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Low distortion and low noise oscillator-mixer IC for CATV converters

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7 Author(s)
Nakatsuka, T. ; Matsushita Electron. Corp., Kyoto, Japan ; Ozeki, H. ; Sakashita, S. ; Tambo, T.
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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.<>

Published in:

Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 1988. Technical Digest 1988., 10th Annual IEEE

Date of Conference:

6-9 Nov. 1988