Explain the operation of NMOS Enhancement transistor.

Last Answer : Silicon wafer Preparation (2) Epitaxial Growth (2) Oxidation (2) Photolithography (2) Diffusion(2) Ion Implantation (2) Isolation technique (2) Metallization (1) Assembly processing & Packaging (1)

Explain the latch up prevention techniques.

Description : Explain the latch up prevention techniques.

Last Answer : Definition (2) Explanation (2) Diagram (2)

explain with neat diagrams the various CMOS fabrication

Description : explain with neat diagrams the various CMOS fabrication

Last Answer : technology P-well process (4) N-well process (4) Silicon-On-Insulator Process (4) Twin- tub Process (4)

In similar sized NMOS and PMOS transistor, NMOS is ____ than PMOS

Description : In similar sized NMOS and PMOS transistor, NMOS is ____ than PMOS (A) Faster (B) Slower (C) Same speed (D) None of the above

Last Answer : In similar sized NMOS and PMOS transistor, NMOS is Faster than PMOS

What is an antifuse?

Description : What is an antifuse?

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 ).

What are the different methods of programming of PALs?

Description : What are the different methods of programming of PALs?

Last Answer : The programming of PALs is done in three main ways: Fusible links UV – erasable EPROM EEPROM (E2PROM) – Electrically Erasable Programmable ROM

What are two components of Power dissipation.

Description : What are two components of Power dissipation.

Last Answer : There are two components that establish the amount of power dissipated in a CMOS circuit. These are: i) Static dissipation due to leakage current or other current drawn continuously from ... Dynamic dissipation due to - Switching transient current - Charging and discharging of load capacitances.

Define Delay time

Description : Define Delay time

Last Answer : Delay time, d is the time difference between input transition (50%) and the 50% output level. This is the time taken for a logic transition to pass from input to output.

Define Fall time

Description : Define Fall time

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

Description : Define Rise time

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.

What is Body effect?

Description : What is Body effect?

Last Answer : The threshold volatge VT is not a constant w. r. to the voltage difference between the substrate and the source of MOS transistor. This effect is called substrate-bias effect or body effect.

Define Threshold voltage in CMOS?

Description : Define Threshold voltage in CMOS?

Last Answer : The Threshold voltage, VT for a MOS transistor can be defined as the voltage applied between the gate and the source of the MOS transistor below which the drain to source current, IDS effectively drops to zero.

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)

What are the different MOS layers?

Description : What are the different MOS layers?

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

What is pull up device?

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.

.What is pull down device?

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.

Define Short Channel devices?

Description : Define Short Channel devices?

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 is the fundamental goal in Device modeling?

Description : .What is the fundamental goal in Device modeling?

Last Answer : To obtain the functional relationship among the terminal electrical variables of the device that is to be modeled.

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

What are the basic processing steps involved in BiCMOS process? Additional masks defining P base region

Description : What are the basic processing steps involved in BiCMOS process? Additional masks defining P base region

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?

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

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?

Description : Give the different types of CMOS process?

Last Answer : _ p-well process _ n-well process _ Silicon-On-Insulator Process _ Twin- tub Process

When the channel is said to be pinched –off?

Description : When the channel is said to be pinched –off?

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.

What is Depletion mode Device?

Description : What is Depletion mode Device?

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

What are the different layers in MOS transistors?

Description : What are the different layers in MOS transistors?

Last Answer : Drain , Source & Gate

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

What are the various Silicon wafer Preparation? _

Description : What are the various Silicon wafer Preparation? _

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

Give the basic process for IC fabrication

Description : Give the basic process for IC fabrication

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

.Give the variety of Integrated Circuits?

Description : .Give the variety of Integrated Circuits?

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

Give the advantages of IC?

Description : Give the advantages of IC?

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

What are four generations of Integration Circuits?

Description : What are four generations of Integration Circuits?

Last Answer : SSI (Small Scale Integration) _ MSI (Medium Scale Integration) _ LSI (Large Scale Integration) _ VLSI (Very Large Scale Integration)

What is enhancement mode operation of MOS?

Description : What is enhancement mode operation of MOS?

Last Answer : If the region beneath the gate is left initially uncharged the gate field must induce a Channel before current can flow. Thus the gate voltage enhances the channel current and such a device is said to operate in the enhancement mode.

Describe the operation of N channel enhancement type MOSFET with diagram.

Description : Describe the operation of N channel enhancement type MOSFET with diagram.

Last Answer : As its name indicates, this MOSFET operates only in the enhancement mode and has no depletion mode. It operates with large positive gate voltage only. It does not conduct when the ... of charge carriers attracted to the positive gate. Thus drain current is controlled by the gate potential.

Which technology speed faster and higher density: a. PMOS b. NMOS c. HMOS d. All the above

Description : Which technology speed faster and higher density: a. PMOS b. NMOS c. HMOS d. All the above

Last Answer : a. PMOS

NMOS stands for: a. N-channel metal-oxide-semiconductor b. P-channel metal-oxide-semiconductor c. N-channel memory-oxide-semiconductor d. All the above

Description : NMOS stands for: a. N-channel metal-oxide-semiconductor b. P-channel metal-oxide-semiconductor c. N-channel memory-oxide-semiconductor d. All the above

Last Answer : a. N-channel metal-oxide-semiconductor

What are the advantages of CMOS over NMOS?

Description : What are the advantages of CMOS over NMOS?

Last Answer : Advantages of CMOS technology over NMOS are as follows. Very low static power consumption Reduce the complexity of the circuit High density of logic functions on a chip Low static power consumption High noise immunity

Explain the operation of transistor as a switch and as an amplifier, with neat circuit diagrams.

Description : Explain the operation of transistor as a switch and as an amplifier, with neat circuit diagrams.

Last Answer : Explanation of transistor as a switch: The transistor can be used for two types of application viz. amplification and switching. For the amplification, transistor is biased in its active region. ... results in a large output voltage, which shows that the transistor works as an amplifier.

Draw construction of SCR using two transistor model. Explain its operation.

Description : Draw construction of SCR using two transistor model. Explain its operation.

Last Answer : Two Transistor Model of SCR or Thyristor

What are the four classes of operation of a transistor amplifier?

Description : What are the four classes of operation of a transistor amplifier?

Last Answer : A, AB, B, C.

For normal operation of a transistor, the collector base junction is kept (a) Unbiased (b) forward biased (c) reverse biased (d) none

Description : For normal operation of a transistor, the collector base junction is kept (a) Unbiased (b) forward biased (c) reverse biased (d) none

Last Answer : (c) reverse biased

anonymous · Answer 1 · 2021-08-15T13:34:01+0000

Answer :

Explanation (2)
Diagram (2)
Operation (4)

answered Aug 15, 2021 by anonymous

Explain the operation of NMOS Enhancement transistor.

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