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A low-voltage and low-power CMOS mixer with an active balun is designed for frequency down-conversion in ultra-wideband applications. The mixer contains CMOS amplifiers as the LO buffer and the modulating stage in a folded configuration to allow low-voltage operation. The RF input signal comes from a new low-power active balun that uses a pair of common-source NMOS and common-gate PMOS transistors...
A new low-power CMOS active balun is designed for ultra-wideband applications, using a pair of common-source NMOS and common-gate PMOS transistors. This balun gives an impedance transformation ratio of 1:2. Without compensation feedback, the circuit provides a differential signal within 2dB and 3deg of gain and phase imbalance, respectively, up to 8-GHz. Total power consumption is only 1.44 mW at...
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