Analog-Baseband Architectures and Circuits for Multistandard - download pdf or read online

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

With the prior few decade efforts on lithography and integrated-circuit (IC) applied sciences, very inexpensive microsystems were effectively constructed for lots of diversified purposes. the fad in instant communications is towards making a networkubiquitous period within the years yet to come. Many extraordinary possibilities and demanding situations, equivalent to layout for multi-standardability and low-voltage (LV) compliance, are quickly turning into the mainstream instructions in wireless-IC learn and improvement, on condition that the previous can supply the easiest connectivity between assorted networks, whereas the latter can facilitate the expertise migration into the sub-1-V nanoscale regimes for extra fee and gear aid. Analog-Baseband Architecturees and Circuits provides architectural and circuit thoughts for instant transceivers to accomplish multistandard and low-voltage compliance. the 1st a part of the booklet stories the actual layer requirements of recent instant conversation criteria, provides the basic tradeoffs taken with transceiver structure choice, and gives case reports of the state of the art multistandard transceivers, the place the most important recommendations bolstered are highlighted and mentioned. A statistical precis (with a hundred+ references brought up) of such a lot used transmitter and receiver architectures for contemporary verbal exchange criteria is supplied. the entire references are citied from the top 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, throughout the reconfiguration of receiver and transmitter analog basebands, allows not just a rest of the RF frequency synthesizer’s and native oscillator’s layout requirements, but additionally a good multistandard compliance through synthesizing the low-IF and zero-IF within the receiver; and the direct-up and two-step-up within the transmitter. the main is validated in few layout examples. one in every 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 includes a flexible-IF topology, a special 3D-stack floorplan, and a selected layout technique for prime testability and routability. The 3rd half bargains with the circuit layout. as well as the methodical description of many LV circuit strategies, three tailormade LV-robust useful blocks are provided. They comprise: 1) a double-quadrature-downconversion filter out (DQDF) – it realizes at the same time 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 quarter 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 development blocks and a fully-integrated analog-baseband IC fabricated in a standard-VTH CMOS method. 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 state of the art 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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