Answer / chinnagoud4u

Amplifier increase the
strength of signal

Answer / hayat wali

Amplifier is a circuit which increases Dc power to a signal
so as to increase it's power.

Answer / pravin

an amplifier strengthens a weak signal into a strong
signal.it also increases the amplitude of the signal

pls provide me a placement paper for HPCL exam for Elecronics & communication exam. this is a request pls do the needful as early as possible.

0 Answers   Airtel,

---

Define amplitude modulation?

0 Answers  

---

What is the Difference between von neumann and harvard computer architecture?

5 Answers   Intel,

---

Which principle to work in pressure gauge?

1 Answers  

---

draw the fig of bridge rectifier?

0 Answers  

---

What is zener voltage?

0 Answers  

---

what is the basic steps for designing an ups,inverters, and battery connections for series and parrallel connections in ups

0 Answers   Godrej,

---

What is meant by D-FF? What is the basic difference between Latches and Flip flops? What is a multiplexer? How can you convert an SR Flip-flop to a JK Flip-flop? How can you convert an JK Flip-flop to a D Flip-flop? What is Race-around problem? How can you rectify it? Which semiconductor device is used as a voltage regulator and why? What do you mean by an ideal voltage source? What do you mean by zener breakdown and avalanche breakdown? What are the different types of filters? What is the need of filtering ideal response of filters and actual response of filters? What is sampling theorem? What is impulse response? Explain the advantages and disadvantages of FIR filters compared to IIR counterparts. What is CMRR? Explain briefly. What do you mean by half-duplex and full-duplex communication? Explain briefly. Which range of signals are used for terrestrial transmission? What is the need for modulation? Which type of modulation is used in TV transmission? Why we use vestigial side band (VSB-C3F) transmission for picture? When transmitting digital signals is it necessary to transmit some harmonics in addition to fundamental frequency? For asynchronous transmission, is it necessary to supply some synchronizing pulses additionally or to supply or to supply start and stop bit? BPFSK is more efficient than BFSK in presence of noise. Why? What is meant by pre-emphasis and de-emphasis? What do you mean by 3 dB cutoff frequency? Why is it 3 dB, not 1 dB?

0 Answers   MAHINDRA,

---

What is the chemical composition of the substance used as feed horn? And how many types of feedor are there?

0 Answers   HCL,

---

How to measure frequency without cro?

0 Answers  

---

Define negative logic.

0 Answers  

---

what is microprocessor & how it is work.

6 Answers   TCS,

---