Read e-book online Analog-Baseband Architectures and Circuits for Multistandard PDF

By Pui-In Mak,Ben U Seng Pan,Rui Paulo Martins

With the earlier few decade efforts on lithography and integrated-circuit (IC) applied sciences, very reasonably cheap microsystems were effectively constructed for plenty of diversified functions. the craze in instant communications is towards making a networkubiquitous period within the years yet to come. Many remarkable possibilities and demanding situations, comparable to layout for multi-standardability and low-voltage (LV) compliance, are speedily turning into the mainstream instructions in wireless-IC examine and improvement, provided that the previous can provide the simplest connectivity between diversified networks, whereas the latter can facilitate the know-how migration into the sub-1-V nanoscale regimes for additional expense and tool aid. Analog-Baseband Architecturees and Circuits offers architectural and circuit strategies for instant transceivers to accomplish multistandard and low-voltage compliance. the 1st a part of the ebook stories the actual layer requirements of contemporary instant communique criteria, provides the elemental tradeoffs considering transceiver structure choice, and gives case reviews of the state of the art multistandard transceivers, the place the most important innovations bolstered are highlighted and mentioned. A statistical precis (with a hundred+ references stated) of so much used transmitter and receiver architectures for contemporary conversation criteria is equipped. the entire references are citied from the major boards, i.e., ISSCC, CICC, VLSI and ESSCIRC, from 1997 to 2005. the second one half specializes in the architectural layout of multistandard transceivers. A coarse-RF fine-IF (two-step) channelselection procedure is disclosed. It, during the reconfiguration of receiver and transmitter analog basebands, permits not just a leisure of the RF frequency synthesizer’s and native oscillator’s layout requisites, but additionally a good multistandard compliance by means of synthesizing the low-IF and zero-IF within the receiver; and the direct-up and two-step-up within the transmitter. the main is established in few layout examples. considered one of them is a system-in-a-package (SiP) receiver analog baseband for IEEE 802.11a/b/g WLAN. It not just has the two-step channel choice embedded, but in addition contains a flexible-IF topology, a distinct 3D-stack floorplan, and a specific layout method for prime testability and routability. The 3rd half offers with the circuit layout. as well as the methodical description of many LV circuit suggestions, three tailormade LV-robust practical blocks are offered. They contain: 1) a double-quadrature-downconversion filter out (DQDF) – it realizes simultaneously clock-rate-defined IF reception, I/Q demodulation, IF channel choice and baseband filtering. 2) A switched-current-resistor (SCR) programmable-gain amplifier (PGA) – it deals a transient-free constant-bandwidth achieve adjustment. three) An inside-OpAmp dc-offset canceler – it saves the silicon zone required for understanding a wide time consistent on chip whereas maximizing its highpass-pole switchability for quick dc-offset temporary. The final half provides experimental result of the three tailored construction blocks and a fully-integrated analog-baseband IC fabricated in a standard-VTH CMOS procedure. formerly untold on-/off-chip co-setup for either full-chip and development blocks measurements are defined. not just the development blocks have effectively prolonged the cutting-edge boundary by way of sign bandwidth and provide voltage, the analog-baseband IC has been to date the lowest-voltage-reported answer for IEEE 802.11a/b/g WLAN receivers.

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Analog-Baseband Architectures and Circuits for Multistandard and Low-Voltage Wireless Transceivers (Analog Circuits and Signal Processing) by Pui-In Mak,Ben U Seng Pan,Rui Paulo Martins

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