Educational program: Mechanic - electrician Title of program: Technical training II. class Transistor´s stage with common collector 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 the transistor´s stage with CC (SK) Recessing drawing Amplifier with common collector Components specification Properties of the amplifier with CC (SK) Students activities Control questions Connection of the transistor with common collector
Connection scheme of transistor´s stage with CC
Recessing drawing
The amplifier with common collector
Components Value T NPN ( BC 548 ) R1 10K R2 M1 R3 4K7 R4 470 C1, C3 1M/16V C2 20M/16V Components specification
Qantity Value Input resistance ( R VST ) Very big ( 10K – 50OK ) Output resistance ( R VÝST ) Very small ( 10 ohm – 1K ) Voltage amlification ( A U ) none Current amlification ( A I ) big ( 20 – 200 ) Efficiency amlification ( A P ) small ( 10 – 200 ) Connection properties of the amplifier with CC
Implement a connection with cc (sk) on a circuit board. Design a connection according to the scheme on a circuit board, independently. Before soldering of components take their measurement. After soldering, check out your practice work and take their measurement. Students activities
What voltage you can measure on the transistors electrodes ? How big electric current passing through by circuit ? Calculate amplification of amplifier A U and compare with connection with SE, SB. Calculate the gain in dB and compare with connection with SE, SB too. Make evaluation of 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