Example image of eyePlorer eyePlorer map for 'Phase-locked loop': Control system Phase (waves) Signal (electronics) Oscillation Negative feedback Computer Radio Telecommunication Microprocessor Integrated circuit Musical tuning Beat (acoustics) Pitch pipe Tuning fork Direct-conversion receiver Edwin Howard Armstrong Homodyne detection Superheterodyne receiver Electronic oscillator Signetics CMOS Feedback Frequency divider Quantization error Voltage-controlled oscillator Low-pass filter Phase detector Pulse swallowing counter Overshoot (signal) Derivative High-pass filter Integral Phase margin Frequency mixer Finite-state machine Phase Frequency Detector Charge pump Integrator Jitter Q factor Diode Semiconductor Varicap Piezoelectricity Surface acoustic wave Ring oscillator Frequency synthesizer List of trigonometric identities Radian Second