Designing a Classic Transistor-VCA From Scratch

Explore the process of designing a classic transistor-based Voltage Controlled Amplifier (VCA) in this comprehensive 49-minute video tutorial. Demystify the bipolar junction transistor (BJT) and its application in a common emitter amplifier, addressing key challenges such as sample variations and temperature dependence. Delve into the differential amplifier (long-tailed pair) and learn how to implement voltage control. Follow along with a provided component list and access a working simulation. Cover topics including voltage dividers, resistors vs. transistors, emitter resistors, negative feedback, gain changing, voltage subtraction, and the final circuit design. Conclude with a sound demonstration to appreciate the practical application of the concepts learned.