Double-sided logic input differential switch
US4714841A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1985 |
| Grant date | Dec 22, 1987 |
| Priority date | — |
| Expiry date | Jun 25, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/086
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A logic circuit adapted for fabrication as an integrated circuit is formed having a differential amplifier operating with a constant current source and an appropriate voltage source, and having output transistors to provide the necessary output voltages, does not require a reference voltage input to the differential amplifier, thus, reference voltage transistors are not required. The two binary input signals are selected to have the same amplitude difference between the high and low levels thereof and one of the two input signals is shifted relative to the other one by the amount substantially equal to 1/2 the selected amplitude difference, and the output signals are similarly level shifted. Using this basic logic circuit as a building block other, more complex, logic circuits can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.