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Related Concept Videos

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.
In an n-MOSFET, the structure includes n-type source and drain...
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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MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
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Light Acquisition02:16

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
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MOSFET Amplifiers01:17

MOSFET Amplifiers

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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Single Molecule Fluorescence Microscopy on Planar Supported Bilayers
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Published on: October 31, 2015

CMOS Image Sensor with a Built-in Lane Detector.

Pei-Yung Hsiao1, Hsien-Chein Cheng, Shih-Shinh Huang

  • 1Department of Electrical Engineering, National University of Kaohsiung, Kaohsiung, Taiwan, ROC.

Sensors (Basel, Switzerland)
|May 11, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces a new Complementary Metal-Oxide-Semiconductor (CMOS) imager that captures images and generates vehicle lane maps. This compact, low-cost chip achieves high lane recognition rates, enhancing automotive safety systems.

Keywords:
CMOSGaussian filterImage sensorcurrent-modeintelligent transportation systemslane detectionpeak-finding algorithmphotodiode

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Area of Science:

  • Electronics and Electrical Engineering
  • Computer Vision
  • Automotive Technology

Background:

  • Current vehicle lane detection systems often rely on complex and expensive processing units like RISC or DSP chips.
  • Existing systems may require separate Analog to Digital Converter (ADC) circuits, increasing system size and cost.
  • There is a need for integrated, cost-effective imaging solutions for intelligent automotive safety features.

Purpose of the Study:

  • To develop a novel current-mode mixed-signal CMOS imager capable of simultaneous image capture and vehicle lane map generation.
  • To create a compact, low-cost chip that integrates lane detection capabilities, reducing the need for external processing units.
  • To enhance the feasibility of intelligent automotive lane departure warning systems through an innovative component chip.

Main Methods:

  • Development of a modified lane detection algorithm optimized for hardware implementation within a CMOS imager.
  • Design of a current-mode mixed-signal CMOS imager architecture.
  • Integration of image capture and lane mapping functionalities onto a single chip, eliminating the need for external ADC circuits.

Main Results:

  • The developed CMOS imager achieves a lane recognition rate of approximately 96% across diverse weather conditions.
  • The proposed imager functions as a compact, lower-cost key component, bypassing the need for PC-based or expensive embedded systems.
  • The chip is designed for seamless integration into intelligent automotive lane departure systems.

Conclusions:

  • The developed current-mode mixed-signal CMOS imager offers a highly accurate and efficient solution for real-time vehicle lane detection.
  • This integrated chip represents a significant advancement in cost-effective automotive sensing technology.
  • The imager's capabilities pave the way for more widespread adoption of advanced driver-assistance systems (ADAS).