DEP0054731DA - Amplifier arrangement - Google Patents
Amplifier arrangementInfo
- Publication number
- DEP0054731DA DEP0054731DA DEP0054731DA DE P0054731D A DEP0054731D A DE P0054731DA DE P0054731D A DEP0054731D A DE P0054731DA
- Authority
- DE
- Germany
- Prior art keywords
- amplifier arrangement
- negative feedback
- points
- stages
- feedback element
- 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
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
Description
Siemens So Halske München, den.IV-,Siemens So Halske Munich, IV-,
Aktiengesellschaft Dienerstr. 15Aktiengesellschaft Dienerstr. 15th
a O *> Λ rva O *> Λ rv
r.Al\5ou4:4r.Al \ 5ou4: 4
Verstärkeranordnung.Amplifier arrangement.
Die Erfindung betrifft eine awei oder mehr Röhrenstufen enthaltende Verstärkeranordnung mit einem veränderbaren Gegen-. kopplungsglied zvd-schen wenigstens zwei Stufen. V/ird die Gegenkopplung für die empfindlichsten Messbereiche z.B. an Pegelmessern und RÖhrenvoltrsetern in definierten Stufen herabgesetzt, so treten bei den bisher Üblichen Schaltungen durch Kondensatoraufladungen verursachte Schaltstösse auf, die störend wirken. " .The invention relates to an amplifier arrangement containing awei or more tube stages and having a variable counterpart. coupling member zvd -schen at least two stages. The negative feedback for the most sensitive measuring ranges, e.g. on level meters and tube voltages are reduced in defined steps, so occur with the usual circuits Capacitor charges cause switching surges that have a disruptive effect. ".
Zur Vermeidung der Schaltstösse sieht die Erfindung vor} das voränderbare Gegenkopplungsglied zwischen Punkten gleichen Gleichstrompotentials· anzuordnen.To avoid the shifting shocks, the invention provides to arrange · the voränderbare feedback link between points same DC potential before}.
Wird beispielsweise ein dreistufiger Verstärker noch dem in der Figur dargestellten Scheu.a aufgebaut, so kann man durch Bemessung der Widerstände R1 bis R4 in den Eathodenkreisen' der Verstärkerröhren V1 und V3 erreichen, dass die Punkte A und B auf demselben Gleichstrompotential liegen. Durch die Widerstände R5 bis R? fliesst kein Gleichström und Schaltstösse treten nicht mehr auf, wenn die Gegenkopplung s.3. durch wahlweises Kurzschliessen von"R5 oder R5 + Ro- stufenweise geändert wird. Die Schaltung vermeidet ausserdem Kopplungskondensatoren im Gügenkopplungskreis, die leicht zu unerwünschten Phasendrehungen bei tiefen Frequenzen führen.If, for example, a three-stage amplifier is built according to the Scheu.a shown in the figure, you can go through Dimensioning of the resistors R1 to R4 in the cathode circuits of the amplifier tubes V1 and V3 achieve that the points A. and B are at the same DC potential. Through the resistors R5 to R? there is no direct current and no switching shocks no longer occur if the negative feedback see 3. by either short-circuiting "R5 or R5 + Ro- in stages will be changed. The circuit also avoids coupling capacitors in the Gügen coupling circuit, which can easily become undesirable Lead phase rotations at low frequencies.
Anlagen? 3 Ansprache " Kch/Sg»Investments? 3 speech "Kch / Sg"
1 Figur ■ ...1 figure ■ ...
Claims (1)
Family
ID=
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