Fairview Microwave Blog
What is a VCO?
Voltage Controlled Oscillators (VCOs) are essential elements in a wide range of applications that require frequency variation based controllable signals. Examples of this include phase locked loops (PLLs), frequency modulators, radar, and frequency hopping remote access technology. The basic operation of a VCO is to output a frequency that is dependent on an externally accessible control input....
What is a PLL (Phase-locked-loop)?
Phase-locked-loops (PLLs) are important components in many radio communication links and test equipment that rely on quality internal signals. PLLs are used in local oscillator (LO) circuits and RF Frequency Synthesizers that are designed to maintain precision frequency stability. In essence, a PLL provides a controlled output signal that is the comparison of the phase of a reference signal to...