Integrated circuit with improved on-chip power supply control

Details Integrated circuit with improved on-chip power supply control Integrated circuit with improved on-chip power supply control

1990-04-27

1991-11-05

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072968, 36518909, 340663, 340636, 323303, H02J 700, G05F 156, G05F 508, H03K 3027

Patent

active

050633040

ABSTRACT:
An on-chip power supply regulation system for a VLSI circuit such as a dynamic RAM is disclosed. The system includes a high power supply voltage detection circuit and a power supply clamp circuit, where a clamped voltage generated by the clamp circuit biases the functional circuitry when the high power supply voltage detection circuit detects an overvoltage conditions. The bias voltage applied to the functional circuitry in the normal operating condition can be a regulated voltage generated from the power supply voltage. Further included in the disclosed circuit is a burn-in voltage generation circuit and a burn-in voltage detection circuit, which can apply an accelerated voltage which depends upon the applied power supply voltage, when the power supply voltage is higher than during normal operation but lower than in the overvoltage condition enabling the clamp operation. A multiplexer connects the regulated voltage, the clamped voltage, or the accelerated voltage, to the circuit depending upon the level of the external power supply voltage. In this way, the offset between the accelerated voltage and the external power supply voltage can be optimized independently from the power supply voltage at which the accelerated voltage is enabled.

REFERENCES:
patent: 4670861 (1987-02-01), Shu et al.
patent: 4679172 (1987-07-01), Kirsch et al.
patent: 4701884 (1987-10-01), Aoki et al.
patent: 4709202 (1987-11-01), Koenck et al.
patent: 4716307 (1987-12-01), Aoyama
patent: 4926069 (1990-05-01), Pattantyus

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