pz5921087
Member level 1
Hi, I am designing a very simple two stage differential amplifier that posted on razavi's book, but the load is a 8 ohm resistor parallel with a 500fF cap, but when i connect it with the output, the AC response result become totally different!! It seems current flows in second stage flows into the resistor, and the DC level at output also changes a lot!! How can I solve this problem? Do I need a output stage for my circuit? Can anybody give me some suggestions plz? Thanks very much!!!!!!
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