Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1980-06-03
1982-05-25
Munson, Gene M.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307221D, 357 24, H03K 342, G11C 1928, H01L 2978
Patent
active
043318894
ABSTRACT:
In a charge transfer device imager, photodetector output current is accumulated and stored during an integration period in an analog potential well in the substrate surface potential adjacent the photodetector, the analog well being reset each time the detector changes the amount of stored charge by a preselected fraction of the storing well capacity, simultaneously incrementing a digital count. At the end of each integration period, both the contents of the analog well and the digital count are read into an output register. As a result, the length of the integration period may be significantly extended without regard to the charge storing capacity of the charge transfer device, thus improving the signal-to-noise ratio and the dynamic range of the imager. In the preferred embodiment, the amount of charge stored in the analog potential well is sensed by sensing the potential of the photodetector, where the photodetector comprises a diode diffusion in the substrate.
REFERENCES:
patent: 3414807 (1968-12-01), Evans
patent: 4092549 (1978-05-01), Prince
patent: 4145689 (1979-03-01), Butler et al.
patent: 4270060 (1981-05-01), Pines et al.
Hughes Aircraft Co.
MacAllister W. H.
Munson Gene M.
Wallace R. M.
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