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13 - SoC examples

Published online by Cambridge University Press:  05 March 2013

Sorin Voinigescu
Affiliation:
University of Toronto
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Summary

This chapter presents a possible design flow, along with biasing, isolation and layout strategies suitable for mm-wave SoCs. Competing transceiver architectures, self-test, and packaging approaches are reviewed next, followed by examples of mm-wave SoCs for a wide range of new applications.

What is a high-frequency SoC?

Although a precise definition is difficult to formulate, we define a high-frequency SoC as a single-chip radar, sensor, radio or wireline communication transmitter, receiver or transceiver that includes all high-frequency blocks, sometimes even the antennas, along with digital control and signal-processing circuitry.

Examples include:

  • 2GHz cell-phone or 5GHz wireless LAN transceivers

  • 40Gb/s or 100Gb/s SERDES

  • 60GHz radio transceiver

  • 77GHz automotive radar transceiver

  • W-, D-, and G-Band active and passive imagers.

DESIGN METHODOLOGY FOR HIGH-FREQUENCY SoCs

Most foundries have recently decided that the MOSFET and SiGe HBT compact models should capture the parasitic capacitance and resistance of only the first 1–2 metal layers, the minimum required for contacting all the device terminals. The rationale invoked is that this approach allows circuit designers more flexibility in the physical layout of transistors and of commonly encountered transistor groupings such as interdigitated differential pairs, interdigitated Gilbert cell quads, and latches. One (major) impediment is that, since most of the backend parasitics are not accounted for in schematic-level simulations, the burden is passed on to the designer to first lay out and then extract the parasitic impedance of the full wiring stack above the transistor in order to get an accurate simulation of circuit performance. This, in turn, creates a problem since, in most cases, the design starts with schematic-level simulations to find the optimal transistor size.

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  • SoC examples
  • Sorin Voinigescu, University of Toronto
  • Book: High-Frequency Integrated Circuits
  • Online publication: 05 March 2013
  • Chapter DOI: https://doi.org/10.1017/CBO9781139021128.014
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  • SoC examples
  • Sorin Voinigescu, University of Toronto
  • Book: High-Frequency Integrated Circuits
  • Online publication: 05 March 2013
  • Chapter DOI: https://doi.org/10.1017/CBO9781139021128.014
Available formats
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Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • SoC examples
  • Sorin Voinigescu, University of Toronto
  • Book: High-Frequency Integrated Circuits
  • Online publication: 05 March 2013
  • Chapter DOI: https://doi.org/10.1017/CBO9781139021128.014
Available formats
×