The FM modulator circuit (frequency modulation) is built with a Motorola MC1648P oscillator. Two varactors, Motorola MV-209 are used to frequency modulate the oscillator. The 5000 Ω potentiometer is ...

In modern communication systems, modulation is a key function that embeds the baseband signal (information) into a carrier wave so that it can be successfully broadcasted through a medium such as air ...

Abstract: Photoplethysmoggraphy (PPG) is a non-invasive technique used to detect blood volume changes in the microvascular bed of issues. It is commonly used in wearable devices and medical monitoring ...