GB639928A - Improvements in electrical calculating circuits - Google Patents
Improvements in electrical calculating circuitsInfo
- Publication number
- GB639928A GB639928A GB2491746A GB2491746A GB639928A GB 639928 A GB639928 A GB 639928A GB 2491746 A GB2491746 A GB 2491746A GB 2491746 A GB2491746 A GB 2491746A GB 639928 A GB639928 A GB 639928A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- grid
- output current
- compensating
- compensating valve
- 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
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
- G06G7/16—Arrangements for performing computing operations, e.g. operational amplifiers for multiplication or division
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Software Systems (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Abstract
639,928. Valve multiplying circuits. SCOLES, G. J., MILLER, C. W., and METROPOLITANVICKERS ELECTRICAL CO., Ltd. Aug. 21, 1946, No. 24917. [Class 40 (vi)] In a circuit for multiplying together two electrical quantities x and y, the first quantity x is applied in push-pull between a grid of a main valve V1 and a grid of a compensating valve V2 and the second quantity y is applied in push-pull between another grid of the main valve and either a grid of a further compensating valve V3 or another grid of the first compensating valve (Fig. 2, not shown). The anode circuits of the valves are connected in parallel. Thus the output current from the main valve is k1(a+x)(b+y)=k1(ab+ay+bx+by), (where a and b account for the initial bias on the grids), and the output currents from the compensating valves are k2(a-x) and k3(b - y). If k2=k1b and k3=k1a, then the combined output current is k1xy together with some constant terms, the other terms containing x and y having been eliminated, In the arrangement using only one compensating valve the output current from the compensating valve is k1(a - x)(b - y)= k1(ab - ay - bx+xy) and the combined output current 2k1xy+2k1ab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2491746A GB639928A (en) | 1946-08-21 | 1946-08-21 | Improvements in electrical calculating circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2491746A GB639928A (en) | 1946-08-21 | 1946-08-21 | Improvements in electrical calculating circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB639928A true GB639928A (en) | 1950-07-12 |
Family
ID=10219298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2491746A Expired GB639928A (en) | 1946-08-21 | 1946-08-21 | Improvements in electrical calculating circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB639928A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3614407A (en) * | 1961-04-06 | 1971-10-19 | Snecma | Method of multiplication of electric signals and its application to radar or like systems |
-
1946
- 1946-08-21 GB GB2491746A patent/GB639928A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3614407A (en) * | 1961-04-06 | 1971-10-19 | Snecma | Method of multiplication of electric signals and its application to radar or like systems |
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