Patent ID: 8698212
Filing Date: 2014-04-15
Classification: C12Q,G01N,Y10T

Abstract:
1. An apparatus comprising an array of sensors, a sensor in the array comprising: a chemically-sensitive field effect transistor (chemFET) having a first conduction terminal coupled to a first supply voltage conductor, a second conduction terminal, and a sensor surface; a first transistor having a first conduction terminal coupled to the second conduction terminal of the chemFET, a second conduction terminal coupled to a current source conductor, and a gate; a second transistor having a gate coupled to the second conduction terminal of the chemFET, a first conduction terminal directly coupled to a second supply voltage conductor, and a second conduction terminal; and a third transistor having a gate directly coupled to the gate of the first transistor, a first conduction terminal coupled to the second conduction terminal of the second transistor, and a second conduction terminal directly coupled to an output conductor.