Step recovery diode
A step recovery diode (SRD)is a semiconductor junction diode having the ability to generate extremely short pulses. It is also called snap-off diode or charge-storage diode or memory varactor, and has a variety of uses in microwave electronics as pulse generator or parametric amplifier.
When diodes switch from forward conduction to reverse cut-off, a reverse current flows briefly as stored charge is removed. It is the abruptness with which this reverse current ceases which characterises the step recovery diode.
See https://en.wikipedia.org/wiki/Step_recovery_diode
- http://w140.com/ge_transistor_manual_1964-ch17_snap.pdf
- http://w140.com/ge_transistor_manual_1964-snap_diode_specs.pdf