×

Large scale integrated circuit for low voltage operation

  • US 5,297,097 A
  • Filed: 06/14/1989
  • Issued: 03/22/1994
  • Est. Priority Date: 06/17/1988
  • Status: Expired due to Term
First Claim
Patent Images

1. A semiconductor device comprising:

  • a semiconductor chip;

    circuit blocks formed on the semiconductor chip, selectively supplied by an internal power supply voltage or plural internal power supply voltages;

    a reference voltage generator formed on the semiconductor chip, for outputting a reference voltage comprising a supply voltage reference level for operation of a one of the circuit blocks;

    voltage converter means formed on the semiconductor chip for selectively converting an external power supply voltage to the internal power supply voltage or to one of the plural internal power supply voltages by using said reference voltage as the reference level; and

    an input/output buffer circuit formed on the semiconductor chip;

    wherein the voltage converter means includes an amplifier means for selectively generating the internal power supply voltage or the plural internal power supply voltages according to the reference voltage, and the voltage converter means includes switching means for selectively connecting the external power supply voltage to the circuit blocks when the external power supply voltage is smaller than the reference voltage.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×