High-speed ring oscillator suitable for triple modular redundancy anti-SET reinforcement technology

Abstract

The invention discloses a high-speed ring oscillator suitable for a triple modular redundancy anti-SET reinforcement technology. An SET reinforcement differential voltage-controlled oscillator based on a capacitive coupling phase synchronization modular redundancy technology is composed of three delay rings (namely, a first delay ring, a second delay ring and a third delay ring), three coupling capacitors (namely, a first coupling capacitor C1, a second coupling capacitor C2 and a third coupling capacitor C3), and a voting capacitor (a first voting circuit), wherein the first delay ring, the second delay ring and the third delay ring form a third loop; phase synchronization of three loops is realized through the coupling capacitors C1, C2 and C3; input of the three loops is completely same; and the control voltage ends Vcont of the delay rings in the three loops are each connected with control voltage. The invention provides the high-speed ring oscillator having high anti-SET capability and high VCO oscillation frequency.

Description

technical field [0001] The present invention relates to the field of radiation-resistant integrated circuits, and more specifically relates to a high-speed ring voltage-controlled oscillator (Voltage-Controlled -Oscillator, VCO). Background technique [0002] Chips working in a radiation environment, bombarded by high-energy particles will ionize "electron-holes" at the nodes of the chip circuit, resulting in instantaneous fluctuations in node voltage or current, resulting in wrong output of the circuit and SET effect . Studies have shown that integrated circuits are susceptible to various failures caused by SET. [0003] Ring VCO is mainly used in circuits such as frequency multiplication, frequency synthesis and clock generation. When the VCO in the stable working state of the clock system is bombarded by high-energy particles, it may cause phase and frequency deviations in its output, and even stop the oscillation. [0004] The technology associated with the present i...

AI Technical Summary

Problems solved by technology

For the triple-mode redundancy technology that introduces the voting circuit into the delay ring, the structure of the voter is different from that of the delay unit, which increases the delay of the ring oscillator and limits the oscillation frequency of the VCO.

Images