An electronic device for receiving an input by a digital pen having a waveform generation means is provided. The electronic device includes at least three reception sensors and a processor. The at least three reception sensors are installed in the electronic device at positions that are separated from one another, and are configured to receive a waveform generated by the waveform generator of the digital pen. The processor is configured to calculate an input coordinate of the digital pen using a difference of velocities and reception times of the waveform received by the at least three reception sensors.