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

AM Modulators

Square law modulator, switching modulator circuits.

Darshan N

Updated: 19 March 2026

4 min read

AM Modulators Quiz

Test your knowledge of square law and switching modulator circuit operation and analysis.

Question 1 of 3

Q1.In a square law modulator, the device characteristic is approximated as y(t) = a1x(t) + a2x(t)^2, where x(t) = Accos(2pifct) + m(t). After squaring, which term in the expansion directly produces the AM (DSB-FC) signal component?

AM DSB-SC

Suppressed carrier, balanced modulator, power saving.

9 min read

AM Power Relations

Carrier power, sideband power, modulation efficiency.

10 min read

AM Frequency Spectrum

Carrier, upper and lower sidebands, bandwidth.

6 min read

AM DSB-FC

Double sideband full carrier, classic AM generation.

7 min read

Amplitude Modulation Basics

Definition, modulation index, time domain equation.

9 min read

VSB Modulation

AM Demodulators

Contents

AM Modulators

AM Modulators Quiz

Q1.In a square law modulator, the device characteristic is approximated as y(t) = a1x(t) + a2x(t)^2, where x(t) = Accos(2pifct) + m(t). After squaring, which term in the expansion directly produces the AM (DSB-FC) signal component?

Related Articles

AM DSB-SC

AM Power Relations

AM Frequency Spectrum

AM DSB-FC

Amplitude Modulation Basics

Contents

AM Modulators Quiz

Q1.In a square law modulator, the device characteristic is approximated as y(t) = a1*x(t) + a2*x(t)^2, where x(t) = Ac*cos(2*pi*fc*t) + m(t). After squaring, which term in the expansion directly produces the AM (DSB-FC) signal component?

Related Articles

AM DSB-SC

AM Power Relations

AM Frequency Spectrum

AM DSB-FC

Amplitude Modulation Basics

Q1.In a square law modulator, the device characteristic is approximated as y(t) = a1x(t) + a2x(t)^2, where x(t) = Accos(2pifct) + m(t). After squaring, which term in the expansion directly produces the AM (DSB-FC) signal component?