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APN1005 - A Balanced Wideband VCO

General Description

of the parameters employed.

Figure 5.

Skyworks Solutions, Inc.

Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 4 July 21, 2005 Skyworks Proprietary Information Products an

Key Features

  • orate this function into Libra, the pwl() built-in function was used in the “variables” component of the schematic bench. M = pwl (VVAR 0 2 2.5 2 2.500009 25 6.5 25 6.50009 7.3 11 7.3 11.0009 1.8 40 1.8) VJ = pwl (VVAR 0 4 2.5 4 2.500009 68 6.5 68 6.50009.

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www.DataSheet.co.kr APPLICATION NOTE APN1005: A Balanced Wideband VCO for Set-Top TV Tuner Applications Introduction Modern set-top TV DBS tuner systems require more channel coverage, while maintaining competitive prices. This situation creates tough design goals: to improve performance and simplify design. Balanced VCO configuration could be a competitive circuit solution, since it provides the widest tuning range with practical circuitry and layout. However, tuning margins would be further improved by optimizing the varactor manufacturing process. Skyworks has developed such a process to satisfy the most ambitious wideband design goals.