Twenty Rows' 2012 Cabernet Sauvignon was harvested in mid-to-late October from appelations across Napa Valley including Mt. Veeder, Coombsville, and Oak Knoll. The Cabernet Sauvignon fruit also includes 4% Petite Verdot, 4% Cabernet Franc, and 2% Malbec.
Zener diode is a diode which is used in its break down region. The diode is kept reverse biased in a circuit, and so it does not allow current to pass until the voltage is greater than the breakdown voltage of the zener.
A tunnel diode is a two-terminal device with an n-type semiconductor acting as cathode and a p-type semiconductor acting as anode. It is heavily doped, which in turn creates a narrow depletion zone like a Zener diode. The current-voltage characteristic of a tunnel diode has a strong non-linear nature, as well as a negative differential resistance region. Two distinct advantages of tunnel diodes are longevity and very high speed.