Bissoy.com
Doctors Medicines MCQs Q&A

If a common emitter configuration BJT is treated as a two port network, the gain of the amplifier is roughly given by the S parameter:

If a common emitter configuration BJT is treated as a two port network, the gain of the amplifier is roughly given by the S parameter: Correct Answer S21

When a BJT is represented as a two port network, where the base is port 1 and collector is port 2. Gain of the amplifier is given by the parameter S21. This parameter drops quickly with an increase in the operating frequency.

Related Questions

In each question below is given a statement numbered I, II and III. An assumption is something supposed or taken for granted. You have to consider the following assumption and decide which of the assumption is implicit in the statement. Statement: Every time Sri Lanka’s president, Mahinda Rajapaksa, turned to his Chinese allies for loans and assistance with an ambitious port project, the answer was yes. Yes, though feasibility studies said the port wouldn’t work. Yes, though other frequent lenders like India had refused. Yes, though Sri Lanka’s debt was ballooning rapidly under Rajapaksa.  Assumptions: I. China had a stake in Sri Lanka’s main port as well, China Harbor was building a new terminal there, known at the time as Colombo Port City. Along with that deal came roughly 50 acres, solely held by the Chinese company, where Sri Lanka had no sovereignty.  II. Sri Lankan officials are quick to point out that the agreement explicitly rules out China’s military use of the site. But others also note that Sri Lanka’s government, still heavily indebted to China, could be pressured to allow it.  III. The rising debt and project costs, even as the port was struggling, handed Sri Lanka’s political opposition a powerful issue, and it campaigned heavily on suspicions about China. Rajapaksa may lose the election.
A transistor is used in common emitter mode as an amplifier. Then a. The base-emitter junction is forward biased b. The base-emitter junction is reverse biased  c. The input signal is connected in series with the voltage applied to the base-emitter junction  d. The input signal is connected in series with the voltage applied to bias the base-collector junction Which of the following statement is true?
Choose the correct statement(s) i) The gate circuit impedance of MOSFET is higher than that of a BJT ii) The gate circuit impedance of MOSFET is lower than that of a BJT iii) The MOSFET has higher switching losses than that of a BJT iv) The MOSFET has lower switching losses than that of a BJT
Which among the following options represents the correctly matched pair of the name of the sea-port and their state? Name of the port State A. Jawaharlal Nehru Port 1. Tamil Nadu B. Paradip Port 2. Maharashtra C. Kandla Port 3. Odisha D. Ennore Port 4. Gujarat
In a uniformly doped BJT, assume that NE, NB and NC are the emitter, base and collector doping in atoms/cm3, respectively. If the emitter injection efficiency of the BJT is close to unity, which one of the following conditions is TRUE?
For a narrow base PNP BJT, the excess minority carrier concentrations (ΔnE for emitter, ΔpB for base, ΔnC for collector) normalized to equilibrium minority carrier concentrations (nE0 for emitter, pB0 for base, nC0 for collector) in the quasi-neutral emitter, base and collector regions are shown below. Which one of the following biasing modes is the transistor operating in?
You are installing a network interface card on a computer with the following configuration: a 5867133 CPU, 16MB or RAM, a 800-MB IDE hard disk, a parallel port configured as LPT1, and a serial port configured as COM1, which is currently used by a mouse. In addition to the IDE host adapter and the video card, the following devices have been installed on the computer's expansion bus: a modem on COM2, a SCSI host adapter for a CD-ROM drive, and a sound card. The SCSI hose adapter is using IRQ 5, and the sound card is using IRQ 11. The network interface card that you are installing supports the following choices for IRQ: 2, 3, 4, 5, 9,10 and 11. Which IRQ(s) could you use for the network interface card without creating an IRQ conflict with another device?
You are the administrator of a Windows 2000 Server computer. The server contains one network adapter and is a file and print server for critical company resources. You install a second network adpater in the server and connect it to the same network subnet as the first adapter. You want to ensure that the first adapter is used for all network traffic and the second adapter is used only if the first adapter fails or is disconnected from the network. You also want to ensure that the server always has network connectivity even if one network adapter fails. What should you do?
Which of the following statements are correct? Kolkata Port is the only riverine major port of India. The port of Cochin is located on Willington Island. Maharashtra has three major ports. Mundra port is India's major port in the private sector. Select the correct answer using the code given below:
Two non-inverting amplifiers, with gain =1 and gain=20 are made using identical operational amplifiers. As compared to the unity gain amplifier, the amplifier with gain=20 has ___________