University of Minnesota

William Moy

Hyung-Il Kim

Hao Lo

A coupled ring oscillator circuit includes a first ring oscillator, a second ring oscillator and a coupling circuit. The first ring oscillator includes a series of delay stages, each delay stage including an inverter gate. The second ring oscillator includes a series of delay stages, each delay stage including an inverter gate. The coupling circuit includes a coupling cell having a first modified tri-state inverter connected in parallel with one of the inverter gates of the first ring oscillator, and a second modified tri-state inverter connected in parallel with one of the inverter gates of the second ring oscillator.

Logic based ring oscillator coupling circuit

A fully connected ring oscillator circuit includes a plurality of first ring oscillator loops, a plurality of second ring oscillator loops, a plurality of ring oscillators and a plurality of coupled ring oscillators. Each first ring oscillator loop extends along a first axis. Each second ring oscillator loop extends along a second axis that is transverse to the first axis and intersects each of the first ring oscillator loops. Each ring oscillator includes one of the first ring oscillator loops connected to one of the second ring oscillator loops. Each coupled ring oscillator includes two of the ring oscillators that are connected to each other through a programmable weighted coupling block.

Growing community of inventors

Minneapolis, MN, United States of America

William Moy