Radiation hardened by design digital input/output circuits and related methods

摘要

Embodiments of radiation hardened by design digital input/output circuits are described herein. Other examples and related methods are also disclosed herein.

主权项

1. An integrated circuit with radiation hardened by design protection, comprising:
input/output circuitry within the integrated circuit, the input/output circuitry comprising: a first pad of one or more pads; and a first pad circuitry of the first pad comprising a voltage level shifter; wherein: the first pad circuitry is coupled to the first pad; the first pad circuitry is triple-redundant; and a core circuit, wherein the first pad circuitry is located between the first pad and the core circuit; a first input path coupled between the first pad and the first pad circuitry to route first, second, and third copies of a data input from the first pad to the first pad circuitry; wherein: the first pad circuitry comprises: a first input driving circuit coupled between the first input path and the core circuit to transmit to the core circuit the first copy of the data input; a second input driving circuit coupled between the first input path and the core circuit to transmit to the core circuit the second copy of the data input; and a third input driving circuit coupled between the first input path and the core circuit to transmit to the core circuit the third copy of the data input; the first, second, and third input driving circuits are triple-redundant to each other; and the first, second, and third copies of the data input are triple-redundant to each other; and wherein the core circuit comprises: an input correction mechanism configured to determine a corrupt state of one of the first, second, or third copies of the data input via majority voting between the first, second, and third data inputs.