Charge-Domain Signal Processing of Direct RF SamplingMixer with Discrete-Time Filters in Bluetooth and GSM Receivers

RF circuits for multi-GHz frequencies have recently migrated to low-cost digital deep-submicron CMOS processes. Unfortunately, this process environment, which is optimized only for digital logic and SRAM memory, is extremely unfriendly for conventional analog and RF designs. We present fundamental techniques recently developed that transform the...