Introduction to Logic Families Video Lecture | Digital Electronics - Electrical Engineering (EE)

in this video I will talk about digital
logic family I will show you the
classification of period digital logic
families if you ever work with digital
logic circuits
you may familiar with and NAND or
exclusive or nor and inverter gates the
gears are known as no the case you are
also familiar with different flip-flops
for example here we have our s cliff
flop using nine decades
you may also familiar with JK D P and
master slab 50 lakhs
you may also familiar with different
types of memory devices those logic
gates and memory devices are replicated
as integrated circuits or I see for
example seven four three two this IC
indicates TTL and the case so if you
ever work with this integrated circuit
you have to ensure that you are working
with and case so what is this indicator
circuit and integrated circuit is a
small silicon semiconductor crystal
which is known as chip inside that tip
we will have various electrical
components like transistors the restores
diodes and capacitor C to specify the
logic levels in the digital circuits we
use binary signals that means we have to
deal with two different logic levels
like metal 0 or low level state or low
state another one is never long or high
state all the logic circuits are
available in different IC modules the IC
modules are classified into many
families and the families are known as
non-league families now I will show you
the classification of logic family
initially the logic families are
classified into two types according to
the use of transistors if we use bipolar
Junction transistors to build a solid
family that will be included in the
bipolar logic families if we use
unipolar transistor like field effect
transistor it will be included in
unipolar loris family
unipolar logic families can be further
classified into three types P type
enhancement MOSFET or PMO's n type
enhancement
better in moss or complimentary mosfet
or complementary
metal-oxide-semiconductor field-effect
transistor see if we use p-type
enhancement MOSFET or PMO's to build a
logic circuit the circuit will be any
unipolar circuit if we use in pipe
enhancement MOSFET to build a logic
circuit that will be also another
unipolar device
but if we use complementary MOSFET we
have to use at least one P type MOSFET
or PMO's and one in most to build the
complementary Mosca closet now let me
show you the classification of bipolar
logic families a bipolar Junction
transistor has three different regions
of operation saturation region
active region and cutoff region based on
the region of operation the bipolar
logic families can further classified
into two types saturated logic families
and non-saturated noisy families
non-saturated knowledge that means the
bipolar Junction transistor will operate
either in the cutoff mode or in the
active region usually the non-saturated
logic circuits are faster than the
saturated logic circuits during the
operation of non-saturated logic of a
transistor we not saturate the
non-saturated logic is further
classified into two types short key TTL
and ECL if u L that means
emitter-coupled logic I will show you
the operation of ECL inverter circuit
and ECL norm and or gate short critical
that means short key transistor
transistor logic now let me show you the
classification of saturated logic
saturated logic here we will get various
categories of logic circuits RTL at any
store transistor logic TTL
diode transistor logic be CTL direct
coupled transistor logic I square L or
integrated index emilich this is also
known as I I in all these family HDL
high threshold Babak
TTL transistor transistor logic this
transistor transistor Blasi or TTL logic
family is the widely used logic family
and you will get the application of TTL
logic family in seven for IC series
usually the transistors on this topic
circuit held three output structure one
is known as totem pole structure
take a look one is known as open
collector structure and the third one is
known as high impedance state
or try stead of the circuit okay that's
it thank you