Pulse width modulator (PWM)  is both quite important and typical application of the functional generator. PWM modulators are frequently used in power supply sources/converters (DC-DC, AC-DC) and high-efficient audio amplifiers (D class) for example.
Presented functional generator requires only one active element and really low number of external passive elements (one capacitor only) and moreover it provides outputs (square and triangle wave) in both voltage and current form.
Vrba, "Design of Z copy controlled-gain voltage differencing current conveyor based adjustable functional generator", Microelectronics Journal, vol.
He says the last payment, 2 million USD, was sent ten days ago.Abu Sissi told PNN that if the conditions remain as such the Gaza power plant may loss its last reaming functional generator
."Stopping the generator like this damage it, because of the Israeli siege we do not have spare parts to fix it or service it." Abu Sissi said.