A nonsinusoidal waveform, commonly encountered in electronics and signal processing, that alternates regularly and instantaneously between two levels
Output waveform generated by very basic, low-cost UPSs Functions adequately for less sensitive loads, but may not provide acceptable quality input for some types of electronic equipment Standby Power System - See Off-Line UPS
A wave shape that rises instantaneously to a constant value that is maintained for a set time interval, after which it instantaneously falls to a new value The term "square" wave is a misnomer since, invariably, the wave shape produced is rectangular and not strictly square
A rectangular waveform that alternates between a positive value and a negative value Its frequency spectrum includes all of the odd harmonics and has higher harmonic content than a triangle wave
A rectangular wave output waveform having a 50% symmetry If specified, the tolerance to the symmetry must be specified TTL, LSTTL, CMOS and HCMOS outputs are described as square wave and comply to the wave form drawing at right
A waveform that jumps sharply but evenly from one extreme value to the next |_|"|_|"|
A geometrical waveform typically generated by an oscillator Waveform Harmonic Structure Hear Me (8k) It is a special case of pulse wave, where the mark/space ratio is 1: 2 It has only the odd numbered (1, 3, 5, 7, etc ) harmonic partials The amplitude of each harmonic is the reciprocal of its number in the series (i e the 3rd harmonic is a 3rd the amplitude of the 1st ) It has a buzzy but mellow timbre very similar to that of a clarinet See also Pulse Wave, Ramp Wave, Sine Wave, Triangle Wave
An electromagnetic wave that oscillates between two voltage states, theoretically requiring no time to accomplish a state transition
A wave that has two significant conditions, i e , two levels of amplitude, that change from one condition to the other in a relatively short time compared to the wavelength Note: When the instantaneous amplitude is plotted versus time or distance, the waveform has a rectangular shape [From Weik '89]
A periodic wave that alternately assumes one of two fixed values (high and low) with the transition time between these two levels being negligible
A rectangular-shaped (step-function) periodic wave with a positive and negative half-cycle of equal lengths of time or duration A square wave consists of a sine wave's fundamental frequency combined with the odd harmonics (multiples) of its fundamental frequency