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Memorial Tributes Volume 23 (2021) / Chapter Skim
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BARRIE GILBERT
Pages 120-125

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From page 121...
... Oscilloscopes held a special fascination for him. In 1959 he joined Mullard Ltd., a UK manufacturer of electronic components, where he developed almost all the key circuits for a transistorized sampling oscilloscope that could capture waveforms with GHz bandwidths.
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From page 122...
... In December 1968 he published two landmark papers in the IEEE Journal of Solid-State Circuits. The first, "A New Wide-Band Amplifier Technique," described a new circuit topology for amplification across very wide bandwidths, with the unique property that it is linear to large signals with a gain that is set precisely by the ratio of two biasing currents; obviously this was motivated by the needs of the vertical amplifier in an oscilloscope, which receives input waveforms of very different levels and whose gain, therefore, is selected across a large range.
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From page 123...
... In his paper Barrie brought forth and analyzed all obvious forms of residual inaccuracy arising from device and circuit imperfections in the computed product. To this day, the Gilbert four-quadrant multiplier circuit remains definitive.
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From page 124...
... He liked to design IC products end-to-end, worrying about matters such as the IC layout and the most user-friendly pin allocation on the package. He wrote data sheets for his products, their test plans when put into mass production, and extensive application notes that make for masterly tutorials.
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From page 125...
... He is survived by Alicia; former wife Myrna; children David (Wanda) of Gaston, Timothy of Bend, Lynn (David)
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Key Terms

  • design center
  • analog designers
  • circuit remains
  • multiplier circuit
  • circuit design

  • useful circuit
  • children david
  • wife myrna
  • receives input
  • logarithmic amplifiers

  • pin allocation
  • transistor designs
  • circuit principles
  • barrie brought
  • analog ics

  • acutely aware
  • temperature dependent
  • loop balance
  • nearly exhaustive
  • circuit idea

  • wireless communication
  • obvious forms
  • unique property
  • able team
  • former wife

  • remote design
  • barrie noticed
  • speech encryption
  • signal strength
  • debut publication


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