Semiconductor integrated circuit having a voltage stepdown mecha

Details Semiconductor integrated circuit having a voltage stepdown mecha Semiconductor integrated circuit having a voltage stepdown mecha

1992-09-11

1994-09-13

Pascal, Robert J.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072963, 3072965, 3072966, H03K 301

Patent

active

053471709

ABSTRACT:
The external power supply voltage applied to an external power supply terminal is supplied to an internal stepdown circuit and a switch circuit. The value of the external power supply voltage is detected by an external voltage detecting circuit, and if the value is greater than a predetermined value, the internal stepdown circuit operates, the external power supply voltage is stepped down by the internal stepdown circuit and supplied to an internal circuit as an internal power supply voltage. Alternatively, if the value of the external power supply voltage is smaller than the predetermined value, the internal stepdown circuit does not operate, and instead the switch circuit operates and the external power supply voltage is supplied via the switch circuit to the internal circuit as the internal power supply voltage.

REFERENCES:
patent: 4961008 (1990-10-01), Fujiwara et al.
patent: 5184031 (1993-02-01), Hayakawa

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