Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1994-08-05
1996-07-23
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327543, 327541, 327323, G05F 110, G05F 302
Patent
active
055393535
ABSTRACT:
A differential amplifier and an NMOS transistor are provided corresponding to each load circuit. A positive input and a negative input of the differential amplifier are coupled to a first ground interconnection and a second ground interconnection, respectively. When the selected load circuit operates, the potential received by this load circuit rises by interconnection resistances of the first ground interconnection. However, the potential received by the de-selected load circuit is reduced due to the operation of its corresponding differential amplifier and transistor. As a result, a rise in the potential of the de-selected circuit caused by the operation of the selected circuit will be suppressed. The differential amplifier and transistor corresponding to the selected load circuit also operate to reduce the potential of the selected circuit, thereby to suppress the rise in such potential.
REFERENCES:
patent: 3975648 (1976-08-01), Tobey, Jr. et al.
patent: 4484331 (1984-11-01), Miller
patent: 4677369 (1987-06-01), Bowers et al.
patent: 4820937 (1989-04-01), Hsieh
Nikkei Micro Device,"Power Supply Voltage-Down Circuit," Feb. 1990, pp. 115-122.
Akamatsu Hiroshi
Kajimoto Takeshi
Callahan Timothy P.
Kim Jung Ho
Mitsubishi Denki & Kabushiki Kaisha
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