GB906158A - Improvements in or relating to circuit arrangements for use in evaluating a signal current - Google Patents
Improvements in or relating to circuit arrangements for use in evaluating a signal currentInfo
- Publication number
- GB906158A GB906158A GB807459A GB807459A GB906158A GB 906158 A GB906158 A GB 906158A GB 807459 A GB807459 A GB 807459A GB 807459 A GB807459 A GB 807459A GB 906158 A GB906158 A GB 906158A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stable circuits
- current
- rectifiers
- march
- comparison
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Dc Digital Transmission (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
906,158. Electric selective signalling systems. SIEMENS & HALSKE A.G. March 9, 1959 [March 10, 1958], No. 8074/59. Class 40 (1). [Also in Group XXXVI] In an arrangement for evaluating signal currents of different values such as the characterization of digits in a telephone system, there is provided at the receiver a plurality of magnetic devices EW1, VW1, AW1; EW2, VW2, AW2; EW3, VW3, AW3, in each of which a comparison is made between a magnetic flux of constant value provided from a source U and a magnetic flux generated by the current to be evaluated in line L, the currents being switched on or off by a transistor switch TR1 to effect the comparison and produce an output pulse in one or more output windings AW1, AW2, AW3 according to the current value. The pulses are applied to trigger bi-stable circuits TK1, TK2, TK3, through transistor amplifiers V1, V2, V3, when a second transistor switch TR2 is rendered conductive, a switch T being provided to reset the bi-stable circuits. Rectifiers EG1-EG3 decouple the different current value stages, and rectifiers AG1-AG3 short circuit pulses not required for evaluation so that the bi-stable circuits respond only to one polarity of current difference.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES57271A DE1055060B (en) | 1958-03-10 | 1958-03-10 | Circuit arrangement for receiving and evaluating different signal currents in the transmission of information, especially in systems of communication technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB906158A true GB906158A (en) | 1962-09-19 |
Family
ID=7491691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB807459A Expired GB906158A (en) | 1958-03-10 | 1959-03-09 | Improvements in or relating to circuit arrangements for use in evaluating a signal current |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE575976A (en) |
| CH (1) | CH366073A (en) |
| DE (1) | DE1055060B (en) |
| FR (1) | FR1229795A (en) |
| GB (1) | GB906158A (en) |
| NL (1) | NL236432A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3665489A (en) * | 1969-06-06 | 1972-05-23 | Ericsson Telefon Ab L M | Telephone instrument for voice frequency choice of number |
-
0
- NL NL236432D patent/NL236432A/xx unknown
-
1958
- 1958-03-10 DE DES57271A patent/DE1055060B/en active Pending
-
1959
- 1959-02-21 BE BE575976A patent/BE575976A/en unknown
- 1959-03-04 CH CH7032259A patent/CH366073A/en unknown
- 1959-03-04 FR FR788355A patent/FR1229795A/en not_active Expired
- 1959-03-09 GB GB807459A patent/GB906158A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3665489A (en) * | 1969-06-06 | 1972-05-23 | Ericsson Telefon Ab L M | Telephone instrument for voice frequency choice of number |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1055060B (en) | 1959-04-16 |
| CH366073A (en) | 1962-12-15 |
| NL236432A (en) | |
| BE575976A (en) | 1959-06-15 |
| FR1229795A (en) | 1960-09-09 |
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