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The closed-loop voltage gain is reciprocal ofĮxplanation: Comparing the equation of closed loop voltage gain (AF) and the gain of the feedback circuit (B).
#OP AMP OFFSET AND ATTENUATOR SERIES#
On what criteria does the feedback amplifier are classified?Įxplanation: The feedback amplifiers are classified according to whether the voltage or current is fed back to the input in series or in parallel.ġ8. Find the voltage-series feedback amplifier from the given diagram?Įxplanation: The mentioned diagram is the voltage-series feedback amplifier because the voltage across load resistor is the input voltage to the feedback circuit.ġ7. When load current flows into the feedback circuit, the configuration is said to beĮxplanation: In current-series and current-shunt feedback circuit, the load current flows into the feedback circuit.ġ6. Which of the following is not a feedback configuration?Įxplanation: In a feedback amplifier, either current or voltage can be fed back to the input, but both current and voltage cannot be feedback simultaneously.ġ5. They are voltage series feedback, voltage shunt feedback, Current series feedback and Current shunt feedback.ġ4. How many types of configuration are available for feedback amplifier?Įxplanation: There are four type of configuration are available. A feedback amplifier is also called asĮxplanation: A feedback amplifier is sometimes referred as a closed loop amplifier because the feedback forms a closed loop between input and the output.ġ3. These saturation voltages are specified by an output voltage swing rating of the op-amp for given values of supply voltage.ġ2. The output cannot exceed the positive and negative saturation voltage. Which factor determine the output voltage of an op-amp?Ĭ) Both positive and negative saturation voltageĮxplanation: Output voltage is proportional to input voltage only until it reaches the saturation voltage. (Gain=3)Įxplanation: The output voltage, VO = (Vin1– Vin2)ġ1. It’s one of the inputs and output voltages are 2v and 12v.
![op amp offset and attenuator op amp offset and attenuator](https://i.stack.imgur.com/YrFXk.png)
Find the input voltage of an ideal op-amp. Which is not the ideal characteristic of an op-amp?Įxplanation: Input resistance is infinite so almost any signal source can drive it and there is no loading of the preceding stage.ġ0. Find the output voltage, if the other input voltage isĮxplanation: Although the output is 180o out of phase with input signal, the gain of the amplifier is not given.ĩ. The signal to an inverting terminal of an ideal op-amp is zero.
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How will be the output voltage obtained for an ideal op-amp?Ī) Amplifies the difference between the two input voltagesī) Amplifies individual voltages input voltagesĬ) Amplifies products of two input voltageĮxplanation: Op-amp amplifies the difference between two input voltages and the polarity of the output voltage depends on the polarity of the difference voltage.Ĩ. If V1 and V2 are the two input voltagesĮxplanation: The output voltage of an ideal op-amp is the product of gain and algebraic difference between the two input voltages.ħ. Find the output voltage of an ideal op-amp. The output will be in-phase with the input signal.Ħ. Determine the output voltage from the following circuit diagram?Įxplanation: In an ideal op-amp when the inverting terminal is zero. differential input voltage) is essentially zero for finite output voltage.ĥ. Ideal op-amp has infinite voltage gain becauseĮxplanation: As the voltage gain is infinite, the voltage between the inverting and non-inverting terminal (i.e. Therefore, any frequency signal from 0 to ∞ Hz can be amplified without attenuation.Ĥ. An ideal op-amp requires infinite bandwidth becauseĪ) Signals can be amplified without attenuationī) Output common-mode noise voltage is zeroĬ) Output voltage occurs simultaneously with input voltage changesĭ) Output can drive infinite number of deviceĮxplanation: An ideal op-amp has infinite bandwidth. Which of the following electrical characteristics is not exhibited by an ideal op-amp?Įxplanation: An ideal op-amp exhibits zero output resistance so that output can drive an infinite number of other devices.ģ. Therefore, the output Vo is 180o out of phase with input signal V2.Ģ. Determine the output from the following circuitĮxplanation: The input signal is given to the inverting input terminal.