First op amps built in 1930’s-1940’s Technically feedback amplifiers due to only having one useable input Used in WW-II to help how to strike military targets Buffers, summers, differentiators, inverters Took ±300V to ± 100V to power

1. INTEGRATED CIRCUITS
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2. 2
INTEGRATED CIRCUITS
In electronics, an integrated circuit is a miniaturized
electronic circuit (semiconductor devices, as well
as passive components) that has been
manufactured in the surface of a thin substrate of
semiconductor material.
Integrated circuits are used in almost all electronic
equipment in use today and have revolutionized
the world of electronics.

3. 3
 First op amps built in 1930’s-1940’s
 Technically feedback amplifiers due to
only having one useable input
 Used in WW-II to help how to strike
military targets
 Buffers, summers, differentiators,
inverters
 Took ±300V to ± 100V to power
http://en.wikipedia.org/wiki/Image:K2-w_vaccuum_tube_op-amp.jpg1
History

4. 4
History
 Vacuum Tube Era, 1950s
 1st used in Analog Computers
 Addition
 Subtraction
 Integration
 Differentiation
 Heavy
 $$$
 Prone to failure
Analog Computer
K2-W tubes general purpose
Op-Amp. 1952

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IC Fabrication Technology: Brief History
 1940s - setting the stage - the initial inventions that made
integrated circuits possible.
 In 1945, Bell Labs established a group to develop a
semiconductor replacement for the vacuum tube. The group
led by William Shockley, included, John Bardeen, Walter
Brattain and others.
 In 1947 Bardeen and Brattain and Shockley succeeded in
creating an amplifying circuit utilizing a point-contact
"transfer resistance" device that later became known as a
transistor.
 In 1951 Shockley developed the junction transistor, a more
practical form of the transistor.
 By 1954 the transistor was an essential component of the
telephone system and the transistor first appeared in
hearing aids followed by radios.

6. The transistor invented at Bell lab. in
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1947
In 1956 the importance of the invention of the transistor by Bardeen, Brattain and
Shockley was recognized by the Nobel Prize in physics.

7. 7 First Point Contact Transistor and Testing Apparatus (1947)

8. 8
1958 - Integrated circuit invented
September 12th 1958 Jack Kilby at Texas instrument had
built a simple oscillator IC with five integrated components
(resistors, capacitors, distributed capacitors and
transistors)
In 2000 the importance of the IC was recognized when
Kilby shared the Nobel prize in physics with two others.
Kilby was sited by the Nobel committee "for his part in the
invention of the integrated circuit ”

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1959 - Planar technology invented
 Kilby's invention had a serious
drawback, the individual circuit
elements were connected
together with gold wires
making the circuit difficult to
scale up to any complexity.
 The metal layer connected
down to the junctions through
the holes in the silicon dioxide
and was then etched into a
pattern to interconnect the
circuit. Planar technology set
the stage for complex
integrated circuits and is the
process used today.
Planar technology
Lecture #1

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IC Fabrication Technology: History (cont.)
 1960 - Epitaxial deposition developed
 Bell Labs developed the technique of Epitaxial Deposition whereby a
single crystal layer of material is deposited on a crystalline substrate.
Epitaxial deposition is widely used in bipolar and sub-micron CMOS
fabrication.
 1960 - First MOSFET fabricated
 Kahng at Bell Labs fabricates the first MOSFET.
 1961 - First commercial ICs
 Fairchild and Texas Instruments both introduce commercial ICs.
 1962 - Transistor-Transistor Logic invented
 1962 - Semiconductor industry surpasses $1-billion in sales
 1963 - First MOS IC

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History
 1964 – Bob Widlar designs the first op-amp: the 702.
 Using only 9 transistors, it attains a gain of over 1000
 Highly expensive: $300 per op-amp
 1965 – Bob Widlar designs the 709 op-amp which
more closely resembles the current uA741
 This op-amp achieves an open-loop gain of around 60,000.
 The 709’s largest flaw was its lack of short circuit protection.

