Communication device

A communication device comprising:

• an oscillator configured to output a carrier signal when at least one of an externally input first input signal and second input signal is at a first logic level;
• a first signal generation circuit comprising a first signal generation unit and a first drive circuit, wherein the first signal generation unit is configured to generate a first pulse when detecting a rising edge of the first input signal, output a signal based on and in phase with the carrier signal as a signal including a second and subsequent pulses if the carrier signal is at a second logic level, which differs from the first logic level, at time of detecting the rising edge of the first input signal, and output a signal based on the carrier signal and having a phase inverted from a phase of the carrier signal as a signal including a second and subsequent pulses if the carrier signal is at the first logic level at the time of detecting the rising edge of the first input signal, and the first drive circuit is configured to amplify an output signal of the first signal generation unit;
• a second signal generation circuit comprising a second signal generation unit and a second drive circuit, wherein the second signal generation unit is configured to generate a second pulse when detecting a rising edge of the second input signal, output a signal based on and in phase with the carrier signal as a signal including a second and subsequent pulses if the carrier signal is at the second logic level at time of detecting the rising edge of the second input signal, and output a signal based on the carrier signal and having a phase inverted from the phase of the carrier signal as a signal including a second and subsequent pulses if the carrier signal is at the first logic level at the time of detecting the rising edge of the second input signal, and a second drive circuit is configured to amplify an output signal of the second signal generation unit;
• a first insulation element coupled to an output of the first drive circuit;
• a second insulation element coupled to an output of the second drive circuit;
• a first output circuit configured to receive a signal based on the output signal of the first drive circuit via the first insulation element and externally output a signal based on the received signal;
• and
• a second output circuit configured to receive a signal based on the output signal of the second drive circuit via the second insulation element and externally output a signal based on the received signal.

A communication device comprising:

• an oscillator configured to output a first carrier signal and a second carrier signal when at least one of an externally input first input signal and second input signal is at a first logic level;
• a first signal generation circuit comprising a first delay circuit, a first logic circuit, a second logic circuit, a third logic circuit, and a first drive circuit, wherein the first logic circuit has a first input end to which the first input signal is input and a second input end to which the first input signal is input via the first delay circuit, the second logic circuit has a first input end coupled to an output end of the first logic circuit and a second input end to which the first carrier signal is input, the third logic circuit has a first input end to which the first input signal is input and a second input end coupled to an output end of the second logic circuit, and the first drive circuit is configured to amplify a voltage output by the third logic circuit;
• a second signal generation circuit comprising a second delay circuit, a fourth logic circuit, a fifth logic circuit, a sixth logic circuit, and a second drive circuit, wherein the fourth logic circuit has a first input end to which the second input signal is input and a second input end to which the second input signal is input via the second delay circuit, the fifth logic circuit has a first input end coupled to the output end of the fourth logic circuit and a second input end to which the second carrier signal is input, the sixth logic circuit has a first input end to which the second input signal is input and a second input end coupled to an output end of the fifth logic circuit, and the second drive circuit is configured to amplify a voltage output by the sixth logic circuit;
• a first insulation element coupled to an output of the first drive circuit;
• a second insulation element coupled to an output of the second drive circuit;
• a first output circuit configured to receive a signal based on the output signal of the first drive circuit via the first insulation element and externally output a signal based on the received signal;
• and
• a second output circuit configured to receive a signal based on the output signal of the second drive circuit via the second insulation element and externally output a signal based on the received signal.