Suggested by Amperex in 1968, this circuit is intended for hearing aids. The integrated circuit used, a TAA370 is not common today.
This RF signal meter has a switch position that allows calibration and comparison of low intensity...
April 2017 - Texas Instruments bq51222 integrated circuit for chargers and other Qi wireless power...
We found this circuit in an American 1980s documentation. The circuit can be easily assembled in our...