Transmission device and electronic device

A transmission device comprising:

• a signal source configured to output a local signal with a first frequency;
• a differential output circuit coupled to an output side of the signal source, and configured to generate, from the local signal, a differential signal that includes a first local signal and a second local signal obtained by inverting a phase of the first local signal and to output the differential signal;
• a first amplifier provided with an output side of the differential output circuit, and configured to amplify the first local signal;
• a second amplifier provided with an output side of the differential output circuit, and configured to amplify the second local signal;
• a first mixer configured to mix a first input signal with an intermediate frequency and the first local signal amplified by the first amplifier and to output a first output signal;
• a second mixer configured to mix a second input signal obtained by inverting a phase of the first input signal and the second local signal and to output a second output signal;
• a third mixer configured to mix the first output signal output from the first mixer and the local signal and to output a third output signal;
• a fourth mixer configured to mix the second output signal output from the second mixer and the local signal and to output a fourth output signal;
• and
• an adder configured to add the third output signal output from the third mixer and the fourth output signal output from the fourth mixer.

An electronic device comprising:

• a data output device configured to output a first input signal with an intermediate frequency;
• and
• a transmission device configured to include
• a signal source configured to output a local signal with a first frequency,
• a first amplifier configured to amplify the local signal output from the signal source,
• a first mixer configured to mix the first input signal and the local signal amplified by the first amplifier and to output a first output signal, and
• a second mixer configured to mix the first output signal output from the first mixer and the local signal amplified by the first amplifier and to output a second output signal.