To provide a waveform shaping circuit that accurately reproduces an information signal data stream from an information signal component with a DC voltage component superimposed thereon.

A demodulated output signal supplied via an input terminal T11 is supplied via a signal line L12 to a limiter 11, where only a signal level within a prescribed range is extracted and from which its output signal is fed to an LPF 12. The LPF 12 cuts off a high frequency information signal, and an output signal from the LPF 12 and the demodulated output signal from the input terminal T11 are fed to a comparator 13, where the information signal from the demodulated output circuit is extracted.