Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Multiple level transmitter and method of transmitting

a multi-level transmitter and transmitter technology, applied in the direction of pulse train generators, mechanical vibration separation, instruments, etc., can solve the problem of limited control of the transmit energy spectrum

Inactive Publication Date: 2005-11-03
PETERSEN DAVID A +1
View PDF14 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention is about methods and devices for generating multilevel transmit waveforms. Different voltages are combined using switches to control the amplitude and polarity, resulting in a transmit waveform with more than two voltage levels. The invention can be implemented using a simple switching pulser without a power amplifier or by connecting multiple transformers in series with a transducer element. The technical effects of the invention include improved waveform accuracy, reduced power consumption, and improved efficiency in data transmission."

Problems solved by technology

Simple switching pulsers avoid dissipation associated with linear output amplifiers, but provide limited control of the transmit energy spectrum.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multiple level transmitter and method of transmitting
  • Multiple level transmitter and method of transmitting
  • Multiple level transmitter and method of transmitting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] A multilevel transmit waveform or pulse, such as a waveform with three, four or more non-zero amplitudes, is generated by superposition of a plurality of input voltages. In one embodiment, a transformer with three or more magnetic flux paths superposes magnetic flux in one of the paths from the plurality of other paths. In another embodiment, voltages generated at secondary windings of a plurality of transformers connected in series are summed. The superposition of either embodiment provides a multilevel output transmit waveform.

[0019]FIG. 1A shows a transformer of one embodiment for superposing magnetic flux. To generate a transmit pulse in response to a fixed set of input levels, the transformer 10 includes a ferrite core 12 with three or more separate flux paths 14, 16, 18, a secondary winding 20, and primary windings 22 and 24. Additional, different or fewer windings and flux paths may be provided.

[0020] The core 12 comprises a ferrite core or other magnetic core materi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Transmitters for generating multilevel transmit waveforms for medical diagnostic ultrasound are provided. Voltages from a plurality of sources are superposed or summed. Switches control the amplitude and polarity of the summed voltages so that a transmit waveform having four or more, such as nine, voltage levels is provided. A simple switching pulser without a power amplifier combines voltages applied to two or more flux paths in a third flux path. Superposition of magnetic flux in the third flux path provides for an output voltage responsive to the sum and difference of two different voltages. Alternatively or additionally, the secondary windings of multiple transformers are connected in series with a transducer element. By providing different input voltages to each of the transformers, the multilevel transmit waveform is generated.

Description

BACKGROUND [0001] The present invention relates to generating waveforms. In particular, the invention relates to a transmit and receive circuit for an ultrasound system. [0002] Short, high-energy transmit waveforms drive ultrasound transducers for diagnostic medical imaging. The transmit waveforms are generated by switching pulsers. Simple switching pulsers avoid dissipation associated with linear output amplifiers, but provide limited control of the transmit energy spectrum. For example, simple bipolar or unipolar waveforms are generated. [0003] U.S. Pat. Nos. 6,083,164 and 6,050,945 disclose transmit and receive circuitry using switching pulsers. FIG. 14 of U.S. Pat. No. 6,083,164 discloses two switches S1, S2 connected to primary windings with a voltage source. The secondary winding of the transformer achieves a positive or negative voltage value for generating a bipolar waveform at the transducer element. With an extra primary winding, associated switches and different source vo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): B06B1/02A61B8/00B06B3/00B06B3/04G03B42/06H04B1/02H04L5/04H04L25/49H04R17/00
CPCH04L25/4917H04L5/04
Inventor PETERSEN, DAVID A.PHELPS, ROBERT N.
Owner PETERSEN DAVID A
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com