Low-Power Linear Bulk-Injection Mixer for Wide-Band Applications

A novel high third-order intermodulation product (IIP3), low-power, inverter-based bulk-injection mixer design is presented in this letter. The architecture of the proposed mixer consists of four complementary MOS (CMOS) inverters that are connected to form a double-balanced mixer. Radio frequency (RF) signals are applied to the input of the inverters, while local oscillator (LO) signals are applied directly to the bulk voltage terminals of the inverters. The proposed mixer achieves a IIP3 of 0 dBm, a 3-dB RF bandwidth that spans 1 GHz to 6 GHz with an intermediate frequency (IF) of 100 MHz.

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