GB686439A - Improvements in and relating to apparatus for encoding electric signals - Google Patents
Improvements in and relating to apparatus for encoding electric signalsInfo
- Publication number
- GB686439A GB686439A GB14038/51A GB1403851A GB686439A GB 686439 A GB686439 A GB 686439A GB 14038/51 A GB14038/51 A GB 14038/51A GB 1403851 A GB1403851 A GB 1403851A GB 686439 A GB686439 A GB 686439A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulses
- pulse
- code
- multivibrators
- produce
- 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
- H03M1/66—Digital/analogue converters
Abstract
686,439. Electric selective signalling. RADIOINDUSTRIE SOC. ANON. June 13, 1951 [June 14, 1950], No. 14038/51. Class' 40 (i) [Also in Group XL(c)] Binary code pulse groups representing numbers from 0 to 2<SP>n</SP>-1 by the presence or absence of n pulses, are generated by the application of a transient signal to a number of registering elements which include trigger circuits having one stable position and a return time equal to one code element interval or a multiple thereof, some of the trigger circuits being connected in cascade through differentiating circuits. As described seven different code groups 1-7, Fig. 1, are provided for, in which the group duration is T and each pulse duration is # = T/3. In one embodiment seven different registering elements are provided and operated by pulses applied to input leads 31-37, Fig. 3, respectively. Pulses applied to leads 31, 33, 37, to produce code groups 1, 3, 7 respectively, trigger multivibrators 41, 43, 47 having return times #, 2# and 3# respectively, determined by delay lines, Fig. 2 (not shown). To produce code groups 2, 4, 6, multivibrators 49, 51, 53 respectively produce pulses of duration #, # and 2# delayed respectively by intervals #, 2# and #. These delays are inserted by further multivibrators 42, 44, 45, to which the initiating pulses from leads 32, 34, 36 respectively are applied and from which delayed triggering voltages are derived by differentiation of their output pulses in circuits 48, 50, 52 to produce sharp positive trailing edge pulses. To produce code group 5 the initiating pulse from lead 35 is applied in parallel to circuit 45, similar to circuit 41, and circuit 55, 56, 57, similar to circuit 44, 50, 51. Their outputs are combined at point 58. The coder may be operated by closing all the input switch contacts 29'-29' to apply the initiating pulse to all the registering elements. simultaneously, the desired output switch contact of the series 38'-38' being closed to select the code output. Alternatively all the output contacts may remain closed and the initiating pulse applied to the appropriate registering element through a selected one of the input contacts. For quantizing and coding a continuously varying signal the input channels of the coder 63, Fig. 4, are fed through amplifiers 62 from the target electrodes 29'-29' of a cathode-ray tube 59. The beam is switched on by recurrent pulses, of interval T, from a generator. 60 and the deflecting electrodes have the varying signal from source 61 applied thereto. Each brightening pulse causes a pulse to be generated on one of the target electrodes and the generation of the appropriate code pulse group at the common output terminal 30. In a modification, all the coding is performed by three multivibrators 65, 66, 67, Fig. 5, connected in cascade through differentiating circuits 68, 69, and each producing pulses of duration #. The initiating pulse'is applied to one of the input terminals 31-37 which are each so connected to the input sides of one, two or three of the multivibrators, that the desired output code group appears at the output terminal 30. In a similar arrangement, Fig. 6 (not shown), all the multivibrators produce pulses for each initiating pulse and the code selection is performed by gating valves connected to their outputs in a similar manner to the connections of terminals 31-37, Fig. 5.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1021851T | 1950-06-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB686439A true GB686439A (en) | 1953-01-21 |
Family
ID=9577246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14038/51A Expired GB686439A (en) | 1950-06-14 | 1951-06-13 | Improvements in and relating to apparatus for encoding electric signals |
Country Status (3)
Country | Link |
---|---|
US (1) | US2667633A (en) |
FR (1) | FR1021851A (en) |
GB (1) | GB686439A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3073904A (en) * | 1959-07-02 | 1963-01-15 | Bell Telephone Labor Inc | Dual encoder for pcm |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2969533A (en) * | 1954-08-26 | 1961-01-24 | Skiatron Elect & Tele | Coding methods and apparatus |
GB833454A (en) * | 1955-06-13 | 1960-04-27 | Kienzle Apparate Gmbh | Process and apparatus for generating series of electrical pulses |
US2982952A (en) * | 1955-06-28 | 1961-05-02 | Zenith Radio Corp | Subscription television |
US2972135A (en) * | 1955-07-14 | 1961-02-14 | Burroughs Corp | Code converting electrical network |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2424481A (en) * | 1944-09-30 | 1947-07-22 | Philco Corp | Electrical system |
BE474884A (en) * | 1945-03-08 | |||
US2409229A (en) * | 1945-06-13 | 1946-10-15 | Jr Carl Harrison Smith | Selector circuit |
US2567846A (en) * | 1945-08-01 | 1951-09-11 | Andrew B Jacobsen | Pulse coding circuit |
US2534369A (en) * | 1947-12-22 | 1950-12-19 | Thomas I Ress | Cathode-ray tube selector system |
US2577141A (en) * | 1948-06-10 | 1951-12-04 | Eckert Mauchly Comp Corp | Data translating apparatus |
-
1950
- 1950-06-14 FR FR1021851D patent/FR1021851A/en not_active Expired
-
1951
- 1951-05-31 US US229049A patent/US2667633A/en not_active Expired - Lifetime
- 1951-06-13 GB GB14038/51A patent/GB686439A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3073904A (en) * | 1959-07-02 | 1963-01-15 | Bell Telephone Labor Inc | Dual encoder for pcm |
Also Published As
Publication number | Publication date |
---|---|
US2667633A (en) | 1954-01-26 |
FR1021851A (en) | 1953-02-25 |
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