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To collect neuronal activity data from awake, behaving freely animals, we developed miniaturized telemetry recording system. The integrated system consists of four major components: (1) microelectrodes and micro-driver assembly; (2) analog front end (AFE); (3) Programable system on chip (PSoC); (4) Radio transceiver and the LabVIEW used as a platform for the graphic user interface. The result showed...
IEEE 802.22 is the first worldwide Wireless Regional Area Networks (WRAN) standard based on cognitive radios (CR). In IEEE 802.22 WRAN, if a wireless microphone appears in any TV channel, the whole channel should be cleaned. 802.22 WRAN devices probably need to fractionally use the first adjacent channel for improving spectrum efficiency while ensuring no harmful interference is caused to the wireless...
This paper presents the design and the measurement results of a 3-5-GHz down-converter fabricated in a 90-nm CMOS technology. The circuit consists of a single-ended resistive-feedback low-noise amplifier and two I/Q double-balanced mixers. A transformer-based on-chip single-ended-to-differential conversion allows gain and noise performance to be optimized at a very-low power. A post-layout stability...
The properties of hetero and mono FET and BT devices are reviewed and discussed in the context of their suitability for high frequency and noise. GaAs based devices have a defined place in commercial and many more applications. The heterojunction bipolar transistor (HBT) basically is a modified bipolar transistor. The emitter and base layers are formed with different bandgap material. The emitter...
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