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XU1019-QH Datasheet(PDF) 5 Page - Mimix Broadband |
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XU1019-QH Datasheet(HTML) 5 Page - Mimix Broadband |
5 / 10 page Page 5 of 10 App Note [1] Biasing - As shown in the Pin Designations table, the device is operated by biasing Vd1, Vd2, and Vd3 at 4.0V. The corresponding drain currents are set to 120mA, 120mA, and 150mA respectively. Vg4 requires a fixed voltage bias of nominally -3V. It is recommended to use active bias on Vg1, Vg2, Vg3 to keep the currents in Vd1, Vd2, and Vd3 constant, in order to maintain the best performance over temperature. Depending on the supply voltages available and the power dissipation constraints, the bias circuits may include a single transistor or a low power operational amplifier, with a low value resistor in series with the drain supply to sense the current. Make sure to sequence the applied voltage to ensure negative gate bias is available before applying the positive drain supply. App Note [2] IF1/IF2 versus IF1*/IF2* - The IF input to the typical configuration is through a 90deg hybrid coupler. The hybrid splits the IF input into inphase and quadrature phase components. These two signals enter the XU1019-QH on either the IF1/IF2 pair, or the IF1*/IF2* complimentary pair. Which ever pair are not used must be terminated into 50 ohms. There are subtle differences between the performance when using the main IF ports (IF1,IF2) versus the complimentary ports (IF1*, IF2*) which are shown in the preceding performance curves. For highest gain, best image rejection and lowest noise figure, the complimentary ports (IF1*, IF2*) should be used. 37.0-40.0 GHz Up-Converter QFN, 4x4mm U1019-QH Mimix Broadband, Inc., 10795 Rockley Rd., Houston,Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Characteristic Data and Specifications are subject to change without notice. ©2010 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. January 2010 - Rev 27-Jan-10 |
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Similar Description - XU1019-QH |
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