Ultraminiature 180 degree phase shifter
US5045731A · kind A · utility
4Cited by
8References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1989 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Oct 27, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A 180 degree ultraminiature phase shifter. Only two switching devices and very few passive circuit elements are required, thus allowing an extremely small and low loss device to be fabricated. When power is applied to switching devices, a low pass pi section low pass filter is realized which provides +90 degrees of phase shift. When power is absent from the switching devices, a T section high pass filter is realized which provides -90 degrees of phase shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.