On the Feasibility of Slow-Wave-Structure Clocking of High-Frequency Charge-Coupled Devices.
BATTELLE COLUMBUS LABS OHIO
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TOR DEVICES, ELECTRICAL PROPERTIES, CARRIERSSEMICONDUCTORS, SPACE CHARGE, TRANSFER FUNCTIONS, ELECTROMAGNETIC RADIATION, DESIGN, SILICONCHARGE COUPLED DEVICESCoupling 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 1 to 250 GHz. 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
- Electrical and Electronic Equipment
- Solid State Physics