IEEE S.F. Bay Area Council e-GRID's
BayAreaTech

Technology & Networking in Silicon Valley & the SF Bay Area: Upcoming Meetings, Courses and Conferences

March 1, 2008

Mtg: 1.8 Gpulses/s UWB Transmitter in 90nm CMOS

by @ 2:10 pm. Filed under ALL, Communications, Electronics Design, Engineering Mgmt, Semiconductors
 

THURSDAY March 20
SCV Solid State Circuits Chapter
Speaker: Murat Demirkan, University of California, Davis
Time: Refreshments at 6:00 PM; Presentation at 6:30 PM
Cost: small donation for food
Place: National Semiconductor Building E, Auditorium, 2900 Semiconductor Dr., Santa Clara
RSVP: not required
Web: www.ewh.ieee.org/r6/scv/ssc

 

This presentation is based on the speakerâ??s Ph.D. dissertation which focuses on the design of a pulse-based ultra-wideband (UWB) transmitter. The transmitter consists of a pulse generator, a phase-locked loop (PLL) and modulation circuitry. ? The novel pulse generator employs FIR filtering so that the transmitted signal is compliant with the indoor FCC spectral mask. ? The frequency-multiplying PLL is designed to provide an accurate timing reference. Implemented in a 90 nm standard digital CMOS process, the prototype transmitter achieves a maximum pulse rate of 1.8 Gpulses/s. ? The 2.83 mm2 chip consumes 227 mW from a 1 V supply and includes everything but the antenna.

Because the antenna is a critical part of the system that produces the final transmitted signal, a general method is presented for the modeling of arbitrary ultra-wideband antennas directly in RF circuit simulators in order to enable simulations of circuit performance with the antennas included. ? The antenna modeling approach is based on S-parameter measurements, which are conducted in an anechoic chamber. ? Since the FCC uses the EIRP to assess compliance with their regulations, being able to accurately simulate its value is important. ? In addition, a procedure to model multipath channels in the circuit domain is presented.

Since a voltage-controlled oscillator (VCO) is required for this project, the design of high-frequency, tunable VCOs was investigated. ? As a part of this investigation, VCOs with mutually coupled and switched inductors were implemented in a 90 nm digital CMOS process to demonstrate that the tuning range of an LC VCO can be improved with only a small increase in phase noise and die area. ? This work was done in collaboration with Stephen Bruss. One of the VCOs implemented has two extra coupled inductors and achieves a 61.9% tuning range with an 11.75 GHz center frequency while dissipating 7.7 mW from a 1.2 V supply. ? This VCO has a measured phase noise of -106 dBc/Hz at 1 MHz offset from the center frequency and its area is only 30% more than a conventional LC VCO with a single inductor.

 

Comments are closed.

[IEEE S.F. Bay Area Council - www.e-grid.net] [powered by WordPress .]

SF Bay Area Council

Categories

  • 5G (2)
  • ALL (4,702)
  • Antennas & Propagation (5)
  • BioEngineering (675)
  • Blogroll (33)
  • Circuits (16)
  • Communications (1,862)
  • Computers/Software (1,777)
  • Consumer Electronics (103)
  • Control Systems (23)
  • Electrical/Power (1,284)
  • Electronics Design (2,774)
  • Employment (4)
  • Employment opportunities (7)
  • Engineering Mgmt (1,819)
  • Green energy (48)
  • History (7)
  • Industrial Applications (91)
  • Information Theory (13)
  • Instrument and Measurement (1)
  • Magnetics (30)
  • Microwave (8)
  • NanoEngineering (876)
  • Optics/Displays (969)
  • Photonics (31)
  • PhotoVoltaics (4)
  • Product Safety (25)
  • Reliability (37)
  • Robotics and Automation (19)
  • Semiconductors (1,847)
  • Signal Processing (138)
  • Vehicular Technology (16)
  • Women in Engineering (8)
  • Young Professionals (5)
  •  

    Support our advertisers:

    Visit our
    GRID MARKETPLACE

    Enabling Javascript allows us to show you upcoming conferences in this column.

    For the Firefox browser, select Tools/Options/Content and select "Enable Javascript".

    If you are using Microsoft Internet Explorer you may need to click on the yellow bar above and select 'Allow Blocked Content'. You must then click 'Yes' on the following security warning.

    archives:

    November 2019
    S M T W T F S
    « May    
     12
    3456789
    10111213141516
    17181920212223
    24252627282930

    View in Google Calendar

    search blog:


    SUBSCRIBE: Get the e-GRID twice a month by email - upcoming IEEE SF Bay Area meetings, conferences.

    RSS Feed Subscribe to our RSS Feed.

    PUBLICIZE your event to IEEE's membership.


    general links:

    22 queries. 0.441 seconds