Auto-refresh control circuit for semiconductor device

Details Auto-refresh control circuit for semiconductor device Auto-refresh control circuit for semiconductor device

1997-10-31

1999-05-18

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327172, H03K3/02

Patent

active

059053925

ABSTRACT:
An auto-refresh control circuit for a semiconductor device includes a burn-in signal generator detecting a burn-in test state and generating a burn-in signal and a synchronous buffer receiving a clock signal and an external signal and generating an asynchronous signal and a synchronous signal corresponding to the external signal, the synchronous buffer synchronizing the asynchronous signal to the clock signal. A decoder, coupled to the synchronous buffer, receives control signals and the synchronous signal synchronized to the clock signal from the synchronous buffer and outputs a refresh signal. A refresh control signal generator, coupled to the burn-in signal generator, synchronous buffer, and the decoder, receives the refresh signal, the burn-in signal, and the asynchronous signal and generates an auto-refresh control signal.

REFERENCES:
patent: 5475646 (1995-12-01), Ogihara

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