Enhanced linearity, low switching perturbation resistor string matrices
US6507272B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2001 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Jul 26, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/765
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Enhanced linearity, low switching perturbation resistor string matrices. The resistor strings are arranged in an array of a plurality of rows of resistive elements and electrically arranged with rows equally spaced above and below the physical centerline of the array being coupled together in an opposite sense. Preferably also physically adjacent rows are equally spaced from the center of the electrical order of rows. This connection prevents accumulation of errors due to vertical and horizontal resistance gradients over the array. Also node selection by controlling node select transistors coupled to column select lines to select one node in each row, and also controlling row select transistors to select the row of the desired node minimizes settling time after a tap change by inducing equal and opposite voltage changes at points close together along the resistor string, whether in the array of the present invention or in the snake configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.