Ring oscillators for temperature detection in wideband supply noise environments
US10234336B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2015 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Mar 1, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0315
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature identification system may include temperature sensing circuitry and a temperature measurement module. The temperature sensing circuitry may include a ring oscillator that generates a ring oscillator output signal having a frequency that varies depending on an operating temperature on the ring oscillator. A frequency divider circuit may divide the frequency of the ring oscillator output signal such that two or more cycles of a noise component of supply voltage are averaged, which may reduce the impact that the noise has on the frequency of the ring oscillator output signal. In some embodiments, a regulator may supply a regulated voltage to the ring oscillator. The regulator may reduce the impact of the noise for low frequency components of the noise, while the frequency divider may reduce the impact for high frequency of the noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.