A TVWS receiver with balanced output self-calibrated IIP2 LNTA employing a low-noise current multiplier

A broadband, inductorless receiver including a noise-canceling low-noise transconductance amplifier (LNTA), suitable for TV White-Space applications is presented. The LNTA has single-ended input and balanced output, allowing double-balanced mixing for high IIP2. The circuit consists of a common-gate stage with a feed-forward noise-canceling common-source path. High common-source transconductance improves noise but leads to unbalanced output currents, re-balanced with a low-noise current multiplier. A self-calibrating loop boosts the IIP2 above 52 dBm across process corners. The LNTA bandwidth is from 100 MHz to 1 GHz. Power consumption is only 3 mW for a NF < 2.6 dB and an IIP3 of 1 dBm.