lock on frequency
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Frequency-locked loop — A frequency lock, or frequency locked loop (FLL), is an electronic control system that generates a signal that is locked to the frequency of an input or reference signal. This circuit compares the frequency of a controlled oscillator to the… … Wikipedia
Lock-in amplifier — A lock in amplifier (also known as a phase sensitive detector) is a type of amplifier that can extract a signal with a known carrier wave from extremely noisy environment (S/N ratio can be as low as 60 dB or even lessFact|date=December 2007). It… … Wikipedia
Frequency comb — A frequency comb is the graphic representation of the spectrum of a mode locked laser. An octave spanning comb can be used for mapping radio frequencies into the optical frequency range or it can be used to steer a piezoelectric mirror within a… … Wikipedia
Frequency synthesizer — A frequency synthesizer is an electronic system for generating any of a range of frequencies from a single fixed timebase or oscillator. They are found in many modern devices, including radio receivers, mobile telephones, radiotelephones, walkie… … Wikipedia
Frequency compensation — In electrical engineering, frequency compensation is a technique used in amplifiers, and especially in amplifiers employing negative feedback. It usually has two primary goals: To avoid the unintentional creation of positive feedback, which will… … Wikipedia
Frequency multiplier — A frequency multiplier is commonly used in a radio receiver or radio transmitter to multiply the base frequency of the oscillator by a predetermined number. This multiplied frequency is then amplified and sent to the final drive stage and into… … Wikipedia
lock on — i. One of the operating modes of most air interception radar. When the pencil beam, after having searched and found the target, remains pointing at the target and continues tracking it automatically, it is said to “lock on.” ii. In phase lock… … Aviation dictionary
SIM lock — A SIM lock, simlock, network lock or subsidy lock is a capability built into GSM phones by mobile phone manufacturers. Network providers use this capability to restrict the use of these phones to specific countries and network providers.… … Wikipedia
Electronic lock — A quick demonstration of an electronic door lock An electronic lock (more precisely an electric lock) is a locking device which operates by means of electric current. Electric locks are sometimes stand alone with an electronic control assembly… … Wikipedia
Omega Lock — The Omega Lock (called the Chip Square in Galaxy Force ) is a device in the cartoon series that, along with the Cyber Planet Keys, is needed to stop the black hole which threatens to consume Cybertron and the entire universe. The Omega Lock was… … Wikipedia
Phase Frequency Detector — A phase frequency detector, in electronics, is a device which compares the phase of two input signals. It has two inputs which correspond to two different input signals, usually one from a voltage controlled oscillator (VCO) and another from some … Wikipedia
