Filter circuits having transformers as filter elements
US4409569A · kind A · utility
6Cited by
0References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1981 |
| Grant date | Oct 11, 1983 |
| Priority date | — |
| Expiry date | Nov 2, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/1775
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Filter circuits of the type having inductance and capacitance elements, wherein the number of magnetic components is reduced by using two transformers to perform the functions of four individual inductors. Each transformer has one end of the primary winding connected to one end of the secondary winding, and a pi or T equivalent circuit in which one of the inductance values is equal in magnitude and opposite in sign to a corresponding equivalent circuit inductance value of the other transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.