bobchentan
Junior Member level 3
For a simple common-source differential amplifier with a resistor loading, if we change the biasing current, how is the gain, bandwidth and gain-bandwidth product changing?
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naalald said:Hi,
I agree with abcyin.
But, batistuta, if RL>>ro in the case of the gain maybe you're right and for the bandwidth, it changes but the gainbandwidth product will not be constant if you consider so gm×ro/(Co×ro) ≈ gm/Co ≈ √Id/Co
batistuta said:naalald said:Hi,
I agree with abcyin.
But, batistuta, if RL>>ro in the case of the gain maybe you're right and for the bandwidth, it changes but the gainbandwidth product will not be constant if you consider so gm×ro/(Co×ro) ≈ gm/Co ≈ √Id/Co
thanks, naalald. i just give my comprehence, but to gain bandwidth product i think it is a constant, maybe you are right, i will check it .:|