Intermittent operation circuit and modulation device

A modulator comprising:

• an intermittent operation circuit comprising:
• an active circuit having an active element,
• a first control signal generation circuit that generates a first control signal that controls operation starting and operation stopping of said active circuit,
• a second control signal generation circuit that generates a second control signal that causes said active circuit to perform ringing oscillation and control a value of frequency or amplitude of said ringing oscillation, and
• a timing adjustment circuit that adjusts input timing of said first and second control signals to said active circuit so that said ringing oscillation and oscillation generated by operation of said active circuit are outputted continuously from said active circuit;
• and
• a transmit signal supply section that inputs a transmit signal that is transmit data, to said first and second control signal generation circuits of said intermittent operation circuit,
• wherein said intermittent operation circuit changes at least one of an absolute value of a voltage value of said first control signal, an absolute value of a voltage value of said second control signal, and a gradient of a rise of said second control signal, based on said transmit signal, and outputs a modulated signal resulting from modulation of said transmit signal.

A modulator comprising:

• a plurality of intermittent operation circuits that have different circuit constants and which each receive a transmit signal that is transmit data, each of said plurality of intermittent operation circuits comprising:
• an active circuit having an active element,
• a first control signal generation circuit that generates a first control signal that controls operation starting and operation stopping of said active circuit,
• a second control signal generation circuit that generates a second control signal that causes said active circuit to perform ringing oscillation and control a value of frequency or amplitude of said ringing oscillation, and
• a timing adjustment circuit that adjusts input timing of said first and second control signals to said active circuit so that said ringing oscillation and oscillation generated by operation of said active circuit are outputted continuously from said active circuit;
• and
• an output switching circuit that receives, as an input, signals outputted from said plurality of intermittent operation circuits, and switches which signal is to be outputted from among said received signals, based on said transmit signal.