Gain bandwidth programmable amplifier in multifunctional bioelectricity collection analog front end

The present invention belongs to the technical field of amplifiers, specifically relates to a gain bandwidth programmable amplifier in a multifunctional bioelectricity collection analog front end. The present invention consists of 2 transconductance amplifiers, 4 fixed value capacitors, 4 gain selection capacitor arrays, 2 bandwidth selection capacitor arrays and 8 PMOS tubes, is characterized by configurable gain, bandwidth configurable, micro power consumption, low equivalent input offset voltage, etc., and can be applied to a wearable health supervision system. By adoption of the multifunctional bioelectricity signal collection analog front end of the present invention, conditioning amplification of brain electricity, electrocardio, electromyographic signals can be accomplished.