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HMC980 and op amp

I am using HMC980 ABC(active bias controller) to bias some RF amplifiers. The Igg needed for the amplifier is in the range of 20mA. 

I have read that  other forum that  using op amp ( AD8027 0r AD8655) together with the HMC980 will do the job, 

Can I request for some schematic on how should the HMC980 to be connected to the op amp.