Liquid ejecting apparatus, drive circuit, and integrated circuit

A drive circuit comprising:

• a drive signal output circuit that outputs a first drive signal;
• a control signal output circuit that outputs an original control signal;
• a differential signal output circuit that is electrically coupled to the control signal output circuit, converts the original control signal into a pair of differential signals, and outputs the pair of differential signals;
• a drive signal wiring that is electrically coupled to the drive signal output circuit and through which the first drive signal propagates;
• a first signal wiring that is electrically coupled to the differential signal output circuit and through which a first signal of one of the pair of differential signals propagates;
• a second signal wiring that is electrically coupled to the differential signal output circuit and through which a second signal of the other of the pair of differential signals propagates;
• and
• an integrated circuit that is electrically coupled to the drive signal wiring, the first signal wiring, and the second signal wiring, receives the first drive signal, and outputs a second drive signal, wherein
• the integrated circuit includes
• a drive signal input terminal that is electrically coupled to the drive signal wiring and inputs the first drive signal,
• a first signal input terminal that is electrically coupled to the first signal wiring and inputs the first signal,
• a second signal input terminal that is electrically coupled to the second signal wiring and inputs the second signal,
• a differential signal receiving circuit that is electrically coupled to the first signal input terminal and the second signal input terminal, receives the first signal and the second signal, converts the pair of differential signals into a control signal, and outputs the control signal;
• a drive signal selection circuit that is electrically coupled to the drive signal input terminal and the differential signal receiving circuit and outputs the second drive signal based on the control signal and the first drive signal,
• a drive signal output terminal that is electrically coupled to the drive signal selection circuit and outputs the second drive signal,
• wherein the integrated circuit includes
• a first wiring that is electrically coupled to the first signal input terminal and the differential signal receiving circuit,
• a second wiring that is electrically coupled to the second signal input terminal and the differential signal receiving circuit, and
• a resistance element that is electrically coupled to the first wiring and the second wiring, and
• wherein a head unit is electrically coupled to the drive signal wiring, the first signal wiring, and the second signal wiring, and ejects a liquid,
• wherein the head unit includes
• a plurality of the integrated circuits, and
• a resistance value of a resistance element of a first integrated circuit of the plurality of integrated circuits is different from a resistance value of a resistance element of a second integrated circuit of the plurality of integrated circuits.

An integrated circuit comprising:

• a drive signal input terminal that inputs a first drive signal;
• a first signal input terminal that inputs a first signal of one of a pair of differential signals;
• a second signal input terminal that inputs a second signal of the other of the pair of differential signals;
• a differential signal receiving circuit that is electrically coupled to the first signal input terminal and the second signal input terminal, receives the first signal and the second signal, converts the pair of differential signals into a control signal, and outputs the control signal;
• a drive signal selection circuit that is electrically coupled to the drive signal input terminal and the differential signal receiving circuit and outputs a second drive signal based on the control signal and the first drive signal;
• a drive signal output terminal that is electrically coupled to the drive signal selection circuit and outputs the second drive signal;
• and
• drive signal wiring through which the first drive signal propagates,
• wherein the integrated circuit includes
• a first wiring that is electrically coupled to the first signal input terminal and the differential signal receiving circuit,
• a second wiring that is electrically coupled to the second signal input terminal and the differential signal receiving circuit, and
• a resistance element that is electrically coupled to the first wiring and the second wiring, and
• wherein a head unit is electrically coupled to the drive signal wiring, the first signal wiring, and the second signal wiring, and ejects a liquid,
• wherein the head unit includes
• a plurality of the integrated circuits, and
• a resistance value of a resistance element of a first integrated circuit of the plurality of integrated circuits is different from a resistance value of a resistance element of a second integrated circuit of the plurality of integrated circuits.