Patent ID: 7179690
Filing Date: 2007-02-20
Classification: H03K

Abstract:
1. A method of manufacturing a triple redundant latch with improved soft error rate comprising: a) fabricating a first transfer gate, the first transfer gate having an input, a first control input, a second control input, and an output; b) fabricating a second transfer gate, the second transfer gate having an input, a first control input, a second control input, and an output; c) fabricating a third transfer gate, the transfer third gate having an input, a first control input, a second control input and an output; d) fabricating a first latch, the first latch having an input and an output; e) fabricating a second latch, the second latch having an input and an output; f) fabricating a third latch, the third latch having an input and an ouput; g) fabricating a first voting structure, the first voting structure having a first input, a second input, a third input, a fourth input, and an output; h) fabricating a second voting structure, the second voting structure having a first input, a second input, a third input, a fourth input, and an output; and i) fabricating a third voting structure, the third voting structure having a first input, a second input, a third input, a fourth input, and an output; j) wherein an input of the triple redundant latch is formed by connecting together the input of the first transfer gate, the input of the second transfer gate, and the input of the third transfer gate; k) wherein an output of the triple redundant latch comprises the output of the third voting structure; l) wherein a first control input of the triple redundant latch is formed by connecting together the first control input of the first transfer gate, the first control input of the second transfer gate, the first control input of the third transfer gate, the third input of the first voting structure, the third input of the second voting structure, and the third input of the third voting structure; m) wherein a second control input of the triple redundant latch is formed by connecting together the second control input of the first transfer gate, the second control input of the second transfer gate, the second control input of the third transfer gate, the fourth input of the first voting structure, the fourth input of the second voting structure, and the fourth input of the third voting structure; n) wherein the output of the first transfer gate is connected to the input of the first latch; o) wherein the output of the second transfer gate is connected to the input of the second latch; p) wherein the output of the third transfer gate is connected to the input of the third latch; q) wherein the output of the first latch is connected to the second input of the third voting structure and the first input of the second voting structure; r) wherein the output of the second latch is connected to the first input of the first voting structure and the first input of the third voting structure; and s) wherein the output of the third latch is connected to the second input of the first voting structure and the second input of the second voting structure.