Active chemically-sensitive sensors with in-sensor current sources
First Claim
Patent Images
1. A method of operating an apparatus comprising an array of chemically sensitive sensors comprising chemically-sensitive field effect transistors (chemFETs) and source follower amplifiers arranged in rows and columns, the method comprising:
- inducing a flow of current in the chemFETs in the sensors using a transistor coupled to the chemFET and biased in a current limiting mode;
amplifying a voltage on a conduction terminal of the chemFET using a source follower amplifier in the row of the sensors to produce a sensor output voltage; and
coupling the sensor output voltage to a column bus coupled to a column of sensors in the array.
0 Assignments
0 Petitions
Accused Products
Abstract
Methods and apparatus relating to FET arrays for monitoring chemical and/or biological reactions such as nucleic acid sequencing-by-synthesis reactions. Some methods provided herein relate to improving signal (and also signal to noise ratio) from released hydrogen ions during nucleic acid sequencing reactions.
-
Citations
9 Claims
-
1. A method of operating an apparatus comprising an array of chemically sensitive sensors comprising chemically-sensitive field effect transistors (chemFETs) and source follower amplifiers arranged in rows and columns, the method comprising:
-
inducing a flow of current in the chemFETs in the sensors using a transistor coupled to the chemFET and biased in a current limiting mode; amplifying a voltage on a conduction terminal of the chemFET using a source follower amplifier in the row of the sensors to produce a sensor output voltage; and coupling the sensor output voltage to a column bus coupled to a column of sensors in the array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification