Amplifier circuit and liquid-crystal display unit using the same

An amplifier circuit including a signal input terminal and a signal output terminal, comprising:

• a plurality of amplification stages including at least an input amplification stage and an output amplification stage which are cascade-connected between the signal input terminal and the signal output terminal;
• a resistor circuit including at least one resistor connected between an output terminal of the output amplification stage and the signal output terminal, to make a first pole, a second pole and a zero point according to following equations:
• the first pole frequency (rad/sec)=1/((R2+Rf)CL)
• where
• R2>>Rf, the first pole frequency =1/(R2·CL)
• the second pole frequency (rad/sec)=1/(R1·C1)
• the zero frequency (rad/sec)=1/(Rf·CL)
• where R1 indicates a parallel combined resistance of an output resistance of the input amplification stage and an input resistance of the output amplification stage, C1 a capacitive component at the output terminal of the input amplification stage, R2 an output resistance of the output amplification stage, Rf a resistive component of the resistor circuit, and CL a capacitive load.