Analog Devices announced releases of its popular RF design tools, which now provide support for Hittite Microwave Corporation products from ADI. The ADIsimRF design tool enables engineers to model RF and microwave signal chains using devices from across ADI’s RF IC portfolio. ADIsimRF Version 1.9 adds 190 mixers, amplifiers, switches and attenuators, which are primarily from the Hittite portfolio. The ADIsimPLL design tool is a comprehensive and easy-to-use PLL (phased-locked loop) synthesizer design and simulation tool. ADIsimPLL Version 4 has been upgraded to include device models for the HMC703 and HMC704 PLLs and the HMC830, HMC832, ADF4355, ADF4355-2 and ADF5355 integrated PLLs and VCOs (voltage-controlled oscillators).