Help with homework problems

haikuman · Sep 29, 2011

Please help me with these problems I have no idea how to do them.

Four op-amp circuit problems: 1) op-amp with R and RL in a current-source setup labeled IL, 2) op-amp with 2k, 18k, 3k resistors and 3V source, 3) two cascaded op-amps with 2k, 6k, 24k, 8k, 2k resistors and 2 sin 3t V source, 4) op-amp with 8k, 6k, 12k resistors and 4V source.

Zryn · Sep 29, 2011

For Ideal Op-Amps, you should know the two golden rules governing the + and - terminals, one relates to the currents and one relates to the voltages. Do you know them?

1) What are the characteristics of an Ideal Current Source?

2) This basic problem shows you how to analyse an Inverting Op-Amp. You can treat it as a circuit and use all the tricks you have up your sleeve, specifically KCL at the node between the 2kR, 18kR and inverting input, and then Ohms Law at the output.

Don't try 3) and 4) until you can complete 1) and 2).

NascentOxygen · Sep 30, 2011

haikuman said:

Please help me with these problems I have no idea how to do them.

Just checking: are you studying an electronics course?

Help with homework problems

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