Low-distortion transformer-coupled circuit
US4614914A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1985 |
| Grant date | Sep 30, 1986 |
| Priority date | — |
| Expiry date | Apr 12, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/32
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low-distortion transformer-coupled circuit. An amplifier is constructed to have a negative output impedance equal to the resistance of the primary winding of a coupling transformer to which the amplifier is connected thereby cancelling the distortion component produced by the transformer distortion current flowing through the primary winding resistance. The input to the amplifier is thus coupled to the secondary winding of the transformer. A low-frequency feedback circuit is provided between the amplifier output and a non-inverting input thereof. Means is provided for adjusting the negative output impedance of the amplifier to match circuit parameters. Alternatively, the coupling transformer employs two matched primary windings and one secondary winding, and the amplifier is constructed to provide a signal to each primary winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.