Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
7th Edition
ISBN: 9780199339136
Author: Adel S. Sedra, Kenneth C. Smith
Publisher: Oxford University Press
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Chapter 5, Problem D5.7P
To determine
The device width Wof the N channel MOSFET for the given parameters.
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An N-channel MOSFET with N+-poly gate is fabricated on a 15 n. cm P-type Si wafer (a) Determine the flat-band voltage Vfb. (b) What is the threshold voltage, Vt? (c) A circuit designer requested N-MOSFET with Vt = 0.5 V from a device engineer. It was not allowed to change the gate oxide thickness. If you are the device engineer, what can you do? Give specific answer.; including what type of equipment to use.
(a) An n-channel MOSFET has a mobility of 600 cm2/V · s and a channel length of 1 μm. What is the transistor’s fT if VGS − VT N = 0.25 V. (b) Repeat for a PMOS device with a mobility of 250 cm2/V · s. (c) Repeat for transistors in a new technology with L = 0.1 μm. (d) Repeat for transistors in a technology with L = 25 nm.
Consider a non-ideal MOSFET that has been fabricated on a siliconwafer with initial uniform boron doping of 7.5 × 1015 cm-3. The gateoxide has a thickness tox = 35 nm, fixed charge Qf /q = 5.0 × 1010 cm-2and mobile charge Qm /q = 2.5 × 1010 cm-2 (assume other oxidecharges are negligibly small). The gate has been fabricated frompolysilicon to give a gate length of 150 nm. The work functiondifference between the polysilicon gate and the silicon is –0.35 V.Assuming a temperature of 300 K and ignoring short channel effects,calculate the threshold voltage of the MOSFET if there is zero biasapplied between the source and the silicon substrate.
Chapter 5 Solutions
Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
Ch. 5.1 - Prob. 5.1ECh. 5.1 - Prob. 5.2ECh. 5.1 - Prob. D5.3ECh. 5.2 - Prob. 5.4ECh. 5.2 - Prob. 5.5ECh. 5.2 - Prob. 5.6ECh. 5.2 - Prob. 5.7ECh. 5.3 - Prob. D5.8ECh. 5.3 - Prob. D5.9ECh. 5.3 - Prob. D5.10E
Ch. 5.3 - Prob. 5.11ECh. 5.3 - Prob. 5.12ECh. 5.3 - Prob. D5.13ECh. 5.3 - Prob. D5.14ECh. 5.3 - Prob. 5.15ECh. 5.4 - Prob. 5.16ECh. 5.4 - Prob. 5.17ECh. 5 - Prob. 5.1PCh. 5 - Prob. 5.2PCh. 5 - Prob. 5.3PCh. 5 - Prob. 5.4PCh. 5 - Prob. D5.5PCh. 5 - Prob. 5.6PCh. 5 - Prob. D5.7PCh. 5 - Prob. 5.8PCh. 5 - Prob. 5.9PCh. 5 - Prob. 5.10PCh. 5 - Prob. 5.11PCh. 5 - Prob. 5.12PCh. 5 - Prob. 5.13PCh. 5 - Prob. 5.14PCh. 5 - Prob. 5.15PCh. 5 - Prob. 5.16PCh. 5 - Prob. 5.17PCh. 5 - Prob. 5.18PCh. 5 - Prob. 5.19PCh. 5 - Prob. D5.20PCh. 5 - Prob. 5.21PCh. 5 - Prob. 5.22PCh. 5 - Prob. 5.23PCh. 5 - Prob. 5.24PCh. 5 - Prob. 5.25PCh. 5 - Prob. 5.26PCh. 5 - Prob. 5.27PCh. 5 - Prob. 5.28PCh. 5 - Prob. 5.29PCh. 5 - Prob. 5.30PCh. 5 - Prob. 5.31PCh. 5 - Prob. D5.32PCh. 5 - Prob. D5.33PCh. 5 - Prob. 5.34PCh. 5 - Prob. 5.35PCh. 5 - Prob. D5.36PCh. 5 - Prob. 5.37PCh. 5 - Prob. 5.38PCh. 5 - Prob. 5.39PCh. 5 - Prob. 5.40PCh. 5 - Prob. 5.41PCh. 5 - Prob. 5.42PCh. 5 - Prob. 5.43PCh. 5 - Prob. D5.44PCh. 5 - Prob. 5.45PCh. 5 - Prob. D5.46PCh. 5 - Prob. 5.47PCh. 5 - Prob. D5.48PCh. 5 - Prob. D5.49PCh. 5 - Prob. D5.50PCh. 5 - Prob. D5.51PCh. 5 - Prob. 5.52PCh. 5 - Prob. D5.53PCh. 5 - Prob. 5.54PCh. 5 - Prob. 5.55PCh. 5 - Prob. 5.56PCh. 5 - Prob. 5.57PCh. 5 - Prob. 5.58PCh. 5 - Prob. 5.59PCh. 5 - Prob. 5.60PCh. 5 - Prob. 5.61PCh. 5 - Prob. 5.62PCh. 5 - Prob. 5.63PCh. 5 - Prob. 5.64PCh. 5 - Prob. 5.65PCh. 5 - Prob. 5.66PCh. 5 - Prob. 5.67P
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- 5.1 A 0.18-um fabrication process is specified to have t = 4 nm, µ̟ = 450 cm'/N s, and V, = 0.5 V. Find the value of the process transconductance parameter k. For a MOSFET with minimum length %3D fabricated in this process, find the required value of W so that the device exhibits a channel resistance Ing of 1 k£2 at vos =1 V. %3Darrow_forwardFor a particular IC-fabrication process, the transconductance parameter k'n = 400 μA/V2, and Vt = 0.5 V. In an application in which vGS = vDS = Vsupply = 1.8 V, a drain current of 2 mA is required of a device of minimum length of 0.18 μm. What value of channel width must the design use?arrow_forwardCalculate the on-resistance of an NMOS transistor with W/L = 10/1 for VGS = 5 V, VSB = 0,VT O = 1 V, and VDS = 0 V. (b) Calculate the onresistance of a PMOS transistor with W/L = 10/1for VSG = 5 V, VSB = 0, VT O = −1 V, andVSD = 0 V. (c) What do we mean when we say thata transistor is “on” even though ID and VDS = 0?(d) What must be the W/L ratios of the NMOS andPMOS transistors if they are to have the same onresistance as parts (a) and (b) with |VGS| = 3.0 V?arrow_forward
