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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.

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Related Experiment Video

Updated: Jun 24, 2026

Quasi-light Storage for Optical Data Packets
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Multiplexing in photonics as a resource for optical ternary content-addressable memory functionality.

Yanir London1, Thomas Van Vaerenbergh2, Luca Ramini1

  • 1Hewlett Packard Labs, 820 N McCarthy Blvd, Milpitas, CA 95035, USA.

Nanophotonics (Berlin, Germany)
|December 5, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed new photonic Content-Addressable Memory (CAM) architectures using optical multiplexing. These novel wavelength-division multiplexing (WDM) and time-division multiplexing (TDM) optical ternary CAMs (O-TCAMs) achieve high speeds, demonstrating potential for faster computing.

Keywords:
energy efficiencyintegrated photonicssilicon photonicsternary content-addressable memorytime division multiplexingwavelength division multiplexing

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Area of Science:

  • Photonics
  • Optical Computing
  • Integrated Circuits

Background:

  • Content-Addressable Memory (CAM) is crucial for high-speed data retrieval.
  • Existing electronic CAMs (E-CAMs) face limitations in speed and scalability.
  • Photonic technologies offer potential for overcoming electronic limitations.

Purpose of the Study:

  • To propose and demonstrate novel photonic Content-Addressable Memory (CAM) architectures.
  • To integrate optical multiplexing techniques with CAM encoding schemes.
  • To explore the feasibility of silicon photonic (SiPh) implementations for optical ternary CAM (O-TCAM).

Main Methods:

  • Combined a CAM encoding scheme with wavelength-division multiplexing (WDM) and time-division multiplexing (TDM).
  • Designed and implemented O-TCAMs using microring-based silicon photonic (SiPh) circuits.
  • Experimentally demonstrated O-TCAM functionality and simulated performance.

Main Results:

  • Achieved experimental O-TCAM functionality in SiPh up to .
  • Simulated feasibility for speeds up to 10 Gbps, 10x faster than E-TCAMs.
  • Identified trade-offs in energy consumption per symbol compared to E-TCAMs.

Conclusions:

  • Novel WDM and TDM O-TCAM architectures are feasible using SiPh circuits.
  • Photonic CAMs offer significant speed advantages over electronic counterparts.
  • Further research is needed to optimize energy efficiency for practical applications.