This circuit was obtained from an 80's Radio Electronics. The circuit decodes “scrambled” or sinusoidal encoded signals by providing an audio signal at the output.
Other series operationals such as the LM258, LM358 and LM2904 can be used on this circuit of the...
We find this circuit in a 2005 Linear Technology manual. The circuit applies to higher current DC...
This indicator makes use of an LM339 voltage comparator circuit that contains 4 internal...