Differential amplifier with proxy load for control of output common mode range
US5770968A · kind A · utility
9Cited by
10References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1994 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Dec 30, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/372
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An innovative differential amplifier circuit, which can control the midpoint potential of a load which does not itself have any midpoint connection. This is achieved by using a proxy load element in parallel with the primary load. The proxy load is of much higher impedance value than the primary load, and does have a center tap. The potential of the center tap of the mirrored load is used for a feedback connection to a control loop which regulates the output to both the primary load and the proxy load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.