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Circuits and Devices Magazine, IEEE

Issue 6 • Date Nov. 1991

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Displaying Results 1 - 6 of 6
  • Simulation and Modeling-Extracting SPICE model parameters from data sheets

    Publication Year: 1991 , Page(s): 10 - 12
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (262 KB)  

    A simple way to extract useful SPICE parameter relationships from curves of typical h/sub FE/ versus I/sub c/ when using the Gummel-Poon model is presented. The approach is applied to two examples. One example is provided by Motorola data sheets for the 2N2222 transistor. The second example considered is the data sheet from Unitrode's 2N6350 Darlington bipolar transistor.<> View full abstract»

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  • MODFETs soar to 400 GHz

    Publication Year: 1991 , Page(s): 14 - 20
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (642 KB)  

    The operation of MODFETs (modulation-doped FETs) is explained. These devices now have switching delays under 5 ps, current-gain cutoff frequencies of about 250 GHz, and maximum oscillation frequencies in excess of 400 GHz. They also perform frequency division up to 26 GHz. Experimental ring oscillators, frequency dividers, static RAMs, and gate arrays are described. The microwave performance of MODFETs is discussed.<> View full abstract»

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  • Switching light with light

    Publication Year: 1991 , Page(s): 21 - 25
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (599 KB)  

    The basic characteristics of the light amplifying optical switch (LAOS) are explained. The LAOS, as compared to its electronic counterparts, will substantially reduce the interconnect time between components, chips, PC boards, and machines. The use of the LAOS to implement optical logic circuits with multiple input stages that invert and restore the input signal is discussed. Applications to image and signal processing are examined. Future uses are considered.<> View full abstract»

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  • The mathematics of success and failure (SPC)

    Publication Year: 1991 , Page(s): 26 - 30
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (468 KB)  

    The use of statistical process control (SPC) to improve quality is discussed. Mathematical tools and techniques for SPC are reviewed. How to decide when a change in an indicator is statistically significant is addressed. An approach to SPC in which one attempts to reduce process sensitivity to external variations rather than control these variations more tightly is discussed.<> View full abstract»

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  • Where do hot electrons come from? (MOSFETs)

    Publication Year: 1991 , Page(s): 31 - 34
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (469 KB)  

    Troublesome hot electrons that are appearing in MOSFETs, even at reduced drain voltages, due to scattering in the device channel are discussed. The use of the concept of 'electron temperature' to describe the energy spread that the electrons have as the result of the scattering is examined. The relationship between electron temperature and reliability is considered. The improvement in reliability that results from reducing the channel length, and thereby the amount of scattering, is discussed. The analysis of short-channel devices, is briefly addressed.<> View full abstract»

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  • Designer's Casebook-Simple bipolar, constant-power source

    Publication Year: 1991
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (99 KB)  

    Biasing of a gas-flow sensor heating element requires a constant power level, despite resistance changes in this element. A solution to this problem is shown.<> View full abstract»

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IEEE Circuits and Devices Magazine (1985-2006) covers the design, implementation, packaging, and manufacture of micro-electronic and photonic devices, circuits and systems

 

This Magazine ceased publication in 2006.

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Dr. Ronald W. Waynant
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