Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1994-12-16
1997-09-16
Cunningham, Terry
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327 77, 327 78, 327534, 327537, H03K 522
Patent
active
056684878
ABSTRACT:
A substrate potential detection circuit includes a substrate potential detection unit including a first transistor having a gate and a source connected respectively to a ground line and a reference voltage line, a second transistor having a gate receiving a substrate potential and a drain connected to the ground, and a third transistor having a source connected to the drain of the first transistor and a gate and a drain connected in common to the source of the second transistor to form a detection output node; and a buffer circuit having a drive transistor and a current source, a gate and a source of the drive transistor being connected respectively to the detection output node and the reference voltage line and outputting a substrate detection voltage.
REFERENCES:
patent: 4337378 (1982-06-01), Davis
patent: 4794278 (1988-12-01), Vajdic
patent: 4961167 (1990-10-01), Kumanoya et al.
patent: 5113088 (1992-05-01), Yamamoto et al.
patent: 5243228 (1993-09-01), Maruyama et al.
patent: 5270584 (1993-12-01), Koshikawa et al.
patent: 5341035 (1994-08-01), Shibayama et al.
Cunningham Terry
NEC Corporation
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