Design a circuit that will SAFELY convert the output of a 60-Hz6.3V (rms) transformer into a source of TTL-level pulses, all withrepetition rate of 60 Hz and in synchronization with the sine wavesthat come from the transformer. The pulses must have a dutycycle of 75% high and 25% low. The circuit's performance mustbe insensittive to variations in the AC input voltage of as much as+/- 1.5 V (rms).