Internal circuit schematic diagram of M5227P

M5227P is a single-channel five-segment balanced dedicated integrated circuit produced by Mitsubishi Company. It has
the characteristics of small size, good stability and good consistency. Its output voltage is as high as 9.5V, and the distortion is small. When the input is 5v, the distortion at 1kHz is only
0.002%, and the noise is low. In the range of 10Hz~30kH, the noise voltage is only 6pLV. This circuit can use either single power supply
or dual power supply. The main electrical properties are shown in Table 4-5. Figure 4-40 is the schematic diagram of the
    internal circuit of M5227P . It can be seen from the figure that the circuit contains 6 operational amplifiers, of which A6 serves as a public amplifier, and the remaining Ai ~ As form an analog inductor with external capacitors and built-in resistors. Each analog inductor The inductor is connected in series with the capacitance of each segment and resonates at the center frequency of each frequency band.