## Diode Logic Circuit

Tuesday, September 21, 2010

**In DL (diode logic),**all the logic is implemented using diodes and resistors. One basic thing about the diode, is that diode needs to be forward biased to conduct. Below is the example of a few DL logic circuits.

**Diode Logic Circuit**

When no input is connected or driven, output Z is low, due to resistor R1. When high is applied to either X or Y, or both X and Y are driven high, the corresponding diode get forward biased and thus conducts. When any diode conducts, output Z goes high.

Points to PonderDiode Logic suffers from voltage degradation from one stage to the next.

Diode Logic only permits OR and AND functions.

Diode Logic is used extensively but not in integrated circuits.