201623 ⎘
Fixed transformers or mutual inductances of the signal type Audio-frequency transformers or mutual inductances, i.e. not suitable for handling frequencies considerably beyond the audio range
Adjustable compact line output converter with amplifier trigger
#2Recursive audio modulation system using nested inductor arrays
#3Compact noise suppression circuit for small speakers
#4Planar audio amplifier output inductor with current sense
#5Transmission coil system and remote control for a hearing aid