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The derivative superposition (DS) technique is used to cancel the third-order intermodulation distortion (IMD) produced in a downconverter mixer. By providing separate bias currents to the mixer core and the distortion-cancelling circuitry, the IMD is reduced but the conversion gain remains nearly the same in the distortion-cancelling mixer compared to the baseline mixer without linearization. Measurements...
A low-voltage active balun and amplifier is presented. The circuit uses a common-gate common-source (CG-CS) noise-cancelling topology with a simple distortion cancellation method to improve the IIP3 performance of the balun-amplifier. A Volterra series analysis is employed to provide insights into the nonlinear behavior of the circuit. A chip was fabricated and the experimental test results show an...
The design of a fully integrated balanced amplifier implemented in a 130 nm CMOS technology is described in this paper. This balanced amplifier achieves a gain of 30 dB from 19 GHz to 26 GHz. To reduce the signal loss and the physical dimensions of the 90° coupler utilized in this balanced amplifier, a meandered broadside coupler with shield is designed. This on-chip 90° coupler occupies a compact...
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