Comparator circuit with precision hysteresis and high input impedance
US5313114A · kind A · utility
15Cited by
7References
20Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 31, 1991 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Dec 31, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/02337
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The amplitude of the hysteresis of the circuit is determined principally by the intensity of the current produced by a generator by means of a "band gap" reference voltage, an internal resistance of the circuit, and the resistances connected to the emitters of the input-stage transistors, enabling a high degree of precision to be achieved. The inputs of the circuit are defined by the bases of the input-stage transistors and therefore have high impedance. The preferred application is for forming interface circuits for sensors to be fitted in motor vehicles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.