Amplitude and phase transfer linearization method and apparatus for a wideband amplifier
US6580319B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2001 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3276
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a transfer linearization (TL) circuit one or more biased nonlinear elements form a nonlinear attenuator and a biased network to allow adjustment of diodes to linearize the overall transfer of the TL circuit and an amplifier being linearized. The transfer linearization circuit reduces distortion encountered in a broadband RF amplifier. The circuit compensates for attenuation of amplified broadband signals in CATV systems. The transfer linearization circuit provides low insertion loss and requires very low power consumption. Nearly constant impedance and constant insertion loss is provided across a wide frequency range and reduces both in-band and out-of-band third order distortions. The TL circuit exhibits instantaneous amplitude and phase transfer correction. No tuned frequency selective components are required so that adjustments are relatively straightforward.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.