Power Failure Detection Trigger Memory Saving

Sometimes the power goes down and we unable to save memory content. When the power goer down, the memory save circuit can be used to save memory content. This is a very useful circuit because the AC line dropout detection is not worthy. The difference of dropout voltage from two regulators is a basic of this circuit. This circuit uses […]

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Digitally Controlled Negative Voltage Supply

Despite the popularity of single-supply ICs, a negative control voltage is still required by some applications. Modern, inverted R-2R ladder DAC and op amp is the solution for this purpose. This approach offers lower supply voltages, higher speed, and smaller packages when compared with older DACs containing standard R-2R ladders. An output swing from 0V to 2.5V is produced by […]

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