A Baseband-Noise-Cancelling Mixer-First CMOS Receiver Frontend Attaining 220 MHz IF Bandwidth With Positive-Capacitive-Feedback TIA

In this paper, by using the baseband noise cancellation, a CMOS mixer-first analog receiver with power reduction is proposed. Based on current-mirror transimpedance amplifier structure, positive capacitive feedback applied to manipulate poles/zeros location, enabling wide bandwidth and out-of-band second-order filtering profile. The additional radio frequency N-path 40dB/dec roll-off absorb interferences. presented frontend fabricated in standard 65 nm process. Measured results demonstrate minimal figure of 2.2 dB, an average voltage gain 32.2 dB across 220 MHz intermediate range. in-band third-order input intercept point manifests -12.8 dBm 15.5 respectively. circuit draws ~32 mW at typical 1 GHz local oscillator stimulus.