Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1994-04-05
1995-12-05
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327538, 327537, 36518909, G05F 110
Patent
active
054732778
ABSTRACT:
A constant voltage generator circuit comprises adjusting means for making fine adjustment of each back-gate voltage of transistors on the basis of external control signals, and a transistor circuit for outputting a constant voltage adjusted on the basis of the back-gate voltage. A constant voltage generator circuit comprises adjusting means for making fine adjustment of each back-gate voltage of transistors on the basis of external control signals; and a transistor circuit for outputting a constant voltage adjusted on the basis of the back-gate voltages, the transistor circuit including a plurality of N transistors with their respective gates and sources connected together, and a load element for dividing the power source voltage with a plurality of N transistors. Adjusting means comprises a plurality of N-1 switching circuits for supplying bias voltages individually to the back-gate of the first through (N-1)th transistors in the transistor circuit on the basis of the external control signal, and a switching element for stopping the operation of the Nth transistor in the transistor circuit on the basis of the external control signal. A semiconductor memory comprises memory means for storing information; and constant voltage generating means for supplying voltage to memory means, the constant voltage generating means including adjusting means for making fine adjustment of each back-gate voltage of a plurality of transistor on the basis of external control signals, and a transistor circuit for outputting the constant voltage adjusted on the basis of the back-gate voltages.
REFERENCES:
patent: 4899309 (1990-02-01), Kitazawa et al.
patent: 5031148 (1991-07-01), Kitazawa et al.
patent: 5099146 (1992-03-01), Miki et al.
Callahan Timothy P.
Fujitsu Limited
Kim Jung Ho
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