Pseudo-pseudo Differential Circuits

Pseudo-differential circuits approximate the performance of fully-differential structures, while allowing single-ended operation of the two half stages in the circuit. This requires duplication of the circuitry, with accurate symmetry needed between the two halves to cancel common-mode noise. This letter proposes a single-ended scheme which uses double sampling and time interleaving to achieve a performance comparable to that of differential circuits. It requires only half the complexity and reduced power dissipation compared to the fully- or pseudo-differential circuits.