Question

: Use Emitter coupled logic(ECL) inverter to design a 3-input NAND.
Solve it step by step
Please;ues computer to Solve question no solve it by your hand because the The line is not clear

Answer 1

Emitter-coupled logic is a high-speed bipolar logic family. To get familiar with this logic, let’s examine an ECL inverter/buffer as shown in Figure 1. In this figure,
V
i
n
is the input of the gate,
V
o
u
t
−
is the inverted version of
V
i
n
and
V
o
u
t
+
is the complement of
V
o
u
t
−
. In this particular example,
V
o
u
t
+
can be considered as the buffered version of the input. Moreover,
V
B
B
is an appropriate voltage (4V in Figure 1). Let’s define the logic high and logic low as 4.4 V and 3.6 V, respectively,