Electrical pulse counters – pulse dividers – or shift registers: c – Charge transfer device – Particular input or output means
Patent
1992-01-21
1994-02-15
Sikes, William L.
Electrical pulse counters, pulse dividers, or shift registers: c
Charge transfer device
Particular input or output means
377 58, 377 63, 257239, H01L21976, G11C 1928
Patent
active
052873935
ABSTRACT:
A charge coupled device transfers a charge packet to a floating diffusion region for producing voltage variation therein, and the voltage variation is relayed to an output terminal by means of a driving unit implemented by a plurality of source follower circuits coupled in cascade, wherein each of the second to final source follower circuits is implemented by a series combination of an enhancement type driving transistor and an enhancement type load transistor, and the enhancement type load transistor changes the channel conductance thereof complementary to the enhancement type driving transistor under the control of a control unit so as to improve the dynamic range of the output signal thereof without sacrifice of the sensitivity of the floating diffusion region.
REFERENCES:
patent: 4603426 (1986-07-01), Sauer
patent: 4700085 (1987-10-01), Miwada
patent: 5029190 (1991-02-01), Narabu et al.
patent: 5033068 (1991-07-01), Imai
Duong Tai V.
NEC Corporation
Sikes William L.
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