Microelectronics: Circuit Analysis and Design
4th Edition
ISBN: 9780073380643
Author: Donald A. Neamen
Publisher: McGraw-Hill Companies, The
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Textbook Question
Chapter 7, Problem 7.64P
The midband voltage gain of a common−source MOSFET amplifier is
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For an Armstrong indirect FM transmitter with the crystal carrier oscillating at 210 kHz, the crystal reference oscillating at 10.2 MHz, the sideband voltage is 0.018 V, the carrier input voltage to the combiner is 5V, the first and second multipliers are both 40, and the modulating signal frequency is 2 kHz, determine: a.) modulation index at the output of the combining network and the power amplifier; b.) frequency deviation at the same two points; and c.) the transmit carrier frequency.
Consider a modulating signal of 20khz that is applied to an FM modulator, whose modulation index (β) is a value of 4, then the real bandwidth will be:
amplitude value of output voltage (Vout) = ??
Note1 : E-MOSFET output empedance rd= 70kΩ
Note2: capacitors are of negligible size at midband frequency
Note3 : 5kHz in midband frequency
Chapter 7 Solutions
Microelectronics: Circuit Analysis and Design
Ch. 7 - (a) For the circuit shown in Figure 7.2, the...Ch. 7 - The circuit shown in Figure 7.10 has parameters of...Ch. 7 - For the equivalent circuit shown in Figure 7.13,...Ch. 7 - The equivalent circuit in Figure 7.14 has circuit...Ch. 7 - The parameters in the circuit shown in Figure 7.15...Ch. 7 - For the circuit shown in Figure 7.2 1(a), the...Ch. 7 - Consider the circuit shown in Figure 7.22(a). The...Ch. 7 - For the emitterfollower circuit shown in Figure...Ch. 7 - The circuit shown in Figure 7.27(a) has parameters...Ch. 7 - Consider the common-base circuit shown in Figure...
Ch. 7 - The commonemitter circuit shown in Figure 7.34...Ch. 7 - A bipolar transistor has parameters o=120 ,...Ch. 7 - Prob. 7.9EPCh. 7 - For the circuit in Figure 7.41(a), the parameters...Ch. 7 - A bipolar transistor is biased at ICQ=120A and its...Ch. 7 - For the transistor described in Example 7.9 and...Ch. 7 - The parameters of a bipolar transistor are: o=150...Ch. 7 - The parameters of an nchannel MOSFET are...Ch. 7 - For the circuit in Figure 7.55, the transistor...Ch. 7 - An nchannel MOSFET has parameters Kn=0.4mA/V2 ,...Ch. 7 - An nchannel MOSFET has a unitygain bandwidth of...Ch. 7 - For a MOSFET, assume that gm=1.2mA/V . The basic...Ch. 7 - The transistor in the circuit in Figure 7.60 has...Ch. 7 - Consider the commonbase circuit in Figure 7.64....Ch. 7 - The cascode circuit in Figure 7.65 has parameters...Ch. 7 - Prob. 7.12TYUCh. 7 - For the circuit in Figure 7.72, the transistor...Ch. 7 - Describe the general frequency response of an...Ch. 7 - Describe the general characteristics of the...Ch. 7 - Describe what is meant by a system transfer...Ch. 7 - What is the criterion that defines a corner, or...Ch. 7 - Describe what is meant by the phase of the...Ch. 7 - Describe the time constant technique for...Ch. 7 - Describe the general frequency response of a...Ch. 7 - Sketch the expanded hybrid model of the BJT.Ch. 7 - Prob. 9RQCh. 7 - Prob. 10RQCh. 7 - Prob. 11RQCh. 7 - Sketch the expanded smallsignal equivalent circuit...Ch. 7 - Define the cutoff frequency for a MOSFET.Ch. 7 - Prob. 14RQCh. 7 - Why is there not a Miller effect in a commonbase...Ch. 7 - Describe the configuration of a cascode amplifier.Ch. 7 - Why is the bandwidth of a cascode amplifier...Ch. 7 - Why is the bandwidth of the emitterfollower...Ch. 7 - Prob. 7.1PCh. 7 - Prob. 7.2PCh. 7 - Consider the circuit in Figure P7.3. (a) Derive...Ch. 7 - Consider the circuit in Figure P7.4 with a signal...Ch. 7 - Consider the circuit shown in Figure P7.5. (a)...Ch. 7 - A voltage transfer function is given by...Ch. 7 - Sketch the Bode magnitude plots for the following...Ch. 7 - (a) Determine the transfer function corresponding...Ch. 7 - Consider the circuit shown in Figure 7.15 with...Ch. 7 - For the circuit shown in Figure P7.12, the...Ch. 7 - The circuit shown in Figure 7.10 has parameters...Ch. 7 - The transistor shown in Figure P7.14 has...Ch. 7 - Consider the circuit shown in Figure P7.15. The...Ch. 7 - The transistor in the circuit shown in Figure...Ch. 7 - For the common-emitter circuit in Figure P7.17,...Ch. 7 - The transistor in the circuit in Figure P7.20 has...Ch. 7 - For the circuit in Figure P7.21, the transistor...Ch. 7 - (a) For the circuit shown in Figure P7.22, write...Ch. 7 - Consider the circuit shown in Figure P7.23. (a)...Ch. 7 - The parameters of the transistor in the circuit in...Ch. 7 - A capacitor is placed in parallel with RL in the...Ch. 7 - The parameters of the transistor in the circuit in...Ch. 7 - Prob. D7.27PCh. 7 - The circuit in Figure P7.28 is a simple output...Ch. 7 - Reconsider the circuit in Figure P728. The...Ch. 7 - Consider the circuit shown in Figure P7.32. The...Ch. 7 - The commonemitter circuit in Figure P7.35 has an...Ch. 7 - Consider the commonbase circuit in Figure 7.33 in...Ch. 7 - Prob. 7.39PCh. 7 - The parameters of the transistor in the circuit in...Ch. 7 - In the commonsource amplifier in Figure 7.25(a) in...Ch. 7 - A bipolar transistor has fT=4GHz , o=120 , and...Ch. 7 - A highfrequency bipolar transistor is biased at...Ch. 7 - (a) The frequency fT of a bipolar transistor is...Ch. 7 - The circuit in Figure P7.48 is a hybrid ...Ch. 7 - Consider the circuit in Figure P7.49. Calculate...Ch. 7 - A common-emitter equivalent circuit is shown in...Ch. 7 - For the common-emitter circuit in Figure 7.41(a)...Ch. 7 - For the commonemitter circuit in Figure P7.52,...Ch. 7 - Consider the circuit in Figure P7.52. The resistor...Ch. 7 - The parameters of the circuit shown in Figure...Ch. 7 - The parameters of an nchannel MOSFET are kn=80A/V2...Ch. 7 - Find fT for a MOSFET biased at IDQ=120A and...Ch. 7 - Fill in the missing parameter values in the...Ch. 7 - (a) An nchannel MOSFET has an electron mobility of...Ch. 7 - A commonsource equivalent circuit is shown in...Ch. 7 - Prob. 7.60PCh. 7 - The parameters of an ideal nchannel MOSFET are...Ch. 7 - Figure P7.62 shows the highfrequency equivalent...Ch. 7 - For the FET circuit in Figure P7.63, the...Ch. 7 - The midband voltage gain of a commonsource MOSFET...Ch. 7 - Prob. 7.65PCh. 7 - Prob. 7.67PCh. 7 - The bias voltages of the circuit shown in Figure...Ch. 7 - For the PMOS commonsource circuit shown in Figure...Ch. 7 - In the commonbase circuit shown in Figure P7.70,...Ch. 7 - Repeat Problem 7.70 for the commonbase circuit in...Ch. 7 - In the commongate circuit in Figure P7.72, the...
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- fT = 500 MHz, rx = 300 Ω, Cμ = 0.75 pF, CGS = CGD = 2.5 pF. (a) What are the midband gain and upper-cutoff frequency for the common-emitter amplifier (a) if IC = 1 mA and βo = 100? (b) What is the gain bandwidth product for this amplifier? (c) What is the value of the current gain of the transistor at f = fH ? Make use of the CT approximation.arrow_forwardFor a mosfet amplifier circuit, how can I choose an input and output capacitor with poles at 10Hz and 100Hz? Where RC = 1/w.arrow_forwardQ1 ] A carrier signal ( peak amplitude = 39V , frequency = 100MHz ) frequency modulated by the baseband signal ( peak amplitude = 5V , bandwidth = 12.02kHz ) . The frequency deviation is 77.53kHz , and the load is 5112. Determine ( a ) the load power , ( b ) the bandwidth of the transmitted signal . ( consider only IJn ( $ ) > 0.1 ) .arrow_forward
- What are the advantages and disadvantages of single-sideband transmission? Briefly describe each.arrow_forward-MCQ- FM modulator is used to transmit a cosine message signal with 4V amplitude and 20Hz frequency. The frequency deviation constant kf = 25 Hz/V, the carrier is a cosine sign with an amplitude of 10V and a frequency of 2000Hz. The FM modulated signal is passed through a bandpass filter and 90% of the power of the modulated signal remains. What is the bandwidth of the FM modulated signal in this case? a) 240hz b) 20hz c) 100hz d)200hzarrow_forwardBandwidth requirements:a. Find the minimum required bandwidth for the baseband transmission of a 32-level PAM pulse sequence with a data rate, R of 10000 bps if the system transfer characteristic consists of a raised-cosine spectrum with 100% excess bandwidth (roll-off, r = 1.0).b. Find the minimum required double-sideband (DSB) bandwidth for transmitting the modulated PAM sequence where the system transfer characteristic is the same as in part (a).c. Repeat part (a) with roll-off, r = 0.5.d. Repeat part (b) with roll-off, r = 0.5.e. Repeat part (a) with roll-off, r = 0.f. Repeat part (b) with roll-off, r = 0.arrow_forward
- Bandwidth beta=250Hz, center frequency f0=750Hz of the band-proof circuit consisting of serial LCis desired.If the capacitor value is 100nF, what should the R and L values be?arrow_forwardChose the correct answer 6- The bandwidth required for a modulated carrier depends on: a) The carrier frequency b) the signal-to-noise ratio c) the signal-plus-noise to noise ratio d) The baseband frequency rangearrow_forwardIdentify how the excessive bandwidth use of FM can be overcome. (Check all that apply.) By using narrowband FM with small deviation ratios By using wideband FM with large deviation ratios By operating in the ultrahigh frequency (UHF) region By operating in the ultralow frequency (ULF) region By operating in the microwave regionarrow_forward
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