A SiGe HBT 6th-Order 10 GHz Inductor-Less Anti-Aliasing Low-Pass Filter for High-Speed ATI Digitizers

High-speed digitizers operating at sampling rates higher than 10GS/s require low-pass anti-aliasing filters in the multi-GHz range. Asynchronous Time-Interleaved (ATI) also need before digitization, and additional requirements on their design are set by this specific application. In integrated solutions, inductor-less important for minimizing chip area footprint. paper, we present of a 6th-order 10GHz filter implemented STMicroelectronics SiGe BiCMOS55 process. It can be used as conventional 30GS/s or output 40GS/s ATI digitizer. We exploit positive feedback to synthesize active inductor based stacked topology, number current branches, thus power consumption. Analysis guidelines biquad presented. The exhibits bandwidth with consumption 43mW, THD −45dB an SNR 43dB input amplitude 710mV peak-to-peak differential. Extensive corner Monte Carlo post-layout simulations have been carried out highlight robustness circuit PVT mismatch variations. Experimental results confirmed very good agreement between measured simulated performance, validating proposed flow.