Monolithic vector modulator/complex weight using all-pass network
US4806888A · kind A · utility
19Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1986 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Apr 14, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/245
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A complex weighting device contains parallel all-pass networks selectively feeding a pair of differential amplifiers, so as to produce a set of mutually orthogonal vector outputs. These outputs are coupled to an attenuator network comprised of dual gate field effect transistors for controllably attenuating the vector outputs of the differential amplifiers. The attenuated vectors are selectively combined to realize a prescribed degree of phase shift from 0.degree. to 360.degree. through the complex weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.