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Split Power Supply

Often a circuit requires a power supply that provides negative voltage as well as positive voltage. By reversing the direction of the diode and the capacitor (if it is polarized), the half-wave rectification circuit with low-pass filter provides a negative voltage. Similarly, reversing the direction of the diodes and capacitor in the full-wave rectified supply produces a negative voltage supply. A split power supply is shown in figure 4.9.

Figure 4.9:  Split power supplies.

Doug Gingrich
Tue Jul 13 16:55:15 EDT 1999