Vasily Ivanenko has written up documentation on his Radionova 1 frequency synthesizer project: Frequency synthesizer for my Jupiter receiver — Радионова 1 — [ Radionova 1 ] Greetings! Most of my future homebrew radio projects will focus on building radio astronomy gear. Radio astronomy offers much fun + learning for the radio homebuilder — example topics include […]
Tag Archives: PLL
Simple CMOS FSK modem
Dilshan Jayakody writes: This project is about 4046 PLL base simple FSK modem. Under given configuration this modem send digital signals over two frequencies and which is switching around 378kHz and 226kHz. In this system, modulator uses VCO of 4046, and demodulator is based on close loop mode of 4046 phase comparator and external LPF […]
A basic introduction to Phase Locked Loops
Kenneth was curious about Phase Locked Loops so he decided to dive into them. PLLs generate an output signal that is phase-synchronized to an input signal. They are widely used in telecommunication, radio, and computer systems. One place we commonly find PLLs is the frequency multiplier circuit inside microcontrollers. The inevitable next step was to […]