Data exchange using fan unit signal lines
US11474578B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jun 30, 2020 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Apr 21, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K7/20727
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Data exchange using fan unit signal lines is disclosed, including receiving a pulse width modulated (PWM) signal on a PWM signal line of a fan unit; detecting that a frequency of the PWM signal is outside a frequency range used to control a fan speed of a fan in the fan unit; selecting a data output based on the frequency of the PWM signal; and sending the data output on a tachometric signal line of the fan unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.