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Related Concept Videos

Characteristics of OpAmp01:17

Characteristics of OpAmp

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The operational amplifier, commonly known as an op-amp, is a specially designed electronic circuit component. Its purpose is to work in conjunction with other circuit elements to execute a defined signal-processing operation. Consider an equivalent circuit model of an op-amp, as depicted in Figure 1; the output section comprises a voltage-controlled source in parallel with the output resistance Ro.
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MOSFET Amplifiers

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The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
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Cascaded Op Amps01:16

Cascaded Op Amps

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Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
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Integrator and Differentiator01:13

Integrator and Differentiator

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Op-amp circuits have significant applications in various fields, including automotive engineering. One such application is cruise control systems in cars, where op-amp circuits are integral for maintaining a constant speed. In these systems, op-amps function as both integrators and differentiators.
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The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations when external components like resistors and capacitors are linked to its terminals. An op-amp has the capacity to sum signals, amplify a signal,...
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Inverting and Non-inverting OpAmps

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Acousto-optic modulators integrated on-chip.

Jared Beller1, Linbo Shao2

  • 1Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA, 24061, USA.

Light, Science & Applications
|July 29, 2022
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Summary

Researchers developed on-chip acousto-optic devices using radio frequency mechanical waves to efficiently manipulate light for integrated photonic circuits.

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Area of Science:

  • Photonics
  • Acousto-optics
  • Integrated circuits

Background:

  • Acousto-optic devices are essential for light manipulation in optical systems.
  • Current devices face limitations in miniaturization and efficiency for integrated applications.

Purpose of the Study:

  • To integrate acousto-optic devices onto a chip.
  • To enhance the efficiency of acousto-optic manipulation of light in photonic circuits.

Main Methods:

  • Development of on-chip acousto-optic devices.
  • Utilizing radio frequency mechanical waves for light modulation.

Main Results:

  • Successful integration of acousto-optic functionality on a chip.
  • Demonstrated increased efficiency in light manipulation for integrated photonic circuits.

Conclusions:

  • On-chip acousto-optic devices offer a pathway to more efficient integrated photonic circuits.
  • This advancement is critical for the future of optical computing and communication.