Diodes has a family of low noise block (LNB) controllers for direct broadcast satellite (DBS) applications. 

According to the supplier, the six controllers have been designed to exceed the latest DBS broadcast specifications.

The ZNBG3118 device provides bias control and protection for up 3 GaAs and HEMT FET low noise amplifiers.  The controller integrates an accurate voltage detector for LNB polarisation channel selection and an advanced tone detector for local oscillator selection for band switching.

ZABG4002 and ZABG6002 are low power fixed bias controllers for 4 and 6 stage FET low noise amplifiers respectively, providing each FET with an independent protected negative gate voltage and positive drain voltage with user programmable drain current selectable from 0 to 15mA.

Offering a choice of high and standard accuracy polarisation voltage detection are the ZLNB2015 and ZLNB2016 advanced DBS dual voltage and tone detectors.  

For more information, see http://http://www.diodes.com/dbs