Tunneldiode
En tunneldiode eller Esaki-diode er en diode som på en lille del af sin overføringsfunktion har en negativ differentiel modstand. Leo Esaki opdagede diodetypen i 1957, heraf navnet Esaki-diode. [2]
Forspændes en tunneldiode til at arbejde, hvor den har negativ modstandskarakteristik, vil den f.eks. kunne ophæve en svingningskreds tabsmodstand og derved forstærke, så resultatet er en tunneldiode oscillator[3][4], en superregenerative modtager - eller tunneldiode forstærker.[5][6]
Kilder/henvisninger
 |
Wikimedia Commons har medier relateret til: |
- ^ rf-microwave.com: Datablad 1N3716
- ^ jspsusa.org: The Global Reach of Japanese Science Speaker: Leo Esaki Citat: "...This environment stimulated me, encouraged me, and eventually lead me to my thesis work of the Esaki Tunnel Diode in 1957...the root of this development was the tunnel diode, which I made in 1957..."
- ^ clarku.edu: Tunnel Diode Oscillator Essentials. Chuck Agosta - Clark University Citat: "...The tunnel diode oscillator (TDO) is a highly stable self resonating oscillator system that we use to measure rf penetration depth in conducting, superconducting, and magnetic materials...", backup
- ^ 1999, arxiv.org: Radio-frequency impedance measurements using a tunnel-diode oscillator (TDO)technique, backup
- ^ C. T. Munsterman. Tunnel-Diode Microwave Amplifiers, backup
- ^ Aertech Industries, Brooke Clarke: Tunnel Diode Amplifiers Citat: "...The TD amplifier combines a TD operating in the negative resistance region with a matching circuit and a circulator to separate the incident and reflected waves. Since the isolation of a single junction circulator is around 20 dB the gain of each stage needs to be less than that to prevent oscillations...", backup
Se også
- Lambda-diode
- Backward-diode
- Diode
- Josephson tunneldiode
- Resonanstunneldiode, RTD
- Kvantemekanisk tunnelering
Eksterne henvisninger
- 11 February 2004, isa.org: New, faster diode leads to next era of electronics Citat: "...Under the rules of quantum physics, an electron on one side of a barrier can travel through to the other side, "which would be like a tennis ball coming out the other side of a brick wall," said Paul Berger of Ohio State University in Columbus, Ohio..."
- By Nyle Steiner K7NS 2001. Hjemmelavede dimser med negativ modstandskarakteristikker:
- Ge Tunnel Diode Manual 1961