Low Noise Block Satellite Controllers
Wed, 09/26/2007 - 8:17am
Zetex Semiconductors announces its ZXNB low noise block (LNB) satellite controllers that integrate all bias, control and power management functions into a single chip, achieving LNB size reductions of up to 30 percent. They minimize PCB size, routing complexity, component counts and aluminum housing size. Three models have been introduced: The ZXNB4100 (negative volt bias) and ZXNB4200 (zero volt bias) for single universal LNBs with FET switching topologies, and the ZXNB2200 for C-band LNB designs. Offered in 16-pin 3 mmࡩ mm and 4 mmࡪ mm QFN packages, the controllers require three external components to function. They provide biasing for up to three GaAS FET LNA stages and an active mixer. The drain current of LNA FETs and the active mixer is user-selectable via an external reference resistor.