Micropower neural amplifier with adaptive input-referred noise

A micropower neural amplifier with adaptive power biasing for use in multi-electrode arrays comprising:

• a low noise gain stage, said low noise gain stage implemented using amplifier and pseudoresistor elements;
• and
• a band pass filter stage to shape a pass band of the amplifier.

A micropower neural amplifier with adaptive power biasing for use in multi-electrode arrays comprising:

• a low noise gain stage, said low noise gain stage implemented using an amplifier and pseudoresistor elements, said pseudoresistor element's noise being in the low frequencies, thereby allowing said low frequency noise to be filtered prior to pass band and does not appear in a frequency of interest;
• and
• a band pass filter stage to shape a pass band of the amplifier.

A micropower neural amplifier with adaptive power biasing for use in multi-electrode arrays comprising:

• a low noise gain stage, said low noise gain stage implemented using an amplifier and pseudoresistor elements, said amplifier implemented using a modified version of a standard folded-cascode topology, the modification involving biasing an operational transconductance amplifier such that only currents in transistors of a folded branch are only a fraction of the current in the input differential pair transistors;
• and
• a band pass filter stage to shape a pass band of the amplifier.

A method of forming a micropower neural amplifier with adaptive power biasing for use in multi-electrode arrays comprising:

• implementing a low noise gain stage using an amplifier and pseudoresistor elements, said pseudoresistor element's noise being in the low frequencies, thereby allowing said low frequency noise to be filtered prior to pass band and does not appear in a frequency of interest;
• and
• implementing a band pass filter stage to shape a pass band of the amplifier.

A method of performing operations of a micropower neural amplifier with adaptive power biasing for use in multi-electrode arrays comprising:

• utilizing an amplifier and pseudoresistor elements in a low noise gain stage, said pseudoresistor element's noise being in the low frequencies, thereby allowing said low frequency noise to be filtered prior to pass band and does not appear in a frequency of interest;
• and
• shaping a pass band of the amplifier in a band pass filter stage.