One by one, Apple is squeezing long term partners out of its supply chain, threatening to leave a trail of corpses. But could Qualcomm be one of them? Reports indicate that Dialog Semiconductor may face a similar existential crisis to that of Imagination Technologies, if Apple is developing its own power management chips inhouse (see below). That would see the iPhone maker extending its control over the components – and bill of materials – of its mobile devices. But even Apple cannot start from scratch in the modem area. While it is appears to be trying to cut its ties with Qualcomm, by working with Intel and possibly MediaTek, and by hurling lawsuits (see below), it may shoot itself in…