Loudness control circuit

DETAILED DESCRIPTION Accordingly, an object of this invention is to provide a loudness control circuit in which the above-described difficulty that the weighting cannot be sufficiently achieved depending on the postion of the sliding contact of the variable resistor in the conventional loudness control circuit, has been eliminated.
Another object of the invention is to provide a loudness control circuit which can be provided in the form of an integrated circuit, and in which as the volume is decreased, the sound in the high and low frequency ranges is automatically boosted with the aid of DC voltages outputted by variable DC voltage sources.
A further object of the invention is to provide a loudness control circuit in which the sound in the low and high frequency ranges are automatically boosted with the electric field strength of a received broadcast wave such as an FM broadcast wave.
The principle, nature and utility of the invention will become more apparent from the following detailed description when read in conjunction with the accompanying drawings.