Systems and methods for analog finite impulse response filters
US10903820B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2020 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Apr 2, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2210/021
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Systems and methods for analog finite impulse response (FIR) filters are provided. In certain embodiments, a receiver includes a cascade of a mixer, an analog FIR filter, and an analog-to-digital converter (ADC). By including the analog FIR filter along the signal path between the mixer and the ADC, design constraints of the ADC are relaxed. For example, the ADC can operate with relaxed specifications with respect to resolution and/or dynamic range when the analog FIR filter is included. The analog FIR filter can include a controllable transconductance circuit that delivers an integration current to a capacitor over an integration period, with the analog FIR filter's coefficients used to change the transconductance setting of the controllable transconductance circuit to different values over the integration period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.