Recording element substrate and recording head having the same

A recording element substrate comprising:

• a recording element;
• a first power line configured to supply a first voltage;
• a second power line configured to supply a ground voltage;
• a first voltage conversion circuit including a first input unit configured to receive a first control signal, and a second input unit configured to receive a second voltage, which is higher than the ground voltage, and the first voltage, and to output the first control signal with an increased amplitude;
• a second voltage conversion circuit including a first input unit configured to receive a second control signal, and a second input unit configured to receive a third voltage, which is lower than the first voltage, and the ground voltage, and to output the second control signal with an increased amplitude;
• a PMOS transistor having a drain terminal connected to the first power line, a source terminal connected to one end of the recording element, and a gate terminal connected to an output of the first voltage conversion circuit;
• and
• an NMOS transistor having a drain terminal connected to the second power line, a source terminal connected to the other end of the recording element, and a gate terminal connected to an output of the second voltage conversion circuit.