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Download Analog-Baseband Architectures And Circuits For Multistandard by Pui-In Mak, Ben U Seng Pan, Rui Paulo Martins 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 inexpensive microsystems were effectively constructed for lots of assorted functions. the craze in instant communications is towards making a networkubiquitous period within the future years. Many exceptional possibilities and demanding situations, similar to layout for multi-standardability and low-voltage (LV) compliance, are speedily changing into the mainstream instructions in wireless-IC learn and improvement, provided that the previous can supply the easiest connectivity between diversified networks, whereas the latter can facilitate the expertise migration into the sub-1-V nanoscale regimes for additional expense and tool aid.

Analog-Baseband Architecturees and Circuits presents architectural and circuit thoughts for instant transceivers to accomplish multistandard and low-voltage compliance. the 1st a part of the publication experiences the actual layer standards of contemporary instant communique criteria, provides the elemental tradeoffs excited about transceiver structure choice, and gives case reports of the state of the art multistandard transceivers, the place the foremost options bolstered are highlighted and mentioned. A statistical precis (with a hundred+ references mentioned) of so much used transmitter and receiver architectures for contemporary conversation criteria is equipped. all of the references are citied from the prime boards, i.e., ISSCC, CICC, VLSI and ESSCIRC, from 1997 to 2005.

The moment half specializes in the architectural layout of multistandard transceivers. A coarse-RF fine-IF (two-step) channelselection procedure is disclosed. It, in the course of the reconfiguration of receiver and transmitter analog basebands, allows not just a rest of the RF frequency synthesizer’s and native oscillator’s layout necessities, but in addition 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 verified in few layout examples. one in all 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 specific layout technique for top testability and routability.

The 3rd half offers with the circuit layout. as well as the methodical description of many LV circuit recommendations, three tailormade LV-robust sensible blocks are awarded. 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 bargains a transient-free constant-bandwidth achieve adjustment. three) An inside-OpAmp dc-offset canceler – it saves the silicon sector required for knowing a wide time consistent on chip whereas maximizing its highpass-pole switchability for quick dc-offset transient.

The final half offers experimental result of the three tailored development blocks and a fully-integrated analog-baseband IC fabricated in a standard-VTH CMOS approach. formerly untold on-/off-chip co-setup for either full-chip and construction 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 up to now the lowest-voltage-reported resolution for IEEE 802.11a/b/g WLAN receivers.

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