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该论文提出了一种对射频器件失配具有鲁棒性的谐波抑制混频器，通过使用基于正弦波系数的电导比例设置增益，并采用整数和分数部分电阻实现精确系数，从而在低中频频率下利用缓冲器的环路增益减少增益和相位误差，实现了超过60dB的系统谐波抑制比。
shown in Fig. 3.8.4. Loop Gain of this buffer at the low IF frequency helps to significantly reduce its gain and phase errors. Gains proportional to sine-wave coefficients are set by conductances proportional to sine-wave samples. For N=8, 12 and 16, the following half-sine-wave coefficients are used: [0 17 24 17], [6 /5 17 23 /5 23 /5 17 6 /5], [0 9 /5 17 22 /5 24 22 /5 17 9 /5], respectively. The integer part is realized using unit resistors in parallel, whereas the fractional part is realized using unit resistors in series. This results in a systematic HRR in excess of 60dB for all rejected harmonics. Quadrature phase output is obtained by using the above sine wave coefficients, shifted by N/4, as shown in Fig. 3.8.5. For N=6, half sine wave coefficients [17 23 /5 6 /5] and [17 -6 /5 -23 /5] are used to generate quadrature outputs. 1 Silicon Laboratories, Austin, TX Harmonic rejection (HR) mixers are key building blocks in wideband receivers
Aslam A Rafi, Alessandro Piovaccari, Peter Vancorenland, Tyson Tuttle, Multi-phase mixer outputs are buffered through super source-followers as