Synchronous Mixing Architecture for Digital Bandwidth Interleaving Sampling System

By using a mixer to down-convert the high frequency components of signal, digital bandwidth interleaving (DBI) technology can simultaneously increase sampling rate and system, compared time-interleaved hybrid filter bank. However, software hardware classical architecture are too complicated, which also leads poor performance. In particular, pilot tone used synchronize analog local oscillators (LO) mixers intermodulates with resulting in larger spurs. This paper proposes synchronous mixing for DBI where LO is synchronized clock analog-to-digital converter. Its simplified—the LOs be removed. An evaluation platform 250 MSPS implemented illustrate performance new architecture. The result shows that spurious free dynamic range (SFDR) more than 20 dB higher one range. rise time step signal 0.578 ± 0.070 ns faster same (90 MHz).