In a differential amplifier an idea! OMMR is
The opamp circuit shown below is initially nulled having a supply voltages of ± 15 V. The output voltage VQ is
Given circuit represents an inverting summer using opamp
Here,
R = R_{1} = R_{2} = R_{3} = R_{f} = 1 kΩ
and
V_{1} = +2 V, V_{2} = +3 V, V_{3} = +4 V
The output voltage is
For the circuit shown below, the output voltage is given by
Using superposition theorem, the output voltage is given by
For an astabie multivibrator shown below,
R_{1} = 116 KΩ, R_{2} = 100 KΩ, and ± V_{sat} = ± 14 V.
The time constant of the circuit to produce an output of frequency 1 kHz will be
The time period of the given a stablem ultivibrator circuit is given by
An ideal operational amplifier has input impedance of
For an ideal OPAMP, input impedance is infinite while output impedance is zero.
For the opamp circuit shown below, R_{1} = 1 kΩ and R_{f} = 10 kΩ. The feedback factor β of this amplifier is
Given op amp circuit re p re se n ts a c losed loop non inverting amplifier. The feed back factor is given by
The order of input resistance in 741 OPAMP is
For a practical OPAMP in put impedance is of the order of 10^{6}Ω
For a given opamp, CMMR = 10^{5} and differential gain A_{d} = 10^{5}. The commonmode gain of the opamp is
An inverting amplifier using the 741C must have a fiat response upto 40 kHz. The gain of the amplifier is 10 and slew rate is 0.5 V/μS. The maximum peaktopeak input signal that can be applied without distorting the output is approximately equal to
We know that
An idea! operational amplifier has
1. nonzero, off set voltage.
2. characteristics which do not drift with temperature.
3. an infinite voltage gain.
4. a CMMR more than 120 dB.
5. infinite bandwidth.
Of these statements:
An ideal operational amplifier has
Hence, statements 2 , 3 and 5 are only correct.
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