The peak voltage is given as, Vp Let 0.8 and putting other values, VD 20 0.8 12.8V Vp The minimum value of can be calculated from Rc Vv Value of can be calculated from R2 104 R2 104 R2 0.6 Here the pulse width is give, that is Hence, value of will be, R1 RC1 The width andC , hence above equation becomes, 50 1 Thus we obtained the values of components in UJT triggering circuit as, , . R1 R2 Rc C 3.9 Synchronized UJT Oscillator A synchronized UJT triggering circuit is as shown in figure below. The diodes rectify the input ac to dc, resistor lowers to a suitable value for the zener diode and UJT. The Rd Vdc
The peak voltage is given as, Vp Let VD 0.8 and putting other values, Vp 20 0.8 12.8V The minimum value of Rc can be calculated from Vv Value of R2 can be calculated from 104 R2 104 R2 0.6 Here the pulse width is give, that is Hence, value of R1 will be, RC1 The width andC , hence above equation becomes, 50 1 Thus we obtained the values of components in UJT triggering circuit as, R1 , R2 Rc C . 3.9 Synchronized UJT Oscillator A synchronized UJT triggering circuit is as shown in figure below. The diodes rectify the input ac to dc, resistor Rd lowers Vdc to a suitable value for the zener diode and UJT. The
U3_L19-Gate-Triggering-Methods.docx