DE2159095A1 - AMPLIFIER FOR CARRIER FREQUENCY SYSTEMS FOR DECOUPLING SEVERAL INPUT AND OUTPUT BRANCHES - Google Patents
AMPLIFIER FOR CARRIER FREQUENCY SYSTEMS FOR DECOUPLING SEVERAL INPUT AND OUTPUT BRANCHESInfo
- Publication number
- DE2159095A1 DE2159095A1 DE19712159095 DE2159095A DE2159095A1 DE 2159095 A1 DE2159095 A1 DE 2159095A1 DE 19712159095 DE19712159095 DE 19712159095 DE 2159095 A DE2159095 A DE 2159095A DE 2159095 A1 DE2159095 A1 DE 2159095A1
- Authority
- DE
- Germany
- Prior art keywords
- transistor
- amplifier
- emitter
- base
- transistors
- 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.)
- Granted
Links
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/08—Arrangements for combining channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/08—Arrangements for combining channels
- H04J1/085—Terminal station; Combined modulator and demodulator circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Description
Verstärker für Trägerfrequenz-Systeme zur Entkopplung von mehreren Ein- und Ausgangszweigen In Trägerfrequenz-Systemen sind häufig Paralleischaltungen von Filter- bzw. Modulator-Aus- und -;Eingängen gegeben.Amplifier for carrier frequency systems for decoupling several Input and output branches In carrier frequency systems there are often parallel connections of filter or modulator outputs and inputs.
Um eine gegenseitige Beeinflussung dieser parallelen Zweige zu unterbinden, ist die Zwischenschaltung von Gabeln erforderlich. Gabelschaltungen sind jedoch sehr aufwendig und teuer. Darüber hinaus weisen sie erhebliche Dämpfungen auf, insbesondere dann, wenn mehr als zwei parallele Zweige gegeben sind.To prevent these parallel branches from influencing each other, the interposition of forks is required. Hybrid circuits are however very complex and expensive. In addition, they have considerable attenuation, in particular if there are more than two parallel branches.
Die Aufgabenstellung vorliegender Erfindung besteht in der Schaffung einer möglichst einfachen, dämpfungsarmen Schaltungsanordnung für einen regelbaren Verstärker geringen Stromverbrauchs, bei dem aufwendige Gabeln vermieden werden.The object of the present invention is to create the simplest possible, low-attenuation circuit arrangement for a controllable Low power consumption amplifier that avoids expensive forks.
Diese Aufgabenstellung wird dadurch gelöst, daß der zwischen den Eingangs- und Ausgangsklemmen angeordnete vierstufige Verstärker, der mit Transistoren bestückt ist, in der Weise aufgebaut ist, daß die Eingangsklemme des Verstärkers mit dem Emitter des ersten Transistors und durch Gleichstromkopplung mit dem Kollektor des zweiten Transistors verbunden ist, daß die Basis des ersten Transistors auf Massepotential liegt und dessen Kollektor mit der Basis des zweiten Transistors und über einen Widerstand mit dem wechselstrommäßigen Massepol verbunden ist und daß der Emitter des zweiten Transistors mit der Basis des dritten Transistors verbunden ist und der Emitter des dritten Transistors sowie der Kollektor des vierten Transistors - beide Transistoren sind durch Gleichstromkopplung miteinander gekoppelt - die Ausgangsklemme des Verstärkers bilden, daß der Kollektor des dritten Transistors mit der Basis des vierten Transistors verbunden ist, wobei die beiden Anschlußpunkte über einen dritten Widerstand sowie der Emitter des vierten Transistors wechselstrommäßig auf Massepotential liegen und zum Einstellen der Verstärkung zwischen dem Emitter des Transistors bzw. der Basis des dritten Transistors und dem wechselstrommäßigen Massepol ein verstellbarer Widerstand angeordnet ist.This task is solved in that the between the input and output terminals arranged four-stage amplifier equipped with transistors is constructed in such a way that the input terminal of the amplifier is connected to the Emitter of the first transistor and by DC coupling to the collector of the second transistor is connected that the base of the first transistor at ground potential and whose collector is connected to the base of the second transistor and via a Resistance is connected to the AC ground pole and that the emitter of the second transistor is connected to the base of the third transistor and the emitter of the third transistor and the collector of the fourth transistor - Both transistors are coupled to one another by direct current coupling - the The output terminal of the amplifier is the collector of the third transistor is connected to the base of the fourth transistor, the two connection points Via a third resistor and the emitter of the fourth transistor in terms of alternating current are at ground potential and to adjust the gain between the emitter of the transistor or the base of the third Transistor and the AC ground pole an adjustable resistor is arranged.
