This circuit for the 60 kHz range was found in 73 magazine and published in 1995. The circuit uses a ferrite rod. Note the direction of the coil windings.
This circuit allows the use of a common cassette to pass the tape recordings to other media with...
The integrated circuit, in this 1986 application, is not a very common component today. The...
This TTL pulse stretcher or stretcher was found in a 90's EDN. The time constant R x C1 determines...