. CONSTITUTION:When input VIN of the current mode logic CML mode becomes H, transistor T1 is turned on, and output VOUT of transistor logic TTL becomes H. Therefore, voltage VX of the voltage division ratio of bias circuit 4 is applied to the base of transistor T4. Meanwhile, when output terminal 2 is short-circuited to earth potential GND, the controller current of transistor T4 is supplied through the path of power source +VCC-resistance R1-transistor T4, and the base current of transistor T3 is reduced rapidly and cannot hold the turn-on state. As a result, transistor T3 is prevented from being destructed thermally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2306080A JPS56119531A (en) | 1980-02-26 | 1980-02-26 | Level converting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2306080A JPS56119531A (en) | 1980-02-26 | 1980-02-26 | Level converting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56119531A true JPS56119531A (en) | 1981-09-19 |
| JPH0359609B2 JPH0359609B2 (en) | 1991-09-11 |
Family
ID=12099878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2306080A Granted JPS56119531A (en) | 1980-02-26 | 1980-02-26 | Level converting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56119531A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59131227A (en) * | 1982-12-27 | 1984-07-28 | Sony Tektronix Corp | Logical signal converting circuit |
| JPH03248619A (en) * | 1990-02-27 | 1991-11-06 | Nec Corp | Semiconductor output circuit |
| JPH04282915A (en) * | 1991-03-12 | 1992-10-08 | Nec Corp | Level conversion circuit |
-
1980
- 1980-02-26 JP JP2306080A patent/JPS56119531A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59131227A (en) * | 1982-12-27 | 1984-07-28 | Sony Tektronix Corp | Logical signal converting circuit |
| JPH0356023B2 (en) * | 1982-12-27 | 1991-08-27 | ||
| JPH03248619A (en) * | 1990-02-27 | 1991-11-06 | Nec Corp | Semiconductor output circuit |
| JPH04282915A (en) * | 1991-03-12 | 1992-10-08 | Nec Corp | Level conversion circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0359609B2 (en) | 1991-09-11 |
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