A fɛrɛkɛnɛ tun lasigira ka sabu kɛ Harry Nyquist ani Ralph Hartley san 1920 sigiyɔrɔma kɛmɛ kɔnɔnana, ani Claude Shannon san 1940 sigirɔyɔma kɛmɛ kɔnɔnana ka baaraw yɛ.