User:John R. Brews

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I am a Professor Emeritus of Electrical Engineering from The University of Arizona, where I taught device physics and circuit design for just under two decades. Previously, I was a research scientist for twenty-odd years at Bell Laboratories, Murray Hill, doing theoretical work in the areas of solid-state physics and device physics. I also am a Fellow of the IEEE, and a recipient of the Electron Device Society distinguished service award for work as Editor-in-chief of the journal IEEE Electron Device Letters, founded by Nobel prize winner George E. Smith. I've published a number of technical books and papers, some of which may be found at this link.

Images

Magnetism

(CC) Image: John R. Brews B-field lines near uniformly magnetized sphere     (CC) Image: John R. Brews Magnetic flux density vs. magnetic field in steel and iron

Widlar current source

(CC) Image: John R. Brews Widlar current source using bipolar transistors     (CC) Image: John R. Brews Small-signal circuit for finding output resistance of the Widlar source     (CC) Image: John R. Brews Design trade-off between output resistance and output current in Widlar source

Forces

(CC) Image: John R. Brews Force and its equivalent force and couple

Electromagnetism

(CC) Image: John R. Brews Electric motor using a current loop in a magnetic flux density, labeled B

Devices

(PD) Image: John R. Brews A modern MOSFET     (CC) Image: John R. Brews Calculated density of states for crystalline silicon.     (CC) Image: John R. Brews Field effect: At a gate voltage above threshold a surface inversion layer of electrons forms at a semiconductor surface.     (PD) Image: John R. Brews Occupancy comparison between n-type, intrinsic and p-type semiconductors.     (PD) Image: John R. Brews Nonideal pn-diode current-voltage characteristics     (PD) Image: John R. Brews Band-bending diagram for pn-junction diode at zero applied voltage     (PD) Image: John R. Brews Band-bending for pn-diode in reverse bias [[Image:Quasi-Fermi levels in reverse-biased pn-junction diode border|200x200px|Pn-junction forward bias.PNG]]     Pn-junction forward bias.PNG [[Image:Band-bending diagram for pn-diode in forward bias border|200x200px|Fermi function.PNG]]     Fermi function.PNG [[Image:Fermi occupancy function vs. energy departure from Fermi level in volts for three temperatures border|200x200px|FCC Fermi surface.PNG]]     FCC Fermi surface.PNG [[Image:Fermi surface in k-space for a nearly filled band in the face-centered cubic lattice border|200x200px|]]