sir i fabricated one scr circuit for tgiggering thyristor controlled reactor...in my triggering circuit sinusoidal input is given to an integrator..the output of the integrator is given to the precision rectifier..then it is given to a comparator.the output of comparator is given to a monostable multi vibrator(74121).the output of monostable and astable multi vibrator is given to an AND gate...the AND gate output is given to a sl 100 transistor which is given to 1:1:1 pulse transformer...but i didnt get the output from pulse transformer...sir can u pls help me for getting the output...