Benefits of Using VCO-OTAs to Construct TIAs in Wideband Current-Mode Receivers Over Inverter-Based OTAs.

A filterless blocker-tolerant current-mode receiver using a voltage-controlled oscillator-based operational transconductance amplifiers (VCO-OTAs) for the baseband transimpedance amplifiers (BB TIAs) is presented as an alternative to inverter-based OTAs (inv-OTAs). Three key advantages of VCO-OTAs over inv-OTAs are a high-dc gain, a higher bandwidth for a given dc gain, and independent control of ...