High dynamic range radio architecture with enhanced image rejection

A circuit comprising:

• a trans-admittance amplifier receiving a Radio Frequency (RF) signal and generating in response a pair of differential current signals;
• a trans-impedance amplifier comprising at least four mixers and at least four amplifiers, the at least four mixers down-converting a frequency of the received pair of differential current signals to generate a first differential signal pair TZ0 having a relative phase of 0 degrees, a second differential signal pair TZ45 having a relative phase of 45 degrees, a third differential signal pair TZ90 having a relative phase of 90 degrees, and a fourth differential signal pair TZ135 having a relative phase of 135 degrees, each of the four pairs of differential signals having a phase corresponding to a different phase of a local oscillator signal, each of the at least four amplifiers being associated with a different one of the four pairs of differential signals;
• and
• a summing block adapted to:
• generate an in-phase signal using a first weighted sum of the four differential signals;
• and
• generate a quadrature phase signal using a second weighted sum of the four differential signals, wherein the generated in-phase signal is defined substantially by
• TZ0+(√2+1)TZ45+(√2+1)TZ90+TZ135.