Examination of multi-bit delta-sigma ADC with frequency conversion function using even harmonic mixer

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  • 偶高調波ミクサを用いた周波数変換機能を持つマルチビットΔΣADCの検討
  • グウコウチョウハ ミクサ オ モチイタ シュウハスウ ヘンカン キノウ オ モツ マルチビットDSADC ノ ケントウ

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Description

A ΔΣ ADC using an even harmonic mixer with a frequency conversion function has been proposed. This enables high-speed and low-power wireless communication systems and reduced circuit area. In this paper, a multi-bit delta-sigma AD converter with a harmonic mixer in the loop is presented to improve the SNR. The effectiveness is evaluated by simulation results. The simulation results show that the proposed multi-bit converter can improve not only SNR but also harmonic distortion. The SNR is improved by 13.2 dB with a 4-bit internal ADC.

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