Low-cost, capacitive-coupled level shifter scalable for high-voltage applications
US9473116B1 · kind B1 · utility
Inventor
Key dates
| Filing date | May 6, 2015 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | May 6, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/356104
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A level shifter for level-shifting a digital input signal referenced to an input ground potential to a digital output signal referenced to an output ground potential, comprising: a capacitor; a driver circuit, including an input node coupled to the digital input signal, and an output node coupled to a first terminal of the capacitor; a receiver circuit, including a first input node coupled to a second terminal of the capacitor, and an output node coupled to the digital output signal; and a latching feedback circuit, including a first input node coupled to the output node of the receiver circuit, and an output node coupled to the second terminal of the capacitor to latch a toggled signal. An optional resistor can be inserted to increase the output resistance of the latching feedback circuit to be substantially larger than the output resistance of the driver circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.