Current mode output stage circuit with open loop DC offset reduction
US6965256B2 · kind B2 · utility
1Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 28, 2004 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | May 28, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/262
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An output stage circuit for a current mode device provides open loop reduction or cancellation of DC offset in differential output signals. Differential input signals are received and sourcing current mirrors provide mirrors of the differential input signals to output nodes. Sinking current mirrors also provide mirrors of opposite polarity of the differential input signals to the output nodes corresponding to the opposing sourcing current mirrors. The summing of the mirror currents at the output nodes substantially reduces or eliminates the DC offset components present in the input signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.