I drew the circuit according to the schematic diagram and simulated it, but the output amplitude of rf+ and rf- is only more than 100 vpp. According to the article, this circuit could have output two opposite-phase sine waves with an amplitude of more than 200 vpp, I don’t know where is the problem. The inverter in the schematic is a CD74AC04M96, but there is none in the multisim, so I used a 4069 instead of the CD74AC04M96. Hope someone can help me see what's wrong, I really need your help
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