Semiconductor IC device having a voltage conversion circuit whic

Details Semiconductor IC device having a voltage conversion circuit whic Semiconductor IC device having a voltage conversion circuit whic

1994-05-16

1995-06-20

Lee, Benny

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36518909, 365228, 365229, 3652257, 365201, 307 23, 307 64, 307 65, 307 80, 327543, 327544, G11C 11407

Patent

active

054266165

ABSTRACT:
A voltage conversion circuit of the present invention is equipped with means for generating a first voltage stabilized with respect to ground potential of a semiconductor integrated circuit device including the circuit, means for generating second voltage stabilized with respect to an external supply voltage of the semiconductor integrated circuit device, and selection means for selecting either the first voltage or the second voltage. The first voltage age, stabilized with respect to the ground potential, is selected and used as the voltage at the time of normal operation, and the second voltage, stabilized with respect to the external supply voltage, is selected and used at the time of aging test. In this case, means for trimming the first voltage and/or the second voltage is, preferably, provided to raise the voltage accuracy.

REFERENCES:
patent: 4446534 (1984-05-01), Smith
patent: 4916389 (1990-04-01), Hori et al.
patent: 4994688 (1991-02-01), Horiguchi et al.
patent: 5086238 (1992-02-01), Watanabe
patent: 5179539 (1993-01-01), Horiguchi et al.
patent: 5254880 (1993-10-01), Horiguchi et al.
John Markus, "Modern Electronic Circuits Reference Manual", 1980, p. 808-McGraw-Hill.

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