Title :
A low-cost SAW-less GSM/GPRS SoC with integrated connectivity and 32-kHz crystal removal in 55nm
Author :
Chih-Ming Hung ; Cheng-Chieh Lin ; Shih-Chieh Yen ; Po-Yang Chang ; Yueh-Ting Lee ; Sheng-Che Tseng ; Ming-Yu Hsieh ; Jian-Yu Ding ; Yen-Tsuo Chen ; Yao-Chi Wang ; Jian-Qiu Chen ; Kuan-Chun Chen ; Po-Min Wang ; Hung-Ju Wei ; Ming-Chou Wu
Author_Institution :
MStar Semicond. Inc., Chupei, Taiwan
Abstract :
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.
Keywords :
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; Clocks; Crystals; GSM; Ground penetrating radar; System-on-chip; Temperature measurement;
Conference_Titel :
VLSI Circuits (VLSIC), 2013 Symposium on
Conference_Location :
Kyoto
Print_ISBN :
978-1-4673-5531-5
