R.sin conversion circuit that implements multiplication of analog input and digital data

It is a circuit that multiplies analog input and digital data to perform R (data
/263) operation. The digital data value is O~2550. Prepare the ROM
data corresponding to the sine function in advance . Because AD7s23 is a positive logic input, so ainoo=O, port=ooH} sin900 =1, D=FFH (255/256≈l)o Taking port 1 as a level, calculate sinoo~90 ports, then multiply by 265, and replace it with = decimal point The following are rounded off) Save Qian P- ROM o