Notification:
We are currently experiencing intermittent issues impacting performance. We apologize for the inconvenience.
By Topic

Circuits and Devices Magazine, IEEE

Issue 2 • Date March 1993

Filter Results

Displaying Results 1 - 6 of 6
  • Simulation and modeling-new macro model for Zeners

    Publication Year: 1993 , Page(s): 7 - 11
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (451 KB)  

    A macro model of the 6.2-V 1N5920B Zener diode which very accurately represents the measured characteristics both in the DC and AC domain is presented. For users who do not have access to optimization software, the model can still be easily customised for other Zener diodes by replacing the emission coefficients (N), saturation currents (Is) and series resistance (Rs) under forward and reverse bias. One would also need to modify the temperature coefficient and measure the capacitance (CIO) at V/sub d/=0 V bias, to have a functional model of the Zener diode. However, there is no easy technique to extract the TT parameter without going through an extraction process. Therefore, without modification to the T1 parameter, one has to be careful when using the customized model for switching applications.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multiple quantum-well technology takes SEED

    Publication Year: 1993 , Page(s): 12 - 18
    Cited by:  Papers (4)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (895 KB)  

    Progress in the development of self-electrooptic-effect devices (SEEDs) is discussed. The devices include the resistor-SEED (R-SEED) device, which can be viewed as a simple NOR gate. The symmetric SEED (S-SEED) and the logic-SEED (L-SEED) devices with improved features, functionality, and performance are also considered. The integration of FETs with multiple quantum well (MQW) modulators (FET-SEED), enables optical interconnections of electronic circuits. Where the SEED technology can be used is discussed, and an experimental optical switching fabric made using these devices is described.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Smart pixels for two-dimensional arrays

    Publication Year: 1993 , Page(s): 19 - 27
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (799 KB)  

    Optical switching-and-logic technology for use in two-dimensional smart-pixel arrays is discussed. The technology is integrable and cascadable. Optically controlled vertical cavity self-emitting laser (VCSEL)-based switches, Boolean optical logic, and reconfigurable optical switching are discussed.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Phase-shifting masks gain an edge

    Publication Year: 1993 , Page(s): 28 - 35
    Cited by:  Papers (2)  |  Patents (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (746 KB)  

    The potential, working principles, and approaches in phase shifting masks for optical lithography are discussed. The tradeoffs of each approach, and fabrication, inspection, repair, and tolerances are considered. It is feasible to use the phase shifting technology to improve optical lithography to 0.18- mu m feature size with k/sub 1/=0.35, lambda =248 nm, and NA=0.5. Further resolution improvements are still possible, but much development is required for making phase shifting masks a manufacturing reality.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Duty-cycle control boosts DC-DC converters

    Publication Year: 1993 , Page(s): 36 - 37
    Cited by:  Papers (15)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (163 KB)  

    An improved design for a switched-capacitor pulsewidth modulated (PWM) DC-DC converter with adjustable conversion ratios is presented. The converter provides a nominal power of 40 W and nominal voltage conversion ratio of 12/5. The same structure can provide other conversion ratios, as required. Such low power supplies use relatively small, low-value capacitors, and could conceivably be realized with IC technology.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Designer's casebook-simple current source is independent of V/sub BE(ON)/

    Publication Year: 1993
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (285 KB)  

    The design of a bipolar current mirror in which the exact value of V/sub BE(ON) /is not known is discussed.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

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.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Dr. Ronald W. Waynant
r.waynant@ieee.org