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Refering to the circuit in Fig. (6.26) we see that there are eight different collector voltages and four different Diode anode voltages:

1) input darlington pair Q 1 and Q 2 correspond to one collector voltage,

2) input darlington pair Q 4 and Q 5 correspond to second collector voltage,

3) Q 6 , Q 8 and Q 12 correspond to the third voltage namely Vcc collector voltage since they are in CC (Common Collector) mode,

4) Q 3 , Q 7 , Q 10 , Q 11 , Q 13 correspond to fourth, fifth, sixth, seventh, and eighth collector voltages;

5) there are four different diode anode voltages corresponding to D 1 , D 2 , D 3 , D 4 .

Corresponding to these twelve different quiescent voltages which are Vcc or less but always greater than -V EE , we have twelve isolated islands as seen in Fig. (6.27) where each isolated island is marked by thick border lines.

The isolated islands containing Q 6 , Q 8 and Q 12 and connected to Vcc contains all resistances R 1 to R 11 and R X and R Y . Resistances are realized by an elongated strip of p diffusion and any point on the resistances is less than Vcc or at most Vcc. In order that resistances may be isolated from n epi layer and hence from one another, n epi layer i.e. the isolated island must be at most positive potential i.e. Vcc. Then only all resistances will be reverse biased with respect to the n epi layer.

Fig(6.26) Complete circuit diagram of MC 1530/31 chip, with the points of different contact pads marked

Fig(6.27) Twelve isolated islands and placement of transistors, diodes and resistors on the islands have been indicated. The detailed structure of the devices have not been given.

In Fig. (6.27) complete layout of MC-1530 is given. In the chip layout following are the contacts connected to the header leads:

Contact(a) connects substrate to contact(4) which is held at -V EE .______________________Contact(b) connects the isolated island containing resistances and CC transistors to contact(6) which is held at +Vcc._________________________________________________________________________________________________________Contact(1’) and (2’) are input connections for MC-1530, ___________________________________________Contact(1) and (2) are input connections for MC-1531__________________________________________________________Contact(5) is output,_________________________________________________________________________________________Contact(3) is ground,_________________________________________________________________________________________Contact(7) , (8), (9)and (10) are monitoring points at V B11 , V E8 , V C5 , V C1 respectively.

In MC 1530-31, each transistor and diode configuration of transistor contains buried layers. The epilayer is 0.5 Ω cm. This allows BV CEO to be 20V. But because of buried layer the collector series resistance (r sc ) or saturation resistance are less than 50Ω. Hence with V CC ± 9V, an output swing of 16V p-p is achieved without endangering the output transistors Q 13 , Q 12 and at the same time r sc does not affect the ability to drive loads down to 500Ω.

In the design of MC1530-31, the critical d.c. levels are kept a function of resistor ratios and not of absolute values. This is because in I.C. technology, diffused resistance ratios with much closer tolerance (typically 5 to 6 %) can be achieved as compared to the tolerance of absolute values (30 to 50 %). That is matching tolerance is much narrower than absolute tolerance. Therefore output d.c. level (V 0 ) is a function of only resistor ratios – not of the absolute value of any resistor or of the beta of any device of the circuit. V o is given by Eq.(6.5)

Questions & Answers

Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
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Jyoti Reply
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Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
yes that's correct
I think
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Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
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scanning tunneling microscope
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Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
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Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
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Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
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Introduction about quantum dots in nanotechnology
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Source:  OpenStax, Solid state physics and devices-the harbinger of third wave of civilization. OpenStax CNX. Sep 15, 2014 Download for free at http://legacy.cnx.org/content/col11170/1.89
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