12. History
 After Widlar left Fairchild, Dave Fullagar continued op-amp
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design and came up with the uA741 which is the
most popular operational amplifier of all time.
 This design’s basic architecture is almost identical to Widlar’s
309 op-amp with one major difference: the inclusion of a
fixed internal compensation capacitor.
 This capacitor allows the uA741 to be used without any additional,
external circuitry, unlike its predecessors.
 The other main difference is the addition of extra transistors
for short circuit protection.
 This op-amp has a gain of around 250,000

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ADVANTAGES OF IC’S
 SMALL SIZE
 LOW COST
 IMPROVED PERFORMANCE
 HIGH RELIABILITY AND RUGGEDNESS
 LOW POWER CONSUMPTION
 LESS AFFECTED TO PARAMETER VARIATION
 EASY TROUBLESHOOTING
 INCREASED OPERATING SPEED
 LESS WEIGHT,VOLUME
 EASY REPLACEMENT

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DISADVANTAGES OF IC’S
 AS IC IS SMALL IN SIZE ITS UNABLE TO
DISSIPATE LARGE AMOUNT OF POWER.
INCREASE IN CURRENT MAY PRODUCE
ENOUGH HEAT WHICH MAY DESTROY THE
DEVICE.
 AT PRESENT COILS, INDUCTORS AND
TRANSFORMERS CAN NOT BE PRODUCED IN
IC FORM.

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CLASSIFICATION OF IC’S
On the basis of fabrication techniques used
On the basis of the chip size
On the basis of applications

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ON BASIS OF FABRICATION
Monolithic IC’s
Hybrid or Multi-chip ICs.
Thin and Thick Film IC’s.

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MONOLITHIC IC’S
Monolithic circuit is built into a
single stone or single crystal i.e. in
monolithic ICs, all circuit
components, and their
interconnections are formed into or
on the top of a single chip of silicon.
Monolithic ICs are by far the most
common type of ICs used in
practice, because of mass
production , lower cost and higher
reliability.

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HYBRID IC’S
The circuit is fabricated by
interconnecting a number of
individual chips.
Hybrids ICs are widely used for high
power audio amplifier applications .
Have better performance than
monolithic ICs
Process is too expensive for mass
production

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THIN AND THICK FILM IC’S
These devices are larger than
monolithic ICs but smaller than
discrete circuits. These ICs can be
used when power requirement is
comparatively higher.
With a thin-or thick-film IC, the
passive components like resistors
and capacitors are integrated, but the
transistors and diodes are connected
as discrete components to form a
complete circuit.

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THIN AND THICK FILM IC’S
 The essential difference between the thin- and thick-film
ICs is not their relative thickness but the method
of deposition of film.
 In thick film type the resistors and interconnection
patterns are printed on a ceramic substrate.
 In thin film type the resistors and interconnection
patterns are deposited by vacuum evaporation
technique on a glass or glazed ceramic substrate.
 Both have similar appearance, properties and general
characteristics.

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ON BASIS OF CHIP SIZE
SSI (small-scale integration)
MSI (medium-scale integration)
LSI (large-scale integration)
VLSI (very large-scale integration)
ULSI (ultra large-scale integration)

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SSI AND MSI
Small scale integration (SSI) has
3 to 30 gates/chip or Up to 100
electronic components per chip
Medium scale integration (MSI)
has 30 to 300 gates/chip or
100 to 3,000 electronic
components per chip

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LSI AND VLSI
Large scale integration (LSI)-300 to
3,000 gates/chip or 3,000 to 100,000
electronic components per chip.
Very large scale integration (VLSI)-
more than 3,000 gates/chip or 100,000
to 1,000,000 electronic components per
chip

24. 26
ULSI
Ultra Large-Scale Integration
(ULSI)- More than 1 million
electronic components per chip
The Intel 486 and Pentium
microprocessors, for example, use
ULSI technology. The line between
VLSI and ULSI is vague.

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ON BASIS OF APPLICATIONS
LINEAR INTEGRATED CIRCUITS
DIGITAL INTEGRATED CIRCUITS

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DIGITAL INTEGRATED
CIRCUITS
When the circuit is either in on-state
or off-state and not in between the
two, the circuit is called the digital
circuit. ICs used in such circuits are
called the digital ICs. They find
wide applications in computers and
logic circuits.
Example logic gates, flip flops,
counters, microprocessors, memory
chips etc.

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LINEAR INTEGRATED
CIRCUITS
When the input and output relationship
of a circuit is linear, linear ICs are used.
Input and output can take place on a
continuous range of values.
Example operational amplifiers, power
amplifiers, microwave amplifiers
multipliers etc.

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Op-amp ID code.
Prefix Designator Suffix
LM 741C N
Prefix Manufacturer
AD/OP Analog Devices
CA/HA Harris
KA Fairchild
LM National Semiconductor
MC ON Semiconductor
NE/SE Signetics
OPA Burr-Brown
RC/RM Raytheon
SG Silicon General
TI Texas Instruments
Code Application Temp.(°C)
C Commercial 0 to 70
I Industrial -25 to 85
M Military -55 to 125
Code Package Type
D,VD Surface mount package
J Ceramic dual-in-line (DIP)
N,P,VP Plastic DIP
DM Micro SMP