Complementary Schottky transistor logic circuit
US4433258A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Mar 18, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/082
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A logic circuit is provided which includes a plurality of basic circuits each of which has a pnp (or npn) transistor as a constant current load and at least one npn (or pnp) transistor each as a driver with a clamping Schottky diode. The base of the driver transistor is used as an input terminal and the collector thereof is used as an output terminal, for each basic circuit and the output terminal of the preceding stage basic circuit is coupled directly to the input terminal of the subsequent stage basic circuit. In order to prevent current hogging the load current supplied from the preceding stage constant current load transistor is set to operate the subsequent stage driver transistor in a saturation made when the subsequent stage driver transistor is in the ON state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.