Hysteresis comparator circuit for operation with a low voltage power supply
US5563534A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1994 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | May 9, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/02337
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A hysteresis comparator circuit working with a low voltage supply and of a type which includes a composite structure incorporating first and second differential cells respectively comprised of an npn bipolar transistor pair with common emitters, on the one side, and a pair of pnp bipolar transistor pair with common emitters, on the other, such cells being coupled together through the bases of the respective transistors. The circuit includes at least one pair of variable current sources associated with each cell and tied operatively to the voltage value present on the comparator output; in addition, a voltage divider is connected between each interconnection of the bases of the transistors forming the cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.