DE880603C - Amplifier arrangement - Google Patents

Amplifier arrangement

Info

Publication number
DE880603C
DE880603C DEP54731A DEP0054731A DE880603C DE 880603 C DE880603 C DE 880603C DE P54731 A DEP54731 A DE P54731A DE P0054731 A DEP0054731 A DE P0054731A DE 880603 C DE880603 C DE 880603C
Authority
DE
Germany
Prior art keywords
negative feedback
stages
amplifier
points
amplifier arrangement
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
Application number
DEP54731A
Other languages
German (de)
Inventor
Hans Georg Dipl-Ing Thilo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Corp
Original Assignee
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
Priority to DEP54731A priority Critical patent/DE880603C/en
Application granted granted Critical
Publication of DE880603C publication Critical patent/DE880603C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Description

Die Erfindung betrifft eine zwei oder mehr Röhrenstufen enthaltende Verstärkeranordnung mit einem veränderbaren Gegenkopplungsglied zwischen wenigstens zwei Stufen. Wird die Gegenkopplung für die empfindlichsten Meßbereiche, z. B. an Pegelmessern und Röhrenvoltmetern, in definierten Stufen herabgesetzt, so treten bei den bisher üblichen Schaltungen durch Kondensatoraufladungen verursachte Schaltstöße auf, die störend wirken.The invention relates to a tube containing two or more tube stages Amplifier arrangement with a variable negative feedback element between at least two steps. If the negative feedback is used for the most sensitive measuring ranges, e.g. B. at Level meters and tube voltmeters, reduced in defined steps, so step switching surges caused by capacitor charging in the conventional circuits that are bothersome.

Zur Vermeidung der Schaltstöße sieht die Erfindung vor, das veränderbare Gegenkopplungsglied zwischen Punkten gleichen Gleichstrompotentials anzuordnen.To avoid the switching surges, the invention provides that the variable To arrange negative feedback element between points of the same direct current potential.

Wird beispielsweise ein dreistufiger Verstärker nach dem in der Figur dargestellten Schema aufgebaut, so kann man durch Bemessung der Widerstände R i bis R 4 in den Kathodenkreisen der Verstärkerröhren V i und V 3 erreichen, daß die Punkte A und B auf demselben Gleichstrompotential liegen. Durch die Widerstände R 5 bis R 7 fließt kein Gleichstrom, und Schaltstöße treten nicht mehr auf, wenn die Gegenkopplung, z. B. durch wahlweises Kurzschließen von R5 oder R 5 T R6, stufenweise geändert wird. Die Schaltung vermeidet , außerdem Kopplungskondensatoren im Gegenkopplungskreis, die leicht zu unerwünschten Phasendrehungen bei tiefen Frequenzen führen.For example, if a three-stage amplifier is used according to the one in the figure shown scheme, so one can by dimensioning the resistances R i to R 4 in the cathode circuits of the amplifier tubes V i and V 3 achieve that the Points A and B are on the same DC potential. Through the resistances R 5 to R 7 no direct current flows, and switching surges no longer occur when the negative feedback, e.g. B. by optionally short-circuiting R5 or R 5 T R6, in stages will be changed. The circuit also avoids coupling capacitors in the negative feedback circuit, which easily lead to undesirable phase shifts at low frequencies.

Claims (3)

PATENTANSPRÜCHE: i. Zwei oder mehr Röhrenstufen enthaltende Verstärkeranordnung mit einem veränderbaren Gegenkopplungsglied zwischen wenigstens zwei Stufen, dadurch gekennzeichnet, daß das veränderbare Gegenkopplungsglied zwischen Punkten gleichen Gleichstrompotentials dieser Verstärkerstufen angeordnet ist. PATENT CLAIMS: i. Amplifier arrangement containing two or more tube stages with a variable negative feedback element between at least two stages, thereby characterized in that the variable negative feedback element is the same between points DC potential of these amplifier stages is arranged. 2. Verstärkeranordnung nach Anspruch i, dadurch gekennzeichnet, daß das veränderbare Gegenkopplungsglied zwischen zwei Punkte von Kathodenkreisen verschiedener Stufen geschaltet ist und die in den Kathodenkreisen angeordneten Widerstände so bemessen sind, daß diese Punkte auf demselben Gleichstrompotential liegen. 2. Amplifier arrangement according to claim i, characterized in that the variable negative feedback element is connected between two points of cathode circuits of different stages and the resistors arranged in the cathode circuits are dimensioned so that these Points are on the same DC potential. 3. Verstärkeranordnung nach Anspruch i und 2, dadurch gekennzeichnet, daß der Gegenkopplungskreis im wesentlichen nur Ohmsche Widerstände enthält. Angezogene Druckschriften Deutsche Patentschrift Nr. 740 299; Pitsch »Lehrbuch der Funkempfangstechnik« 1948, S. 534; Zeitschrift »Radio-Amateur« Okt.1938, S.578ff.; Lehrbuch »Funkempfangstechnik« v. Helm. P i t s c h , erschienen Nov. 1948, Akad. Verl. Ges. Geest &. Portig K. G., S. 6i8, Abb. 692, 694, 696; italienische Patentschrift Nr. 380 974 Electronies, Aug. 1949, S. 98; Hausmitteilungen der Fernseh G. m. b. H., Heft 6 März 1943, S.168ff., Aufsatz 2,Breitbandverstärker mit Gegenkopplung«; Empfänger-Vademecum, Jahrg.1947, Schaltbild Gerät »75o A/30« der Firma Philips.3. Amplifier arrangement according to claim i and 2, characterized in that the negative feedback circuit contains essentially only ohmic resistances. Referred publications German Patent No. 740 299; Pitsch "Textbook of radio reception technology" 1948, p. 534; "Radio-Amateur" magazine Oct. 1938, p.578ff .; Textbook "Radio Reception Technology" v. Helmet. Pitsch, published Nov. 1948, Akad. Verl. Ges. Geest &. Portig KG, pp. 6i8, Figs. 692, 694, 696; Italian Patent No. 380 974 Electronies, Aug. 1949, p. 98; In-house communications from the Fernseh G. mb H., issue 6 March 1943, p.168ff., Essay 2, broadband amplifier with negative feedback "; Receiver vademecum, year 1947, circuit diagram device "75o A / 30" from Philips.
DEP54731A 1949-09-13 1949-09-13 Amplifier arrangement Expired DE880603C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP54731A DE880603C (en) 1949-09-13 1949-09-13 Amplifier arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP54731A DE880603C (en) 1949-09-13 1949-09-13 Amplifier arrangement

Publications (1)

Publication Number Publication Date
DE880603C true DE880603C (en) 1953-06-22

Family

ID=7387281

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP54731A Expired DE880603C (en) 1949-09-13 1949-09-13 Amplifier arrangement

Country Status (1)

Country Link
DE (1) DE880603C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2906829A (en) * 1954-12-09 1959-09-29 Itt Means reducing noise effects in television receivers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740299C (en) * 1938-04-01 1943-10-16 Telefunken Gmbh Amplifier for a wide frequency band

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740299C (en) * 1938-04-01 1943-10-16 Telefunken Gmbh Amplifier for a wide frequency band

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2906829A (en) * 1954-12-09 1959-09-29 Itt Means reducing noise effects in television receivers

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