Doorbell chime bypass circuit
US11645894B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2021 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Sep 2, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0009
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A doorbell chime bypass circuit includes a first node, a second node, and a bi-directional FET switch in series with the first node and the second current node. The bi-directional FET switch includes a first FET and a second FET in series, and is configured to cease conducting current between the first and second nodes when gate voltages of the first and second FETs are below a cut-off threshold. The bypass circuit further includes a sensing circuit configured to determine a level of current flowing through the bi-directional FET switch, and a switch controller configured to set the gate voltages of the first and second FETs to a level below the cut-off threshold when the sensing circuit senses that the level of current meets a doorbell press current threshold, causing the bi-directional FET switch to cease conducting current between the first and second nodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.