Low-, Band-, and High-Pass Single Supply Multiple Feedback Filter

This is Low-, Band-, and High-Pass Single Supply Multiple Feedback Filter circuit. This circuit uses MFB topology, which has some advantages and disadvantages. The advantages of MFB topology are low cost, easy to implement and very versatile. The disadvantage of MFB topology is it has complex calculation. This circuit uses a unity gain Butterworth, so the circuit will give a […]

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Shutdown Schemes for MAX1044/ICL7660

This is a Shutdown Schemes of MAX1044/ICL7660. Additional capacitive loading on the OSC pin of the device will reduce the oscillator frequency, so we should be aware when using the circuit. Compared with other circuits, the first circuit has the least loading on the OSC pin. Using a high or low logic level this circuit has the added advantage of […]

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Paralleling MAX1044 Devices

This is a circuit of Paralleling devices using MAX1044. This circuit can be used to increase current capability and reduce output resistance. In this circuit capacitor C1 is used as pump and C2 used as reservoir that serves all devices. Here is the circuit : The output resistance is defined by following equation : Rout=Rout of MAX1044 or ICL7660s/n [Source: […]

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INA159 Dual-Polarity, Bidirectional Current-Shunt-Monitor Circuit

This is a INA159 Dual-Polarity, Bidirectional Current-Shunt-Monitor Circuit. This circuit uses OPA340 because it has near rail-to-rail input and output swing ranges that allow the output voltage of the circut to approach 0 and 5V. The gain of OPA340 is set to +100 and the INA159 gain is +0.2V/V. This circuit has gain of +20V/V. Here is the circuit : […]

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