noun
tunnel diode
A semiconductor diode that uses quantum tunneling to achieve negative resistance; used in high-frequency oscillators and amplifiers.
トンネルダイオードは高速スイッチング回路に使われる。
Tunnel diodes are used in high-speed switching circuits.
Variant with interpunct, sometimes used for clarity.
From English 'tunnel diode', referring to the quantum tunneling effect that enables its operation.