Educational program: Mechanic - electrician Title of program: Technical training II. class Transistor stage with common emitter Worked out: Bc. Chumchal Miroslav Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/ je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.
Scheme of connection of stage with SE Equivalent connection Amplifier with common emitter Components specification Properties of amplifier with SE Students activities Control questions Connection of transistor with common emitter
Scheme of connection of transistor stage with SE
Equivalent connection of transistor stage with SE
Amplifier with common emitter
Components Value T NPN ( BC 548 ) R1 M1 R2 10K R3 470 R4 4K7 C1, C2 1M/16V C3 20M/16V Components specification
Quantity Value Input resistance ( R VST ) small - medium ( 100 ohm – 10k ) Output resistance ( R VÝST ) big ( 1k – 100k ) Voltage amplification ( A U ) big ( 10 – 1000 ) Current amplification ( A i ) Very big ( 20 – 200 ) Efficiency amplification ( A P ) Very big ( 100 – ) Properties of connection of amplifier with SE
Design connection of amplifier with common emitter on the cuprexite board. Take measurement of components on own measure device and solder it together. Activate the amplifier. Evaluate your work. Practical part of assigned task
What voltage we can measure on transistor electrode ? How big electric current passing through the circuit ? Calculate amplification of amplifier A U. Calculate gain of amplifier in dB. Evaluate your work. Students activities- control questions
Poznáváme Elektroniku I.,Václav Malina, Vydalo nakladatelství KOPP,České Budějovice, 1996 vypočet tranzistorového stupně Vlastní poznámkový sešit Literature used