Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1975-12-15
1977-05-10
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307208, 307221C, 307251, 307311, 307DIG4, H03K 1710, H03K 1760, H03K 342, H03K 2312
Patent
active
040230481
ABSTRACT:
High density self-scanning photo-sensitive circuits employ a voltage transfer mode with charge amplification. The circuits include a field effect transistor and a capacitor coupled from the gate electrode of the transistor through a diode to the source electrode of the transistor. A photodiode is connected to the gate electrode of the transistor. Means are provided for precharging the capacitor to substantially the threshold voltage of the transistor while applying an additional constant voltage of predetermined magnitude to the gate electrode to operate the transistor in its linear region. An analog signal from the photo-diode is also applied to the gate electrode of the transistor which is amplified by the transistor with little or no threshold voltage loss. In a preferred array of these circuits, the photo-diodes or light sensitive devices are arranged linearly, in quantities of a thousand or more, and video signals from alternate devices are coupled to one or two common busses through individual gating transistors.
REFERENCES:
patent: 3932773 (1976-01-01), Luscher et al.
Lewis et al., "Two-Stage, Single-Phase Driver Circuit"; IBM Tech. Discl. Bull.; vol. 17, No. 10, p. 2837; 3/1975.
Anderson et al., "Decoding Scheme for MOS Random-Access Memories"; IBM Tech. Discl. Bull.; vol. 17, No. 10, pp. 2832-2833; 3/1975.
SIMI, "Field-Effect Transistor Drive Circuit"; IBM Tech. Discl. Bull.; vol. 17, No. 4, p. 1120; 7/1974.
Anagnos L. N.
Heyman John S.
International Business Machines - Corporation
Limanek Stephen J.
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