Passive Components Blog
No Result
View All Result
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    TDK Increases Current Ratings of Automotive Thin-Film Power Inductors

    Sumida Announces New DC Common Mode Choke Coil Series

    KYOCERA AVX Releases New 3dB Hybrid Couplers

    SCHURTER Unveils High Voltage Fuses for EV Applications

    YAGEO Releases First to Market 750V Aluminum Capacitors

    binder Introduces M9 Compact Circular Connector

    Smolteks CNF-MIM Capacitors Meet Thermal and Voltage Stability Industry Requirements

    Wk 26 Electronics Supply Chain Digest

    Learn How Supercapacitors Enhance Power System in Knowles eBook

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Accelerating Full Bridge LLC Resonant Converter Design with Frenetic AI

    Understanding Switched Capacitor Converters

    Coupled Inductors Circuit Model and Examples of its Applications

    Inductor Resonances and its Impact to EMI

    Highly Reliable Flex Rigid PCBs, Würth Elektronik Webinar

    Causes of Oscillations in Flyback Converters

    How to design a 60W Flyback Transformer

    Modeling and Simulation of Leakage Inductance

    Power Inductor Considerations for AI High Power Computing – Vishay Video

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    TDK Increases Current Ratings of Automotive Thin-Film Power Inductors

    Sumida Announces New DC Common Mode Choke Coil Series

    KYOCERA AVX Releases New 3dB Hybrid Couplers

    SCHURTER Unveils High Voltage Fuses for EV Applications

    YAGEO Releases First to Market 750V Aluminum Capacitors

    binder Introduces M9 Compact Circular Connector

    Smolteks CNF-MIM Capacitors Meet Thermal and Voltage Stability Industry Requirements

    Wk 26 Electronics Supply Chain Digest

    Learn How Supercapacitors Enhance Power System in Knowles eBook

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Accelerating Full Bridge LLC Resonant Converter Design with Frenetic AI

    Understanding Switched Capacitor Converters

    Coupled Inductors Circuit Model and Examples of its Applications

    Inductor Resonances and its Impact to EMI

    Highly Reliable Flex Rigid PCBs, Würth Elektronik Webinar

    Causes of Oscillations in Flyback Converters

    How to design a 60W Flyback Transformer

    Modeling and Simulation of Leakage Inductance

    Power Inductor Considerations for AI High Power Computing – Vishay Video

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
No Result
View All Result
Passive Components Blog
No Result
View All Result

Role of Capacitors in External Defibrillators

3.9.2024
Reading Time: 3 mins read
A A

This article based on Knowles Precision Devices blog explains role of capacitors in external defibrillators.

Defibrillators are designed to deliver electric current to the heart, in the form of a controlled shock to the myocardium, to treat arrhythmias and restore the heartbeat back to normal. 

RelatedPosts

Learn How Supercapacitors Enhance Power System in Knowles eBook

Role of High-Q Ceramic Filters to Overcome GNSS Jamming

Knowles Extends Range and Performance of C0G MLCC Capacitors

Capacitors play an important role in the function of these life-saving devices. Here, we’ll cover the basic components of a defibrillator circuit and explore the role of capacitor selection in defibrillator system design. 

In its simplest form, a defibrillator circuit includes a capacitor, transformer, rectifier and inductor (Figure 1). The transformer serves the charging process by increasing the voltage from hundreds to thousands of volts to deliver the desired energy output.

Voltage is converted to direct current (DC) via the rectifier, which allows current to flow unidirectionally to charge the capacitor. Once charged, paddles are applied to a patient’s chest to complete the circuit. The inductor is responsible for maintaining current flow for several milliseconds to properly treat the patient. 

Figure 1. A defibrillator circuit in its simplest form

Defibrillation leverages monophasic or biphasic waveforms to ensure effective treatment with minimal myocardial damage (Figure 2). Biphasic waveforms are more common in modern systems. With this approach, defibrillation delivers a shock in two directions, rather than one, by reversing polarity mid-cycle. Truncated exponential biphasic waveforms discharge the capacitor through the patient with a normal exponential decay that’s reversed using switches on a timing circuit. 

Figure 2. Monophasic and biphasic waveforms leveraged in defibrillation

The instantaneous power required for defibrillation isn’t supported by a typical mains electricity supply, so you need an adjustable or step-up transformer to convert mains voltage alternating current (AC) to high-voltage AC. From there, it’s converted to high-voltage DC via the rectifier. Variable voltage step-up transformers allow physicians to select the adequate charge to suit the patient. 

The Role of Capacitors in External Defibrillators 

Capacitors are responsible for storing a large amount of electrical charge and releasing it quickly into the patient, and effective treatment depends on that charge/discharge process. Capacitor specifications impact pulse size and shape as well as overall system form factor and reliability.  

Knowles’ Cornell Dubilier brand high-reliability film capacitors for external defibrillators are designed using extensive process validation and rigorous quality testing to ensure a long product lifetime and complete traceability. With a small form factor, the defibrillator film capacitors are ideally suited for portable defibrillation equipment. 

Source: Knowles Precision Devices

Related

Recent Posts

YAGEO Releases First to Market 750V Aluminum Capacitors

30.6.2025
20

Smolteks CNF-MIM Capacitors Meet Thermal and Voltage Stability Industry Requirements

30.6.2025
10

Learn How Supercapacitors Enhance Power System in Knowles eBook

30.6.2025
6

TDK Releases Industry First 1uF 100V X7R MLCCs in 1608 Case

27.6.2025
13

YAGEO Extends Lifetime of its Aluminum SMD Chip Capacitors to 5500hrs at 125C/Ur

27.6.2025
17

Murata Releases Worlds First 10µF/50V Automotive MLCC in 0805 Size

26.6.2025
44

Vishay Expands Automotive High Frequency Thin Film Chip Resistors

26.6.2025
23

Advancements and Applications of Switch Capacitor Power Converters

25.6.2025
30

Samsung Delivers Silicon Capacitors to Marwell AI Systems

24.6.2025
57

Stackpole Releases Low VCR High Voltage Chip Resistors

23.6.2025
14

Upcoming Events

Jul 23
13:00 - 14:00 CEST

PCB design for a Smartwatch

Jul 29
16:00 - 17:00 CEST

Impact of Elevated Voltage and Temperature on Molded Power Inductors in DC/DC converters

View Calendar

Popular Posts

  • Buck Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Boost Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Flyback Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • What is a Dielectric Constant and DF of Plastic Materials?

    4 shares
    Share 4 Tweet 0
  • LLC Resonant Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Ripple Current and its Effects on the Performance of Capacitors

    3 shares
    Share 3 Tweet 0
  • How to Design an Inductor

    0 shares
    Share 0 Tweet 0
  • Dual Active Bridge (DAB) Topology Explained

    0 shares
    Share 0 Tweet 0
  • SEPIC Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Why Low ESR Matters in Capacitor Design

    0 shares
    Share 0 Tweet 0

Newsletter Subscription

 

Passive Components Blog

© EPCI - Leading Passive Components Educational and Information Site

  • Home
  • Privacy Policy
  • EPCI Membership & Advertisement
  • About

No Result
View All Result
  • Home
  • Knowledge Blog
  • Premium Suppliers

© EPCI - Leading Passive Components Educational and Information Site

This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.
Go to mobile version