This circuit is from a documentation on the MC1539 from Motorola and may, however, be implemented with equivalent operations. The transistor also supports equivalent.
This Radio Electronics circuit, in an 80's edition, decodes the 67 kHz signal used at the time to...
We find this circuit in a manual of the 80's own used components. The circuit provides an...
This circuit is from an old publication of the 70's. It can be implemented with modern transistors like the...