Charge-coupled device with diode cut-off input

Details Charge-coupled device with diode cut-off input Charge-coupled device with diode cut-off input

1987-03-31

1988-09-27

Munson, Gene M.

Electrical pulse counters, pulse dividers, or shift registers: c

Charge transfer device

Particular input or output means

357 24, G11C 1928, H01L 2978

Patent

active

047747196

ABSTRACT:
The invention relates to a CCD having a diode cut-off input, a reference voltage being applied to the input diode and the input signal being supplied to an input gate located in front of the first clock electrode. If the electrodes are composed of a transfer part and a storage part with an incorporated potential difference, it is possible that incomplete charge transport may occur from the input to the first clock electrode. In order to avoid this incomplete charge transport and/or to be able to enlarge the dynamic range of the input signal, a larger clock voltage, for example 10 V, is applied to the first clock electrode than to the following clock electrodes, which receive, for example, 5 V. In a preferred embodiment, the 5 V clock voltage can be supplied for this purpose by a boots-trap circuit ot the first clock electrode.

REFERENCES:
patent: 3925805 (1975-12-01), Erb
Wallinga "A Comparison of CCD Analog Input Circuit Characteristics", Int. Conf. Technology and Applications of Charge Coupled Devices, Edinburgh (9/74), pp. 13-21.
Beynon et al., Eds. Charge-Coupled Devices and Their Applications, McGraw-Hill, London (1980), pp. 187-189.

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