[introduction] in us in the tutorial about weaveform, we studied the weaveform of different type, express ” weaveform basically is scale what the voltage to time foundation or electric current change is intuitionistic express ” . Generally speaking, undee to communication, this level base line represents the 0 requirements of voltage or electric current. The tension that any portions of 0 axes upper part represent the level to flow along a direction or electric current are located in in communication weaveform.

Periodic (T) is undee from the time length that begins to repeat place to use to the end (it is an unit with the second) . This also can call the pulse width of the periodic time of sine wave weaveform or square wave.

Frequency (F) is undee in one second time paragraph inside reduplicative frequency. Frequency is the reciprocal (of time cycle F = 1/T) , frequency unit is hertz (Hz) .

Extent (A) is with volt or ampere the extent of the signal weaveform that measures for the unit or intensity.

In us in the tutorial about weaveform, we studied the weaveform of different type, express ” weaveform basically is scale what the voltage to time foundation or electric current change is intuitionistic express ” . Generally speaking, undee to communication, this level base line represents the 0 requirements of voltage or electric current. The tension that any portions of 0 axes upper part represent the level to flow along a direction or electric current are located in in communication weaveform.

Same, be located in a level any undee portions of 0 axes lower part represent edge and the voltage that the way with opposite way flows or electric current. Normally, undee to sine communication, the figure of the undee appearance of 0 axes upper part and its lower part is same. However, communicate signal to most blame power (include frequency weaveform) , the circumstance is not always is such.

Electric the periodic signal weaveform that sees with electronic project middling is sine weaveform. However, communication communication weaveform always may not use the flowing figure that is based on trigonometry sine or cosine function. Communication weaveform also can use the figure of square wave or compound wave, trigonometry wave, following place are shown.

The type of periodic weaveform

Periodic communication is undee

Communication is undee from half considerate the time that lose half weeks and returns 0 base line to finish place of a whole pattern to need again calls a cycle, a complete cycle is included half-period and negative half-period. The time that weaveform finishs a complete and periodic place to cost calls undee periodic time, use a symbol ” T ” express.

The complete periodicity of the generation inside one second (periodic / second) call frequency, communicate undee symbolic F namely. Frequency with hertz ( Hz ) undertake metrical for the unit, with German physicist sea Yinlixi Heci (the name of Heinrich Hertz) names.

Next we can see, periodic (oscillation) , periodic time and frequency (every second periodicity) between existence concerns, accordingly, if there is F inside one second periodic, criterion every cycle must cost 1/f second ability to finish.

Communication is undee from half considerate the time that lose half weeks and returns 0 base line to finish place of a whole pattern to need again calls a cycle, a complete cycle is included half-period and negative half-period. The time that weaveform finishs a complete and periodic place to cost calls undee periodic time, use a symbol ” T ” express.

The complete periodicity of the generation inside one second (periodic / second) call frequency, communicate undee symbolic F namely. Frequency with hertz ( Hz ) undertake metrical for the unit, with German physicist sea Yinlixi Heci (the name of Heinrich Hertz) names.

Next we can see, periodic (oscillation) , periodic time and frequency (every second periodicity) between existence concerns, accordingly, if there is F inside one second periodic, criterion every cycle must cost 1/f second ability to finish.

The relation of frequency and periodic time

The relation of frequency and periodic time

Communicate No1 of undee give typical examples

1.How much is the periodic time of 50Hz weaveform; 2. How much is the communicates weaveform frequency that periodic time is 10mS.

1) .

Periodic time

2) .

Frequency

Frequency goes with ” every second periodicity ” abbreviate is ” Cps ” will express, but commonner nowadays unit is ” hertz ” . To family expenses power source, frequency is 50Hz or 60Hz, specific depend on country / area, spend a decision by the rotate speed coming back of the dynamo. But one hertz is a very small unit, because this uses prefix to state more high frequency rate issues undee quantitative class, for example KHz, MHz even GHz.

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