Internal circuit principle of STK6327A

STK6327A is a seven-segment integrated equalizer circuit manufactured by Japan's Sanyo Company using thick film integration technology. It
contains 8 integrated operational amplifier circuits. Except for 1 used as a public amplifier, the remaining 7 can form a seven-segment analog inductor. External
capacitors form a seven-segment balancing circuit. ST K6327A can be powered by a single power supply or dual power supply. Its electrical parameters
are shown in Table 4-6. The internal circuit is shown in Figure 4-43, and the application circuit is shown in Figure 4-43.