a source - follower - per - detector unit cell , a two dimensional array of same and a method of operating the two dimensional array . each unit cell is constructed with but three transistors and is coupled to an associated radiation detector for receiving an output signal therefrom . a method includes a first step of reading out a first row of unit cells by asserting a first row enable signal for causing each of the unit cells of the row to impress an electrical signal onto an associated output signal line . the electrical signal has a magnitude that is a function of the associated detector output signal . the method includes an additional step of simultaneously resetting another row of unit cells each of which has a reset input coupled to and responsive to the assertion of the first row enable signal line .