Two-transistor pixel array

摘要

A two-transistor (2T) pixel comprises a chemically-sensitive transistor (ChemFET) and a selection device which is a non-chemically sensitive transistor. A plurality of the 2T pixels may form an array, having a number of rows and a number of columns. The ChemFET can be configured in a source follower or common source readout mode. Both the ChemFET and the non-chemically sensitive transistor can be NMOS or PMOS device.

主权项

1. A device comprising:
a plurality of pairs of lines; an array of pixels coupled to the plurality of pairs of lines, a given pixel in the array coupled to a first line and a second line of a given pair of lines, the given pixel comprising:
a chemically-sensitive field-effect transistor (chemFET) including a first terminal directly connected to the first line and directly connected to another chemically-sensitive field-effect transistor not in the given pixel, a second terminal, and a floating gate coupled to a passivation layer; anda switch connected between the second terminal of the chemFET and the second line.