10. The datasheet for the transistor used in a CD amplifier specifies IGss = 5 nA at VGs 10 V. If the resistor from gate to ground, RG, is 50 MN, the total input resistance is approximately (a) 50 M2 (b) 200 M2 (c) 40 M2 (d) 20.5 M2
Power Amplifier
The power amplifier is an electronic amplifier designed to maximize the signal strength of a given input. The input signal strength is enhanced to a high enough level to drive output devices such as speakers, headphones, RF (Radio frequency) transmitters, etc. Unlike voltage / current amplifiers, the power amplifier is designed to drive core loads directly and is used as a storage block in the amplifier series.
Maximum Efficiency Criterion
In every field of engineering, there is a tremendous use of the machine and all those machines are equipped for their popular work efficiency so it very much important for operation engineers to monitor the efficiency of the machine, planning engineers to check out the efficiency of the machine before installing the machine and design engineers to design machine for higher efficiency than and then the utility will procure their products that will ultimately lead to profit and loss of the company. It indicates the importance of efficiency right from the initial stage as manufacturing units, intermediate stage as planning coordinators, and end-users stage as a utility.
![10. The datasheet for the transistor used in a CD amplifier specifies IGSS = 5 nA at VGS =
10 V. If the resistor from gate to ground, RG, is 50 MQ, the total input resistance is
approximately
(а) 50 МQ
(b) 200 МО
(c) 40 MQ
(d) 20.5 MQ
11. The common-gate (CG) amplifier differs from both the CS and CD configurations in that it
has a
(a) much higher voltage gain
(b) much lower voltage gain
(c) much higher input resistance
(d) much lower input resistance
12. If you are looking for both good voltage gain and high input resistance, you must use a
(a) CS amplifier
(b) CD amplifier
(c) CG amplifier
13. A cascode amplifier consists of
(a) a CD and a CS amplifier
(b) a CS and a CG amplifier
(c) a CG and a CD amplifier
(d) two CG amplifiers
14. The class D amplifier is similar to
(a) class C
(b) class B
(c) class A
(d) none of these
15. The class D amplifier uses
(a) frequency modulation
(b) amplitude modulation
(c) pulse-width modulation
(d) duty cycle modulation
16. E-MOSFETS are generally used for switching applications because of their
(b) high input resistance
(d) high gain
(a) threshold characteristic
(c) linearity
17. A sampling circuit must sample a signal at a minimum of
(a) one time per cycle
(b) the signal frequency
(c) twice the signal frequency
(d) alternate cycles
18. The value of resistance emulated by a switched-capacitor circuit is a function of
(a) voltage and capacitance
(b) frequency and capacitance
(c) gain and transconductance
(d) frequency and transconductance
19. A basic CMOS circuit uses a combination of
(a) n-channel MOSFETS
(b) p-channel MOSFETS
(c) pnp and npn BJTS
(d) an n-channel and a p-channel MOSFET
20. CMOS is commonly used in
(a) digital circuits
(b) linear circuits
(c) RF circuits
(d) power circuits
21. If there is an internal open between the drain and source in a CS amplifier, the drain voltage is
equal to
(а) 0 V
(b) VDD
(c) VGS
(d) VGD](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3817caa6-fd4a-41bc-9dc2-dd9a7fdbdbe2%2Fd4cbce34-54fa-450d-9ccb-e78986b76264%2Fpj8kxwh_processed.jpeg&w=3840&q=75)
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