This filter that rejects a frequency range determined by the double-T was found in the August 1993 Electronics Now magazine. The source must be symmetrical.
The LDO series (Low Dropout) TPS80 from Texas Instruments (www.ti.com) can provide output voltages...
Suggested by an American publication, this circuit has 5 operating conditions indicated in the...
Found in a documentation from the 70s, this circuit can be implemented today with ease. The relay...