Wide-band phase shifter
US4951000A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Jun 7, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/20
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A wide-band phase shifter contains a first (.phi..sub.1) and a second (.phi..sub.2) parallel branch receiving the same input signal (e) and presenting at their output a first (s.sub.1) and a second (s.sub.2) output signal which are shifted with respect to each other by a given angle. The first branch includes a first phase shift module (.phi..sub.1) and the second branch includes a second phase shift module (.phi..sub.2). A first (V.sub..epsilon.1) and a second (V.sub..epsilon.2) control signal are processed by a negative feedback loop having a phase-sensitive detector (10) which receives the output signals (s.sub.1, s.sub.2). A control circuit (CC) receives a control signal (.epsilon.) supplied by the detector (10) and produces the control signals (V.sub..epsilon.1, V.sub..epsilon.2). These signals are generated for producing the oppositely directed phase corrections in the two phase shift modules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.