alternation current circuit {= AC circuit}
earth circuit [= earth return circuit]
enlarged circuit and compensation circuit
single filip-flop circuit (sff circuit)
trip circuit and closing circuit
absorption tube keying system
Amplitude Modulation phase Shift Keying(AM-PSK)
amplitude shift keying {= ASK}
amplitude shift keying demodulator
Amplitude-Shift Keying(ASK)
antipodal chaos shift keying
ASCIIamplitude shift keying
ASIPamplitude shift keying