NO783747L - RECEPTION ENTRY CIRCUIT. - Google Patents
RECEPTION ENTRY CIRCUIT.Info
- Publication number
- NO783747L NO783747L NO783747A NO783747A NO783747L NO 783747 L NO783747 L NO 783747L NO 783747 A NO783747 A NO 783747A NO 783747 A NO783747 A NO 783747A NO 783747 L NO783747 L NO 783747L
- Authority
- NO
- Norway
- Prior art keywords
- winding
- input circuit
- parts
- transformer
- receiver
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims description 35
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000004907 flux Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
- H04M15/28—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephone Set Structure (AREA)
- Burglar Alarm Systems (AREA)
- Pens And Brushes (AREA)
- Coils Or Transformers For Communication (AREA)
Description
Oppfinnelsen^Inngangskrets for mottager",The Invention^Receiver Input Circuit",
benevnelse:designation:
Oppfinnelsen angår en inngangskrets for en mottager av signaler i telefonanlegg med trekk som anført i hovedkravets innledning. The invention relates to an input circuit for a receiver of signals in telephone systems with features as stated in the introduction of the main claim.
I kjente koblinger av mottagere for taksameterpulser som an-kommer fra telefonsentralen,såvel som for andre signaler i tilførsels-ledningen til en telefon, blir der fer bære, frekvenser på 12 kHz ,36 kHz , m.v. benyttet inngangskretser som oppviser induktiviteter og kapasitet-er og tjener dels som båndpassfiltre og dels som tilpasningsledd mel-lom ceninnkommende ledning og signalmottageren. Disse inngangskretser består av en spenningsførende transformator for signalspenningen, hvor der i serie med primærviklingen er koblet en tilleggsvikling som er anordnet på en egen kjerne, og som i serie med en kondensator er tilsluttet en klemme for telefonledningen. Primærviklingens og tilleggs-viklingens induktiviteter gir en samlet induktivitet som ved en gitt kildemotstand er stor nok til å gi en nødvendig verdi av primærviklingens godhetsfaktor. Transformatorens sekundærvikling danner sammen med en parallelkoblet kondensator en parallellresonansekrets. In known connections of receivers for taximeter pulses arriving from the telephone exchange, as well as for other signals in the supply line to a telephone, frequencies of 12 kHz, 36 kHz, etc. are carried. used input circuits that exhibit inductances and capacities and serve partly as bandpass filters and partly as adaptation links between the incoming line and the signal receiver. These input circuits consist of a voltage-carrying transformer for the signal voltage, where an additional winding is connected in series with the primary winding, which is arranged on a separate core, and which is connected in series with a capacitor to a terminal for the telephone line. The inductances of the primary winding and the additional winding give a total inductance which, at a given source resistance, is large enough to give a necessary value of the goodness factor of the primary winding. The transformer's secondary winding together with a parallel-connected capacitor forms a parallel resonant circuit.
En ulempe ved slike inngangskretser ligger i anvendelsen avA disadvantage of such input circuits lies in the use of
to særskilte kjerner, som krever stor plass og må fremstilles av høy-verdige materialer. two separate cores, which require a lot of space and must be made of high-quality materials.
Til grunn for oppfinnelsen ligger den op<p>gave å skaffe en plass- og materialsparende inngangskrets av den angitte art. The invention is based on the task of providing a space- and material-saving input circuit of the specified type.
Denne oppgave løses ved hjelp av de karakteriserende trekk i-følge hovedkravet. This task is solved using the characterizing features according to the main requirement.
Et utførelseseksempel på oppfinnelsen vil bli beskrevet i det følgende under henvisning til tegningen,som viser en inngangskrets for en mottager for taksameterpulser i telefonanlegg med automatisk avgiftsavregning. An embodiment of the invention will be described in the following with reference to the drawing, which shows an input circuit for a receiver for taximeter pulses in telephone systems with automatic toll settlement.
Den viste inngangskrets omfatter en transformator 2 som er forsynt méd en eneste, trebenet kjerne 1, og hvis primærvikling 3 som via en seriekoblet kondensator C, er tilkoblet klemmer A, B, består av to viklingsdeler 4 og 5, anordnet i samme viklerretning på hvert sitt ytre ben 6 resp. 7 på hver sin side av et midtre ben 8 hos trans formatoren. Transformatorens sekundærvikling 9 er anordnet på midtbenet 8 og sammen med en parallellkoblet kondensator tilkoblet mottageren for taksameterpulsene. The input circuit shown comprises a transformer 2 which is provided with a single, three-legged core 1, and whose primary winding 3, which is connected to terminals A, B via a series-connected capacitor C, consists of two winding parts 4 and 5, arranged in the same winding direction on each its outer leg 6 or 7 on each side of a middle leg 8 of the transformer. The transformer's secondary winding 9 is arranged on the middle leg 8 and, together with a parallel-connected capacitor, the receiver for the taximeter pulses is connected.
