Low power consumption AC load switches
US9673811B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2013 |
| Grant date | Jun 6, 2017 |
| Priority date | — |
| Expiry date | Dec 4, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0072
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for ensuring ultra-low power relay switching to control an AC load and extend a battery's lifetime. A control circuit may be designed to work where power is provided at very low duty cycles in that the on-time of applied voltage is quite short compared to its off-time. During the on-time, power such as that from a battery may be consumed to drive the circuit but overall such consumption of power is almost miniscule, for instance, a few microamperes or less from a three volt battery. An input FET may drive a pair of switching FETs that provide pulses to a transformer which provides a ramp of voltage that remains above zero volts to a pair of AC switch FETs. An output of the AC switch may go to operate relays of a wire saver for operating one or more thermostats.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.