Waveform converter for altering the frequency spectrum of an output signal

Claim 1

A waveform converter comprising: an input terminal, an output terminal and a ground, a first capacitor having one end connected to said input terminal and the other end connected to one end of a first resistor, the other end of said first resistor being connected to said output terminal, a first switching device connected between said one end of said first resistor and said output terminal, a second resistor connected between said output terminal and said ground, a second switching device connected in parallel with a third resistor, one end of said parallel connection being connected to said output terminal, a second capacitor connected between the other end of said parallel connection and ground, one of said first and second switching devices being rendered conductive and the other being rendered non-conductive in response to a change of a square wave signal applied to said input terminal from a first to a second potential and said other of said switching devices being rendered conductive and said one of said switching devices being rendered non-conductive in response to a change of said square wave input signal from said second to said first potential, whereby said first capacitor and said second resistor substantially constitutes a differentiating circuit and said first resistor and said seacond capacitor substantially constitutes an integration circuit.