| 摘要 |
A readout circuit (1) has an x-row by y-column array of readout unit cells (10) each having an input for coupling to an output of a radiation detector (16) and an output that is switchably coupled to one of y column output lines (21). Each unit cell includes a driver transistor (12) having a gate terminal coupled to the detector, a source terminal coupled to a source voltage, and a drain terminal switchably coupled to a drain voltage through one of y loads, such as one of y current sources (18). The drain terminal is switchably coupled to the one of y current sources through an output multiplexer switch (20). The current source is a common current source for all of the x unit cells coupled to a same one of the y column output lines. The unit cell further includes a capacitance coupled between the gate and drain terminals, and a reset switch also coupled between the gate and drain terminals.
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