Radiation hardened D-type flip flop

Details Radiation hardened D-type flip flop Radiation hardened D-type flip flop

2008-03-27

2010-06-29

Nguyen, Hai L (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

C327S202000, C327S211000

Reexamination Certificate

active

07746139

ABSTRACT:
A programmable phase frequency divider for space applications is implemented in CMOS technology, and includes a number of radiation hardened D-type flip flops. The radiation hardened D-type flip flop circuits are designed to keep running properly at GHz frequencies in the presence of single event upset (SEU) hits. The novel D-type flip flop circuits each have two pairs of complementary inputs and outputs and each consists of a master latch and a slave latch connected in tandem. The master and slave latches each consist of two latch half circuits having dual complementary inputs and outputs that are mutually interconnected in a dual interlocked cell (DICE) configuration, with the result that the D-type flip flop is immune to an SEU affecting at most one of the flip flop's four dual complementary data inputs.

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