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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 Progress9%

1 of 11 articles

Sampling Theorem

Nyquist rate, aliasing, reconstruction.

Updated: 19 March 2026

12 min read

Sampling Theorem Quiz

Test your understanding of the Nyquist-Shannon sampling theorem and its application to band-limited signals.

Question 1 of 3

Q1.A signal contains frequency components up to 4 kHz. What is the minimum sampling frequency required to avoid aliasing?

Related Articles

Sampling Theorem

Nyquist rate fs >= 2fm, band-limited signals.

8 min read

PWM

Pulse Width Modulation, generation and detection.

9 min read

PPM

Pulse Position Modulation.

8 min read

PCM Basics

Pulse Code Modulation, quantization levels.

7 min read

PAM

Pulse Amplitude Modulation.

6 min read

Tracking and Alignment

Natural vs Flat Top Sampling