Matched photonic detector-charge transfer reader assembly and image forming target using such an assembly

Claim 1

In a photon detector-charge transfer readout device assembly comprising at least one photon detector exposed to incident radiation and a readout device for reading a signal from this detector, transfer charges created in the readout device being of the same sign to those of the signal of the detector, detector and said readout device being connected together by way of a MOS field effect transister having a source, an auxiliary electrode, a control gate, a drain-forming electrode and a transfer gate, said MOS transistor being integrated with the readout device, the signals from the detector being transmitted to the readout device by sequential switching of the potentials of the electrodes of the transister, said auxiliary electrode being adjacent the source for accumulating thereunder in said substrate during operation a fixed reserve charge, and means for applying a steadily decreasing potential in time to this additional electrode during a switching cycle.