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A down-conversion in-phase/quadrature(I/Q) mixer employing a folded-type topology,integrated with a passive differential quadrature all-pass filter(D-QAF),in order to realize the final down-conversion stage of a60 GHz receiver architecture is presented in this work.Instead of employing conventional quadrature generation techniques such as a polyphase filter or a frequency divider for the local oscillator(LO) of the mixer,a passive D-QAF structure is employed.Fabricated in a 65 nm CMOS process,the mixer exhibits a voltage gain of 7-8 dB in an intermediate frequency(IF) band ranging from 10 MHz-1.75 GHz.A fixed LO frequency of 12 GHz is used to down-convert a radio frequency(RF) band of 10.25-13.75 GHz.The mixer displays a third order input referred intercept point(IIP_3) ranging from-8.75 to-7.37 dBm for a fixed IF frequency of 10 MHz and a minimum single-sideband noise figure(SSB-NF) of 11.3 dB.The mixer draws a current of 6 mA from a 1.2 V supply voltage dissipating a power of 7.2 mW.
A down-conversion in-phase / quadrature (I / Q) mixer employing a folded-type topology, integrated with a passive differential quadrature all-pass filter (D-QAF), in order to realize the final down-conversion stage of a60 GHz receiver architecture is presented in this work. Instead of employing conventional quadrature generation techniques such as a polyphase filter or a frequency divider for the local oscillator (LO) of the mixer, a passive D-QAF structure is employed. Fabrics in a 65 nm CMOS process, the mixer exhibits a voltage gain of 7-8 dB in an intermediate frequency (IF) band ranging from 10 MHz-1.75 GHz. A fixed LO frequency of 12 GHz is used to down-convert a radio frequency (RF) band of 10.25-13.75 GHz. The mixer displays a third order input referred intercept point (IIP_3) ranging from -8.75 to-7.37 dBm for a fixed IF frequency of 10 MHz and a minimum single-sideband noise figure (SSB-NF) of 11.3 dB. The mixer draws a current of 6 mA from a 1.2 V supply voltage dissipating a power of 7.2 mW.