ELETRONI DEVIES Assist. prof. Laura-Nicoleta IVANIU, Ph.D. Introduction..
Introduction.. ontents ourse presentation Desired outcome. Ealuation. Laura-Nicoleta IVANIU, Electronic deices 2
Introduction.. ourse presentation Electrical signals Relations and laws for electrical circuits R circuits time and frequency response Diodes (D Types, operating principle, characteristic, parameters Diode circuits Zener diodes, LEDs Operational Amplifiers (OpAmps Ideal OpAmp, operating principle, characteristics, parameters, operating modes OpAmp comparators OpAmp amplifiers Applications with OpAmp Transistors (T Types, operating principles, characteristics, parameters Bipolar junction transistors (BJTs Field-effect transistors (MOSFET Laura-Nicoleta IVANIU, Electronic deices 3
Introduction.. At the end of the semester, you will be able to Design and re-design basic circuits with electronic deices Use the basic applications of electronic deices Use electronic deices in different operating regimes Abilities Determine the performance of basic electronic circuits Determine the operating regime of electronic deices haracterize the behaior of an electronic deice in its quiescent point Laura-Nicoleta IVANIU, Electronic deices 4
Introduction.. Proided that you spend ourse 2 h/week * 4 weeks = 28 h Lab 2 h/week * 4 weeks = 28 h ED ourse & lab preparation, homework 2 h/week * 4 weeks = 28 h Indiidual study 35 h www.bel.utcluj.ro/dce/didactic/ed/ed.htm Laura-Nicoleta IVANIU, Electronic deices 5
Introduction.. Ealuation Written exam (E 0 0 points Laboratory (L 0 0 points ourse homeworks (H 0 0 points problem soling full attendance actiity practical test 0 homeworks - optional NO NO L 5p YES E 4p YES See you next year! Grade = 4 Fail! Laura-Nicoleta IVANIU, Electronic deices 0,7E+0,3L+0,H 4,5 YES Grade=min(0;0,7E+0,3L+0,H Pass! 6
Introduction.. Electrical signals V I [V] i [V] a b Time ariation of a: a continuous oltage (dc; b sinusoidal oltage (ac Laura-Nicoleta IVANIU, Electronic deices 7
Introduction.. Sources. Notations. ac oltage dc oltage current Laura-Nicoleta IVANIU, Electronic deices 8
Introduction.. Ohm s law. Kirchhoff s laws. Ohm s law R i S R R Kirchhoff s oltage law (KVL S R 0 Laura-Nicoleta IVANIU, Electronic deices 9
Introduction.. Resistie diider input R kp R P out in in output Adjustable oltage diider Laura-Nicoleta IVANIU, Electronic deices 0
Introduction.. Superposition method V O = V O +V O2 Laura-Nicoleta IVANIU, Electronic deices
Introduction.. Millman s theorem (nodes potential theorem M - the reference point (ground Laura-Nicoleta IVANIU, Electronic deices 2
Introduction.. Power. Power transfer. P S =V S I=0V (-5mA=-50mW; the power is generated by the source. P R =V R I =0V 5mA=50mW; the power is dissipated by the resistor. Laura-Nicoleta IVANIU, Electronic deices 3
Introduction.. R circuits Relation between current and oltage: i d ( t i ( t Assuming finite ariations: dt i t Laura-Nicoleta IVANIU, Electronic deices 4
Introduction.. R circuits time domain analysis I R circuit with a dc oltage source t ( t (0 e ( e ( Ri d i R R ( t time constant of the circuit t ( t t i ( t ( t d dt t d ( t dt t I dt t I t Laura-Nicoleta IVANIU, Electronic deices 5
Introduction.. R circuits time domain analysis R circuit with a dc oltage source I t t ( t (0 e ( e ( ( (t (0 Laura-Nicoleta IVANIU, Electronic deices 6
