US Patent 10107901 Acoustic signal phase rotation processor

An ultrasound imaging system includes a plurality of processing chains (2061, . . . , 206K) for a plurality of transducer element channels (1081, . . . , 108K). A processing chain of the plurality of processing chains, includes: a phase rotation processor (1141, . . . , 114K) that focuses an N-bit digital representation, of an analog RF signal received on the corresponding transducer element channel, through phase rotation through phase additions or subtractions, and outputs a focused N-bit quantized value, where N is a predetermined positive integer.