Snmek 1

Educational program: Mechanic electrician

Program title: Technical training II. class Two- stage amplifierWorked out: Bc. Chumchal Miroslav

Project technical subjects in English, CZ.1.07/1.3.09/04.0002Co- finance by Europian social fund and by state budget of The Czech Republic.

Scheme of connection of two- stage amplifierDescription of two- stage amplifier Design of printed circuit from the side of components and circuitsComponents specification Construction of two- stage amplifierStudents activitiesControl questions

Two- stage amplifier

Two- stage amplifier

Connection scheme of two- stage amplifier

Ordering of voltage amplifiers in consecutiveDirectly bounded two- stage amplifierStabilization of operating point of two- stage amplifierAmplification of amplifierInput voltageOutput voltagePrinciples of construction of two- stage amplifierFrequency attribute

Description of amplifier and its construction

Design of printed circuit from the side of components and circuits

Components Value Note T1, T2 BC 548UCC =4,5-15V R1 10K R2 22K R3 5K6 R4 2K2 R5 470 C1 5M/15 C2,C3 10M/15 P1 150K P2 100KComponents specification

Supply voltage is connected through filter member ( brum, oscillating )Equipped by any kind of nf. transistors of BC type Printed circuit firstly equipped by R, than another components and by electrolytic condensers in the end .Among condensers, resistances and printed circuit let a gap about 1 mm, influence of temperature on the printed circuit board.Do not shorten terminal of the transistors.Finally soldered resistance R2.

Instruction for construction of amplifier

Realize connection of two- stage amplifier on the printed circuit board.Individually design connection by the pattern from the side of the components and from the side of the circuit.Take their measurement before soldering of components.After soldered make recovery and measurement of amplifier.Take measurement amplitude frequency characteristic of amplifier.

Entering to students- practical part

Explain how is calculate amplification of amplifier ?Calculate a gain of amplifier.Compare volumes of two- stage amplifier with amplifiers SE, SB, SK and explain it.

Control questions

Poznvme Elektroniku I.,Vclav Malina, Vydalo nakladatelstv KOPP,esk Budjovice, 1996www.google/Wikipedie - dvoustupov zesilovaeVlastn poznmkov seitLiterature used