An Intuitive Current-Driven Passive Mixer Model Based on Switched-Capacitor Theory

作者：Sosio Marco^*; Liscidini Antonio; Castello Rinaldo

来源：IEEE Transactions on Circuits and Systems II-Express Briefs, 2013, 60(2): 66-70.

DOI：10.1109/TCSII.2012.2234993

• Current-driven passive mixers
• down-conversion gain
• noise figure
• quadrature chain
• wireless receivers (RXs)

An intuitive current-driven passive mixer model is presented. Without using complex math, it provides a signal-transfer-function/noise description of a passive mixer when used in a wireless receiver (RX) chain driven by a transconductor and loaded by a low-pass baseband (BB). Exploiting a switched-capacitor approach, the model represents a useful tool for simple hand analysis and design. The case of a 25%-duty-cycle quadrature RX chain based on a transimpedance amplifier at BB is analyzed in detail and compared with simulations, showing good accuracy.

• 出版日期2013-2