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May 2006 [Devices & ICs] Log Detector/Controller Scales 0.05 To 3.5 GHz Accurate power measurements are essential in many types of commercial and military systems. Logarithmic detectors have traditionally provided a reliable means of measuring power, but over limited frequency ranges. The new HMC600LP4 logarithmic detector/controller from Hittite Microwave Corp. (Chelmsford, MA) combines a wide frequency range with a wide dynamic range to support a variety of power-measurement applications at frequencies through 4 GHz. It is the first in a family... October 2003 [Devices & ICs] SiGe Direct Modulators Ease Upconverter Design Direct quadrature modulators provide many benefits to transceiver/transmitter designers working with modern digital-modulation formats. Compared to superheterodyne upconversion approaches, direct quadrature modulation enables simpler, smaller designs... |
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