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Arbitrary signal generator for driving ultrasonic transducers

Imported: 23 Feb '17 | Published: 22 Oct '02

Timothy J Savord, Robert K. O'Toole, Richard F Dillman, Douglas Rosich, Ronald Dennis Gatzke

USPTO - Utility Patents

Abstract

An arbitrary waveform generator includes an arithmetic element that can access samples from a waveform sample memory and adjust values accessed from the waveform sample memory to modify waveform power or amplitude. In an illustrative embodiment of the arbitrary waveform generator, the arithmetic element is a multiplying digital-to-analog converter (DAC) that has a first input connection for receiving digitized waveform samples and has a second input connection for receiving a reference signal. An output signal from the multiplying DAC is a mathematical product of the digitized waveform samples and the reference signal. In one example, a reference digital-to-analog converter (DAC) generates the reference signal. In some examples, the digitized waveform samples are digitized samples of an analog waveform signal. In some examples, the arithmetic element is incorporated into the arbitrary waveform generator in a manner to maintain transmit signal resolution over a full range of transmit power settings.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

These and other objects and advantages of the invention will become apparent and more readily appreciated from the following description of the preferred embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a block diagram of a multi-channel phased array ultrasound imaging system in accordance with the preferred embodiments of the present invention.

FIG. 2 is a block diagram of a multi-channel phased array ultrasound imaging system, showing one channel in detail, in accordance with a first preferred embodiment of the present invention.

FIG. 3 is a block diagram of a multi-channel phased array ultrasound imaging system, showing one channel in detail, in accordance with a second preferred embodiment of the present invention.

Claims

1. A transmitter circuit for a transducer in an ultrasound system, the transmitter circuit comprising:

2. A transmitter circuit according to claim 1 wherein the arithmetic unit includes a multiplying digital-to-analog converter.

3. A transmitter circuit according to claim 2 wherein:

4. A transmitter circuit according to claim 2 wherein:

5. A transmitter circuit according to claim 2 wherein:

6. A transmitter circuit according to claim 2 wherein:

7. A transmitter circuit according to claim 1 further comprising:

8. A transmitter circuit according to claim 1 wherein the arithmetic unit includes:

9. A transmitter circuit according to claim 8 wherein:

10. A transmitter circuit according to claim 1 further comprising:

11. A transmitter circuit according to claim 10 wherein:

12. A transmitter circuit according to claim 10 further comprising:

13. A transmitter circuit according to claim 1 wherein the control circuit includes:

14. A transmitter circuit according to claim 13 wherein the control circuit further includes:

15. A transmitter circuit according to claim 1 further comprising:

16. A transmitter circuit according to claim 15 wherein:

17. A transmitter circuit according to claim 15 wherein:

18. A transmitter circuit according to claim 15 wherein:

19. A transmitter circuit according to claim 15 wherein:

20. A transmitter circuit according to claim 15 wherein:

21. A transmitter circuit according to claim 7 wherein:

22. A transmitter circuit for a transducer in an ultrasound system, the transmitter circuit comprising:

23. A transmitter circuit for a transducer in an ultrasound system, the transmitter circuit comprising:

24. A transmitter circuit for a transducer in an ultrasound system, the transmitter circuit comprising:

25. A method of forming a wave signal for production by a transducer in an ultrasound system, the method comprising:

26. A method of forming a wave signal for production by a transducer in an ultrasound system, the method comprising:

27. A method of forming an acoustic signal for output by a transducer in an ultrasound system, the method comprising: