Using Blocking Capacitors with UltraCMOS Devices

Peregrine’s UltraCMOS switches and DSAs have many advantages over other technologies. One advantage is that no blocking capacitors are required when 0 VDC exists on RF ports. However, for applications placing non-zero DC voltages on the RF ports, blocking capacitors are required. In addition, blocking capacitors used with certain part numbers can still have performance limitations. This application note describes the use of blocking capacitors with UltraCMOS devices and recommends a solution to ensure optimal performance for all use cases.