Time-Amplifier Enhanced Phase Noise Filter

This letter presents a time-amplifier (TA) enhanced phase noise filter (TAPNF). The PN improvement strategy and resettable low noise TA design are presented. The 10-GHz TAPNF achieves 13.6/13.4/14.4-dB PN suppression and -125/-129/-132-dBc/Hz PN sensitivity at 1-MHz offset with the 20/40/80-ns delay lines, respectively. Compared with the PNF without TA, the TAPNF demonstrates 9 dB better PN sensitivity. This TAPNF is fabricated in a 65-nm CMOS process with 1.4 mm x 1.6 mm chip area and consumes 94.6-mW power.