• Home
  • About Us
  • Contact Us
Semiconductor for You
  • Home
  • Semiconductor News
  • Technology
    • Automotive
    • Consumer Electronics
    • IoT
    • Lighting
    • Power Management
    • Wireless
    • Personal Electronics
    • Hardware & Software
    • Research
    • Medical Electronics
    • Embedded Design
    • Aerospace & Defence
    • Artificial Intelligence
  • DIY Projects
  • Market
  • Industries
    • Renesas Electronics
  • Knowledge Base
  • Events
  • Tools
    • Resistor Color Code Calculator
No Result
View All Result
  • Home
  • Semiconductor News
  • Technology
    • Automotive
    • Consumer Electronics
    • IoT
    • Lighting
    • Power Management
    • Wireless
    • Personal Electronics
    • Hardware & Software
    • Research
    • Medical Electronics
    • Embedded Design
    • Aerospace & Defence
    • Artificial Intelligence
  • DIY Projects
  • Market
  • Industries
    • Renesas Electronics
  • Knowledge Base
  • Events
  • Tools
    • Resistor Color Code Calculator
No Result
View All Result
Semiconductor for You
No Result
View All Result
Home Knowledge Base

Working of Superheterodyne Radio Receiver

Nikita Bisen by Nikita Bisen
September 13, 2022
in Knowledge Base
0

The superheterodyne radio was one of the most successful forms of radio being used almost exclusively as the RF circuit design topology of choice until recent years.

  • It works on the principle of heterodyning which simply means mixing.
  • The superheterodyne radio receiver mixes the received signal frequency with the frequency of the signal generated by a local oscillator.

Working of Superheterodyne Receiver

  • The incoming signal of the superheterodyne receiver goes through the antenna and is filtered to reject the image frequency and then amplified by the RF amplifier.
  • RF amplifier amplifies a particular carrier frequency within the AM broadcast range.
  • The selected frequency and two sidebands are allowed to go through the amplifier.
  • The carrier of the received signal is called radio frequency carrier and its frequency is radio frequency ƒRF and the local oscillator signal operates at ƒOSC.
  • Then this amplified RF frequency is mixed with the local oscillator frequency.
  • The mixer combines these two signals which produce the sum and difference of frequency signals of the incoming carrier signal and local oscillator signal, which are ƒOSC+ƒRF and ƒOSC-ƒRF.
  • The (fOSC+fRF) sum of frequency is rejected by the filter and the remaining difference frequency (ƒOSC-ƒRF ) signal which is a down-converted frequency signal is called an intermediate frequency (IF) carrier (ƒIF= ƒOSC-ƒRF ).
  • The original carrier signal and the IF carrier signal of the modulation is the same and it has a fixed frequency of 455kHz which is amplified by one or more stages of amplification.
  • The IF amplifier amplified the IF signal which raises its level for the information extraction process.
  • The IF amplifier fulfills the gain and bandwidth requirements of the receiver.
Block Diagram of Superheterodyne Radio Receiver
  • The detector received the amplified IF signal to detect the information signal component from 455 kHz IF, to reproduce the original information data, which is generally in the form of the audio signal.
  • The detector stage is used to eliminate one of the sidebands which are still present and separates the RF from the audio components of the other sideband.
  • The RF component is filtered out and audio is applied to the audio stages for amplification.
  • The amplified audio signal is then applied to the AF amplifier to increase the audio frequency level of the signal and to provide enough gain to drive the speaker or headphones.
  • A speaker is connected to the AF amplifier to play the audio information signal.
  • The superheterodyne receiver is Automatic gain control (AGC) which is given to the RF, IF and mixer stages to generate constant output irrespective of the varying input signal.

Advantages of Superheterodyne Radio Receiver

  • It operates at a low signal level.
  • The mixer provides fixed frequency operations.
  • Provides excellent selectivity and sensitivity.
  • Good sensitivity: The super heterodyne format allowed for good levels of sensitivity to be reached when compared to various other types of radio receiver. Although other formats now offer comparable levels of sensitivity, the superhet was well ahead of others like the TRF, etc. in the early days of wireless communications.

Disadvantages of Superheterodyne Radio Receiver

  • Overall system cost is increased as additional circuits are used.
  • The issue of picture frequency is one of the superheterodyne receiver’s main drawbacks.
  • An image frequency is an unwanted input frequency that is equal to the station frequency plus (or minus) twice the intermediate frequency in heterodyne receivers.

Applications of Superheterodyne Radio Receiver

  • It is used in various places like Television, Radio receivers, commercial radios.
  • A radio receiver known as a superheterodyne, or superhet for short, employs frequency mixing to change a received signal’s carrier frequency into a fixed intermediate frequency (IF) that can be processed more easily.
Content Protection by DMCA.com
Nikita Bisen

Nikita Bisen

Browse by Category

  • Aerospace and Defence
  • Articles
  • Automotive
  • Consumer-Electronics
  • Hardware & Software
  • Interview
  • IoT
  • Knowledge Base
  • Lighting
  • Market
  • personal-electronics
  • Power Management
  • Research
  • Semiconductor Events
  • Semiconductor News
  • Technology
  • Wireless
Semiconductor for You

Semiconductor For You is a resource hub for electronics engineers and industrialist. With its blend of
technology features, news and new product information, Semiconductor For You keeps designers and
managers up to date with the fastest moving industry in the world.

Follow Us

Browse by Category

  • Aerospace and Defence
  • Articles
  • Automotive
  • Consumer-Electronics
  • Hardware & Software
  • Interview
  • IoT
  • Knowledge Base
  • Lighting
  • Market
  • personal-electronics
  • Power Management
  • Research
  • Semiconductor Events
  • Semiconductor News
  • Technology
  • Wireless

Recent News

Research for the “digital ear” of the future

Research for the “digital ear” of the future

February 1, 2023
Dual Digital Interface, Multi-Channel LED Driver from Diodes Incorporated Addresses RGB and Single-Color Solid-State Lighting

Dual Digital Interface, Multi-Channel LED Driver from Diodes Incorporated Addresses RGB and Single-Color Solid-State Lighting

January 31, 2023
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2022 Semiconductor For You

No Result
View All Result
  • Home
  • Semiconductor News
  • Technology
    • IoT
    • Wireless
    • Power Management
    • Automotive
    • Hardware & Software
  • Market
  • Knowledge Base
  • Tools
    • Resistor Color Code Calculator

© 2022 Semiconductor For You

We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
Cookie settingsACCEPT
Manage consent

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
CookieDurationDescription
cookielawinfo-checbox-analytics11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checbox-functional11 monthsThe cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checbox-others11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-necessary11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-performance11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy11 monthsThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytics
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Others
Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
SAVE & ACCEPT