Overview:
DDR memory increases system speed by simultaneously timing the data on both edges of the clock, resulting in higher data transfer speeds. Because of high frequency operation, termination resistors are required to reduce voltage reflections. Termination losses can be minimized by connecting voltages with the same half supply voltage at one end. This power supply needs to be able to output or draw current while also having a high crossover frequency to minimize capacitor requirements. If the increased power dissipation is within acceptable limits, the linear regulator method of terminating the power supply can save cost and reduce size.
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