In amplitude modulation (AM), what does the spectrum of a carrier modulated by a single sine wave consist of?
Explanation
This question tests fundamental knowledge of amplitude modulation (AM), specifically the spectral components that result from modulating a carrier with a sine wave.
Other questions
Based on the graph of collector-to-base capacitance versus collector voltage in Figure 13.3, what is the approximate Ccb for a 2N3725 transistor at a collector voltage of 10 volts?
What is the typical range for the exponent 'n' in the formula C = k(V - Vd)^n, which describes how the capacitance of a reverse-biased semiconductor junction in a transistor varies with voltage?
According to the graph of gain-bandwidth product (fT) versus collector current (Ic) in Figure 13.4, at what collector current does the 2N3904 transistor reach its peak fT?
What is the primary reason a transistor manufacturer typically specifies the transition frequency, fT?
In the high-frequency amplifier analysis example using a 2N4124 transistor, what phenomenon is identified as the dominant factor that severely limits the high-frequency rolloff?
For the 2N4124 amplifier example, with a low-frequency voltage gain of 100 and a feedback capacitance Ccb of 2.4 pF, what is the calculated effective input capacitance due to the Miller effect?
Which high-frequency amplifier configuration is described as a common-emitter stage driving a common-base stage, which eliminates the Miller effect by pinning the emitter of the second transistor with a fixed base voltage?
In the wideband design example from section 13.05, which uses the 2N5179 transistor in a configuration designed to eliminate Miller rolloff, what is identified as the ultimate performance-limiting factor?
What is the specified collector-to-base capacitance (Ccb) for the 2N5179 transistor at a bias of 2 volts, as used in the wideband differential amplifier example?
In the performance analysis of the wideband amplifier design example in section 13.05, at what frequency was the overall circuit's output estimated to be down by 3dB?
What phenomenon in high-frequency amplifiers is known as 'pole splitting'?
The 2N5179 transistor is specified with a 'collector-base time constant' (r'b * Ccb) of 3.5 picoseconds. Given its Ccb is 0.5 picofarads, what is the implied base 'spreading' resistance (r'b)?
What are the typical input and output impedance levels for prepackaged modular RF amplifiers, designed for convenient system integration?
What semiconductor technologies are mentioned for creating wideband amplifiers that operate at frequencies up to 18 GHz and beyond?
According to the caption for Figure 13.14, which of the following is NOT part of the described hybrid construction technique?
What method is invariably used to measure the noise figure or noise temperature in microwave amplifiers?
Recent designs employing high-electron-mobility FETs (HEMTs) have achieved what phenomenal noise temperature at 8.5 GHz?
According to the text, what is the approximate maximum transition frequency (fT) one can expect from an operational amplifier if an input offset of 10 mV or so can be tolerated?
According to Table 13.1 (RF Transistors), what is the typical transition frequency (fT) for the 2N5179 transistor when operated at a collector current of 10mA?
Based on the comments in Table 13.1 (RF Transistors), which device is specifically identified as a 'micropower' transistor?
What is the typical slew rate specified for the AD844A wideband op-amp in Table 13.2?
In Table 13.2 (Wideband Op-Amps), what is the comment provided for the EL2022 op-amp?
What is the fundamental rule for connecting a load to a transmission line in radiofrequency circuits to ensure proper operation and signal transfer?
What is the typical characteristic impedance range for parallel-conductor transmission lines?
On a mismatched transmission line, what happens to a wave when it reaches a termination that is an open circuit?
A transmission line that is an integral number of half wavelengths long is terminated in an impedance Z_load. What input impedance Z_in does this line present?
What is a primary advantage of using a broadband transmission-line transformer over a conventional wire-wound transformer at high frequencies?
In the context of tuned RF amplifiers, what is the technique of 'neutralization' used for?
For creating tunable oscillators for gigahertz frequencies, what component does a YIG-tuned oscillator use as its magnetically tunable resonant element?
To achieve the highest level of frequency stability for timekeeping, what type of oscillator is used?
In the context of radiofrequency circuits, what is a 'mixer'?
What distinguishes a 'balanced mixer' from a simple nonlinear mixer like a diode?
What type of RF passive device, employing exotic ferrite materials and magnetic fields, is designed to transmit waves in only one direction between its two ports?
What type of filter is mentioned as being 'extremely important' for setting receiver selectivity and is made from piezoelectric or mechanical resonators?
What is 'synchronous detection', also called 'homodyne detection'?
What is the primary characteristic of the bolometric method for measuring RF power?
What is the primary function of a superheterodyne ('superhet') receiver?
In a superheterodyne receiver, what is the 'image' frequency?
What is the primary advantage of single-sideband (SSB) modulation compared to standard amplitude modulation (AM)?
In FM broadcasting, what is the peak frequency deviation (fdev) used, and what approximate bandwidth does this result in for each station?
Which method of detecting FM signals is described as a parallel LC circuit tuned off to one side of the IF, which converts frequency deviation into amplitude modulation?
According to the Shannon sampling theorem, which makes digital transmission of analog signals possible, a band-limited waveform is fully described by sampling its amplitude at what rate?
In pulse-code modulation (PCM), what makes it particularly useful in repeater applications where a signal must be amplified multiple times?
What is the primary purpose of using RF 'chokes' and shielded 'feedthrough capacitors' on power supply lines entering a shielded RF enclosure?
When building circuits for VHF and UHF frequencies, why is it absolutely essential to keep component leads as short as possible?
In the context of exotic RF devices, what are 'paramps' (parametric amplifiers) used for?
Which exotic diodes are described as being used extensively at UHF and microwave frequencies as low-power oscillators in the 5-100 GHz range?
In the transistor model for high-speed switching, what is the 'storage time' (ts)?
What is the purpose of using a Schottky diode as a 'Baker clamp' from a transistor's base to its collector in a high-speed switching circuit?