Definition of pinch-off in English:

pinch-off

noun

Electronics
  • In a field-effect transistor: the meeting of the two non-conducting depletion layers that border the channel, such that little further increase in current is achieved by increasing the drain voltage.

Origin

1950s. From to pinch off.

Pronunciation

pinch-off

/ˈpɪn(t)ʃɒf/