Low pass/high pass filter phase shifter
US4963773A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 18, 1988 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Jul 18, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/20
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A compact low pass/high pass filter phase shifter including a semiconductor switch having a control electrode and first and second load electrodes; a first inductance connected in series with one load electrode and second inductance connected in series with the other load electrode; a third inductance connected in parallel with one load electrode to ground and a fourth inductance connected in parallel with the other load electrode to ground; a capacitance connected in series between the control electrode and ground; and means for applying a control signal to the control electrode for switching the semiconductor switch between a first state in which it operates as a low pass filter and a second state in which it operates as a high pass filter to introduce a phase shift in a propagated signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.