phoenixsong"Discrete" means it doesn't use any ICs like opamps, only "discrete" components like resistors, capacitors, transistors, etc. This is not a discrete design. ICs are much, much better than they were 30 years ago, so that from an objective standpoint (ie, measurement-based design), it doesn't make sense to do a fully discrete design.
phoenixsong@phoenixsong It's not fully discrete, nor is it fully integrated. Kind of a hybrid.
@shimage is correct. Many ICs are much better than fully discrete circuitry due to the precision same-wafer matching inherent in IC fabrication, and due to the latest process technology and best analog designers.
Most discrete components by contrast were designed decades ago using old tech, and don't benefit from the precision matching.