Pillow school circuit-2

This circuit is taken from the pillow calibration circuit of Venus D2918 model. Compared with the pillow calibration circuit-1, it only has two more stages of amplification, V951 and V950. The reason is that the field sawtooth wave is not taken from the field deflection coil sampling resistor, but from the TDA8838 (46) Foot acquisition, because the amplitude is small, so two levels of amplification are added.