Detector of differential threshold voltage
US7227399B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2004 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Oct 3, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00323
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A differential threshold voltage level detection circuit receives a differential voltage pair as an input, applying each component of the differential pair to an individual voltage shifting circuit. Each voltage shifting circuit is configured with a regulated current producing a shifted and a non-shifted version in-phase. For a shifted set of output differential voltages, the shift magnitude is proportional to the current entering a shifting circuit and is configured to be less than a peak-to-peak magnitude of the differential voltage to be detected. A current mirror within the detector contains a current reference configured to produce a current to be passed through a voltage generator. The current magnitude is sufficient to generate a regulated voltage output to the two current regulating devices that supply the voltage shifting circuits. An overlap detector receiving both differential voltage pairs produces a signal indicating an input is at a detection threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.