Bi-directional voltage converter of smart card and smart card including the same
US11599760B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2021 |
| Grant date | Mar 7, 2023 |
| Priority date | — |
| Expiry date | May 25, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/161
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A bi-directional voltage converter of a smart card includes switching elements connected between an input node and an output node and a start-up transistors whose channel width over channel length is smaller than a channel width over channel length of the switching element. The bi-directional voltage converter stores a driving voltage applied to an output node in a storage capacitor during a booting operation and provides the voltage stored in the storage capacitor to an input node. The bi-directional voltage converter may boost another driving voltage at the input node step-wisely and may perform bi-directional voltage converting with reduced occupied area and high efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.