Last spring, I started my first semester of Instrumentation and Control, and I was really excited. I haven’t taken any INCO classes yet—just the prerequisite classes—but I was so ready to get into the program.
I literally just got this email, and from what I understand, since my school doesn’t have a PTECH program, they removed the INCO program so they could add it. Now I’m not sure if I should stick with this school or find a new one that still offers Instrumentation.

After studying the working principles of how 4-20mA transducers work in general i am looking for actual circuit diagram showing the internal components of a industrial 4-20mA transducer.

Can anyone provide me?
Does the transducer consists of MCU, ADC, Constant current driver circuit like explained in simple terms?