(a) Assume the transistor in the source-follower circuit shown in Figure
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Chapter 12 Solutions
Microelectronics: Circuit Analysis and Design
- a. An AM transmitter has the unmodulated carrier power of 20kW and can be modulated to a maximum of 70% before the system saturates/overloads. Find the value to which carrier power can be increased if 40% modulation limit is imposed.b. An analog communication system using FM has the highest modulating frequency of 5 kHz and maximum deviation of 25 kHz. Calculate the bandwidth of modulated signal using Carson’s rule. Compare this value with the one obtained using the simple formula. For practical systems which of these values should be used?arrow_forwardi) A communication system employs a continuous source. The channel noise is white and Gaussian. The bandwidth of the source output is 10 MHz and signal to noise power ratio at the receiver is 100. (a) Determine the channel capacity. (b) If the signal to noise ratio drops to 10, how much bandwidth is needed to achieve the same channel capacity as in (a). (c) If the bandwidth is decreased to 1 MHz, what S/N ratio is required to maintain the same channel capacity as in (a).arrow_forwardTuned Circuit Design Using a VARICAP (a) Refer to the capacitance curves for the Motorola 1N4002 The input tuning circuit of a standard analog FM radio is given below. Specify, that is design for, a voltage, capacitance, and inductance required to tune the circuit to the center frequency of KUMD-FM which operates at 103.3 MHz. Sketching and labeling a representative resonance curve is required to support your calculations. There is no single correct design answer set of values since it depends upon the voltage you initially select to tune your diode.arrow_forward
- Given that fc(OL) = 880 Hz, AOL = 91 dB. Determine the unity gain bandwidth...arrow_forwardElectronic Since k = 0.35x10^3, VGSQ = 6.2 V, VGS(Th) = 2.4 V, RF = 100 MΩ, RG = 10 MΩ, RD = 7.6 kΩ, RS = 2.2 kΩ and RL = 21 kΩ in the circuit in the figure, the output voltage In which option is the amplitude value (Vout) given correctly? NOTE-1: E-MOSFET output impedance is rd = 70 kΩ and should be taken into account in calculations. NOTE-2: Capacitors are of negligible size at mid-band frequency. NOTE-3: It is within the 5 kHz mid-band frequency.arrow_forwardDesign a single-sideband AM modulator and demodulator units based on following rules. Design Principles: bandwidth of filter you will design will be 6kHz in case of double sideband solutions. the carrier frequency is 4MHz. a) Determine the values of elements (if any; R, C, and L) used in the circuits. b) In case of noise (added to the modulated signal, What can be the SNR at i/p stage of demodulator? What can be the SNR at o/p stage of demodulator?arrow_forward
- In the circuit below, it is given as RE=1kΩ, RC=5kΩ, VEE=2V, VCC=8V. Parameters of the transistor in the circuit are given as aac =0.98,β0=100. Calculate the input and output impedances of the circuit and the current and voltage gains for medium frequencies.arrow_forwardThe equation of an angle-modulated voltage is v = 10 sin (l08t + 3 sin 104,). What form of angle modulation is this? Calculate the carrier and modulating frequencies, the modulation index and deviation, and the power dissipated in a 100-ohm resistor.arrow_forwardVcc=25V , Vi=35mV , RB =470kΩ , RC=2,6kΩ , RE1=470Ω , RE2=1.2kΩ , RL=16.8kΩ , β=110 Find the output voltage V0 = ? Note1=Capacitors are negligible at mid-band frequency. Note2 0 The output impedance (r0) of the transistor will be neglected.arrow_forward
- 1. a) Show (via a qualitative analysis) that the circuit is a bandreject filter. 2. b) Support the qualitative analysis of (a) by finding the voltage transfer function of the filter. 3. c) Derive the expression for the center frequency of the filter. 4. d) Derive the expressions for the cutoff frequencies ωc1 and ωc2. 5. e) What is the expression for the bandwidth of the filter? 6. f) What is the expression for the quality factor of the circuit?arrow_forward4. The front end of a television receiver, having a bandwidth of 7 MHz andoperating at a temperature of 27° C, consists of amplifiers having a gain of 15, followed by a mixer whose gain is 20. The amplifier has a 300Ω input resistor and a shot noise equivalent resistance of 500Ω . For the mixer; these values are 2.2kΩ and 13.5 kΩ, respectively, and the load resistance of the mixer is 470 kΩ. Calculate the equivalent noise resistance for this television receiver.5. A receiver connected to an antenna whose resistance is 50Ω has an equivalent noise resistance of 30Ω. What is the receiver’s noise temperature?arrow_forward"What is the maximum data rate of an analog circuit with a 20 MHz bandwidth using 256-QAM and V.44? Give the answer in Mbps." https://expert.chegg.com/expertqna#:~:text=What%20is%20the%20maximum%20data%20rate%20of%20an%20analog%20circuit%20with%20a%2020%20MHz%20bandwidth%20using%20256-QAM%20and%20V.44%3F%20Give%20the%20answer%20in%20Mbps.arrow_forward
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