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On-Demand Webinar
T-Coils: Add 2.72x Bandwidth to your RF Designs and More!
Overview:
When attempting to create wide bandwidth amplifiers, RF designers are confronted by the fact that the load eventually becomes capacitive and the source has a finite driving point resistance. This creates a single pole filter with a bandwidth of 1/(2piRC). To get more bandwidth, we use the concept of "peaking circuits". One such circuit is called a T-Coil (so named because of its schematic representation). This circuit has three remarkable properties:
  • It can provide a bandwidth of 2.72/(2piRC) for a bandwidth improvement factor of 2.72.
  • It does this while keeping the circuit response Maximally Flat Envelop Delay (MFED) such that it will have excellent step response with no overshoot in the time domain. (It should be noted that the filter response can be anything desired from MFA, to MFED, to elliptic.)
  • It provides a matching network that converts the capacitor to a resistor for all frequencies (as long as the passive elements that make up the circuit remain ideal).
All these features make T-Coils very useful even if wideband amplification isn't needed.

Duration: One hour

Who should view this webcast:
RF/microwave Design engineers, Wideband amplifier design engineers, UWB circuit designers, Analog engineers

Giveaway:
Registrants who complete the feedback form by July 15 will be entered in a drawing to win one of two $75 Amazon.com gift certificates. Official Rules

Presenter:
Allen Hollister, Besser Associates
Allen Hollister received Bachelors and Masters degrees from the University of Nebraska. After college, Allen worked for Tektronix for 15 years rising to the level of Principal Engineer. He spent two years teaching advanced electronics at Portland State University. Allen holds eight patents and has filed for six more including four in the field of RFID. Allen authored the book Wideband Amplifier Design for SciTech Publishing. Allen has served as either a Director of Engineering or VP of Engineering for the last 15 years. He is currently VP of Engineering for Probe Science Inc., a consulting and contract engineering firm specializing in RF, communications, and medical electronics. Allen is also a Besser Associate and teaches two seminars for Besser: Wideband Amplifier Design and RFID.


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Original Broadcast Date
Apr 03, 2008
Status
Available On-Demand
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