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Power for the optional THS4509 operational amplifier is supplied by banana jacks J9 and J11. If the amplifier is being evaluated, 5 V is supplied to J9 and J11 is connected to ground. Otherwise, these inputs may be left unconnected.
请教图中VS-的供电是-5V吗？但是我从THS4509的手册上得知它有两种模式：1、VS+-VS-=+5V,2、VS+-VS-=+3V，而且我通过做实物，提供VS+为5V，VS-为-5V，实测时VS+为5V，VS-引脚为0V，请问这里面的问题是什么呢，谢谢各位的回答！
