| 摘要 |
A negative voltage power supply multiplexing apparatus is provided to minimize a noise and a heat by distributing load to multiplexed paths equally. A negative voltage power supply multiplexing apparatus includes transistor units(101,103), and voltage control units(110,150). The transistor units receive a negative voltage of a predetermined range through an input terminal, and a predetermined control signal. The transistor units output a negative voltage and a current of a size corresponding to the control signal. The voltage control units receive a feedback for an output voltage of the transistor unit and compare the received feedback signal with a reference voltage. The voltage control units output the control signal to output the negative voltage of a predetermined size, detect a size of the current outputted from the transistor units, and output load sharing common signal. Input/output terminals of a plurality of blocks are formed as a common node. The voltage control units adjust the control signal to supply the same current as other block if a detected current is small based on the load sharing common signal outputted from the voltage control unit of the other block.
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