Blir et signal påtrykt klemmene A, B,blir der i de to viklingsdeler 4 og 5 på ytterbenene 6 og 7 indusert magnetiske flukser If a signal is applied to terminals A, B, magnetic fluxes are induced in the two winding parts 4 and 5 on the outer legs 6 and 7
som har samme retning, og som i midtbenet 8 forløper i motsatteretninger som vist ved piler på tegningen. Hvis de to yiklingsdeler 4 og 5 av primærviklingen 3 hadde samme vindingstall, ville de like store, men motsatt rettede magnetiske flukser i midtbenet 8 oppheve hver-andre. Skal der imidlertid oppstå et signal i sekundærviklingen 9, er det nok bare å forandre antallet av vindinger i en av viklingsdelene 4, 5, hvorved også disse viklingsdelers koblingsfaktor med sekundærviklingen 9 blir endret. which have the same direction, and which in the middle leg 8 run in opposite directions as shown by arrows in the drawing. If the two winding parts 4 and 5 of the primary winding 3 had the same number of turns, the equally large but oppositely directed magnetic fluxes in the middle leg 8 would cancel each other out. However, should a signal occur in the secondary winding 9, it is enough to change the number of turns in one of the winding parts 4, 5, whereby the coupling factor of these winding parts with the secondary winding 9 is also changed.
Virkemåten av den beskrevne inngangskrets forblir den samme om man bytter om de to viklinger 3 og 9, slik at sekundærviklingen The operation of the described input circuit remains the same if the two windings 3 and 9 are interchanged, so that the secondary winding
blir dannet av to viklingsdeler 4 og 5, som er forsynt med en parallellkoblet kondensator C^. og tilsluttet mottagningskretsen for taksameterpulsene, mens primærviklingen dannes av den udelte primærvikling som sitter på midtbenet 8 og er forsynt med kondensatoren og tilsluttet klemmene A, B. is formed by two winding parts 4 and 5, which are provided with a parallel-connected capacitor C^. and connected to the receiving circuit for the taximeter pulses, while the primary winding is formed by the undivided primary winding which sits on the middle leg 8 and is equipped with the capacitor and connected to terminals A, B.
Inngangskretsen ifølge oppfinnelsen kan også anvendes for andre signaler, f.eks. identifikasjonssignaler som innmates på telefonledningen og tjener til å fastslå det anropende taleapparat i hustelefonsentraler o.l. The input circuit according to the invention can also be used for other signals, e.g. identification signals that are fed into the telephone line and serve to identify the calling speaker in house telephone exchanges etc.
Trebenskjernen 1 hos transformatoren 2 er fortrinnsvis ut-formet som skallkjerne, tar liten plass og representerer bare en liten produksjonsteknisk påkostning. The three-leg core 1 of the transformer 2 is preferably designed as a shell core, takes up little space and represents only a small production technical expense.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1376677A CH622655A5 (en) | 1977-11-11 | 1977-11-11 | Input circuit for a signal receiver in telephone systems |
Publications (1)
Publication Number | Publication Date |
---|---|
NO783747L true NO783747L (en) | 1979-05-14 |
Family
ID=4395116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO783747A NO783747L (en) | 1977-11-11 | 1978-11-08 | RECEPTION ENTRY CIRCUIT. |
Country Status (6)
Country | Link |
---|---|
CH (1) | CH622655A5 (en) |
DE (1) | DE2810133C2 (en) |
ES (1) | ES474971A1 (en) |
FR (1) | FR2408947A1 (en) |
IT (1) | IT1101021B (en) |
NO (1) | NO783747L (en) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1294487B (en) * | 1967-08-12 | 1969-05-08 | Telefonbau & Normalzeit Gmbh | Circuit arrangement for a transistor amplifier for telephone stations with charge counter |
-
1977
- 1977-11-11 CH CH1376677A patent/CH622655A5/en not_active IP Right Cessation
-
1978
- 1978-03-09 DE DE2810133A patent/DE2810133C2/en not_active Expired
- 1978-11-08 IT IT29553/78A patent/IT1101021B/en active
- 1978-11-08 NO NO783747A patent/NO783747L/en unknown
- 1978-11-09 FR FR7831678A patent/FR2408947A1/en active Granted
- 1978-11-10 ES ES474971A patent/ES474971A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2408947A1 (en) | 1979-06-08 |
DE2810133C2 (en) | 1979-10-04 |
FR2408947B1 (en) | 1982-05-21 |
CH622655A5 (en) | 1981-04-15 |
ES474971A1 (en) | 1979-03-16 |
IT7829553A0 (en) | 1978-11-08 |
DE2810133B1 (en) | 1978-12-21 |
IT1101021B (en) | 1985-09-28 |
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