Unbalanced/balanced conversion differential amplifier
US8476981B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2011 |
| Grant date | Jul 2, 2013 |
| Priority date | — |
| Expiry date | Dec 9, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45488
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A differential amplifier including an input of a balanced type relative to a reference potential; a balanced output; first and second bipolar transistors mounted in common emitter configuration, emitters of the first and second transistors linked by two feedback impedances in series; and a perfect current generator, wherein an impedance Zg at the terminals of the current generator is connected between a common point of the two feedback impedances and the reference potential, the input is connected to a base of the first transistor, a base of the second transistor is linked to the reference potential to form, with a base of the first transistor, the unbalanced input, the balanced output is produced by collectors of the first and second transistors through an impedance matching stage of the output, a correction feedback impedance Zcorr, wherein Zcorr=2·Zg, connects the collector of the second transistor and the base of the first transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.