Patent ID: 6801148
Filing Date: 2004-10-05
Classification: G01S,H03M

Abstract:
A method of creating an ultrasonic image in an ultrasonic imaging system, such method comprising the steps of:retrieving a delta-sigma modulated transmit signal stream; delaying at least some samples of the transmit signal stream to form a steered beam; converting the at least some samples into an analog sample stream; buffering the analog sample stream and driving a plurality of transducer elements with the buffered analog signal stream; detecting an end of the transmit signal stream; switching a plurality of multiplexers to receive a plurality of return analog signal streams from the transducer elements; delta-sigma modulating the return analog signal streams to form a plurality of digital signal streams; dynamically delaying the digital signal streams; summing the delayed digital signal streams; basebanding and filtering the dynamically delayed digital signal stream.