PFM19030
Test Fixture
A metal-backed PCB with clamps for securing the module is used for module electrical testing and for
product demonstration. The fixture is supplied mounted to a finned heat sink. The fixture schematic is
provided on the following page.
This test fixture uses an active bias circuit, which sets the bias circuit through the Sense FETs (configured as
FETs) and applies the derived gate voltage to the associated RF FETs. This assures particular quiescent bias
currents, with accuracy determined by the Sense FET-to-RF FET current ratios.
Page 11 of 15 Specifications subject to change without notice. U.S. Patent No. 6,822,321
http://www.cree.com/
Rev. 2