This circuit detects when a signal reaches its peak value. The source must be symmetrical and equivalent operational amplifiers can be used. This circuit was found in an old European publication.
Taiyo Yudem SAW filters can be ordered from Mouser Electronics for UMST (W-DMA), GSM, CDMA, LTE,...
This simple circuit consists of an oscillator that can be activated both by the action of NO and...
This circuit was found in a Radio Electronics Constructor, English magazine from April 1976; The...