Load Driving Circuit

A load drive circuit comprising:

• an output terminal to which a load should be connected;
• an input terminal to which an input signal should be given;
• a final amplifier including an output element for driving the load;
• a preamplifier for driving an output element included in the final amplifier according to the input signal;
• and
• a phase compensator for improving a phase characteristic between input and output signal waveforms,
• an output signal of a non-inverting form appearing in the output terminal according to the input signal given to the input terminal, characterized in that
• the phase compensator is constituted by inserting series circuits of nonlinear resistive elements and switch elements between a control input terminal of the output element of the final amplifier and the output terminal of the load drive circuit,
• the nonlinear resistive element has a nonlinear characteristic in which a resistance value decreases as an applied voltage value increases and the resistance value increases as the applied voltage value decreases, and
• the switch elements are switching-controlled to selectively come into an ON state only in a high-electric potential period or a low-electric potential period of the input signal according to whether the output element is arranged on a high-electric potential side or a low-electric potential side in the final amplifier.