Systems and methods for hysteresis control in a comparator
US7532041B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2006 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | Feb 9, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/3565
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Various systems and methods for comparing signals are disclosed herein. For example, some embodiments of the present invention provide comparator circuits with programmable hysteresis. Such circuits include a comparator input circuit that receives two inputs to be compared. The comparator input circuit provides a first differential current output based at least in part on a difference between the first voltage input and the second voltage input. The aforementioned circuits further include a hysteresis control circuit that is operable to receive a single programmable voltage input, and to provide a second differential current output based at least in part on the comparator output and the single programmable voltage input. An output circuit is also included that sums the first differential current and the second differential current, and provides a comparator output based at least in part on the sum of the first differential current and the second differential current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.