76- to 81-GHz CMOS Built-In Self-Test With 72-dB C/N and Less Than 1 ppm Frequency Tolerance for Multi-Channel Radar Applications

A built-in self-test (BIST) system with a 72-dB carrier-to-noise ratio (C/N) and less than 1-ppm frequency tolerance of down-converted BIST tone for a multi-channel radar application is presented. The BIST consists of a frequency doubler, an up-conversion mixer (UPMIX), a variable gain amplifier, a phase shifter, an eight-way splitter, and an RF PAD coupler for BIST signal distribution. The propos...