This very low power amplifier is designed by Amperex for hearing aids. It is based on TAA370 which is not an integrated circuit that can be found today.
The components of this filter are calculated using the formula given next to the diagram and it...
This circuit can be used to set the compass for walks or exercises, being small enough to be...
This amplifier for the 10 m (30 MHz) band has a gain of 12 to 15 dB having been found in an...