This circuit is from the Motorola Linear Databook of 1990 and can be implemented with other operational amplifiers. The power supply must be symmetrical.
This is one of many zero crossing detector that can be found in this section. It was found in...
A VCO or VCF [Voltage to Frequency Converter] can be built using part of a 4048 [PLL] circuit. The...
High performance 16 A Buck regulators capable of operating at 2.7 to 4.8 V voltages and 0.25 to...