On the Feasibility of Slow-Wave-Structure Clocking of High-Frequency Charge-Coupled Devices.

摘要

Coupling an electromagnetic wave through a slow-wave structure is proposed as a method of clocking a charge-coupled device (CCD),in order to obtain high charge-transfer efficiencies at high frequencies. The conditions necessary for synchronizing the velocity of the wave with the drift velocity of charge carriers in the CCD channel are derived. Meander-line clocking for operation of silicon CCDs in this traveling-wave mode appears to be feasible with present technology for clock frequencies in the range of 1to 250GHz. At synchronism,diffusion-limited inefficiency in charge transfer is eliminated,allowing operation at high frequencies where surface-state-limited inefficiency is negligible so that transfer efficiencies approaching 100% should be achievable. (Author)