Glitches due to soft errors can act as a severe deterrent to asynchronous circuit operations. To mitigate soft errors in quasi delay insensitive (QDI) asynchronous circuits, built-in soft error correction in NULL convention logic (NCL) has been introduced . However, this technique cannot detect errors during the NULL phase of NCL pipeline, and also cannot avoid error propagation into the pipeline after its detection. This project provides a modified approach to overcome these limitations with, on average, comparable power and latency costs. This work also analyzes the temperature variation effects on latency and power consumption of the proposed design. The modified NCL pipeline is implemented in IHP 90nm CMOS technology and analyzed under the worst-case operating conditions. It is found out that the proposed design works correctly for the entire operating range.
F. K. Lodhi, O. Hasan, S. R. Hasan and F. Awwad, “Modified Null Convention Logic Pipeline to Detect Soft Errors in Both Null and Data Phase, ” in IEEE International Midwest Symposium on Circuits and Systems (MWCAS 2012) ,IEEE Circuit and System Society (CAS), Boise, Iadho, USA, pp. 402 – 405.