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A quad-band 2.5G SoC integrates all the RF, DSP, ARM, audio and other baseband processing functions into a single 65nm CMOS die. The radio draws a battery current of 49mA in the RX-mode, and 86mA in the GMSK TX-mode. The low-IF receiver achieves a sensitivity of -110dBm at the antenna, corresponding to a noise figure of 2.4dB at the device input. The 8PSK ±400kHz modulation mask is -64.1/62.7dBc for...
A technique to compensate for the harmful excess loop delay in a continuous time SigmaDelta analog-digital converter is presented. With no extra power consumption or area penalty the technique is suitable for variety of applications employing continuous time SigmaDelta analog-digital converters. This work presents a dual mode SigmaDelta ADC for GSM/WCDMA applications with DR of 86 dB/63 dB for 100...
This radio integrates all the receive and transmit functions required to support a quad-band GSM/GPRS/EDGE application into a single CMOS chip. Compared to the published work, this transceiver is implemented in low-cost digital 0.13 mum CMOS, achieves a superior receive and transmit performance, and yet has up to 2x lower receive power consumption, a key requirement in cellular applications.
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