Question

UJT relaxed Oscillator circuit; Up= 8,7 Volt Vw = 1 Volt n=0.5 Vo= 0,7 Volt c-SuF R = 5kw R2 = 10kn which oscillation con be performed: Resistance volue range through Romina Loka Anox= 120kn a) Drow the Reloxotion Oscillator circuit wilt UJT and write the values of the elements on the scheme. current volues that the circuit 16) Colculate the lp and lv con oscillote with the "UBB" supply oltoge. c) Plot the VE and VBs signol patterns on a scole

Answer 1

VJI RELAXATLON OSCILLATOR: B2 RB2 Rq=10kr Rman =120kn Rmin =Loker tvo B2 E n= RBI RBitRB2 Van ve Rol Ri=5kr =52F By ADVEN, Vp=8,7 VOLT, Vv=I VOLT, VO=0,7 VOLT; N= 0.5 THE EMITTER THRESOLD POTENTIAL, Vp=nrest UD CHERE, VEE So, 8.7 = 0.5 Vert 0,7 = Von=16 VOLT. RESISTANCE). UNTER-BASE vor Vp 6) PEAK CURRENT, Ip = 16-8,7 120x103 Rman = 60.83 X ACAS, Rman = 120kh (ANS) 16 - 1 VBBW AND VALLEY CURRENT, Iv= R min [ASRminalour) 10X 203 165 mA. (ANS). CAPACITOR CHARGING (2=RC) -Ve CAPACITOR DISCHARGING CZ2 = R₂ C) Vp Vv >TIMElt) VBI → TUME I= Ts - RC ent ension). tel