MOSFET-only Mixer/IIR filter with gain using parametric amplification

This paper describes the design of a discrete-time passive Mixer/IIR filter. The use of an improved MOS Parametric Amplification leads to a moderate gain in the signal path and improved noise performance, instead of the conversion loss inherent to passive mixers. Simulation results demonstrate that, employing the proposed MPA structure based on a modified double-complementary topology with floating terminals, an improvement of over 4 dB in the overall circuit gain and up to 2 dB in the noise figure can be achieved.