Crosstalk generation and detection for digital isolators
US10805123B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2018 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Jul 20, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/49175
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of detecting crosstalk for a digital isolator having first and second channels including two die with channels including a transmit side, receive side, with ≥1 die including a capacitive barrier for each channel. A first clock signal at a first frequency in a first pulse pattern and a second clock signal at a second frequency in a second pulse pattern are configured, wherein the pulse patterns have a phase difference. The transmit side of the channels each encode their received clock pulse pattern, then modulate with a carrier frequency to provide a fc1 and a fc2 signal, respectively. The receive side of the channels demodulate received signals during a rising or falling edge of their clock signal to generate a delayed received version of the first and second clock pulse pattern. Missing pulses are identified by comparing the delayed received clock pulse patterns to their clock pulse patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.