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參數資料
| 型號： | LMV324MX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | General Purpose, Low Voltage, Rail-to-Rail Output Operational Amplifiers |
| 中文描述： | QUAD OP-AMP, 9000 uV OFFSET-MAX, 1 MHz BAND WIDTH, PDSO14 |
| 封裝： | SOIC-14 |
| 文件頁數： | 19/27頁 |
| 文件大小： | 1151K |
| 代理商： | LMV324MX |
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Application Notes
(Continued)
When the output voltage V
O
is first at its high, V
OH
, the
capacitor C is charged toward V
OH
through R
2
. The voltage
across C rises exponentially with a time constant
τ
= R
2
C,
and this voltage is applied to the inverting input of the op
amp. Meanwhile, the voltage at the non-inverting input is set
at the positive threshold voltage (V
) of the generator. The
capacitor voltage continually increases until it reaches V
,
at which point the output of the generator will switch to its
low, V
(= 0V in this case). The voltage at the non-inverting
input is switched to the negative threshold voltage (V
) of
the generator. The capacitor then starts to discharge toward
V
exponentially through R
, with a time constant
τ
= R
C.
When the capacitor voltage reaches V
, the output of the
pulse generator switches to V
. The capacitor starts to
charge, and the cycle repeats itself.
As shown in the waveforms in
Figure 17
, the pulse width (T
1
)
is set by R
, C and V
OH
, and the time between pulses (T
) is
set by R
, C and V
. This pulse generator can be made to
have different frequencies and pulse width by selecting dif-
ferent capacitor value and resistor values.
Figure 18
shows another pulse generator, with separate
charge and discharge paths. The capacitor is charged
through R
1
and is discharged through R
2
.
Figure 19
is a squarewave generator with the same path for
charging and discharging the capacitor.
10006081
FIGURE 16. Pulse Generator
10006086
FIGURE 17. Waveforms of the Circuit in Figure 16
10006077
FIGURE 18. Pulse Generator
L
www.national.com
19
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LMV324MX/NOPB | 功能描述:運算放大器 - 運放 GEN PURP, LOW VLTG, RRO OP AMP RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| LMV324PW | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-VOLTAGE RAIL-TO-RAIL OUTPUT OPERATIONAL AMPLIFIERS |
| LMV324Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-VOLTAGE RAIL-TO-RAIL OUTPUT OPERATIONAL AMPLIFIERS |
| LMV324-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-VOLTAGE RAIL-TO-RAIL OUTPUT OPERATIONAL AMPLIFIERS |
| LMV324Q1MA/NOPB | 功能描述:運算放大器 - 運放 Auto Quad Lo-Vtg RR Output Op Amp RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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