You can learn from our mistakes.
Voltage Follower
The Basics
The voltage follower, like the comparator, requires no components other than the op-amp itself. The voltage follower is typically used as a buffer; whatever circuit is connected to the output will have essentially no effect on the circuit attached to the input. Either of the inputs is connected directly to the output. The [...]
Comparator
The Basics
The comparator, unlike the previous amplifiers I’ve covered, requires no components other than the op-amp itself. The inverting and non-inverting inputs are used to compare two voltages. The higher of the two inputs will drive the output to the corresponding supply rail. For example, if the voltage applied to the non-inverting input is higher [...]
Summing Amplifier
Note: For this and future circuits topics I’ll be using LTSpice, which is provided free from Linear Technology here. I also recommend viewing my LTSpice Tutorial. Also, unless otherwise stated, any future discussions involving op-amps will assume an ideal op-amp. This will assume that the voltages at both inputs are at the same voltage [...]
Difference Amplifier
Note: For this and future circuits topics I’ll be using LTSpice, which is provided free from Linear Technology here. I also recommend viewing my LTSpice Tutorial. Also, unless otherwise stated, any future discussions involving op-amps will assume an ideal op-amp. This will assume that the voltages at both inputs are at the same voltage [...]
Non-inverting Amplifier
Note: For this and future circuits topics I’ll be using LTSpice, which is provided free from Linear Technology here. I also recommend viewing my LTSpice Tutorial. Also, unless otherwise stated, any future discussions involving op-amps will assume an ideal op-amp. This will assume that the voltages at both inputs are at the same voltage [...]
Inverting Amplifier
Note: For this and future circuits topics I’ll be using LTSpice, which is provided free from Linear Technology here. I also recommend viewing my LTSpice Tutorial. Also, unless otherwise stated, any future discussions involving op-amps will assume an ideal op-amp. This will assume that the voltages at both inputs are at the same voltage [...]