Fig. 1.
Traditional direct conversion receiver architecture
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Mingyi Chen, Liguo Zhou, Chenghao Bian, Jun Yan, Yin Shi. A 2.52-mW continuous-time Σ Δ modulator with 72 dB dynamic range for FM radio[J]. Journal of Semiconductors, 2014, 35(10): 105004. doi: 10.1088/1674-4926/35/10/105004
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M Y Chen, L G Zhou, C H Bian, J Yan, Y Shi. A 2.52-mW continuous-time Σ Δ modulator with 72 dB dynamic range for FM radio[J]. J. Semicond., 2014, 35(10): 105004. doi: 10.1088/1674-4926/35/10/105004.
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A 2.52-mW continuous-time Σ Δ modulator with 72 dB dynamic range for FM radio
DOI: 10.1088/1674-4926/35/10/105004
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Abstract
A continuous-time Σ Δ modulator with a third-order loop filter and a 3-bit quantizer is realized. The modulator is robust to the excess loop delay, clock jitter, and RC product variations. When designing the integrator, an op-amp with novel GBW extension structure, improving the linearity of the loop filter, is adopted. The prototype chip is designed in a 130 nm CMOS technology, targeting FM radio applications. The experimental results show that the prototype modulator achieves a 72 dB dynamic range and a 70.7 dB signal to noise and distortion ratio over a 500 kHz bandwidth with a 26 MHz clock, consuming 2.52 mW power from a 1.2 V supply. -
References
[1] Breems L J, van der Zwan E J, Dijkmans E C, et al. A 1.8 mW CMOS sigma delta modulator with integrated mixer for A/D conversion of IF signals. IEEE J Solid-State Circuits, 2000, 35(4):468 doi: 10.1109/4.839907[2] Van der Zwan E J, Philips K, Bastiaansen C A A. A 10.7-MHz IF-to-baseband sigma delta A/D conversion system for AM/FM radio receivers. IEEE J Solid-State Circuits, 2000, 35(12):1810 doi: 10.1109/4.890294[3] Silva P, Breems L J, Makinwa K, et al. A 118 dB DR CT IF-to-baseband Σ Δ modulator for AM/FM/IBOC radio receivers. IEEE ISSCC Dig Tech Papers, 2006:66[4] Breems L J, Rutten R, van Veldhoven R, et al. A 56 mW CT quadrature cascaded sigma delta modulator with 77 dB DR in a near zero-IF 20 MHz band. IEEE ISSCC Dig Tech Papers, 2007:238[5] Paton S, Giandomenico A D, Hernandez L, et al. A 70-mW 300-MHz CMOS continuous-time sigma delta ADC with 15-MHz bandwidth and 11 bits of resolution. IEEE J Solid-State Circuits, 2004, 39(7):1056 doi: 10.1109/JSSC.2004.829925[6] Mitteregger G, Ebner C, Mechnig S, et al. A 20-mW 640-MHz CMOS continuous-time sigma-delta ADC with 20-MHz signal bandwidth, 80-dB dynamic range and 12-bit ENOB. IEEE J Solid-State Circuits, 2006, 41(12):2641 doi: 10.1109/JSSC.2006.884332[7] Schoofs R, Steyaert M S J, Sanse W M C. A design-optimized continuous-time delta-sigma ADC for WLAN applications. IEEE Trans Circuits Syst I, 2007, 54(1):209 doi: 10.1109/TCSI.2006.887455[8] Li Z M, Fiez T S. A 14 bit continuous-time delta-sigma A/D modulator with 2.5 MHz signal bandwidth. IEEE J Solid-State Circuits, 2007, 42(9):1873 doi: 10.1109/JSSC.2007.903086[9] Yan S L, Sanchez-Sinencio E. A continuous-time Σ Δ modulator with 88-dB dynamic range and 1.1-MHz signal bandwidth. IEEE J Solid-State Circuits, 2004, 39(1):75 doi: 10.1109/JSSC.2003.820856[10] Gong Zhen, Chen Bei, Hu Xueqing, et al. A low power 8th order elliptic low-pass filter for a CMMB tuner. Journal of Semiconductors, 2011, 32(9):095002 doi: 10.1088/1674-4926/32/9/095002[11] Li Ran, Li Jing, Yi Ting, et al. A 18-mW, 20-MHz bandwidth, 12-bit continuous-time Σ Δ modulator using a power-efficient multi-stage amplifier. Journal of Semiconductors, 2012, 33(1):015007 doi: 10.1088/1674-4926/33/1/015007[12] Li Yuanwen, Qi Da, Dong Yifeng, et al. A 1-V 60-μW 85-dB dynamic range continuous-time third-order sigma-delta modulator. Journal of Semiconductors, 2009, 30(12):125011 doi: 10.1088/1674-4926/30/12/125011[13] Song T Y, Cao Z H, L Yan S. A 2.7-mW 2-MHz continuous-time Σ Δ modulator with a hybrid active-passive loop filter. IEEE J Solid-State Circuits, 2008, 43(2):330 doi: 10.1109/JSSC.2007.914258[14] Grilo J, Galton I, Wang K, et al. A 12-mW ADC delta-sigma modulator with 80 dB of dynamic range integrated in a single-chip Bluetooth transceiver. IEEE J Solid-State Circuits, 2002, 37(3):271 doi: 10.1109/4.987077 -
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