OPAMPs
Typical Values
| Typical Values | Ideal Values | |
|---|---|---|
| A (Open-loop gain) | \(10^5-10^8\; \Omega\) | \(\infty\) |
| Rin (Input Resistance) | \(10^5-10^{13}\; \Omega\) | \(\infty\) |
| Rout (Output Resistance) | \(10-100\; \Omega\) | \(0\) |
Example:
Find vo in the circuit.
Inverting Amplifier
Non-inverting Amplifier
Ex:
Vo=7V
Summing Amplifier
Ex:
Vo=-8V
io=-4.8mA
Difference Amplifier
Ex: Design an op amp circuit with inputs v 1 and v 2 such that Vo = 3V2 - 5V1
Cascaded OPAMPS
V0=3.5 V
Ex:
V1=7V
V2=3.1 V
Vo=? Vo=10V