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Educational program: Mechanic – electrician Program title: Technical training II. c lass Two - stage amplifier Worked out: Bc. Chumchal Miroslav. Project technical subjects in English, CZ.1.07/1.3.09/04.0002 Co- finance by Europian social fund and by state budget of The Czech Republic
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Educational program: Mechanic– electrician Program title: Technical training II. class Two- stage amplifier Worked out: Bc. ChumchalMiroslav Project technical subjects in English, CZ.1.07/1.3.09/04.0002 Co- finance by Europian social fund and by state budget of The Czech Republic .
Two- stage amplifier • Scheme of connection of two- stage amplifier • Description of two- stage amplifier • Design of printed circuit from the side of components and circuits • Components specification • Construction of two- stage amplifier • Students activities • Control questions
Description of amplifier and its construction • Ordering of voltage amplifiers in consecutive • Directly bounded two- stage amplifier • Stabilization of operating point of two- stage amplifier • Amplification of amplifier • Input voltage • Output voltage • Principles of construction of two- stage amplifier • Frequency attribute
Design of printed circuit from the side of components and circuits
Instruction for construction of amplifier 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.
Entering to students- practical part • 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.
Control questions • 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.
Literature used • Poznáváme Elektroniku I.,Václav Malina, Vydalo nakladatelství KOPP,České Budějovice, 1996 • www.google/Wikipedie - dvoustupňové zesilovače • Vlastní poznámkový sešit