Signal transition detection circuit and method of the same
US8767900B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2012 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Apr 24, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/24
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A signal transition detection circuit is provided. The signal transition detection circuit comprises a counter module, a DAC, a comparator and a digital sampling module. The counter module generates a digital step signal. The DAC converts the digital step signal into an analog input signal and transmits it to an under-test circuit such that the under-test circuit generates an output signal transiting from a first stable level to a second stable level, wherein a transition section is located between the first and the second stable level. The comparator receives and compares the output signal with a default value to generate a normalized output signal. The digital sampling module samples the normalized output signal to retrieve impulses such that when the number of the impulses is accumulated to be larger than a reference value, a corresponding step of the digital step signal is determined to be a transition point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.