Ring oscillator and semiconductor device
US9160315B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2013 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Dec 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C29/12015
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
There are provided a ring oscillator having a plurality of delay circuits to be ring-connected. At least one of the plurality of delay circuits has a delay element formed in a layout region including the same layout shape as the layout shape of an SRAM cell, and a path circuit connected in parallel to the delay element. The delay element outputs an output signal to a delay circuit in the next stage within the plurality of delay circuits in response to one of rise transition and fall transition of a signal input to the input terminal of the delay element from a delay circuit in the previous stage within the plurality of delay circuits. The path circuit outputs an output signal to the delay circuit in the next stage in response to the transition other than the one transition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.