Patent ID: 7746139

Claim:
A radiation hardened D-type flip flop comprising: a master latch having a clock input, first and second data inputs, first and second complementary data inputs, first and second data outputs, and first and second complementary data outputs; and a slave latch having first and second data inputs, first and second complementary data inputs, first and second data outputs, and first and second complementary data outputs, wherein the first data output and the first complementary data output of the master latch are connected respectively to the first data input and the first complementary data input of the slave latch, wherein the second data output and the second complementary data output of the master latch are connected respectively to the second data input and the second complementary data input of the slave latch, wherein the master latch comprises two identical master latch half circuits, the master latch half circuits having respective dual complementary inputs and outputs through which the master latch half circuits are mutually interconnected, and wherein the slave latch comprises two identical slave latch half circuits, different from the master latch half circuits, the slave latch half circuits having respective dual complementary inputs and outputs through which the slave latch half circuits are mutually interconnected.