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  • Differential Amplifier | 41-page Design Guide

    Differential Amplifier | 41-page Design Guide

    How do you go from a simple differential pair to the input stage of an operational amplifier? This 41-page guide is designed to answer exactly that question. The guide takes a progressive learning approach, starting with the simplest transistor differential amplifier and gradually introducing more advanced circuit techniques. The PDF includes: * Various differential amplifier…

  • Differential amplifiers are at the heart of analog electronics

    Differential amplifiers are at the heart of analog electronics

     – But many beginners never get the opportunity to build one – That’s why I designed this basic differential amplifier as a learning exercise. The schematic is intended as a beginner-friendly introduction to differential amplifiers for anyone learning the fundamentals of analog electronics. The design is currently a theoretical first version. My next step is…

  • BJT Monostable Multivibrator – Schematic and Build

    BJT Monostable Multivibrator – Schematic and Build

    – and a Design Detail You Might Have Missed – When the trigger pulls the base of the second transistor low, the first transistor switches on and its collector falls rapidly from nearly Vcc to almost 0 V. BUT: The timing capacitor between the collector of Q1 and the base of Q2 cannot change its…