Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1975-06-30
1977-05-03
Heyman, John S.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307221D, 307279, 307DIG3, H03K 520, G11C 1928, H03K 518, H03K 3353
Patent
active
040216829
ABSTRACT:
The invention comprises circuitry for detecting relatively small amounts of charge emitted from a CCD register. The circuit acts as a differential amplifier, differentiating between charge levels corresponding to logical zeros and logical ones and generates corresponding system level logic signals. A reference charge is developed by a self-tracking reference charge injector. Both the reference charge and the charge packet to be sensed are coupled to the differential amplifier via buffering diode-coupled transistors. The circuit provides for a REFRESH mode of operation, but may be modified to also allow for READ, WRITE or PARTIAL-WRITE modes of operation.
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Suzuki et al., "A Static RAM with Normally-Off-Type Schottky Barrier FETs;" Dig. of Technical Papers of the 1973 IEEE Int'l Solid-State Circuits Conference; pp. 36-37 and 196; 2/14/1973.
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Gaensslen, "FET Diode Stored Charge Memory Cell;" IBM Tech. Discl. Bull.; vol. 11, No. 8, pp. 997-998; 1/1969.
Furman; "Sense Latch Circuit For Memory Cells;" IBM Tech. Discl. Bull.; vol. 16, No. 9, pp. 2792-2793; 2/1974.
Elmer Ben R.
Tchon Wallace E.
Anagnos Larry N.
Heyman John S.
Holloway, Jr. William W.
Honeywell Information Systems Inc.
Prasinos Nicholas
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