Answer / shivaleela

Here db(logarithmic unit) stands for Decibel. In humans the
audible range of frequencies is usually said to be 20 Hz
(cycles per second) to 20 kHz (20,000 Hz). It may be harmful
for human ear if it exceeds that range.Hence the value of dB
is always -(minus).

Answer / reza r

Very large and very small values in mathematics can be
mentioned by dB. dB is a logarithmic calculation that
normalizes the value of a factor.

- sign in the value of a signal is because of noting that
the signal is incoming to the antenna (received signal) not
the transmitted one!

Answer / kashmir singh

The decibel ( dB) is used to measure sound level, but it is also widely used in electronics, signals and communication. The dB is a logarithmic unit used to describe a ratio or it is the unit of sound.
its value is showing in minus(-) because mathematically we take antilog of the value of sound/noise

Answer / king

db is the unit for electromagnetic signal power
and (- )sign indicates that the power of the signal is too week
i.e in minus side
a lots of amplification stages are needed to make it useful

Explain how to convert binary to gray code and vice-verse?

0 Answers  

---

A 12v regulated dc power supply has a voltage regulation of 0.5% find amagnitude of variation?

1 Answers   TCS,

---

What is the protocol ?

2 Answers   TATA,

---

What is the use of starter and choke in tube

0 Answers   Sukhbir Solar Energy, Wipro,

---

What is a feedback?

0 Answers  

---

---

What are the building blocks of a digital circuit?

0 Answers  

---

Which Programer/Programing Software Should i use to program Mitsubishi FX Series PLC. PLZ DO ANSWER

0 Answers  

---

With the help of diagram explain a cmos inverter.

0 Answers  

---

y u looking for a job in it field sinc u r a ece graduate.

0 Answers   SysBiz, Ven Consulting India, Wipro,

---

Explain the differences between voltage and current controlled devices?

0 Answers  

---

what is the ideal resistanceearth and why?????????????

0 Answers  

---

What is the difference between ASICs and FPGA devices? Which one is better? Which is being currently in use?

4 Answers  

---