Patent ID: 8134602
Filing Date: 2012-03-13
Classification: H03F

Abstract:
1. An amplifier circuit comprising: a first operational amplifier in which an input signal is input to a negative input terminal, a reference voltage is input to a positive input terminal, a feedback path from an output terminal to the negative input terminal is formed, and the input signal is amplified by a predetermined amplification factor; and a second operational amplifier in which an output from the first operational amplifier is input to a positive input terminal, the reference voltage is input to a negative input terminal, and a pair of outputs having opposite polarities to each other are obtained at an output terminal; wherein a pair of outputs having opposite polarities to each other and configured to perform BTL drive of a load are obtained as outputs of the second operational amplifier, wherein a resistor is provided in an input line for inputting the input signal to the first operational amplifier, a feedback resistor is provided in the feedback path, and a resistance ratio of these resistors determines the amplification factor of the first operational amplifier, and wherein the input signal is a signal configured to correct for camera shake due to hand movement, and the load is a voice coil motor for carrying out an optical correction.