EQUALIZER AMPLIFIER CIRCUIT

摘要

PURPOSE: To establish an output voltage of a prescribed level without the need for an externally mounted adjustment component by allowing an offset compensation circuit to cancel the offset of a noninverting/inverting DC voltage so as to allow a limiter amplifier to limit an input signal of a prescribed level or over. CONSTITUTION: A limiter amplifier 7 of an equalizer amplifier circuit 1 amplifies a signal give to input terminals 3, 4, and limits the signal of a prescribed level or over. Furthermore, a peak detection circuit 9 detects the peak level of a noninverting and inverting output voltage from an output buffer section 8 and the limiter amplifier 7 to detect a DC offset component. An offset compensation circuit 10 generates the offset compensation signal by the difference from an output signal of the peak detection circuit 9 and provides its output to the output of the limiter amplifier 7. The DC offset is deceased through multi-stage connection of the equalization amplifier circuits 1 of the configuration as above and a prescribed level of an output is obtained by the limiter amplifier 78 of the equalization amplifier circuit 1 of each stage.