DOIM140: A 140-spin, all-to-all connected, Oscillator Ising Machine IC in 180nm CMOS

Gagan Deep Goru, Shreesha Sreedhara, Venkata Pavan Sumanth Sikhakollu, Thomas Jagielski, Rajit Manohar, and Jaijeet Roychowdhury

We present a 140-spin Oscillator Ising Machine IC in 180nm CMOS, featuring all-to-all connectivity and 10 bits of coupling resolution. The design introduces a novel pausable oscillator and a limiting technique that enhance solution quality. The chip is demonstrated to solve random Ising problems as well as MU-MIMO detection problems, achieving high-quality solutions. It occupies an area of 42mm2 and consumes a peak power of 228mW.
 
  
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