Title :
Low distortion and low noise oscillator-mixer IC for CATV converters
Author :
Nakatsuka, Tetsuya ; Ozeki, H. ; Sakashita, Seiji ; Tambo, T. ; Kanno, Issei ; Yamashita, Y. ; Nambu, S.
Author_Institution :
Matsushita Electron. Corp., Kyoto, Japan
Abstract :
A low-distortion and low-noise oscillator-mixer IC sufficient for practical use in CATV (cable television) converters has been successfully developed. The IC consists of a double-balanced mixer (DBM), a voltage-controlled oscillator (VCO), and balance-unbalance converters (baluns). To obtain high IM/sub 2/ (second-order intermodulation distortion) and low noise figure, special care for designing the IC was taken to suppress the unbalance in the DBM and baluns and to obtain high g/sub m/ in constituent FETs. The converter using the presented IC has superior characteristics to those of conventional converters by 15-20 dB in IM/sub 2/, 2-3 dB in noise figure, and less than -20 dB in local isolation for the CATV band.<>
Keywords :
cable television; field effect integrated circuits; frequency convertors; mixers (circuits); television equipment; variable-frequency oscillators; CATV converters; FETs; VCO; VHF/UHF type; balance-unbalance converters; baluns; cable television; double-balanced mixer; low noise figure; low-distortion; monolithic type; oscillator-mixer IC; second-order intermodulation distortion; voltage-controlled oscillator; FETs; Frequency conversion; Gallium arsenide; Impedance matching; Industrial electronics; Integrated circuit noise; Mixers; Noise figure; Noise measurement; Voltage-controlled oscillators;
Conference_Titel :
Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 1988. Technical Digest 1988., 10th Annual IEEE
Conference_Location :
Nashville, Tennessee, USA
DOI :
10.1109/GAAS.1988.11048
