This circuit was found in a 1965 US documentation. The circuit converts a DC signal to a 400 Hz AC signal. Transformer data was not provided.
This very low power amplifier is designed by Amperex for hearing aids. It is based on TAA370 which is...
This interesting automotive alarm was found in a 90's Popular Electronics. The circuit uses...
This circuit converts sinusoidal signals to square. The upper limit of frequency is abour 100 kHz...