GB932889A - Improvements in or relating to electrical coding apparatus - Google Patents
Improvements in or relating to electrical coding apparatusInfo
- Publication number
- GB932889A GB932889A GB6514/61A GB651461A GB932889A GB 932889 A GB932889 A GB 932889A GB 6514/61 A GB6514/61 A GB 6514/61A GB 651461 A GB651461 A GB 651461A GB 932889 A GB932889 A GB 932889A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- amplitude
- frequency
- duration
- feb
- 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
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
- H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Plasma Technology (AREA)
Abstract
932,889. Electric selective signalling systems. GENERAL ELECTRIC CO. Ltd. Feb. 8, 1962 [Feb. 22, 1961], No. 6514/61. Class 40 (1). [Also in Group XIX] In a multiplying circuit in which two input numbers are represented by the amplitudes of two D.C. signals 1, 2, Fig. 1, the first signal is converted into a pulse train 11 having a frequency proportional to the first number and the second signal is converted into a signal 13 having a duration proportional to the second number, and this duration significant signal is then arranged to gate 12 the frequency significant signal whereby pulses are produced which represent, by their number, the product of the first and second input numbers. The first conversion, from amplitude to frequency, is effected by a variable frequency oscillator (Fig. 2, not shown), using transistors and a saturable reactor, and the second conversion, from amplitude to duration, is effected by comparing 4 the amplitude with a linearly increasing reference signal and by turning off a trigger 6 when equality is attained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6514/61A GB932889A (en) | 1961-02-22 | 1961-02-22 | Improvements in or relating to electrical coding apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6514/61A GB932889A (en) | 1961-02-22 | 1961-02-22 | Improvements in or relating to electrical coding apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB932889A true GB932889A (en) | 1963-07-31 |
Family
ID=9815900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6514/61A Expired GB932889A (en) | 1961-02-22 | 1961-02-22 | Improvements in or relating to electrical coding apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB932889A (en) |
-
1961
- 1961-02-22 GB GB6514/61A patent/GB932889A/en not_active Expired
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