abrupt junction

abrupt junction

[ə′brəpt ′jəŋk·shən]
(electronics)
A pn junction in which the concentration of impurities changes suddenly from acceptors to donors.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Left: A few layers of epithelium are noted, lacking a palisading of the nuclei and showing an abrupt junction with the surrounding fibrous tissue.
Seen from the St Martin's side, its sinuous curves and metallic cladding strike visual sparks off the refurbished church ("Spettacolare!" I overheard one camera-wielding Italian tourist exclaim) but on the south side its looming mass does not encourage pedestrians to linger and seen from the Moor Street side its abrupt junction with the rest of the Bullring development, like a sliced Swiss roll, raises the question whether it is really a building at all.
With an abrupt junction, the transfer is carried out suddenly.
Basically, the quality of abrupt junction crossings is significantly better than that of hyperabrupt crossings.
MMICAD then can plot a typical abrupt junction varactor diode C-V curve, which can then be used in an actual oscillator circuit to see the degree of nonlinearity that it produces.
Additionally, the analysis of a frequency doubler is the most straightforward and closed form solutions are often possible, that is those for the abrupt junction diode.
A simple and approximate model for the abrupt junction varactor diode is shown in Figure 3.
A detailed analysis for abrupt junction multipliers, including frequency doublers, has been performed [1] to establish performance limits and operating impedance levels in terms of basic device parameters.
An abrupt junction varactor diode that has parameters suitable for delivering 0.25 W of output power in a 22 to 44 GHz frequency doubler circuit is identified in Table 1.
For an abrupt junction varactor, the junction capacitance [C.sub.j] is related to the applied bias voltage V by (12) [Mathematical Expression Omitted] Where [C.sup.1] is the junction capacitance with zero bias voltage.