A low-cost SAW-less GSM/GPRS SoC with integrated connectivity and 32-kHz crystal removal in 55nm

Chihming Hung,Chengchieh Lin,Shihchieh Yen,Poyang Chang, Yuehting Lee,Shengche Tseng,Mingyu Hsieh,Jianyu Ding, Yentsuo Chen,Yaochi Wang, Jianqiu Chen, Kuanchun Chen,Pomin Wang,Hungju Wei, Mingchou Wu

VLSI Circuits（2013）

引用 26|浏览3

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摘要

A single-chip SoC integrates GSM/GPRS, connectivity, application processors and peripheral functions. The SoC requires no external SAW filter and TX output matching for cellular, and 32 kHz crystal is removed. Using a proposed algorithm, the Real-Time Clock (RTC) dissipates 32 μA at 1.1 V. With a 96-dB DR ADC for RX, direct frequency modulation in PLL for TX, and extensive digital assistance, the cellular transceiver size is greatly reduced to 2.2 mm2 in 55nm digital CMOS. -111.4/-110.4 dBm RX LB/HB sensitivity was achieved and TX meets emission requirements. All radios can operate concurrently and meet their specifications.

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关键词

surface acoustic wave filters,system-on-chip,pll,saw less gsm/gprs soc,tx output matching,application processors,cellular transceiver size,crystal removal,current 32 mua,digital cmos,direct frequency modulation,extensive digital assistance,external saw filter,frequency 32 khz,integrated connectivity,real time clock,single chip soc,size 55 nm,voltage 1.1 v,calibration,ground penetrating radar,temperature measurement,gsm,crystals,system on chip

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