Free Simple Circuit Diagram
This is a Very Simple circuit for Lead Acid Battery Charger using PB137 Regulator. The PB137 is used for lead acid battery charger circuit because it can give 1.5A at Vo=13.7V. The PB137 also has a reverse leakage current. The maximum reverse leakage current of PB137 is 10µA at Tj=0 to 40°C and V1=floating and Vo=13.7V. Here is the circuit […]
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This circuit is an Unity Gain Buffer. This circuit has a highest input impedance of any OP-AMP circuit. This circuit has a less gain error that is equal to common mode rejection or the reciprocal of the amplifier open-loop gain. The multiplication of the open-loop gain and the differential input impedance parallel with common mode input impedance will result the […]
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This is a high input impedance non-inverting circuit. This circuit provides a closed loop gain equal to (R1+R2)/R1. The close-loop 3 dB bandwidth of this circuit equal to the amplifier unity-gain frequency divided by the closed-loop gain. Here is the circuit : This circuit is different from an inverting circuit. The input impedance of this circuit is very high and […]
Read moreApplying the filtered and rectified AC input to a high-input-voltage linear regulator is the simplest way to produce low current level from an AC source. However, it will causes the power dissipation in the regulator. The power dissipation can be reduced by using a switching regulator but it will increases the cost if we use a switching regulator. This circuit […]
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