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Related Concept Videos

Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
Multi-input and Multi-variable systems01:22

Multi-input and Multi-variable systems

Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence of...

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Related Experiment Video

Updated: Jun 20, 2026

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

Photorefractive parallel matrix-matrix multiplier.

J Hong, P Yeh

    Optics Letters
    |September 25, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel parallel matrix-matrix multiplier utilizing photorefractive crystals and mutually incoherent laser sources. This optical approach enables parallel grating formation for matrix multiplication.

    Related Experiment Videos

    Last Updated: Jun 20, 2026

    Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
    06:25

    Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

    Published on: February 12, 2014

    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Computational Science

    Background:

    • Matrix multiplication is a fundamental operation in scientific computing.
    • Efficient hardware for matrix multiplication is crucial for high-performance computing.
    • Photorefractive materials offer unique optical properties for data processing.

    Purpose of the Study:

    • To demonstrate a novel optical parallel matrix-matrix multiplier.
    • To explore the use of photorefractive crystals for optical matrix operations.
    • To leverage mutually incoherent laser sources for parallel processing.

    Main Methods:

    • Utilizing a photorefractive crystal as the processing medium.
    • Employing an array of mutually incoherent laser sources.
    • Writing a complex set of gratings in parallel within the crystal.

    Main Results:

    • Successfully demonstrated the operation of the parallel matrix-matrix multiplier.
    • The spatial modulation of the laser array directly formed the matrix-matrix product.
    • Parallel grating formation achieved the desired optical computation.

    Conclusions:

    • The photorefractive crystal-based optical multiplier is a viable approach for parallel matrix operations.
    • Mutually incoherent laser sources are effective for parallel optical data processing.
    • This method offers a new pathway for high-speed matrix computation.