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本文提出一款2.2GHz连续时间ΔΣ模数转换器，实现了-102dBc的总谐波失真和25MHz带宽，适用于汽车收音机等宽频射频前端，满足高动态范围和线性度的需求。该设计无需滤波器即可直接连接射频前端，降低系统复杂性和干扰。
Shagun Bajoria1, Jan Niehof1, Robert Rutten1, Bert Oude-Essink2, Franco Fritschij2, Jagdip Singh2, Gerard Lassche2 NXP Semiconductors, Eindhoven, The Netherlands, Catena Microelectronics, Delft, The Netherlands 1 2 The trend towards wideband radio front-ends (RFE) for car radio receivers allows for digital tuning and channel filtering, simultaneous reception of multiple channels and reduced interference. A filter-less RFE requires a high dynamic range and very linear analog-to-digital converter (ADC). For AM/FM, typical total harmonic distortion (THD), intermodulation distortion and spurious tone levels of the ADC must be below -100dBc. These nonlinearity levels are much lower than the required ADC noise that is necessary to maintain high reception quality of a weak wanted signal in the presence of strong unfiltered interferers. Such audio-like linearity performance has been demonstrated for low input signal
Lucien Breems1, Muhammed Bolatkale1, Hans Brekelmans1,