Abstract: The present invention provides digital imaging architectures comprising detectors coupled to readout circuitry, wherein the readout circuitry functions in particular modes, the use of which can depend on characteristics of the input signals transferred to the readout circuitry from the detectors, or can depend on the characteristics of the output signal required from the readout circuitry. For example, when the input signal has a particular magnitude the readout circuitry can function in a first mode in which the input signal can be amplified to a measurable level, and when the input signal has another magnitude, the readout circuitry can function in an alternate mode in which the input signal can be read out with a different or no amplification. Multiple modes can be implemented to provide various levels of amplification to the input signal, for example, three or more modes of operation of the readout circuitry can be implemented. Furthermore, more than one mode can be used to read out the same input signal.

Abstract: This invention presents Vt-shift invariant integrated multiplexer and de-multiplexer circuits that can be fabricated with a-Si:H, poly-crystalline silicon, or organic/polymer TFTs. The de-multiplexer and multiplexer includes a plurality of TFTs which are connected in series, and a drive TFT. These circuits are used with active matrix displays to control the gate addressing, and with imaging arrays to multiplex the read-out data.