Process corner detection circuit based on self-timing oscillation ring
US10422830B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2014 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Jul 20, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0315
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process corner detection circuit based on a self-timing ring oscillator comprises a reset circuit (1), the self-timing oscillation ring (2), and a counting module (3). The self-timing ring oscillator (2) consists of m two-input Muller C-elements and inverters, and a two-input AND gate, m being a positive integer greater than or equal to 3. The circuit can be used for detecting a process corner of a fabricated integrated circuit chip, and reflecting the process corner of the chip according to the number of oscillations of the self-timing ring oscillator (2). The number of oscillations of the self-timing ring oscillator (2) in different process corners is acquired by Hspice simulation before the chip tape-out, and the process corner of the chip after the chip tape-out can be determined according to the actually measured number of oscillations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.