Answer / khurram_bhati01

OP-AMP IS BASICALLY AN IC, E.G 741 WHICH HAVE THE FOLLOWING
CHARACTERISTICS.
HIGH INPUT IMPEDENCE
LOW OUTPUT IMPEDANCE
HIGH GAIN

AN OP-AMP CAN BE USED AS AMPLIFIER AND AS A COMPARATOR.
THESE ARE ITS APPLICATION.

IN AMPLIFER MODE ITS JUST AMPLIFY THE INPUT SIGNAL.
IN COMPARATOR MODE IT IS USED TO SENCE THE TWO INPUT
VOLTAGE, ONE IS REFERANCE AND OTHER VARIES. COMPARATOR
CHANGES ITS OUTPUT STATE AS THE VARING VOLTAGE INCREADED OR
DECREASED FROM THE REFERANCE.

Answer / rupesh raj karn

OP AMP is just an IC741 found in market.
Comparator is an OP AMP used in open loop configuration.
Amplifier is OP AMP in closed loop configuration

What is the gross data rate of GSM?

1 Answers  

---

Which modulation is good for Radio Broadcasting. AM(Amplitude Modulation) or FM(Frequency Modulation)?

7 Answers   TCS, Vodafone,

---

what is IP 68 & IP 66?

2 Answers   Ecil, ONGC, TCS,

---

what is the purpose to give two power supply to opamp ie. +Vcc & -Vee?

1 Answers   SCOE,

---

Explain why is an excess-3 code is called an unweighted code?

0 Answers  

---

Write two characteristics of combinational circuits.

0 Answers  

---

about transmitter

1 Answers   BSNL,

---

What are the advantages of six pulse converter?

0 Answers  

---

What is GSM?

7 Answers  

---

what is am transceiver.

0 Answers  

---

why does the current through inductor is constant, why current through inductor & voltage across capacitor is constant? can u explin clearly?

3 Answers   BEL,

---

What is PLC ? How it is useful in automations ?

2 Answers   PTCL,

---