US 12,136,809 B2
Three-output DC voltage supply with bi-stable latch short-circuit protection
Frank Warnes, Milton Keynes (GB)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Sep. 7, 2022, as Appl. No. 17/939,834.
Claims priority of application No. 2112856 (GB), filed on Sep. 9, 2021.
Prior Publication US 2023/0076965 A1, Mar. 9, 2023
Int. Cl. H02H 7/00 (2006.01); H02H 7/20 (2006.01); H03K 17/687 (2006.01)
CPC H02H 7/205 (2013.01) [H03K 17/6871 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A three-output DC voltage supply for providing a positive, an intermediate, and a negative voltage supply comprising:
a positive DC voltage bus and a negative DC voltage bus configured to be connected to a DC power source;
a first voltage divider connected between the positive DC voltage bus and the negative DC voltage bus, wherein the first voltage divider includes a voltage-setting component and a resistive component; and
a short-circuit protection component including first and second transistors of opposite types connected between the voltage-setting component and the resistive component, wherein
a base of the first transistor is connected to a collector of the second transistor to define a first base/collector node,
a base of the second transistor is connected to a collector of the first transistor to define a second base/collector node, and
the intermediate voltage supply is provided by either the first or the second base/collector node.