3 ms·
The second circuit is actually really boring once you recognize the parts. From left-to-right, it's: 1. A voltage to current converter 2. An optocoupler 3. A
by klodolph 4y ago
The second circuit is actually really boring once you recognize the parts. From left-to-right, it's:
1. A voltage to current converter
2. An optocoupler
3. A buffer
4. An amplifier
Stage #1 drives the optocoupler, since current is what gets turned into light inside the optocoupler.
The output is high-impedance, so you add a buffer, which is #3.
The output has a low-level, so you amplify it, which is #4.
If you work through a chapter of an EE book that explains op amps, and you're not afraid of algebra, you'll find this stuff becomes approachable very quickly. Designing circuits like this is a bit more challenging, but reading them is very approachable.