This circuit uses an amplifier from National Semiconductor, uncommon nowadays. The numbers in parentheses are for the second channel. The circuit is suitable for old tape recorders.
The quiescent current of this alarm is in the order of microamps and the same is true for the...
This circuit is from a 2005 Linear Technology publication. It converts current into load sensing...
This circuit can operate in a 100 dB range with signals of up to 100 MHz frequencies. Similar...