초록 ▼

A power supply comprising a DC-DC converter which comprises (a) a first transformer (11); (b) a second transformer (12); (c) a first H-bridge switching circuit (13) for selectively connecting a primary DC source (14) to the primary winding of said first transformer; (d) a second H-bridge (15)

A power supply comprising a DC-DC converter which comprises (a) a first transformer (11); (b) a second transformer (12); (c) a first H-bridge switching circuit (13) for selectively connecting a primary DC source (14) to the primary winding of said first transformer; (d) a second H-bridge (15) switching circuit for selectively connecting said primary DC source (14) to the primary winding of said second transformer (12); (e) a bridge rectifier circuit (16) connected to the secondary windings of said first and second transformers; and (f) a control circuit (17) for providing sets of control pulses for effecting switching of switching elements of the first and the second H-bridge switching circuits (13, 15).

대표청구항 ▼

A power supply comprising a DC-DC converter which comprises (a) a first transformer (11); (b) a second transformer (12); (c) a first H-bridge switching circuit (13) for selectively connecting a primary DC source (14) to the primary winding of said first transformer; (d) a second H-bridge (15)

A power supply comprising a DC-DC converter which comprises (a) a first transformer (11); (b) a second transformer (12); (c) a first H-bridge switching circuit (13) for selectively connecting a primary DC source (14) to the primary winding of said first transformer; (d) a second H-bridge (15) switching circuit for selectively connecting said primary DC source (14) to the primary winding of said second transformer (12); (e) a bridge rectifier circuit (16) connected to the secondary windings of said first and second transformers; and (f) a control circuit (17) for providing sets of control pulses for effecting switching of switching elements of the first and the second H-bridge switching circuits (13, 15). 9, 20000800, Devenport et al., 359/181; US-6120190, 20000900, Leard et al., 372/032; US-6295147, 20010900, Yamane et al., 359/110 8. The network as set forth in claim 1, wherein the printer queries other devices connected to the network concerning ability information when at least one of the following situations occur: 1) when the printer is connected to the network, 2) w