Level shift circuit with gain enhancement
US5148118A · kind A · utility
8Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Mar 22, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/50
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A new level shifting circuit is presented which does not restrict the upper limit of the common-mode input range of an operational amplifier. This is important particularly in operational amplifiers designated to operate with low power supply voltages. Significant parameters. of the operational amplifier, such as the gain and the slew rate, can be controlled without adversely affecting the common-mode input voltage range. The level shifting stage operates nondifferentially to avoid stability problems found in differential stages. A further improvement is accomplished using current balancing to achieve gain enhancement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.