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Unformatted text preview: Connect it as shown here: Now when you operate the op-amp, you should see a much smaller signal amplitude at the - input, corresponding to a larger open-loop gain (same output swing for a smaller input swing). the signal swing at the - input will probably be too small for you to actually calculate a gain - just verifying that gain is improved is good enough. Note: the values in the 30k / 20k voltage divider were chosen to set the bias rail for the cascoding devices so that all devices were in the active region. For your device parameters, it may be necessary to adjust the voltage somewhat, You can always probe the DC bias levels to establish that all devices are in the active region. 30k 20k...
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- Spring '01
- Integrated Circuit