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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.
Design Example01:23

Design Example

The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
The Cochlea01:13

The Cochlea

The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
Capacitors in Series and Parallel01:19

Capacitors in Series and Parallel

Multiple capacitors connected serve as electrical components in various applications. These multiple capacitors behave as a single equivalent capacitor, and its total capacitance depends on the capacitance of individual capacitors and the type of connections. Capacitors can be arranged in two - orientations, either in series or parallel connections.
Suppose the capacitors are connected one after the other such that the negative terminal of the first connects to the positive terminal of the...
Hair Cells01:22

Hair Cells

Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.
Equivalent Capacitance01:19

Equivalent Capacitance

Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
The following strategies are adopted to calculate...

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Related Experiment Video

Updated: Jul 7, 2026

Design and Construction of a Cost Effective Headstage for Simultaneous Neural Stimulation and Recording in the Water Maze
09:09

Design and Construction of a Cost Effective Headstage for Simultaneous Neural Stimulation and Recording in the Water Maze

Published on: October 13, 2010

Analog electronic cochlea design using multiplexing switched-capacitor circuits.

J C Bor1, C Y Wu

  • 1Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu.

IEEE Transactions on Neural Networks
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

This study introduces a novel silicon cochlea design using multiplexing switched-capacitor circuits. The efficient design mimics a real cochlea

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Postsynaptic Recordings at Afferent Dendrites Contacting Cochlear Inner Hair Cells: Monitoring Multivesicular Release at a Ribbon Synapse
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Postsynaptic Recordings at Afferent Dendrites Contacting Cochlear Inner Hair Cells: Monitoring Multivesicular Release at a Ribbon Synapse

Published on: February 10, 2011

Related Experiment Videos

Last Updated: Jul 7, 2026

Design and Construction of a Cost Effective Headstage for Simultaneous Neural Stimulation and Recording in the Water Maze
09:09

Design and Construction of a Cost Effective Headstage for Simultaneous Neural Stimulation and Recording in the Water Maze

Published on: October 13, 2010

Postsynaptic Recordings at Afferent Dendrites Contacting Cochlear Inner Hair Cells: Monitoring Multivesicular Release at a Ribbon Synapse
11:45

Postsynaptic Recordings at Afferent Dendrites Contacting Cochlear Inner Hair Cells: Monitoring Multivesicular Release at a Ribbon Synapse

Published on: February 10, 2011

Area of Science:

  • Biomedical Engineering
  • Electrical Engineering
  • Auditory Neuroscience

Background:

  • The human cochlea's complex structure and function present challenges for artificial implementations.
  • Existing artificial cochlea models often require significant chip area and are sensitive to manufacturing variations.
  • The Zwislocki transmission-line model provides a foundational framework for understanding cochlear mechanics.

Purpose of the Study:

  • To propose a new design methodology for creating a silicon cochlea.
  • To improve the efficiency and reduce the component count of artificial cochlea circuits.
  • To achieve a silicon cochlea suitable for very-large-scale integration (VLSI) with neural networks.

Main Methods:

  • Utilizing multiplexing switched-capacitor circuits for cochlear modeling.
  • Applying the Zwislocki transmission-line model as the basis for circuit design.
  • Cascading multiple fabricated chips to form a comprehensive 32-section silicon cochlea.

Main Results:

  • The designed silicon cochlea demonstrates frequency responses consistent with theoretical predictions and biological cochleas.
  • The design achieves a wide dynamic range of 67 dB per section.
  • The silicon cochlea exhibits low sensitivity to process variations, enhancing its manufacturability.

Conclusions:

  • The proposed design methodology enables the creation of compact and efficient silicon cochleas.
  • The fabricated silicon cochlea accurately replicates the behavior of a real cochlea.
  • This VLSI-compatible design is well-suited for integration with neural networks for advanced auditory prosthetics.