Electronic rotary encoder

The electronic rotary encoder disclosed by the embodiment of the invention is used for being arranged on a vertical rotating shaft in a rotating object to obtain an A-phase signal and a B-phase signal and calculating a rotating speed and a position, and comprises a Hall element which is arranged on one surface of the vertical rotating shaft in the rotating object and is used for outputting a Hall signal as a square wave of the A-phase signal; the two capacitors are used for performing constant-current charging and discharging according to a switch controlled by the A-phase signal and obtaining a first voltage and a second voltage; the two buffer gates are used for outputting waveform signals of a first X voltage and a second X voltage according to a switch controlled by the A-phase signal; the two comparators are used for respectively inputting the first voltage and the first X voltage as well as the second voltage and the second X voltage, comparing the first voltage and the first X voltage and outputting a