Weitere Ausgestaltangsmerkmale der Erfindung sind dadurch gegeben, daß bei Verzicht auf Gleichstromkopplung Transistoren gleichen Leitfähigkeitstyps Verwendung finden können und daß bei Umpolung der Betriebsspannung für die Transistoren jeweils solche umgekehrten Leitfähigkeitstyps Verwendung finden.Further design features of the invention are given by that if there is no direct current coupling, transistors of the same conductivity type Can be used and that when the polarity of the operating voltage for the transistors is reversed in each case such a reverse conductivity type is used.
Die Anordnung nach der Erfindung hat gegenüber Gabelschaltungen den Vorteil, daß statt der Gabeldämpfung hier Verstärkung möglich ist, außerdem ist die Anordnung integrierbar, da nur Transistoren und -Widerstände verwendet werden.The arrangement according to the invention has compared to hybrid circuits The advantage is that instead of the fork damping, amplification is possible here the arrangement can be integrated, since only transistors and resistors are used.
Gegenüber bekannten Anordnungen mit einer über alle Stufen gehenden Gegenkopplung ergeben sich ein einfacher Aufbau, regelbare Verstärkung und extrem hohe Entkopplungsdåmpfungen, praktisch unabhängig von der Reglerstellung, bei relativ niedrigem Stromverbrauch.Compared to known arrangements with one over all stages Negative coupling results in a simple structure, adjustable gain and extreme high decoupling attenuation, practically independent of the controller position, at relative low power consumption.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712159095 DE2159095C3 (en) | 1971-11-29 | 1971-11-29 | Multi-stage amplifier with adjustable gain with low input and output resistance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712159095 DE2159095C3 (en) | 1971-11-29 | 1971-11-29 | Multi-stage amplifier with adjustable gain with low input and output resistance |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2159095A1 true DE2159095A1 (en) | 1973-05-30 |
DE2159095B2 DE2159095B2 (en) | 1977-06-16 |
DE2159095C3 DE2159095C3 (en) | 1985-01-24 |
Family
ID=5826455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19712159095 Expired DE2159095C3 (en) | 1971-11-29 | 1971-11-29 | Multi-stage amplifier with adjustable gain with low input and output resistance |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2159095C3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4268798A (en) * | 1977-12-19 | 1981-05-19 | Motorola, Inc. | High performance summing amplifier |
US4321553A (en) * | 1979-03-21 | 1982-03-23 | Ford Aerospace & Communications Corp. | Wide bandwidth low distortion amplifier |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7903663A (en) * | 1979-05-10 | 1980-11-12 | Philips Nv | AMPLIFIER FOR APPLICATION IN A LINE CIRCUIT. |
-
1971
- 1971-11-29 DE DE19712159095 patent/DE2159095C3/en not_active Expired
Non-Patent Citations (2)
Title |
---|
"Halbleiter-Schaltbeispiele" Siemens AG, Ausgabe April 1970, S.33 * |
Unterrichtsblätter (B) der Deutschen Bundespost, Jahrgang 18/1965, Nr.2, S.31-44 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4268798A (en) * | 1977-12-19 | 1981-05-19 | Motorola, Inc. | High performance summing amplifier |
US4321553A (en) * | 1979-03-21 | 1982-03-23 | Ford Aerospace & Communications Corp. | Wide bandwidth low distortion amplifier |
Also Published As
Publication number | Publication date |
---|---|
DE2159095C3 (en) | 1985-01-24 |
DE2159095B2 (en) | 1977-06-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8227 | New person/name/address of the applicant |
Free format text: FELTEN & GUILLEAUME FERNMELDEANLAGEN GMBH, 8500 NUERNBERG, DE |
|
8281 | Inventor (new situation) |
Free format text: SCHEMMEL, HANS-ROBERT, DIPL.-ING., 8500 NUERNBERG, DE |
|
C3 | Grant after two publication steps (3rd publication) | ||
8339 | Ceased/non-payment of the annual fee |