This circuit has a sensitivity of 2uW. We found it in documentation from the 1980s. The integrated circuit is from that time. Equivalents can be tried.
This excellent quality transistor amplifier using Darlington transistors was found in a 1980s...
Texas Instruments TMS320F28069 Piccolo Microcontrollers provide the power of the C28x™ core and...
This circuit was found in an Electronic Design from the 90s. The integrated circuit is the LT1016, a...