George Chien

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—A quad-band GSM/GPRS/EDGE receiver, implemented in 65 nm CMOS, complies with the ETSI standard without the need of external SAW filters. By exploring the properties of passive mixers and current-mode operation from RF to baseband, the receiver can achieve a SAW-filter-like selectivity with inexpensive on-chip components such as resistors and capacitors. In(More)
Issues associated with the integration of transceiver components on to a single silicon substrate are discussed. In particular, recently proposed receiver and transmitter architectures for high integration are examined on the promise of providing multistandard capability. In addition, existing barriers to lower power transceiver operation are examined as(More)
Brachial plexus avulsion is a rare and debilitating condition frequently associated with severe, intractable neuropathic pain. Interventional treatment modalities include dorsal root entry zone lesioning, stellate ganglion blockade, and neuromodulation such as spinal cord stimulation. We present a case of a 42-year-old woman with a traumatic left upper(More)