Title :
Low noise, high linearity double-balanced active mixers using lossless feedback
Author_Institution :
Sonoran Radio Res., Tempe, AZ, USA
fDate :
6/24/1905 12:00:00 AM
Abstract :
A further development in the application of single-transformer lossless feedback to improve the performance of double-balanced active mixers is described, in which the significant sources of noise are removed without impairing the intermodulation performance. Noise figures of better than 6 dB are obtained while continuing to enjoy IIP performance of better than +25 dBm with a local oscillator power of just 0 dBm. A brief discussion of lossless feedback double-balanced active mixers is provided, and a generalized topology for low-noise lossless feedback mixers is described. Test data describing the intermodulation and noise performance of a specific example is presented.
Keywords :
circuit feedback; circuit noise; intermodulation distortion; mixers (circuits); 6 dB; IIP; double-balanced active mixers; intermodulation performance; linearity; local oscillator power; noise; single-transformer lossless feedback; Diodes; Impedance; Linearity; Local oscillators; Negative feedback; Noise figure; Noise measurement; Output feedback; Performance loss; Topology;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1009795
