FR2373194A1 - Transistor switch for ultrasonic array - includes series opposed transistors in each path shunted by diodes - Google Patents

Transistor switch for ultrasonic array - includes series opposed transistors in each path shunted by diodes

Info

Publication number
FR2373194A1
FR2373194A1 FR7700848A FR7700848A FR2373194A1 FR 2373194 A1 FR2373194 A1 FR 2373194A1 FR 7700848 A FR7700848 A FR 7700848A FR 7700848 A FR7700848 A FR 7700848A FR 2373194 A1 FR2373194 A1 FR 2373194A1
Authority
FR
France
Prior art keywords
diodes
transistor switch
ultrasonic array
includes series
transistors
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7700848A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of FR2373194A1 publication Critical patent/FR2373194A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
    • G10K11/341—Circuits therefor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/68—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors specially adapted for switching ac currents or voltages

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Electronic Switches (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The transistor switch controls the operation of an array of ultrasonic senders and receivers. Each switching path includes a similar transistor switch circuit. At least two bipolar transistors (T1, T2) are connected in opposite senses in each switching gap, so that, depending on the signal polarity, one transistor is normally conducting, and the other is inversely conducting. Diodes (D1, D2) are in parallel with the transistors, whose polarity is opposite to that of the normally conducting transistor.
FR7700848A 1976-12-06 1977-01-13 Transistor switch for ultrasonic array - includes series opposed transistors in each path shunted by diodes Withdrawn FR2373194A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762655237 DE2655237C3 (en) 1976-12-06 1976-12-06 Switching device with transistors

Publications (1)

Publication Number Publication Date
FR2373194A1 true FR2373194A1 (en) 1978-06-30

Family

ID=5994795

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7700848A Withdrawn FR2373194A1 (en) 1976-12-06 1977-01-13 Transistor switch for ultrasonic array - includes series opposed transistors in each path shunted by diodes

Country Status (2)

Country Link
DE (1) DE2655237C3 (en)
FR (1) FR2373194A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928295B2 (en) * 1979-12-24 1984-07-12 株式会社 日立メディコ Switch circuit for excitation of ultrasonic transducer
JPS58172019A (en) * 1982-04-01 1983-10-08 Nec Corp Semiconductor switch circuit
JPS605136A (en) * 1983-06-24 1985-01-11 株式会社日立製作所 Ultrasonic tomographic apparatus
DE3404741C2 (en) * 1984-02-10 1986-11-13 Standard Elektrik Lorenz Ag, 7000 Stuttgart Semiconductor switch for switching an alternating voltage

Also Published As

Publication number Publication date
DE2655237C3 (en) 1980-01-10
DE2655237B2 (en) 1979-05-17
DE2655237A1 (en) 1978-06-08

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Legal Events

Date Code Title Description
ST Notification of lapse