AC coupling circuits including resistive feedback and related methods and devices
US7778097B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2008 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Dec 13, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45522
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An integrated circuit device may include an amplifier having an amplifier input configured to receive an input signal with the amplifier being configured to provide an amplifier output signal at an amplifier output responsive to the input signal received at the amplifier input. A capacitor may be coupled to the amplifier output, and a buffer may be coupled to the capacitor so that the capacitor is coupled in series between the amplifier output and an input of the buffer with an output of the buffer being coupled to a buffered signal terminal. A variable resistive feedback circuit may be coupled between the input and output of the buffer with the variable resistive feed back circuit providing a variable resistance between the input and output of the buffer. A feedback resistance controller may be coupled to the variable resistive feedback circuit with the feedback resistance controller being configured to select a first resistance for the variable resistive feedback circuit for a first frequency of the input signal and to select a second resistance for the variable resistive feedback circuit for a second frequency of the input signal different than the first frequency with the first…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.