inventor91 Member Member since Jun 16, 2010 Last active Jun 20, 2010 Total activities 0 Activity feed Recent contributions #Threads 16 years ago please help, circuit for ask,fsk,psk,qpsk modulators and demodulators Hi folks, i need simple circuit for ask,psk,qpsk,fsk modulators as well as demodulators... It's very much urgent😔.please help buddies....