Analog Circuit Design: (X)DSL and other Communication by Jean-Philippe Cornil (auth.), Willy Sansen, Johan Huijsing,

By Jean-Philippe Cornil (auth.), Willy Sansen, Johan Huijsing, Rudy van de Plassche (eds.)

This new publication on Analog Circuit layout comprises the revised contributions of all of the instructional audio system of the 8 workshop AACD (Advances in Analog Circuit Design), which used to be held at great, France on March 23-25, 1999. The workshop was once equipped by means of Yves Leduc of TI great, France. this system committee consisted of Willy Sansen, K.U.Leuven, Belgium, Han Huijsing, T.U.Delft, The Netherlands and Rudy van de Plassche, T.U.Eindhoven, The Netherlands. the purpose of those AACD workshops is to assemble a constrained staff of approximately a hundred people who find themselves individually advancing the frontiers of analog circuit layout to brainstorm on new chances and destiny advancements in a constrained variety of fields. they're centred round 3 subject matters. In every one subject six audio system provide an instructional presentation. Eighteen papers are hence integrated during this ebook. the subjects of 1999 are: (X)DSL and different conversation structures RF so much versions built-in filters and oscillators the opposite issues, which were coverd earlier than, are: 1992 Operational amplifiers A-D Converters Analog CAD 1993 Mixed-mode A+D layout Sensor interfaces communique circuits 1994 Low-power low-voltage layout built-in filters clever strength 1995 Low-noise low-power low-voltge layout Mixed-mode layout with CAD instruments Voltage, present and time references vii viii 1996 RF CMOS circuit layout Bandpass sigma-delta and different information converters Translinear circuits 1997 RF A-D Converters Sensor and actuator interfaces Low-noise oscillators, PLL's and synthesizers 1998 I-Volt electronics layout and implementation of mixed-mode platforms Low-noise amplifiers and RF energy amplifiers for telecommunications

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Extra resources for Analog Circuit Design: (X)DSL and other Communication Systems; RF MOST Models; Integrated Filters and Oscillators

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R-~---r--;---+---r-~ - ... ••~~~~--~~~-6--~~ _ . .. 1 ,. • Building the modem Architecture : FEQ AOSL Refetoence Model Diliw Dil"'''. _. 43 " ••••• • Building the modem Filtering & Gain control ... TX Digital filtering Q Q Remove DMT sidelobes (sinc) Interpolation to ease filtering of analog image frequencies ... TX Analog filtering Q ~ Q Remove remaining image frequencies (see ANSI PSD mask) Remove oul-of-band noise (= RX echo) PGA implements 'politeness" rule ... RX Analog filtering & Gain control I Q Q Q Echo reduction Anti-Alias Filtering before ADC LNA needed to match ADC & Signal dynamics ...

There are other benefits to interpolating the sample rate. One is the opportunity it provides to perform the psd shaping in the digital interpolation filter and thereby reduce the order of the analog filter. In effect, we are trading analog filter complexity for digital filter complexity, and when symmetric FIR interpolating filters are employed, there is a net reduction in group delay distortion. For all these reasons, the optimal transmitter signal path consists of a digital interpolation filter, an oversampled DAC and a low-order continuous-time analog filter.

This a little misleading since it is 57 only possible if DAC-induced harmonic distortion can be neglected. 5-bit integral linearity can be used to take advantage of the oversampling factor. 5-bit resolution in order to support 15-bit constellations. Now consider the DAC quantization noise echo. 5dBm upstream. We may use these numbers to calculate the DAC quantization noise power measured on the subscriber loop. 3Vpp (FDD) downstream and 15Vpp upstream. 7-6Nup)dBm, respectively. 7-6Nup)dBm upstream.

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