A 1.6 GS/s Spectrum Channelizer with PWM-LO Based Sub-band Equalization

A frequency-folded ADC (FF-ADC) [1] partitions the spectrum of an incident signal into N contiguous sub-bands using the harmonics of a switching clock waveform. In this architecture, a broadband input spectrum is downconverted and aliased to baseband by employing N polyphase, non-overlapping rectangular clocks. The aliased sub-bands are bandlimited at baseband, digitized and subsequently channeliz...