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參數(shù)資料
| 型號： | KA555 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | single timer |
| 中文描述： | PULSE; RECTANGULAR, TIMER, PDIP8 |
| 封裝： | DIP-8 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 148K |
| 代理商： | KA555 |
KA555
8
4. Pulse Width Modulation
The timer output waveform may be changed by modulating the control voltage applied to the timer's pin 5 and changing the
reference of the timer's internal comparators. Figure 9. illustrates the pulse width modulation circuit.
When the continuous trigger pulse train is applied in the monos table mode, the timer output width is modulated according to
the signal applied to the control terminal. Sine wave as well as other waveforms may be applied as a signal to the control
terminal. Figure 10 shows an example of pulse width modulation waveform.
5. Pulse Position Modulation
If the modulating signal is applied to the control terminal while the timer is connected for astable operation as in Figure 11, the
timer becomes a pulse position modulator.
In the pulse position modulator, the reference of the timer's internal comparators is modulated which in turn modulates the
timer output according to the modulation signal applied to the control terminal.
Figure 12 illustrates a sine wave for modulation signal and the resulting output pulse position modulation : however, any wave
shape could be used.
Figure 8. Waveforms of Frequency Divider Operation
8
4
7
1
2
3
5
6
CONT
GND
Vcc
DISCH
THRES
RESET
TRIG
OUT
+Vcc
Trigger
R
A
C
Output
Input
Figure 9. Circuit for Pulse Width Modulation
Figure 10. Waveforms of Pulse Width Modulation
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KA558 | Tantalum Molded High Reliability Capacitor; Capacitance: 68uF; Voltage: 6.3V; Case Size: 7.3x4.3 mm; Packaging: Tape & Reel |
| KA558B | Tantalum Molded High Reliability Capacitor; Capacitance: 15uF; Voltage: 10V; Case Size: 6x3.2 mm; Packaging: Tape & Reel |
| KA558BD | Quad Timer |
| KA558D2 | Quad Timer |
| KA5H0165R | Fairchild Power Switch(FPS) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KA555 | 制造商:Fairchild Semiconductor Corporation 功能描述:IC TIMER 555 DIP8 |
| KA555_Q | 功能描述:計時器和支持產(chǎn)品 Single Timer RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| KA555D | 功能描述:計時器和支持產(chǎn)品 Single RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| KA555D | 制造商:Fairchild Semiconductor Corporation 功能描述:IC TIMER SMD SOIC8 555 |
| KA555DTF | 功能描述:計時器和支持產(chǎn)品 Single Timer RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
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