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Related Concept Videos

Switching of BJT01:22

Switching of BJT

Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are reverse-biased. The...
Bipolar Junction Transistor01:22

Bipolar Junction Transistor

Bipolar Junction Transistors (BJTs) are essential elements in electronic circuits, playing a crucial role in the functionality of amplifiers, memories, and microprocessors. These transistors can be designed as NPN or PNP based on their doping patterns. They consist of three layers: the emitter, base, and collector. The configuration of these layers and their respective doping levels—with N-type or P-type impurities—define the transistor's type and its operational characteristics.
The structure...
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
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Schottky Barrier Diode01:27

Schottky Barrier Diode

Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
MOSFET01:16

MOSFET

The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
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Voltage Doubler Circuit01:23

Voltage Doubler Circuit

A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.

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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
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Published on: February 27, 2019

Electro-optic branching-waveguide switch with low drive voltage.

M Haruna, T Hibi, J Koyama

    Optics Letters
    |September 1, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Researchers demonstrate a low-voltage optical branching-waveguide switch in Z-cut Lithium Niobate (LiNbO3). This device achieves a 10-dB extinction ratio with only +/-6.5 V, significantly reducing power requirements for optical switching applications.

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    Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

    Published on: January 29, 2013

    Area of Science:

    • Photonics and Optical Engineering
    • Materials Science
    • Electrical Engineering

    Background:

    • Optical switches are crucial components in telecommunications and integrated photonics.
    • Traditional Lithium Niobate (LiNbO3) devices often require high drive voltages, limiting their power efficiency and integration.
    • Developing low-voltage switching solutions is essential for next-generation optical networks.

    Purpose of the Study:

    • To experimentally and theoretically investigate a low-voltage-driven optical branching-waveguide switch.
    • To optimize device design for reduced operational voltage.
    • To evaluate the performance metrics, including extinction ratio and scattering loss.

    Main Methods:

    • Fabrication of single-mode branching-waveguide switches in Z-cut LiNbO3.
    • Experimental testing of device performance under varying drive voltages.
    • Theoretical analysis and simulation of optical mode behavior at the branching point.
    • Measurement of extinction ratio and scattering loss at a wavelength of 0.6328 microm.

    Main Results:

    • A 10-microm-wide branching-waveguide switch achieved a 10-dB extinction ratio at a low drive voltage of +/-6.5 V.
    • A narrower 4-microm-wide switch required a higher drive voltage of +/-40 V for similar performance.
    • Scattering loss of the guided mode at the branching point was quantified at 1.3 dB.

    Conclusions:

    • Low-voltage operation is achievable for optical branching-waveguide switches in Z-cut LiNbO3.
    • Device width significantly influences the required drive voltage.
    • The presented device offers a promising solution for efficient and low-power optical switching.