Quadrature passive mixer and frequency down converter for enhancing IIP2

Abstract

Proposed is related to a quadrature passive mixer and a frequency down-converter for enhancing an input referred second-order intercept point (IIP2). More particularly, proposed is related to a quadrature passive mixer and a frequency down-converter for enhancing the IIP2 capable of improving the IIP2 by reducing a mismatch component of a mixer block used for frequency downconversion of a wireless communication system. Here, the frequency down-converter for improving the IIP2 according to the embodiment of the present invention includes an RF quadrature signal generator, an LO IQ signal generator, a 25% LO signal generator, an LO buffer, an I-quadrature mixer, and a Q-quadrature mixer. In addition, the I-quadrature mixer and the Q-quadrature mixer receive RF quadrature signals from the RF quadrature signal generator and selectively downconvert and output the RF quadrature signals according to the 25% duty-cycle LO signals applied from the LO buffer.

Dependencies are inferred from the claim text.