Abstract:
A system for detecting radiation events, having: a test memory with memory blocks; a controller having controller memory; an integrated circuit (IC) array having IC chains, wherein each of the IC chains has a plurality of IC elements that is response to and generates a voltage when exposed to a radiation event; a dosimeter configured to record an accumulated amount of radiation exposure to the system, wherein the controller is configured to perform steps of: initializing the test memory, the IC array and the dosimeter; monitoring for an unexpected signal from an IC chain and for unexpected data in a memory block of the test memory; and identifying the radiation event upon one or more of receiving the unexpected signal and identifying unexpected data in a memory block of the test memory.
Abstract:
An integrated circuit protection device, including: groups of radiation detection elements distributed in a matrix array; logic gates combining outputs of the detection elements in rows and in columns, each output of a detection element being connected to a gate combining a row and to a gate combining a column; and a circuit for interpreting signals supplied by said logic gates and including an event counter and a delay element.
Abstract:
A fault-tolerant system including a calculation unit and an output synthesizer is provided. The calculation unit receives a first environmental parameter and input data, wherein the calculation unit further includes a first and a second calculation circuits. The first calculation circuit is arranged to perform a calculation on the input data in response to the first environmental parameter to generate a first calculation result. The second calculation circuit is different from the first calculation circuit, and arranged to perform the calculation on the input data in response to the first environmental parameter to generate a second calculation result. The output synthesizer selects a first and a second set of bits from the first and the second calculation result according to a control signal, and synthesizes the first set of bits and the second set of bits in sequence to generate an adjusted calculation result.
Abstract:
This disclosure relates generally to radiation hardened digital circuits. In one embodiment, a radiation hardened digital circuit includes a delay network and a first Muller C element. The delay network is configured to generate a first delayed clock signal from a global clock signal such that that the first delayed clock signal is delayed with respect to the global clock signal. The first Muller C element is configured to generate a first clock input signal and set the first clock input signal to one of a set of clock states in response to the first delayed clock signal and the global clock signal each being provided in a same one of the set of clock states and is configured to hold the first clock input signal otherwise. Thus, a radiation strike is prevented from causing a soft error in the first clock input signal.
Abstract:
A circuit includes a complimentary metal-oxide semiconductor (CMOS) storage element implemented within a p-type substrate and an n-well implemented within the p-type substrate that is independent of the storage element. The n-well and the storage element are separated by a minimum distance in which the p-type substrate includes no n-well.
Abstract:
In various embodiments, an integrated circuit layout is disclosed. In one embodiments, the integrated circuit layout comprises a first contact area from a first logic cell and a second contact area from a second logic cell. The second contact area comprises a non-zero, non-opposing effect with respect to the first contact area. The first contact area and the second contact area comprise a first distance. When the first distance is below a predetermined threshold the first logic cell and the second logic cell are placed along a first R-line of the circuit and a third contact area comprising an opposing effect with respect to the first contact area and the second contact area is placed between the first contact area and second contact area.
Abstract:
This invention comprises a layout method to effectively protect logic circuits against soft errors (non-destructive errors) and circuit cells, with layout, which are protected against soft errors. In particular, the method protects against cases where multiple nodes in circuit are affected by a single event. These events lead to multiple errors in the circuit, and while several methods exist to deal with single node errors, multiple node errors are very hard to deal with using any currently existing protection methods. The method is particularly useful for CMOS based logic circuits in modem technologies (.ltoreq.90 nm), where the occurrence of multiple node pulses becomes high (due to the high integration level). It uses a unique layout configuration, which makes the circuits protected against single event generated soft-errors.
Abstract:
This invention comprises a layout method to effectively protect logic circuits against soft errors (non-destructive errors) and circuit cells, with layout, which are protected against soft errors. In particular, the method protects against cases where multiple nodes in circuit are affected by a single event. These events lead to multiple errors in the circuit, and while several methods exist to deal with single node errors, multiple node errors are very hard to deal with using any currently existing protection methods. The method is particularly useful for CMOS based logic circuits in modem technologies (.ltoreq.90 nm), where the occurrence of multiple node pulses becomes high (due to the high integration level). It uses a unique layout configuration, which makes the circuits protected against single event generated soft-errors.
Abstract:
A latch circuit includes an input part receiving an external input signal; a plurality of CMOS inverter circuits divided into a first group that includes a first CMOS inverter circuit and a second CMOS inverter circuit outputting inverted data with respect to the input signal, and a second group that includes a third CMOS inverter circuit and a fourth CMOS inverter circuit outputting the same data as the input signal; and a feedback path through which the input signal is fed back to the input part via the plurality of CMOS inverter circuits, wherein a second-polarity drain belonging to one of the first CMOS inverter circuit and the second CMOS inverter circuit is arranged between a first-polarity drain belonging to the first CMOS inverter circuit and a first-polarity drain belonging to the second CMOS inverter circuit.
Abstract:
A system and method for radiation-tolerant level shifting are disclosed. In some embodiments, an integrated circuit may include a plurality of level shifters, where each of the plurality of level shifters configured receive a same logic level in a first voltage domain and to output candidate logic levels in a second voltage domain, and where at least one of the candidate logic levels subject to being different from another one of the candidate logic levels. The integrated circuit may also include a voting circuit coupled to the plurality of level shifters, where the voting circuit is configured to evaluate the candidate logic levels and output a selected logic level based, at least in part, upon the evaluation.