unijunctionn.

Forms: Also uni-junction.

Etymology: uni- comb. form 1b.Previous versions of the OED give the stress as: ˈunijunction.

Electronics.

A negative-resistance device consisting of a rectifying p–n junction in the middle of a length of semiconducting material that has an ohmic contact at each end, used as a switching element.

ΘΚΠ

the world > matter > physics > solid state physics > semiconductivity > [noun] > transition zone

junction1949

p–n junction1949

unijunction1957

varactor1959

heterojunction1960

homojunction1960

varicap1967

semiconductor junction1975

1957 Automatic Control Feb. 24 The silicon unijunction transistor has characteristics resembling a neon light; it can be wired to a capacitor and a resistor to yield an oscillator.

1962 J. H. Simpson & R. S. Richards Physical Princ. Junction Transistors viii. 192 A device whose regenerative property is obtained in a somewhat different manner..is the uni-junction transistor or double-based diode.

1981 L. Nashelsky & R. L. Boylestad Devices vii. 291 Recent interest in the unijunction transistor (UJT) has, like that for the SCR, been increasing at an exponential rate.

This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020).

单词	unijunction
释义	unijunctionn. Forms: Also uni-junction. Etymology: uni- comb. form 1b.Previous versions of the OED give the stress as: ˈunijunction. Electronics. A negative-resistance device consisting of a rectifying p–n junction in the middle of a length of semiconducting material that has an ohmic contact at each end, used as a switching element. ΘΚΠ the world > matter > physics > solid state physics > semiconductivity > [noun] > transition zone junction1949 p–n junction1949 unijunction1957 varactor1959 heterojunction1960 homojunction1960 varicap1967 semiconductor junction1975 1957 Automatic Control Feb. 24 The silicon unijunction transistor has characteristics resembling a neon light; it can be wired to a capacitor and a resistor to yield an oscillator. 1962 J. H. Simpson & R. S. Richards Physical Princ. Junction Transistors viii. 192 A device whose regenerative property is obtained in a somewhat different manner..is the uni-junction transistor or double-based diode. 1981 L. Nashelsky & R. L. Boylestad Devices vii. 291 Recent interest in the unijunction transistor (UJT) has, like that for the SCR, been increasing at an exponential rate. This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020). < n.1957
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