| US 7,592,866 B2 | ||
| Widebrand differential amplifier including single-ended amplifiers coupled to a four-port transformer | ||
| David E. Meharry, Lexington, Mass. (US) | ||
| Assigned to BAE Systems Information and Electronic Systems Integration Inc., Nashua, N.H. (US) | ||
| Filed on Feb. 20, 2007, as Appl. No. 11/708,992. | ||
| Claims priority of provisional application 60/774582, filed on Feb. 17, 2006. | ||
| Prior Publication US 2008/0218263 A1, Sep. 11, 2008 | ||
| Int. Cl. H03F 1/00 (2006.01) | ||
| U.S. Cl. 330—195 [330/165; 330/301] | 20 Claims |
| 1. A differential amplifier, comprising:
a first single-ended amplifier circuit;
a second single-ended amplifier circuit; and
a four-port transformer circuit having two input ports and two output ports, the two input ports being coupled to the first
and second single-ended amplifier circuits, respectively, to form the differential amplifier, and the four-port transformer
circuit operable to suppress even order intermodulation distortion signals on signals provided on the output ports.
|