Fast high precision discrete-time analog finite impulse response filter
US5563819A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1994 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Dec 21, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H15/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high precision fast finite impulse response (FIR) filter which periodically samples an analog input signal and holds a sequentially-replaced number of the resulting discrete-time analog values in fixed storage cells while each value is being multiplied by a number of digital weights. The discrete-time analog values are not passed through delay devices and therefore do not degrade. The weights are stored in a memory or shift register and supplied to the multipliers in a repeating sequence. A predetermined number of the weights are set to zero to increase the setup time of the analog multipliers thereby increasing the precision without slowing the clocking frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.