Transistor comparator circuit having split collector feedback hysteresis
US4717839A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1987 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Jan 2, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/02337
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A comparator circuit responsive to an applied input signal passing through a threshold voltage for providing output signal transitions which comprises circuitry for generating a controllable threshold voltage, comparing circuitry including a first multi-collector transistor which is switched on and off as the input signal passes through the threshold voltage level and which has a collector coupled to the threshold voltage circuitry for sourcing current thereto when the transistor is turned on and the threshold voltage producing circuitry being responsive to the current sourced from the transistor for increasing the magnitude of the threshold voltage, the threshold voltage being supplied to the comparing circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.