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1. WO2022023577 - DEVICE AND SYNCHRONOUS METHOD FOR SUPPLYING POWER TO AN ULTRASOUND TRANSDUCER

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Publication Number WO/2022/023577
Publication Date 03.02.2022
International Application No. PCT/EP2021/071505
International Filing Date 30.07.2021
IPC
H03F 3/187 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
181Low-frequency amplifiers, e.g. audio preamplifiers
183with semiconductor devices only
187in integrated circuits
H03F 3/217 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
21with semiconductor devices only
217Class D power amplifiers; Switching amplifiers
H03F 3/68 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
68Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
A61B 8/00 2006.1
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
8Diagnosis using ultrasonic, sonic or infrasonic waves
B06B 1/02 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
BGENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
1Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency
02making use of electrical energy
CPC
A61B 8/00
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
8Diagnosis using ultrasonic, sonic or infrasonic waves
B06B 1/0253
BPERFORMING OPERATIONS; TRANSPORTING
06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
BMETHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, ; e.g.; FOR PERFORMING MECHANICAL WORK IN GENERAL
1Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
02making use of electrical energy
0207Driving circuits
0223for generating signals continuous in time
0238of a single frequency, e.g. a sine-wave
0246with a feedback signal
0253taken directly from the generator circuit
B06B 2201/76
BPERFORMING OPERATIONS; TRANSPORTING
06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
BMETHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, ; e.g.; FOR PERFORMING MECHANICAL WORK IN GENERAL
2201Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
70Specific application
76Medical, dental
H03F 2200/261
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
261Amplifier which being suitable for instrumentation applications
H03F 2200/351
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
351Pulse width modulation being used in an amplifying circuit
H03F 2200/378
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
378A variable capacitor being added in the output circuit, e.g. collector, drain, of an amplifier stage
Applicants
  • UNIVERSITE PARIS-SACLAY [FR]/[FR]
  • CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE [FR]/[FR]
Inventors
  • ZHANG, Ming
  • LLASER, Nicolas
Agents
  • IPAZ
Priority Data
FR200813730.07.2020FR
Publication Language French (fr)
Filing Language French (FR)
Designated States
Title
(EN) DEVICE AND SYNCHRONOUS METHOD FOR SUPPLYING POWER TO AN ULTRASOUND TRANSDUCER
(FR) DISPOSITIF ET PROCÉDÉ SYNCHRONE D'ALIMENTATION D'UN TRANSDUCTEUR ULTRASONORE
front page image
Abstract
(EN) The invention relates to a method and a circuit (100) for driving and for supplying power to ultrasound transducers with a synchronous switched capacitor, controlled by a digital loop. This circuit (100) comprises a power interface (106) controlled by a multi-level square-wave or rectangular-wave signal generator (102). This device comprises a tuning circuit (104) that is controlled by a tuning control circuit (109) so as to exhibit a given natural frequency with the transducer. This matching typically comprises, at input, a series inductor (L1) and, at output, a controlled-connection (K1) capacitor (C1) connected in parallel with the transducer (302). This connection (K1) is controlled in accordance with a detected phase difference (Δφ12) observed between the input (φ1) and the output (φ2) of said inductor (L1). It is advantageously slaved so as to provide a phase difference with the value π/2. The invention furthermore relates to an ultrasound element, to an ultrasound head, and to an ultrasound imaging and/or processing system, in particular a medical one.
(FR) L'invention se rapporte à un procédé et circuit (100) de pilotage et d'alimentation de transducteurs ultrasonores à capacité commutée synchrone, contrôlé par boucle numérique. Ce circuit (100) comprend une interface de puissance (106) commandée par un générateur de signal carré ou rectangulaire multi-niveaux (102). Ce dispositif comprend un circuit d'accordage (104) qui est commandé par un circuit de commande d'accordage (109) pour présenter, avec le transducteur, une fréquence propre déterminée. Typiquement, cette adaptation comprend en entrée une inductance (L1) en série, et en sortie une capacité (C1) à connexion commandée (K1) montée en parallèle avec le transducteur (302). Cette connexion (K1) est commandée selon une différence de phase détectée (Δφ12) constatée entre l'entrée (φ1) et la sortie (φ2) de ladite inductance (L1). Elle est avantageusement asservie pour fournir une différence de phase valant π/2. L'invention se rapporte en outre à un élément ultrasonique, une tête ultrasonique, et un système ultrasonique d'imagerie et/ou de traitement, notamment médical.
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