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Contents

Analog Communication

Amplitude Modulation

Amplitude Modulation Basics AM Frequency Spectrum AM Power Relations AM DSB-FC AM DSB-SC AM SSB VSB Modulation AM Modulators AM Demodulators Costas Loop

Frequency Modulation

FM Basics Bessel Functions in FM Carson's Rule PM Basics Narrowband FM Indirect FM Generation Direct FM Generation FM Demodulation Basics Foster-Seeley Discriminator Ratio Detector PLL Demodulator Pre-emphasis and De-emphasis Stereo FM

Noise Analysis

Noise Taxonomy Thermal Noise White Noise Signal to Noise Ratio Noise Figure Friis Formula Equivalent Noise Temperature Noise in AM Systems Noise in FM Systems FM Threshold Extension

Receiver Architectures

Receiver Parameters TRF Receiver Superheterodyne Receiver Image Frequency Rejection Double Conversion Direct Conversion Receiver Automatic Gain Control Tracking and Alignment

Pulse Modulation

Sampling Theorem Natural vs Flat Top Sampling PAM PWM PPM PCM Basics Quantization Noise Companding Delta Modulation Adaptive Delta Modulation DPCM

Analog vs Digital

Analog vs Digital Comm Hybrid Systems Applications Transition to Digital

Other Topics

Communication Channels Link Budget FDM TDM Television Basics

Other Subjects

Analog Electronics Digital Electronics Signals & Systems Control Systems Electromagnetic Theory Digital Communication Network Analysis Microprocessors VLSI Design Verilog HDL Power Electronics Embedded Systems DSP Electronic Devices

Section Progress63%

5 of 8 articles

Double Conversion

Two IF stages for selectivity and image rejection.

Updated: 19 March 2026

8 min read

Double Conversion Quiz

Test your knowledge of dual-conversion superheterodyne architecture and its selectivity-image rejection tradeoff.

Question 1 of 3

Q1.A double-conversion receiver uses two IF stages. The first IF is chosen to be high, and the second IF is chosen to be low. The reason for this arrangement is:

Related Articles

TRF Receiver

Tuned Radio Frequency receiver, selectivity issues.

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Receiver Parameters

Sensitivity, Selectivity, Fidelity.

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Superheterodyne Receiver

Mixer, IF amplifier, image frequency.

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Tracking and Alignment

Local oscillator padding, trimming.

8 min read

AM DSB-FC

Double sideband full carrier, classic AM generation.

7 min read

Image Frequency Rejection

Direct Conversion Receiver