Introduction.. R circuits time domain analysis R circuit with an ac oltage source t t ( t (0 e ( e ( ( t O? Laura-Nicoleta IVANIU, Electronic deices 7
Introduction.. R circuits time domain analysis R circuit with an ac oltage source t t ( t (0 e ( e ( T T 5 ; 2 0 T 2 5 Laura-Nicoleta IVANIU, Electronic deices 8
Introduction.. apacitor charging under a constant current d ( t c t t 0 i i c t dt ( t dt (0 ( t It (0 Laura-Nicoleta IVANIU, Electronic deices 9
Introduction.. R circuit frequency response Z j Low frequency: f 0; Z ; output opencircuit; ( j ( j High frequency: f ; Z 0; output short - circuit; ( j 0 O O I pass don t pass (reject First order, passie, low-pass filter (LPF Laura-Nicoleta IVANIU, Electronic deices 20
2 Laura-Nicoleta IVANIU, Electronic deices Introduction.. R circuit frequency response passie low-pass filter (LPF Transfer function R j j j j F I O ( ( ( R R R j F f j F f ( high; ( ery low; 0 0 2 ( ( R j F ( ( R arctg R f 2 0 ut-off frequency
Introduction.. R circuit frequency response passie low-pass filter (LPF F(j 0 0 0-0 -2 0-3 -3dB 0 0 0 0 2 0 3 0 4 0 5 0 6 0 7 frequency [Hz] slope: -20dB/decade magnitude response (log-log plot 0 phase [degree] -20-40 -60-45 o -90 o -80 0 0 0 0 2 0 3 0 4 0 5 0 6 0 7 frequency [Hz] phase response (lin-log plot Laura-Nicoleta IVANIU, Electronic deices 22
Introduction.. R circuit frequency response Z j Low frequency: f 0; Z ; input output opencircuit; ( j 0 High frequency: O don t pass (reject f ; Z 0; input output short - circuit; ( j ( j First order, passie, high-pass filter (HPF O I pass Laura-Nicoleta IVANIU, Electronic deices 23
Introduction.. R circuit frequency response Transfer function F( j O I ( j ( j passie high-pass filter (HPF jr jr F( j R ( R 2 o ( 90 arctg ( R f f ery high; low; F( 0 R 0 F( j Laura-Nicoleta IVANIU, Electronic deices j R R f 2R 0 ut-off frequency 24
Introduction.. R circuit frequency response passie high-pass filter (HPF F(j phase [degree] 0 0 0-0 -2 0-3 0-0 0 0 0 2 0 3 0 4 0 5 90 80 60 40 20 0 slope: +20dB/decad e Laura-Nicoleta IVANIU, Electronic deices frequency [Hz] 45 o 0-0 0 0 0 2 0 3 0 4 0 5 frequency [Hz] -3dB magnitude response (log-log plot phase response (lin-log plot 25
Introduction.. R circuit frequency response Z j Second order, passie, band-pass filter (HPF Laura-Nicoleta IVANIU, Electronic deices 26
Introduction.. R circuit frequency response passie band-pass filter (BPF Transfer function F( j O I ( j ( j ( jr jr ( jr 2 2 F( j ( R R 2 ( R 2 2 2 o ( 90 arctg ( R arctg ( R2 2 f L ut-off frequencies 2R H 2 f R 2 2 Bandwidth B f H f L Laura-Nicoleta IVANIU, Electronic deices 27
Introduction.. R circuit frequency response passie band-pass filter (BPF F(j 0 0 0 - slope: +20dB/dec. -3dB B -3dB slope: -20dB/dec. magnitude response (log-log plot 0-2 90 0-0 0 0 0 2 0 3 0 4 0 5 0 6 0 7 0 8 50 +45 o f L frequency [Hz] f H phase [degree] 0-50 -90-45 o 0-0 0 0 0 2 0 3 0 4 0 5 0 6 0 7 0 8 Laura-Nicoleta IVANIU, Electronic deices frequency [Hz] phase response (lin-log plot 28
Introduction.. Summary The trip down memory lane reied knowledge about: Electrical signals, sources Ohm s law Kirchhoff s law Resistie diider Superposition method Millman s theorem R circuits time and frequency domain behaiors, filters Next week: Diodes. DR circuits. Laura-Nicoleta IVANIU, Electronic deices 29