threshold switch

threshold switch

[′thresh‚hōld ‚swich]
(electronics)
A voltage-sensitive alternating-current switch made from a semiconductor material deposited on a metal substrate; when the alternating-current voltage acting on the switch is increased above the threshold value, the number of free carriers present in the semiconductor material increases suddenly, and the switch changes from a high resistance of about 10 megohms to a low resistance of less than 1 ohm; in other versions of this switch, the threshold voltage is controlled by heat, pressure, light, or moisture.
References in periodicals archive ?
The high sensitivity of both switches means weaker magnets can be employed or detection distances extended; the switches typical operating threshold switch point is A35G.
The companies are calling the thin film selector an Ovonic Threshold Switch (OTS), which acts like a resister between the stacked layers of PCM chips.
ECD Ovonics' proprietary advanced information technologies include Ovonic phase-change electrical memory, Ovonic phase-change optical memory and the Ovonic Threshold Switch.
ECD Ovonics' proprietary advanced information technologies include Ovonic(TM) phase-change electrical memory, Ovonic(TM) phase-change optical memory, and the Ovonic(TM) Threshold Switch.