Analog Circuit Design: RF Circuits: Wide band, Front-Ends, by Michiel Steyaert, Arthur H.M. van Roermund, Johan Huijsing PDF

By Michiel Steyaert, Arthur H.M. van Roermund, Johan Huijsing

ISBN-10: 1402038844

ISBN-13: 9781402038846

ISBN-10: 1402038852

ISBN-13: 9781402038853

Analog Circuit layout comprises the contribution of 18 tutorials of the 14th workshop on Advances in Analog Circuit layout. every one half discusses a particular todate subject on new and necessary layout rules within the zone of analog circuit layout. every one half is gifted through six specialists in that box and cutting-edge details is shared and overviewed. This ebook is quantity 14 during this profitable sequence of Analog Circuit layout, delivering priceless details and perfect overviews of analog circuit layout, CAD and RF systems.

Analog Circuit layout is an important reference resource for analog circuit designers and researchers wishing to maintain abreast with the most recent improvement within the box. the academic insurance additionally makes it appropriate to be used in a complicated layout course.

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Extra info for Analog Circuit Design: RF Circuits: Wide band, Front-Ends, DAC's, Design Methodology and Verification for RF and Mixed-Signal Systems, Low Power and Low Voltage

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The Low Pass Filter Thanks to the very good Spurious Free Dynamic range at the output of the DAC, the filter mainly needs to suppress the clock-alias components on the I and Q analog signal currents. A first order filter is sufficient to obtain more than 10 dB margin on the adjacent channel power specification. This first order filter is implemented using the 1/gm impedance of a cascode transistor and an additional capacitance. The variable gain amplifier The variable gain amplifier is implemented as a programmable current mirror.

Sometimes it is useful to chose non minimum L for the cascode in order to increase the output resistance. Remember that the limit stated in equation (2) is an upper-limit. It might thus be needed to raise the cascode output resistance. Increasing the length of this transistor does increase the drain capacitance, but it does not increase it too much. (a) (b) Fig. 10. (a) Layout of the switches and cascodes that optimizes the dynamic impedance by sharing drains and sources. (b) Asymmetric option to minimize the source capacitance of the switches.

The source is now common to the two switches. This layout results is slightly smaller capacitance compared to the layout in figure 10(a) but it is to be avoided. The asymmetry in the switches potentially results in different switching times for the right and left switch, leading to spurious frequencies. Sometimes it is useful to chose non minimum L for the cascode in order to increase the output resistance. Remember that the limit stated in equation (2) is an upper-limit. It might thus be needed to raise the cascode output resistance.

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Analog Circuit Design: RF Circuits: Wide band, Front-Ends, DAC's, Design Methodology and Verification for RF and Mixed-Signal Systems, Low Power and Low Voltage by Michiel Steyaert, Arthur H.M. van Roermund, Johan Huijsing


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