Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1993-11-08
1995-01-31
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
36518907, 365196, 365210, 327108, 327541, 327530, 327546, G11C 700, H03K 301
Patent
active
053861582
ABSTRACT:
A sensing circuit for a floating gate memory device is disclosed. The sensing circuit has a first voltage amplifier which generates a first output voltage, and a current amplifier which receives the first output voltage and generates a first output current in response thereto. The first voltage amplifier has a control transistor which generates a first output voltage in response to the memory device being in one state and a second output voltage in response to the memory device being in another state. The circuit also comprises a dummy cell, a second voltage amplifier connected thereto for generating a second output voltage. A second current amplifier receives the second output voltage and generates a second output current in response thereto. A comparator receives the first and second output currents, compares them, and generates an output indicative of the state of the memory device.
REFERENCES:
patent: 4223394 (1960-09-01), Pathak et al.
patent: 5055720 (1991-10-01), Tiede
patent: 5111432 (1992-05-01), Miyaoka
patent: 5121007 (1992-06-01), Aizaki
Callahan Timothy P.
Phan Trong
Silicon Storage Technology, Inc.
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