Ultrahigh accuracy digital programmable attenuator
US5408205A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1993 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Oct 26, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/001
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high accuracy programmable attenuator for accurately selecting and maintaining desired values of attenuation for a high frequency RF signal. The attenuator is comprised of a plurality of cells wherein each cell is comprised of an individual attenuator, a switch and a bias resistor. Each bias resistor is comprised of a plurality of individual resistors arranged in a binary sequence and wire bonds are used to short out undesired resistors for compensating for insertion loss and obtaining desired attenuation. The attenuators of the circuit are also arranged in a binary sequence so as to allow the user to select from a large variety of attenuations in small increments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.