Output circuit for CMOS integrated circuit with pre-buffer to reduce distortion of output signal
US4890016A · kind A · utility
27Cited by
8References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 1988 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | May 24, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00392
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output circuit includes a plurality of output buffer circuits and a plurality of pre-buffer circuits connected to drive the output buffer circuits. Some of the pre-buffer circuits are each constituted by P- and N-channel MOS transistors having channel widths or channel lengths which are large enough to drive the output buffer circuits, and the remaining pre-buffer circuits are each constituted by P- and N-channel MOS transistors whose channel widths and channel lengths are so determined as to set the current driving ability thereof sufficiently smaller than that of the corresponding output buffer circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.