Method and apparatus for compensating thermal time constants in an electronic amplifier
US5483199A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Oct 21, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/302
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for maintaining stability while substantially compensating an output signal of a high gain, wide band amplifier having an undesirable signal dependent offset voltage, generated by signal dependent self heating of circuit components. A thermal offset voltage generator producing a signal dependent thermally generated offset voltage similar to that of the wide band amplifier is provided. The input of the thermal offset voltage generator is coupled an output of the wide band amplifier. The output of the thermal offset voltage generator is amplified and low pass filtered to provide a filtered compensating signal. The filtered compensating signal is injected into the wide band amplifier so as to substantially compensate an output signal of the wide band amplifier for the signal dependent thermally generated offset voltage of the wide band amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.