S-Band 6-bit Digital Phase Shifter. GaAs Monolithic Microwave IC in SMD leadless package. The CHP4012-QEG is a 6-bit phase shifter monolithic circuit, which integrates a CMOS and TTL compatible interface. It is designed for a wide range of applications, typically defence and space systems. The circuit is manufactured with a pHEMT process, 0.25um gate length, via holes through the substrate, air bridges and electron beam gate lithography. It is supplied in RoHS compliant SMD package.