- 5. Choose the correct answer: a) The reason of high input resistance of the MOSFET is: 1. The insulator layer. 2. The reverse biasing. 3. The forward biasing. b) Which transistor has no Ipss parameter?. 1. JFET. 2. E-MOSFET. 3. D-MOSFET. ¢) For an n-channel D-MOSFET transistor, at what condition can gm be greater than gmo?. 1. Vs is positive. 2. Vgs is negative. 3. Vas =0. d) A certain amplifier has an Rp=1KQ. When a load resistance of 1KQ is capacitively coupled to the drain, the gain will reduce to the: 1. Half. 2. Quarter. 3. Not change.arrow_forwardAnswer as quickly as possible. I'll give upvote. Thank you. The circuit shown is a common source amplifier with a current mirror bias. It is given that the NMOS (M1) parameters are μoCox = 3mA/V2, VTH,n = 0.5V and λ = 0.02 and the PMOS (M2 and M3) parameters are μoCox = 1mA/V2 and VTH,p = −0.6V . The PMOS transistor M3 does not have channel length modulation while PMOS transistor M2 has λ = 0.02. It is also given that the dimensions of M2 and M3 have equal widths of 5µm and lengths of L2 = 3µm and L3 = 1.5µm, respectively. M1 has length of L1 = 1µm and width of W1 = 2µm. Find the gm and ro of transistor M1.arrow_forwardFor the transistor , IS = 6×10−16 μA,αF = 0.985, and αR = 0.25. (a) What type oftransistor is in this circuit? (b) Label the collector, base, and emitter terminals of the transistor.(c) Label the emitter-base and collector-base voltages, and label the normal direction for IE , IC, andIB. (d) Write the simplified form of the transportmodel equations that apply to this particular circuitconfiguration. Write an expression for IE /IC. Writean expression for IE /IB. (e) Find the values of IE ,IC, IB, βF , βR, VE B, and VC B.arrow_forward
- Consider an NMOS transistor fabricated in a 0.18-μm process with L = 0.18 μm and W = 2 μm.The process technology is specified to have Cox = 8 fF/μm2, μn = 450 cm2/V.s and Vtn= 0.55V.(a) Find VGS and VDS that result in the MOSFET operating at the edge of saturation with ID =(100+X) μA. Where X=Last digit of your ID+2.5. here x=2arrow_forwardThe channel resistance of a MOSFET can be computed by getting the reciprocal of the derivative of the drain current with respect to the drain to source voltage. Compute the channel resistance (in Ω) of an NMOS operating in the linear region given the following MOSFET specifications: k = 2.39μA/V2, W/L = 157, VGS = 4V, VTH = 0.90V, and VDS = 0.24V.arrow_forwardAn npn transistor with IS = 1 × 10−16 μA, αF =0.975, and αR = 0.5 is operating with VB E = 0.70 Vand VBC = 0.50 V. By definition, this transistor isoperating in the saturation region. However, in thediscussion it was noted that this transistor actually behaves as if it is still in the forwardactive region even though VBC > 0. Why? Use thetransport model equations to justify your answerarrow_forward
- Given that R1 = 10 kΩ R2 = 1 kΩ RD = 200 Ω, μnCox = 200 μA/V2, μpCox = 100 μA/V2, W/L = 20/0.18, λ = 0, and Vt = 0.4 V for NMOS and -0.4 V for PMOS, determine IG, ID, IS, VG, VD, and VS for the MOSFET circuits given above.arrow_forwardConsidering the given transistor circuit and given values(β=60; V BE =0,5 V; VCC =15V; R E=1K ; R c=10K ; R1=60K ;R2=30K ).a. Find the base, collector, and emitter currents b. Find the voltage gain of this circuit c. Find the voltage gain by ignoring the capacitor connected to the emitterd. Briefly describe the transistor active zone and state its importancearrow_forwardA transistor has an a of 0.98 and a collector-to-base leakage current of 0.02 uA. (a) Find its collector-to-emitter leakage current. (b) Find the beta of the transistor. (c) Find (the exact) IC when IB = 0.04 mA. (d) Find the approximate IC, neglecting leakage current.arrow_forward
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How a MOSFET Works - with animation! | Intermediate Electronics; Author: CircuitBread;https://www.youtube.com/watch?v=Bfvyj88Hs_o;License: Standard Youtube License