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April 2005 [Devices & ICs] RF Modulator Enables Multicarrier Transmitters Cellular transmitters rely on high-performance RF modulators to maintain linearity and dynamic range. With the growth of multicarrier transmitters, RF modulators must maintain a low noise floor while also delivering good high-level performance as determined by the second- and third-order intercept points. Fortunately, the MAX 2022 direct quadrature RF modulator from Maxim Integrated Products (Sunnyvale, CA) provides the performance needed from 1500 to 2500 MHz to support a wide range of... November 2002 [Components] DACs Deliver Multiple Carriers Digital-to-analog converters (DACs) continue to advance according to the needs of high-performance modern communications systems. As modern systems employ more elaborate modulation and multiple-carrier formats, the demands on system components such as... |
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