.What is the fundamental goal in Device modeling?

.What is the fundamental goal in Device modeling?
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1 Answer

Answer :

To obtain the functional relationship among the terminal electrical variables of the
device that is to be modeled.
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Related questions

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Description : What is pull up device?

Last Answer : A device connected so as to pull the output voltage to the upper supply voltage usually VDD is called pull up device.

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Description : .What is pull down device?

Last Answer : A device connected so as to pull the output voltage to the lower supply voltage usually 0V is called pull down device.

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Last Answer : The Device that conduct with zero gate bias.

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Last Answer : Explanation (2) Diagram (2) Operation (4)

Explain the silicon semiconductor fabrication process.

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explain with neat diagrams the various CMOS fabrication

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Last Answer : An antifuse is normally high resistance (>100M ). On application of appropriate programming voltages, the antifuse is changed permanently to a low-resistance structure (200-500 ).

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What are two components of Power dissipation.

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Last Answer : Fall time, f is the time taken for a waveform to fall from 90% to 10% of its steady-state value.

Define Rise time

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Last Answer : Rise time, r is the time taken for a waveform to rise from 10% to 90% of its steady-state value.

What is Latch – up?

Description : What is Latch – up?

Last Answer : Latch up is a condition in which the parasitic components give rise to the establishment of low resistance conducting paths between VDD and VSS with disastrous results. Careful control during fabrication is necessary to avoid this problem.

.What is Channel-length modulation?

Description : .What is Channel-length modulation?

Last Answer : The current between drain and source terminals is constant and independent of the applied voltage over the terminals. This is not entirely correct. The effective length of the conductive channel is ... depletion region at the drain junction to grow, reducing the length of the effective channel.

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Compare between CMOS and bipolar technologies.

Description : Compare between CMOS and bipolar technologies.

Last Answer : o CMOS Technology Bipolar technology o Low static power dissipation o High input impedance (low drive current) o Scalable threshold voltage o High noise margin o High packing density o High delay sensitivity to load (fanout limitations) o Low output drive current o Low gm (gm Vin)

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Last Answer : _ n-diffusion _ p-diffusion _ Polysilicon _ Metal

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Last Answer : _ Cutoff region _ Non- Saturated Region _ Saturated Region

Why NMOS technology is preferred more than PMOS technology?

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Last Answer : N- channel transistors has greater switching speed when compared tp PMOS

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Last Answer : Transistors with Channel length less than 3- 5 microns are termed as Short channel devices. With short channel devices the ratio between the lateral & vertical dimensions are reduced.

What are the advantages of CMOS process?

Description : What are the advantages of CMOS process?

Last Answer : Low Input Impedance Low delay Sensitivity to load.

What are the advantages of CMOS process?

Description : What are the advantages of CMOS process?

Last Answer : Low power Dissipation High Packing density Bi directional capability

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Last Answer : _ N Collector area _ Buried Sub collector (SCCD) _ Processing steps in CMOS process

What is BiCMOS Technology?

Description : What is BiCMOS Technology?

Last Answer : It is the combination of Bipolar technology & CMOS technology.

What are the advantages of Silicon-on-Insulator process?

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Last Answer : _ No Latch-up _ Due to absence of bulks transistor structures are denser than bulk silicon.

.What are the steps involved in twin-tub process?

Description : .What are the steps involved in twin-tub process?

Last Answer : Tub Formation _ Thin-oxide Construction _ Source & Drain Implantation _ Contact cut definition _ Metallization.

Give the different types of CMOS process?

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When the channel is said to be pinched –off?

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Last Answer : If a large Vds is applied this voltage with deplete the Inversion layer .This Voltage effectively pinches off the channel near the drain.

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What is the transistors CMOS technology provides?

Description : What is the transistors CMOS technology provides?

Last Answer : n-type transistors & p-type transistors.

.Different types of oxidation?

Description : .Different types of oxidation?

Last Answer : Dry & Wet Oxidation

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Description : What are the various Silicon wafer Preparation? _

Last Answer : Crystal growth & doping _ Ingot trimming & grinding _ Ingot slicing _ Wafer polishing & etching _ Wafer cleaning.

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Last Answer : _ Silicon wafer Preparation _ Epitaxial Growth _ Oxidation _ Photolithography _ Diffusion _ Ion Implantation _ Isolation technique _ Metallization _ Assembly processing & Packaging

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Last Answer : _ More Specialized Circuits _ Application Specific Integrated Circuits(ASICs) _ Systems-On-Chips

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Last Answer : _ Size is less _ High Speed _ Less Power Dissipation

What are four generations of Integration Circuits?

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