A BiCMOS 50 MHz input bandwidth, 1-to-16 channelizer optimized for low power analog signal classification

A base-band channelizer, fabricated in a 0.18um BiCMOS process, capable of separating an input 50 MHz bandwidth signal into 16 output 3.125 MHz bandwidth signals intended for multi-channel independent component analysis (ICA) for signal classification is presented. The channelizer operates in a purely analog fashion to interface with an analog ICA system to optimize energy efficiency. Each channel within the 50 MHz bandwidth is up/down converted using active mixers and is low-pass filtered. Harmonic rejection mixers and clock predistortion techniques are employed in order to eliminate clock harmonic folding. A two-stage, quarter-band separation architecture is employed to split the 50 MHz baseband signal into 16 consecutive channels simultaneously. The measured input signal HD3 and LO 3^rd-order harmonic mixing is below -40 dBc. The measured power consumption is 71.5mW from a 2.5V power supply.