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Capacitor Switch Disclosure Number: IPCOM000057209D
Original Publication Date: 1988-Apr-01
Included in the Prior Art Database: 2005-Feb-15

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Cochrane, HL Engelbrecht, JC [+details]


Fig. 1 illustrates a circuit to isolate the current drawn by the user circuitry from the power supply because EMI resulting from the current load spikes was not sufficiently suppressed by cost effective filtering and shielding techniques. This circuit provides two output capacitor banks for the power supply. The power supply charges one capacitor bank while the user circuitry runs from the energy stored in the second capacitor bank. Semiconductor switches connected as a full bridge commutator transfer the capacitor banks between the power supply output and the user circuitry. Normally, the output of a power converter keeps an output capacitor charged to the value of the desired output voltage, and the user circuitry is connected across the capacitor (see Fig. 2). This new circuit, as shown in Fig.