Reconfigurable radio frequency (RF) bandstop/intermediate frequency (IF) bandpass filter
US9991875B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2016 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | Nov 15, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A reconfigurable filter circuit has a first path including a transimpedance amplifier (TIA). The transimpedance amplifier has an input that receives an input current and an output that outputs a voltage. The reconfigurable filter circuit also includes a switchable feedback path. The switchable feedback path includes a first low-pass filter coupled to an output of the TIA. The switchable feedback path also includes a first switch to couple the feedback path to provide a feedback current to the first path resulting in a bandpass response in the output voltage when the switch is closed and a low-pass response in the output voltage when the switch is open.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.