Voltage detection circuit and a method of detecting voltage changes
US10298144B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2016 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Jan 13, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A power conversion system and a method for voltage change detection, specifically, relates to a detection circuit implemented in the AC-DC power converter, detect the voltage change. The AC input voltage is rectified to convert into a DC input voltage transmitted to a detection unit generating a detection voltage signal at different logical states corresponding to the input voltage changes. A charge current source unit is used for charging the capacitor when the detection voltage signal is in a second state and a discharge current source unit is used for discharging the capacitor when the detection voltage signal is in a first state. A primary comparator compares the voltage changes of the capacitor in the alternating charge and discharge processes with a critical zero potential and outputs a detection signal identifying the changing trend of the input voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.