The ideal OP-AMP has the following characteristics[GATE 2001-1Mark]

• R i  = ∞,

  A V = ∞,

  R o  = 0  

• R i  = 0,

  A V = ∞,

  R o  = 0

• R i  = ∞,

  A V = ∞,

  R o  = ∞  

•  R i  = 0,

  A V = ∞,

  R o  = ∞

An active filter shown in the below figure. Determine DC gain and 3dB cutoff frequency of the filter R₁=15.9kΩ, R₂=159kΩ, C=1.0nf.[GATE-EE-2010]

• 40dB,3.14kHz

• 40dB,1kHz

• 20dB,6.28kHz

• 20dB,1kHz

Given that the Op-Amp is ideal, the output voltage Vo is [GATE-EE-2010]

• 4 V

• 6 V

• 7.5 V

• 12.12 V

If the input to the circuit of figure is a sine wave the output will be[GATE-1990-2 Marks]

• square wave
• random noise
• sine wave
• triangle wave

For the op-amp shown in the figure, the bias currents are Ib1= 450 nA and Ib2=350 nA. The values of the input bias current (IB) and the input offset current (If) are:[GATE-IN-2014]

• (A) IB= 800 nA, If=50 nA

• (B) IB= 800 nA, If=100nA

• (C) IB= 400 nA, If=50nA

• (D) IB= 400 nA, If=100nA

Assume that the op-amp of the figure is ideal. If V_i is a triangular wave, then V₀ will be [GATE-2000: 1 Mark]

• Square wave
• Sawtooth wave
• DC voltage
• Sine wave

Assuming the op-amp to be ideal, the voltage gain of the amplifier shown below is [GATE-2010: 1 Mark]

• −R2​​/R1​
  

• −R3​​/R1​

• -(R2​​||R3)/R1

• -(R2​​+R3)/R1

The amplifier in the figure has gain of −10 and input resistance of 50 kΩ. The values of Ri and Rf are: :[GATE-IN-2014]

• (A) Ri= 500 kΩ, Rf = 50 kΩ     

•    (B) Ri= 50 kΩ, Rf = 500 kΩ

• (C) Ri= 5 kΩ, Rf = 10 kΩ          

•      (D) Ri= 50 kΩ, Rf = 200 kΩ

The output Vo shown in the figure is close to.[GATE-IN-2017 ]

• -20 V

• -15 V

• -5 V

• 0V

The circuit shown below is an example of a[GATE-EE-2016]

• A) low pass filter

• (B) band pass filter

• (C) high pass filter

• (D) notch filter