A CMOS Sub-harmonic Mixer for WCDMA
نویسندگان
چکیده
This report describes a sub-harmonic mixer for WCDMA applications. The circuit converts a 2 GHz RF signal directly to baseband using a 1 GHz LO frequency. The mixer uses common source MOSFETs with inductive degeneration to convert the input RF voltage to a current. This current is then steered using a switching network composed of triode-region MOSFETs that is driven with the LO and a 90 degree phase-shifted version of the LO. The mixer has a voltage conversion gain of 8dB, a noise figure of 6.4dB, and an IIP3 of 5.3dBm. The performance has been verified using SpectreRF simulations.
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