Design the triggering circuit of Figure Q3 below The paramet
Design the triggering circuit of Figure Q3 below. The parameters of the programmable unijunction transistor (PUT) are V_s = 35V, I_G = 1.5 mA. The frequency of oscillation f = 85 kHz. The pulse width tg = 40 mus, and the peak triggering pulse V_RR = 10 V.
Solution
Vp = 0.7V + Vg
VG=10-0.7=9.3V= ETA * VBB
HERE VBB =35 V
ETA=9.3/35 = R1/R1+R2 ...... EQN 1
F = 1/ (RC ln(1/(1-))............. WHERE RC=TG
CALULATE ETA FROM ABOVE ...GET ONE MORE EQN OF ETA AND GET R1 AND R2
