This tract describes in detail the semiconductor components of the high-frequency front end-the electronic tuner-of televisions and VCRs. These high-frequency components substantially determine performance, including clarity of reception, and thus their quality is crucial to the success of electronic tuners. The semiconductor devices involved-voltage-variable capacitance diodes, band-switch diodes, dual-gate FETs, and others-are discussed in this book, as is their performance as mediators of tuning and amplification. Special emphasis is put on the analysis of distortion characteristics of tuning diodes and FETs, which are essential in providing tuners with high endurance against interfering signals. Design and fabrication processes well suited for mass production are also described. The content will be most informative not only to those involved in R&D and production of semiconductor devices, but also to high-frequency systems designers.
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