GB844016A - Improvements in and relating to two co-ordinate transducer matrixes and associated selection circuits - Google Patents
Improvements in and relating to two co-ordinate transducer matrixes and associated selection circuitsInfo
- Publication number
- GB844016A GB844016A GB26919/58A GB2691958A GB844016A GB 844016 A GB844016 A GB 844016A GB 26919/58 A GB26919/58 A GB 26919/58A GB 2691958 A GB2691958 A GB 2691958A GB 844016 A GB844016 A GB 844016A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transducer
- line
- low
- transistor
- lines
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/04—Arrangements for writing information into, or reading information out from, a digital store with means for avoiding disturbances due to temperature effects
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/74—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of diodes
- H03K17/76—Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors
Landscapes
- Digital Magnetic Recording (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
844,016. Gating circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. Aug. 21, 1958 [Aug. 23, 1957], No. 26919/58. Class 40(6). [Also in Group XIX] A switching circuit for selecting a transducer from a two dimensional matrix array of transducers includes normally cut-off transistors which may be selectively rendered conductive. As shown for a 2 x 2 matrix of transducer heads X 1 Y1 &c., past which a magnetic recording medium (not shown) is moving x-coordinate selection is determined by earthing one of lines 13, 14 normally at +20v which are connected to the bases of transistor pairs 11, 11<SP>1</SP>; 12, 12<SP>1</SP> respectively and y-coordinate selection is determined by earthing one of terminals 17, 18 normally at +20v which are connected to the bases of transistors 15, 16. Thus to select the transducer X 1 Y 2 , line 13 and terminal 18 are earthed. On a read operation, signals induced in the transducer x 1 y 2 pass through diodes 19, 20 and transducers 11, 11<SP>1</SP> to output lines 32, 31. On a write operation lines 39, 40 are high and low or low and high respectively, to control transistors 33, 34 which in turn control current flow through the lines 31, 32. Thus when line 40 is high and line 39 is low a circuit is completed from earth, transistor 34, line 32, transistor 11, line 21, diode 19, the upper portion of transducer X 1 Y 2 , transistor 16 to + 15v, causing current flow in one direction through the winding of transducer x 1 y 2 . When the line 40 is low and line 39 high, the opposite flow is induced in the transducer x 1 y 2 .
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US844016XA | 1957-08-23 | 1957-08-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB844016A true GB844016A (en) | 1960-08-10 |
Family
ID=22184738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26919/58A Expired GB844016A (en) | 1957-08-23 | 1958-08-21 | Improvements in and relating to two co-ordinate transducer matrixes and associated selection circuits |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1078358B (en) |
FR (1) | FR1201769A (en) |
GB (1) | GB844016A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1193994B (en) * | 1960-12-07 | 1965-06-03 | Elektronische Rechenmasch Ind | Electronic selection device |
-
1958
- 1958-08-06 DE DEI15191A patent/DE1078358B/en active Pending
- 1958-08-20 FR FR1201769D patent/FR1201769A/en not_active Expired
- 1958-08-21 GB GB26919/58A patent/GB844016A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1201769A (en) | 1960-01-06 |
DE1078358B (en) | 1960-03-24 |
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