Integration of digital-to-analog converter and sallen-key biquad for future transmitters

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Volume Title

Sähkötekniikan korkeakoulu | Master's thesis
Ask about the availability of the thesis by sending email to the Aalto University Learning Centre oppimiskeskus@aalto.fi

Authors

Date

2016-10-31

Department

Major/Subject

Micro and Nanotechnology

Mcode

S3010

Degree programme

EST_2

Language

en

Pages

50

Series

Abstract

Thesis presents the design of Digital-to-Analog (D/A) converter implemented in a standard 65nm CMOS technology with the active low-pass filter integrated at the output for future transmitters. The combination of binary weighted resistor ladder D/A converter and a 2nd order low-pass Sallen-Key filter with cut-off frequency 21MHz is chosen to support Long Term Evolution (LTE) communication systems. The sinusoidal dual tone signal (6MHz and 200MHz) is given as a digital input for the simulations. The filter architecture is differential based on the Sallen-Key biquad structures, where the miller-compensated differential amplifier is an active element and the resistors and capacitors are passive elements. The design work initializes with the study of various D/A converters and their applications. Next, the study of active filters is undertaken by comparing various architectures. Furthermore, the work is divided into several stages, starting with the implementation and simulation of ideal models followed by the transistor level simulations. Finally, the comparison between the ideal model simulations and schematic level simulations is presented for deeper insight.

Description

Supervisor

Ryynänen, Jussi

Thesis advisor

Kosunen, Marko

Keywords

digital-to-analog converter, sallen-key low-pass filter, integration, direct digital conversion, source follower, miller-compensated differential amplifier

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Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-201611025291

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[dipl] Sähkötekniikan korkeakoulu / ELEC