Active biquad filter with oscillator circuit
US10608601B2 · kind B2 · utility
0Cited by
6References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 2017 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | Apr 14, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2210/04
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Certain aspects of the present disclosure are generally directed to a tunable active filter and a method of calibrating a tunable active filter. One example apparatus is a filter circuit that generally includes a resistor-capacitor (RC) topology tunable active filter comprising a first amplifier, a second amplifier, and a feedback path coupled between an input of the first amplifier and an output of the second amplifier. The filter circuit also includes a negative transconductance circuit coupled to a first node of the tunable active filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.