A　Capacitive　Feedback　Programmable　Gain　Instrumentation　Amplifier　(CFPGA)　with　input　impedance　boosting　technique　is　proposed.　Compared　with　traditional　methods,　the　proposed　negative　capacitance　programmable　circuit　can　achieve　higher　input　impedance　without　injecting　current　into　human　biopotential　electrodes.　Simulation　results　using　TSMC＇s　180　nm　CMOS　technology　show　that　the　proposed　input　impedance　boosting　technique　can　achieve　an　input　impedance　higher　than　1G.　In　addition,　CFPGA　can　achieve　1-128　times　of　7bit　gain　adjustable.　The　entire　CFPGA　achieves　an　input-equivalent　noise　density　equal　to　29　nV/√Hz　at　a　supply　voltage　of　1.8V.　©　2022　IEEE.