Self-correcting amplifier system
US8710847B2 · kind B2 · utility
11Cited by
77References
14Claims
0Family size
Inventors
Key dates
| Filing date | Oct 28, 2011 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Oct 8, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45138
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
DC offsets introduced in battery testing equipment are automatically compensated for using complementary current-mode servo feedback. An op amp receives and amplifies a response signal, while also introducing internal errors manifested in the amplified response signal. A correction circuitry coupled to receive the amplified response signal and comprising a balanced circuit with a positive input correction device and a negative input correction device to remove the DC bias. The correction circuitry further comprises an error sensing device to correct for the internal errors introduced by the op amp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.