A Digital Receiver for Tone Detection Applications
T. Claasen, Joshua Peek · IRE Transactions on Communications Systems · 1976
A digital circuit suitable for detection of tones in signaling applications is described. The amount of hardware required for the realization of the circuit is shown to be quite small. The circuit may be used for both analog and digital input signals. For analog signals, the necessary A/D conversion becomes very simple. Results of simulations on a digital computer are given that indicate the good performance of the circuit.