Method for controlling bias in an active grid array
US6583672B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2001 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Jun 5, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/1935
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a bias tracking network that manipulates the DC value of the control voltage applied to the active devices in each quasi-optic cell within an array of cells. The purpose of this network is to compensate for variations in the main DC bias supply voltage provided to each cell. In one embodiment, the bias tracking network includes a set of resistive voltage dividers at the boundary of each cell, together with resistors inserted within the conductors that carry a reference voltage from which the control voltage for each cell is derived. This impedance network introduced at each cell boundary causes the control voltage to “track” the variation in the voltage of the return lead (i.e., the “ground lead”) at each cell in the array, in order to maintain a consistent (or desired) control voltage distribution to each cell in the array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.