GB1020968A - A logical circuit - Google Patents
A logical circuitInfo
- Publication number
- GB1020968A GB1020968A GB4253264A GB4253264A GB1020968A GB 1020968 A GB1020968 A GB 1020968A GB 4253264 A GB4253264 A GB 4253264A GB 4253264 A GB4253264 A GB 4253264A GB 1020968 A GB1020968 A GB 1020968A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- diode
- circuit
- transistors
- saturating
- 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.)
- Expired
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
- H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
- H03K19/08—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices
- H03K19/082—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using bipolar transistors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Logic Circuits (AREA)
Abstract
1,020,968. Transistor logic circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. Oct. 19, 1964, No. 42532/64. Heading H3T. A logic circuit comprises a bridge circuit comprising, between the input terminals 5, 6, two diode arms 12 and 13 in series and two emitter-base diode arms 14 and 15 in series, a resistor 11 being connected across the other diagonal 9, 10. In the circuit shown, when the signals at 5 and 6 are equal no current flows in the transistors 14 and 15 so that transistor 19 is conducting. When 5 is positive with respect to 6, current flows in the path 12, 11, 15 so that transistor 15 conducts and 19 is cut off. Similarly, transistor 19 conducts when 6 is positive with respect to 5. Accordingly, the circuit performs an " exclusive OR " function. Diode 23 prevents transistors 14 and 15 saturating and diode 24 prevents 19 saturating. In addition, the charge stored in diodes 12 and 13, when conducting, provide a discharge path for charge stored by the transistors 15 and 16, respectively when the signal terminates. Fig. 1 (not shown) is a simplified circuit having the diodes and emitter-base paths reversed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4253264A GB1020968A (en) | 1964-10-19 | 1964-10-19 | A logical circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4253264A GB1020968A (en) | 1964-10-19 | 1964-10-19 | A logical circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1020968A true GB1020968A (en) | 1966-02-23 |
Family
ID=10424836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4253264A Expired GB1020968A (en) | 1964-10-19 | 1964-10-19 | A logical circuit |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1020968A (en) |
-
1964
- 1964-10-19 GB GB4253264A patent/GB1020968A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2622212A (en) | Bistable circuit | |
| GB1107313A (en) | Electronic switching circuit | |
| GB1109820A (en) | Multiple level logic circuitry | |
| GB1285990A (en) | Binary frequency divider | |
| GB1239599A (en) | ||
| GB945379A (en) | Binary trigger | |
| GB813860A (en) | Improvements in or relating to transistor circuits | |
| GB1238589A (en) | ||
| GB884275A (en) | Transistor bistable circuit | |
| GB1206657A (en) | Input and output emitter-follower current mode logic circuitry | |
| GB1020968A (en) | A logical circuit | |
| GB1051658A (en) | ||
| GB995097A (en) | Switching circuits including negative resistance elements | |
| US3103596A (en) | skerritt | |
| US3471713A (en) | High-speed logic module having parallel inputs,direct emitter feed to a coupling stage and a grounded base output | |
| GB1002575A (en) | Logical circuits | |
| GB1028650A (en) | Improvements relating to threshold logic circuits | |
| GB1072546A (en) | Improvements relating to threshold logic circuits | |
| GB1172369A (en) | Improvements in and relating to Data Storage Apparatus | |
| GB973344A (en) | Improvements in semiconductor logic circuits | |
| GB1116957A (en) | Logic circuit | |
| GB935221A (en) | Improvements in logical circuits | |
| GB1093408A (en) | Improvements in or relating to logical circuits | |
| GB1427747A (en) | Multiple input logic circuit | |
| GB773963A (en) | Logical circuits employing junction transistors |