Apparently the internal components are "complicated." Looks like a gaggle of transistors, resistors and diodes, with a single capacitor. I'm disappointed we didn't go further on this. This could be interesting to learn from. I'll probably google it later, kinda busy right now, gotta prepare for the podcast recording I'll be doing at 1pm.
About op amps: you have two resistors and two inputs, the inverting and non-inverting. The usual configuration is in the first picture, where R1 is voltage in, and R2 is the feedback resistor. The ratio between these two resistors is important to calculate "gainz".
The open loop voltage gain is the gain with out any resistance from input to feedback.
Ideal op amp has infinite input resistance (infinite resistance between two input leads), and a minimum resistance between the voltage supply and the output. below: the equivalent circuit of an op amp, where the voltage dependent voltage supply depends on the voltage difference between the two input nodes.
So we did some examples with nodal analysis.
MOVING ON
The bandwidth of the 741 is 1.5MHz. That's pretty wide I think. Good stuff. There's a lot of interesting stuff in terms of op amp characteristics. Like Power Supply rejection ratio--it's pretty bad. Lots of noise on the output.
Hooray for modern Op amps (1988 is modern). So OP27 is more modern. It does things:
Low noise. High speed. Low drift (which indicates temperature), and high open loop gain: 1.8 million Ohms
So the lab today, we'll be using the inverting voltage amplifier. With the OP27.
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