You can buy single-chip PGAs. Visit e.g. Programmable & variable gain amplifiers (PGAs & VGAs). However, here we are going to build one. Don't worry 🙂 Just hit Alt ...

Abstract: This letter presents a 300-GHz-band power amplifier (PA) module implementing a PA integrated circuit (IC) fabricated in 250-nm indium phosphide (InP) double-heterojunction bipolar transistor ...

If you've never heard of a 'DAC' before, you might be surprised to hear that you most likely use one everyday. DAC stands for digital-to-analogue converter and any device that delivers digital sound – ...