Back diode: Difference between revisions
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A '''Back diode''' or '''Backward diode''' is a [[tunnel diode]] that has better conduction for small reverse biases (typically –0.1 to –0.6 V) than for forward bias voltages. | [[File:BD4 characteristic.png|thumb|400px|right|Characteristics of a [[BD4]] back diode]] | ||
A '''Back diode''' or '''Backward diode''' is a [[tunnel diode]] that has better | |||
conduction for small reverse biases (typically –0.1 to –0.6 V) than for forward bias voltages. | |||
Compared to a typical tunnel diode, one side of the junction is less heavily doped than the other, | |||
leading to a reduced effect of tunneling in the forward direction (a much less prominent negative resistance area). | |||
In the reverse direction, there is strong conduction at very low voltages already. | |||
Among other purposes, it can be used as a rectifier for small signals, | |||
and will work at very high frequencies (50+ GHz) due to the absence of charge storage. | |||
When used as a rectifier, the reverse direction is used to conduct, whereas the forward direction blocks current flow for small signals (see diagram). | |||
This use which is "backward" from how a normal diode would rectify a signal has given the back diode its name. | |||
Examples of back diodes include: | Examples of back diodes include: | ||
| Line 8: | Line 17: | ||
==Links== | ==Links== | ||
[[wikipedia:Backward diode|Backward diode]] @ Wikipedia | * [[wikipedia:Backward diode|Backward diode]] @ Wikipedia | ||
* [https://www.electronics-notes.com/articles/electronic_components/diode/backward-diode.php Backward diode @ electronics-notes.com] | |||
* Tunnel diode switching circuits and the back diode. Service Scope [[Media:Service Scope 38 Jun 1966.pdf | No. 38, June 1966]] and [[Media:Service Scope 39 Aug 1966.pdf | No. 39, August 1966]] | |||
* [[Russian tunnel diodes#Back_diodes|Russian back diodes]] | |||
<gallery> | <gallery> | ||
BD1 to BD7 data.png | 1963 RCA Tunnel Diode Manual p14.png | Back diode in 1963 RCA Tunnel Diode Manual ("tunnel rectifier") | ||
BD1 to BD7 data.png | RCA BD-1 to BD-7 data | |||
</gallery> | </gallery> | ||
[[Category:Tunnel diodes]] | [[Category:Tunnel diodes]] | ||
Latest revision as of 03:53, 14 February 2019
A Back diode or Backward diode is a tunnel diode that has better conduction for small reverse biases (typically –0.1 to –0.6 V) than for forward bias voltages.
Compared to a typical tunnel diode, one side of the junction is less heavily doped than the other, leading to a reduced effect of tunneling in the forward direction (a much less prominent negative resistance area). In the reverse direction, there is strong conduction at very low voltages already.
Among other purposes, it can be used as a rectifier for small signals, and will work at very high frequencies (50+ GHz) due to the absence of charge storage. When used as a rectifier, the reverse direction is used to conduct, whereas the forward direction blocks current flow for small signals (see diagram). This use which is "backward" from how a normal diode would rectify a signal has given the back diode its name.
Examples of back diodes include:
Links
- Backward diode @ Wikipedia
- Backward diode @ electronics-notes.com
- Tunnel diode switching circuits and the back diode. Service Scope No. 38, June 1966 and No. 39, August 1966
- Russian back diodes
-
Back diode in 1963 RCA Tunnel Diode Manual ("tunnel rectifier")
-
RCA BD-1 to BD-7 data
