Static information storage and retrieval – Read/write circuit – Differential sensing
Patent
1998-03-02
2000-12-26
Nelms, David
Static information storage and retrieval
Read/write circuit
Differential sensing
36518521, 36518909, G11C 702
Patent
active
061669784
ABSTRACT:
A semiconductor device includes a differential amplifier, a current mirror circuit and a control current supply circuit. The amplifier has a first and a second transistor forming an input differential pair, the first transistor having a first gate and a first and a second impurity diffusion layer, the second transistor having a second gate and a third and a fourth impurity diffusion layer. The current mirror circuit has a third and a fourth transistor, the third transistor having a third gate and a fifth and a sixth impurity diffusion layer, the fourth transistor having a fourth gate and a seventh and an eighth impurity diffusion layer. The control current supply circuit has a non-volatile memory transistor having a control gate, a charge accumulating layer and a ninth and a tenth impurity diffusion layer. The first and the fifth impurity diffusion layers and the third and the fourth gates are connected to each other via a first wiring layer. The third and the seventh impurity diffusion layers are connected to each other via a second wiring layer. The sixth and the eighth impurity diffusion layers are connected to a first constant voltage supply via a third wiring layer. And, the second and the fourth impurity diffusion layers are connected to a second constant voltage supply via at least a fourth wiring layer, the first control current supply circuit and a fifth wiring layer.
REFERENCES:
patent: 4916665 (1990-04-01), Atsumi et al.
patent: 5598122 (1997-01-01), McClure
patent: 5617355 (1997-04-01), Kohno
patent: 5912838 (1999-06-01), Chevallier
Le Thong
Nelms David
Nippon Steel Corporation
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