Integrated Circuits Comparison
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Questions and Answers

What is a key limitation of monolithic ICs?

  • Complex manufacturing process
  • Large size
  • Limited power capabilities (correct)
  • High cost
  • How do thick-thin film ICs differ from monolithic ICs?

  • Use only active components
  • Smaller in size but larger in power (correct)
  • Larger in size but smaller in power
  • Integrate all components on one chip
  • What type of components might be connected discretely in thick-thin film ICs?

  • Resistors and capacitors
  • BJT and diodes (correct)
  • Passive components
  • Active components
  • What distinguishes hybrid ICs from monolithic and thick-thin film ICs?

    <p>Combining multiple ICs in one package</p> Signup and view all the answers

    How are bipolar ICs different from unipolar ICs based on active devices used?

    <p>Bipolar ICs use BJTs, unipolar ICs use FETs</p> Signup and view all the answers

    How are bipolar ICs further classified based on the isolation technique used?

    <p>p-n junction isolation ICs and dielectric isolation ICs</p> Signup and view all the answers

    What is the purpose of the virtual ground concept in opamp analysis with negative feedback?

    <p>To simplify calculations and derivations</p> Signup and view all the answers

    In the context of opamps, how does real ground differ from virtual ground?

    <p>Real ground is physically connected to the earth, while virtual ground is not electrically connected to ground.</p> Signup and view all the answers

    When analyzing opamp circuits, under what condition is the concept of a virtual ground valid?

    <p>When negative feedback is applied</p> Signup and view all the answers

    How does a differential amplifier combine the functionality of inverting and non-inverting amplifiers?

    <p>By connecting the non-inverting terminal to the ground for inverting operation</p> Signup and view all the answers

    What does grounding the inverting input terminal achieve in a differential amplifier circuit?

    <p>It makes the circuit behave as a non-inverting amplifier</p> Signup and view all the answers

    How is the input signal V1 amplified in a differential amplifier when the non-inverting terminal is grounded?

    <p>(R3 / R1)</p> Signup and view all the answers

    What is the purpose of the photolithographic process in the context of semiconductor fabrication?

    <p>To create openings in the SiO2 layer for impurity diffusion</p> Signup and view all the answers

    What is the purpose of the photoresist layer in the photolithographic process?

    <p>To create a pattern for the etching process</p> Signup and view all the answers

    What happens to the photoresist layer during the exposure process?

    <p>The photoresist layer is polymerized in the exposed areas</p> Signup and view all the answers

    What chemical is typically used for developing the photoresist layer after exposure?

    <p>Trichloroethylene (C2HCl3)</p> Signup and view all the answers

    What happens to the SiO2 layer that is not protected by the polymerized photoresist?

    <p>It is etched away by an etching solution like HCl</p> Signup and view all the answers

    How is the resist mask removed after the etching and diffusion processes?

    <p>By mechanical abrasion and chemical solvents like sulphuric acid</p> Signup and view all the answers

    What is the primary function of the input resistor (Ri) in an inverting amplifier circuit?

    <p>To convert the input voltage to an input current</p> Signup and view all the answers

    What is meant by the term 'virtual ground' in the context of an inverting amplifier circuit?

    <p>The inverting input terminal has a very low impedance</p> Signup and view all the answers

    Why is it said that the input current (Iin) cannot enter the op-amp in an inverting amplifier circuit?

    <p>The op-amp has an infinite input impedance</p> Signup and view all the answers

    What is the purpose of the feedback resistor (Rf) in an inverting amplifier circuit?

    <p>To set the gain of the amplifier</p> Signup and view all the answers

    In an inverting amplifier circuit, what is the relationship between the input voltage (Vin) and the output voltage (Vout)?

    <p>Vout = -(Rf/Ri) * Vin</p> Signup and view all the answers

    What is the primary advantage of using an inverting amplifier configuration compared to a non-inverting amplifier configuration?

    <p>Higher input impedance</p> Signup and view all the answers

    In the simplified instrumentation amplifier design, what is the result of shorting the resistances labelled R1 and removing Rg?

    <p>It creates a full series negative feedback path, and the gain of A1 and A2 becomes unity.</p> Signup and view all the answers

    What is the gain of the practical instrumentation amplifier circuit using the μA 741 op-amp?

    <p>10</p> Signup and view all the answers

    How can the gain of the practical instrumentation amplifier circuit be made variable?

    <p>Replace Rg with a potentiometer.</p> Signup and view all the answers

    Which op-amp IC is suggested as a good choice for a compact instrumentation amplifier circuit?

    <p>LM324</p> Signup and view all the answers

    What is the maximum supply voltage that can be used for the LM324 op-amp IC in the instrumentation amplifier circuit?

    <p>$\pm 16\text{V}$ DC</p> Signup and view all the answers

    What is the primary advantage of using an active filter over a passive filter?

    <p>Active filters can provide signal amplification.</p> Signup and view all the answers

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