"Practical guide to electronic amplifiers basics, simplified design, audio-frequency, radio-frequency, intermediate frequency, video frequency, direct-coupled, compound, differential, Op-amp/OTA, tests, troubleshooting"@en . . . "Practical guide to electronic amplifiers : basics, simplified design, audio-frequency, radio-frequency, intermediate frequency, video frequency, direct-coupled, compound, differential, Op-amp/OTA, tests, troubleshooting" . "Practical guide to electronic amplifiers : Basics, simplified design, audio frequency, radio frequency. intermediate frequency, video frequency, direct-coupled, compound, differential, Op-amp/OTA, tests, troubleshooting" . "Practical guide to electronic amplifiers" . . . . . . . . . . . . .