Soft-error rate improvement in a latch using low-pass filtering

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Particular stable state circuit

Reexamination Certificate

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Details

C327S211000

Reexamination Certificate

active

11152274

ABSTRACT:
In a preferred embodiment, the invention provides a circuit and method for reducing soft error events in latches. A low-pass filter is placed between the output of a forward inverter and the inputs of a feedback keeper. The first and second outputs of the low-pass filter are connected to first and second inputs respectively of the feedback keeper. The only type of diffusion connected to the first output of the low-pass filter is a P-type diffusion. The only type of diffusion connected to the second output of the low-pass filter is an N-type diffusion. The feedback keeper is connected to an input of the forward inverter.

REFERENCES:
patent: 5760618 (1998-06-01), Deliyannides et al.
patent: 6026011 (2000-02-01), Zhang
patent: 6384620 (2002-05-01), Yamada et al.
patent: 6472919 (2002-10-01), Burr
patent: 6573774 (2003-06-01), Gardner
patent: 7068088 (2006-06-01), Petersen
patent: 7132871 (2006-11-01), Arima et al.
patent: 2003/0102897 (2003-06-01), Hannum et al.

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