View source for Step recovery diode

A '''step recovery diode (SRD)''' aka '''snap-off diode''' is a semiconductor junction diode having the ability to generate extremely short pulses.
It is also called a or a charge-storage diode, 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. 

In SRDs, doping levels are gradually reduced towards the PN junction to maximize the abruptness with which the reverse current ceases.

==See also==
* Wikipedia: [[wikipedia:Step recovery diode|Step recovery diode]]
* [[Patent US 3337779A]], ''Snap-off diode containing recombination impurities'' (f 1962 / g 1967)
* [https://www.hpmemoryproject.org/an/pdf/an_913.pdf HP Application Note 913 – Step Recovery Diode Frequency Multiplier Design] (1967)
* [https://www.hpmemoryproject.org/an/pdf/an_918.pdf HP Application Note 918 – Pulse and Waveform Generation with Step Recovery Diodes] (1967)
* [https://www.hpmemoryproject.org/an/pdf/an_920.pdf HP Application Note 920 – Harmonic Generation Using Step Recovery Diodes and SRD Modules] (1968)
* [[Media:GE Transistor Manual 1964 Ch.17 Snap-off Diodes.pdf|GE Transistor Manual 1964, Ch.17 – Snap-off Diodes]]
* [[Media:GE Transistor Manual 1964 Snap-off Diode specs.pdf|GE Transistor Manual 1964 – Snap-off Diode specs]]
* [[Media:Tek xref tunnel diodes.pdf|Tektronix Tunnel Diodes Crossreference]]

==Tek products using SRDs==

{| class="wikitable"
|-
! Product
! Diode(s) used
! Serial numbers
|-
| [[1502]] || [[152-0335-01]] ||
|-
| [[1503C]] || A4CR3040 [[152-0503-00]] (5082-8872)    ||
|-
| [[1S1]]   ||    ||
|- 
| [[1S2]]   ||    ||
|-
| [[3S1]]   ||    ||
|-
| [[3S3]]   || [[152-115]]     ||
|-
| [[4S1]]   ||    ||
|-
| [[4S2]]   || [[152-112]]     ||
|-
| [[4S2A]]  || [[152-0252-00]] ||
|-
| [[4S3]]   ||    ||
|-
| [[R293]]  ||    ||
|-
| [[284]]   ||    ||
|-
| [[3S76]]  || [[152-115]]     ||
|-
| [[S-1]]   ||    ||
|-
| [[S-2]]   || [[152-0335-01]] ||
|-
| [[S-3]]   || [[152-0368-00]] ||
|-
|rowspan="2"| [[S-4]]  || [[152-0335-00]] || <B060000 
|-
|                         [[152-0335-01]] ||   B060000+
|-
|rowspan="2"| [[S-6]]  || [[152-0335-00]] ||  B010100–B039999
|-
|                         [[152-0335-01]] ||  B040000+
|-
| [[S-42]]  ||    ||
|-
| [[S-52]]  ||    ||
|-
| [[TG501]] || [[152-0503-00]]    ||
|}

[[Category:Semiconductor components]]