Chapter 24. Designing Low Voltage Op Amp Circuits
In one respect, voltage is like water: you don't appreciate its value until your supply runs low. Low voltage systems, defined here as a single power supply less than 5 V, teach us to appreciate voltage. We aren't the first electronic types to learn how valuable voltage is; over 20 years ago, the audio console design engineers appreciated the relationship between voltage and dynamic range. They needed more dynamic range to satisfy their customers; therefore, they ran op amps at the full rated voltage not the recommended operating voltage, so they could squeeze a few more decibels of dynamic range from the op amp. These engineers were willing to take a considerable risk ...