Flexible on-chip power and clock
Modern integrated circuits have an increasing need for various levels of both supply voltage (V) and operating frequency (f) available at fine spatial and temporal granularity. This work introduces a solution that provides a number and quality of locally distributed V/f domains through FOPAC. Opportunistically sharing design resources and features between multi-phase voltage regulators (MPVRs) and resonant rotary clocks (ReRoCs) enabling i) the scalability to hundreds of domains, ii) fast switching times for both voltage and frequency, leading to temporal flexibility, and iii) locally distributed designs, leading to spatial flexibility.
1. A flexible on-chip power and clock (FOPAC) architecture comprising:
multi-phase voltage regulators (MVPRs) that share a fly capacitor with a resonant rotary clock (ReRoC),
wherein the ReRoC provides multiple clock phases for an interleaved operation; and
wherein comparators provide that high gain are driven by a higher frequency clock signal (CLKHf) and comparators that provide nominal gain by a lower frequency clock signal (CLKLf).
2. The flexible on-chip power and clock (FOPAC) architecture of claim 1 , wherein the ReRoC includes IC interconnects for transmission lines.
3. The flexible on-chip power and clock (FOPAC) architecture of claim 2 , further comprising inverter pairs that are uniformly distributed along the transmission lines.
4. The flexible on-chip power and clock (FOPAC) architecture of claim 3 , wherein the inverter pairs are uniformly distributed along the transmission lines in anti-parallel fashion.
5. The flexible on-chip power and clock (FOPAC) architecture of claim 4 , wherein a traveling wave along the transmission line of the ReRoC provides multiple phases with a duty cycle of 50%.
6. The flexible on-chip power and clock (FOPAC) architecture of claim 5 , wherein the phase delay of the ReRoC is evenly distributed in the direction of wave propagation.
7. The flexible on-chip power and clock (FOPAC) architecture of claim 1 , wherein the two different frequencies of the clock signals are provided from the ReRoC.
8. The flexible on-chip power and clock (FOPAC) architecture of claim 1 , wherein the comparators are a doubletail latch-type for speed and low kickback noise.
9. The flexible on-chip power and clock (FOPAC) architecture of claim 1 , wherein the MVPR is an integrated switched capacitor voltage regulator (SCVR).
10. The flexible on-chip power and clock (FOPAC) architecture of claim 9 , wherein the SCVR comprises at least one fly capacitor that generates a DC output voltage.
11. The flexible on-chip power and clock (FOPAC) architecture of claim 9 , wherein the SCVR has non-overlapping signals that operate at the MHz frequency range.
12. The flexible on-chip power and clock (FOPAC) architecture of claim 1 , wherein the ReRoC comprises a frequency divider with a main loop of MOSABs and a sub-loop of MISABs.