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Index 211



12V/24V lead-acid battery charging circuit

Published:2011/6/23 1:35:00 Author:TaoXi | Keyword: 12V/24V, lead-acid battery, charging circuit

12V/24V lead-acid battery charging circuit
The LM339 simple lead-acid battery charging circuit is as shown in the figure, you can use two 24V lead-acid batteries as the power supply.   (View)

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BG602 charger circuit

Published:2011/6/16 22:14:00 Author:chopper | Keyword: charger circuit

BG602 charger circuit
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A3 norm power supply circuit

Published:2011/6/14 8:24:00 Author:chopper | Keyword: power supply

A3 norm power supply circuit
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The electric energy-saving lamp circuit

Published:2011/6/20 0:39:00 Author:Seven | Keyword: energy-saving lamp

The electric energy-saving lamp circuit
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The light touch switch circuit

Published:2011/6/20 0:44:00 Author:Seven | Keyword: switch circuit

The light touch switch circuit
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The single key switch circuit (2)

Published:2011/6/20 0:48:00 Author:Seven | Keyword: key switch

The single key switch circuit (2)
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The self-motivated switch stable power supply circuit (1)

Published:2011/6/16 20:28:00 Author:qqtang | Keyword: self-motivated, power supply

The self-motivated switch stable power supply circuit (1)
The self-motivated switch stable power supply circuit (1) is shown in the following figure:   (View)

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The 70v stable power supply circuit

Published:2011/6/22 2:11:00 Author:Borg | Keyword: stable, power supply

The 70v stable power supply circuit
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The 10~65V stable power supply circuit

Published:2011/6/22 1:45:00 Author:Borg | Keyword: stable power supply

The 10~65V stable power supply circuit
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The 120V regulated power supply circuit

Published:2011/6/22 1:40:00 Author:Borg | Keyword: regulated, power supply circuit

The 120V regulated power supply circuit
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The 175v regulated power supply circuit

Published:2011/6/22 3:12:00 Author:Borg | Keyword: regulated, power supply

The 175v regulated power supply circuit
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The 0~30v simple steady power supply circuit

Published:2011/6/22 3:58:00 Author:Borg | Keyword: power supply

The 0~30v simple steady power supply circuit
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The touch switch circuit composed of the phase inverter (2)

Published:2011/6/20 10:52:00 Author:Seven | Keyword: touch switch circuit, phase inverter

The touch switch circuit composed of the phase inverter (2)
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The STK4142 application circuit

Published:2011/6/20 22:09:00 Author:Seven | Keyword: application circuit

The STK4142 application circuit
The STK4142 application circuit is shown in the above figure.   (View)

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The stable single key electric switch circuit

Published:2011/6/20 0:51:00 Author:Seven | Keyword: single key, switch circuit

The stable single key electric switch circuit
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The full-bile rectifier regulated circuit

Published:2011/6/21 1:53:00 Author:Seven | Keyword: full-bile, rectifier

The full-bile rectifier regulated circuit
The full-bile rectifier regulated circuit is shown as above.   (View)

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The power supply over current protection circuit of the ring switch

Published:2011/6/16 20:16:00 Author:qqtang | Keyword: power supply, protection circuit

The power supply over current protection circuit of the ring switch
The power supply over current protection circuit of the ring switch is shown in the following circuit:   (View)

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The general power supply loading circuit with the usage of bulbs

Published:2011/6/21 22:28:00 Author:qqtang | Keyword: power supply, bulb

The general power supply loading circuit with the usage of bulbs
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Operational amplifier anti-blocking circuit

Published:2011/6/13 4:51:00 Author:Christina | Keyword: Operational amplifier, anti-blocking

Operational amplifier anti-blocking circuit
If we add the large signal or the larger interference to the reverse phase input port of the operational amplifier, the amplifier always can't work normally, and there will be the phenomenon of the signal can not enter the amplifier or the output intermittent, at this time, you must turn off the power supply then turn on again or remove the signal for a period of time, so the amplifier can return to normal. This phenomenon called the blockade or the lockout. This phenomenon is caused by: the transistor of the input stage is saturated, the reverse phase input port and output port lose the nature of the opposite phase, so the circuit changes into the positive feedback.   (View)

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Feedback circuit

Published:2011/6/13 6:50:00 Author:Christina | Keyword: Feedback

Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit
Feedback circuit

In the practical applications, we usually need to add the feedback circuit to the operational amplifier. Because the open-loop gain of the operational amplifier is high, but in the practical applications the open-loop gain of the operational amplifier is not high, so we need to add the negative feedback circuit to form the closed loop to get the corresponding functions. In addition, in the depth feedback conditions, the performance of the operational amplifier will be much better. Same-phase input feedback amplifier circuit The figure shows the same-phase input feedback amplifier circuit. We add the negative feedback resistance Rf from the output port to the reverse phase input, the input voltage is input from the same-phase port. According to the open loop voltage gain expression, we can list: Reverse phase input feedback amplifier circuit: Closed-loop gain: The negative sign of the formula means the phase position of the output voltage and the input voltage is opposite. The formula shows that as long as the AUD is large enough, the closed-loop gain of this amplifier is only decided by the ratio of the resistance Rf and resistance R1, it has nothing to do with other parameters.   (View)

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