This is a commercial circuit from the year 1958. Transistors are germanium types and transformers and coils are hard to fild today. The circuit is destinated to the reception of medium wave stations.
This sensitive amplifier for low current measurement uses a differential amplifier configuration with...
The circuit bellow shows how four inverters [NAND, NOR or Inverters] Kim - This could be NAND,...
The Texas Instruments OPAx145 Series of Operational Amplifiers is available from Mouser...