Semiconductor device with power supply mode-change controller fo

Details Semiconductor device with power supply mode-change controller fo Semiconductor device with power supply mode-change controller fo

1989-01-23

1991-06-11

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072966, 307491, 323311, 324 73AT, G05F 316

Patent

active

050234765

ABSTRACT:
An integrated semiconductor device is disclosed which has a highly-integrated circuit formed on a substrate. A constant voltage generator is connected to the integrated circuit, for receiving an externally-supplied d.c. power supply voltage to produce a regulated d.c. voltage, the potential level of which is lower than the external power supply voltage and remains substantially constant irrespective of the external power supply voltage. A mode-change controller is connected in parallel with the voltage generator, for supplying the output d.c. voltage of the voltage generator to the integrated circuit as an internal power supply voltage in a normal operation mode. When the device is subjected to an accelerated test using an increased power supply voltage, a switching transistor is rendered conductive under the control of a control circuit, thereby allowing the external power supply voltage to be directly applied to the integrated circuit.

REFERENCES:
patent: 3639779 (1972-02-01), Garrigus
patent: 4683382 (1987-07-01), Sakurai et al.
patent: 4691123 (1987-09-01), Hashimoto
patent: 4780854 (1988-10-01), Watanabe et al.
patent: 4782355 (1988-11-01), Sakai et al.

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