DE2558718A1 - Power stage with quiescent current set automatically - consists of four cross coupled transistors with output taken from emitter connections - Google Patents

Power stage with quiescent current set automatically - consists of four cross coupled transistors with output taken from emitter connections

Info

Publication number
DE2558718A1
DE2558718A1 DE19752558718 DE2558718A DE2558718A1 DE 2558718 A1 DE2558718 A1 DE 2558718A1 DE 19752558718 DE19752558718 DE 19752558718 DE 2558718 A DE2558718 A DE 2558718A DE 2558718 A1 DE2558718 A1 DE 2558718A1
Authority
DE
Germany
Prior art keywords
quiescent current
output
transistor
current set
power stage
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.)
Ceased
Application number
DE19752558718
Other languages
German (de)
Inventor
Arnolf Schlafke
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19752558718 priority Critical patent/DE2558718A1/en
Publication of DE2558718A1 publication Critical patent/DE2558718A1/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3069—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output
    • H03F3/3076—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with symmetrical driving of the end stage

Landscapes

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

Abstract

The power stage has its quiescent current set automatically and consists of 4 cross-coupled transistors. The input signal is applied to the bases of a pnp and a npn transistor whose collectors are coupled to opposite supply poles. The emitter of the npn transistor is cross-coupled to the base of a pnp output transistor and the emitter of the pnp transistor is cross-coupled to the base of an npn output transistor. The bases of the output transistors are biased via resistors and the output is taken from the connection between the emitters of the output transistors.

Description

Beschreibung0 Automatische Ruhestromeinstellung bei Transistorleistungsstufen.Description0 Automatic quiescent current setting for transistor power levels.

Die Transistoren 1 npn und 4 pnp , sowie die Transistoren 2 pnp und 3 npn sind gemaß Zeichnung galvanisch gekoppelt.The transistors 1 npn and 4 pnp, and the transistors 2 pnp and 3 npn are galvanically coupled according to the drawing.

Die Basisanschlüsse von Transistor 1 und 2 sind direkt mit = einander verbunden, ebenso die Emitteranschlüsse von Transis = tor 3 und 4o Die Signaleinspeisung erfolgt an den Basen Transistor 1 und 2.The base connections of transistor 1 and 2 are directly with each other connected, also the emitter connections of transistor 3 and 4o the signal feed takes place at the bases of transistor 1 and 2.

Die Entnahme des stromverstärkten Signales erfolgt an den Emittern der Transistoren 3 und 4.The current-amplified signal is taken from the emitters of transistors 3 and 4.

Der für verzerrungsfreie Signalwiedergabe erforderliche Ruhe = strom in Transistor 3 und 4 kommt erfindungsgemäß wie folgt zustande: Uber die Widerstände Rv + und Rv - werden die Transistoren 1 und 2 in den Leitzustand gebracht. An den Knotenpunkten Tr 1E - Rv - - Tr 4B und Tr 2E - Rv + - Tr 3B entstehen vorzeichen = richtige Vorspannungen der gestalt, daß auch Tr 3 und 4 in den Leitzustand gebracht werden.The quiescent current required for distortion-free signal reproduction in transistor 3 and 4 according to the invention comes about as follows: Via the resistors Rv + and Rv - the transistors 1 and 2 are brought into the conductive state. To the Nodes Tr 1E - Rv - - Tr 4B and Tr 2E - Rv + - Tr 3B arise signs = correct biases of the gestalt that also Tr 3 and 4 brought into the conductive state will.

Dadurch kann ohne besondere Einstellmaßnahmen der benötigte Ruhestrom erzwungen werdenAs a result, the required quiescent current can be achieved without special setting measures be forced

Claims (1)

Patentanspruch.Claim. Automatische Ruhestromeinstellung bei Transistor - Leistungs = stufen - dadurch gekennzeichnet, daß aes Ruhestrom in der Endstufe gemäß Zeichnung und Beschreibung lo durch die kreuzweise gavanische Kopplung je eines npn und pnp Transistors und 2. vorzeichenrichtige Vorspannung der Kopplungspunkte über die Widerstände Rv + und Rv zustande kommt,Automatic quiescent current setting for transistor power levels - characterized in that aes quiescent current in the output stage according to the drawing and Description lo through the cross-Gavanese coupling of one npn and one pnp transistor and 2. bias of the coupling points with the correct sign via the resistors Rv + and Rv comes about,
DE19752558718 1975-12-24 1975-12-24 Power stage with quiescent current set automatically - consists of four cross coupled transistors with output taken from emitter connections Ceased DE2558718A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752558718 DE2558718A1 (en) 1975-12-24 1975-12-24 Power stage with quiescent current set automatically - consists of four cross coupled transistors with output taken from emitter connections

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752558718 DE2558718A1 (en) 1975-12-24 1975-12-24 Power stage with quiescent current set automatically - consists of four cross coupled transistors with output taken from emitter connections

Publications (1)

Publication Number Publication Date
DE2558718A1 true DE2558718A1 (en) 1977-07-14

Family

ID=5965656

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752558718 Ceased DE2558718A1 (en) 1975-12-24 1975-12-24 Power stage with quiescent current set automatically - consists of four cross coupled transistors with output taken from emitter connections

Country Status (1)

Country Link
DE (1) DE2558718A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126330A2 (en) * 1983-05-18 1984-11-28 Genrad, Inc. Enhanced-accuracy semiconductor power amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126330A2 (en) * 1983-05-18 1984-11-28 Genrad, Inc. Enhanced-accuracy semiconductor power amplifier
EP0126330A3 (en) * 1983-05-18 1987-05-27 Genrad, Inc. Enhanced-accuracy semiconductor power amplifier
EP0401869A1 (en) * 1983-05-18 1990-12-12 Genrad, Inc. Enhanced-aaccuracy semiconductor power amplifier

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8131 Rejection