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FR2236331A1 - Speed regulation of electro-mechanical transducers - dynamically annuls apparent resistance by introducing resistance - Google Patents

Speed regulation of electro-mechanical transducers - dynamically annuls apparent resistance by introducing resistance

Info

Publication number
FR2236331A1
FR2236331A1 FR7318436A FR7318436A FR2236331A1 FR 2236331 A1 FR2236331 A1 FR 2236331A1 FR 7318436 A FR7318436 A FR 7318436A FR 7318436 A FR7318436 A FR 7318436A FR 2236331 A1 FR2236331 A1 FR 2236331A1
Authority
FR
France
Prior art keywords
resistance
annuls
electro
dynamically
voltage
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.)
Granted
Application number
FR7318436A
Other languages
French (fr)
Other versions
FR2236331B3 (en
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.)
RODIER MICHEL
Original Assignee
RODIER MICHEL
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 RODIER MICHEL filed Critical RODIER MICHEL
Priority to FR7318436A priority Critical patent/FR2236331A1/en
Publication of FR2236331A1 publication Critical patent/FR2236331A1/en
Application granted granted Critical
Publication of FR2236331B3 publication Critical patent/FR2236331B3/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

The method ensures that the control of speed to by voltage control, whilst cancelling the influence of real resistance (1) in these systems without using a feedback loop. To cancel the effect of real resistance (1) a negative resistance (7) is placed in series with the real resistance. To obtain the effect of negative resistance (7) a voltage (U2) proportional to the output current of an amplifier is introduced in phase at the amplifier input. The voltage is independent of frequency and the resonance of the capacitor (3) and coil (4) effectively reduces the voltage (U4) to zero. The method may be used for low inertial systems such as vibration motors.
FR7318436A 1973-05-16 1973-05-16 Speed regulation of electro-mechanical transducers - dynamically annuls apparent resistance by introducing resistance Granted FR2236331A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7318436A FR2236331A1 (en) 1973-05-16 1973-05-16 Speed regulation of electro-mechanical transducers - dynamically annuls apparent resistance by introducing resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7318436A FR2236331A1 (en) 1973-05-16 1973-05-16 Speed regulation of electro-mechanical transducers - dynamically annuls apparent resistance by introducing resistance

Publications (2)

Publication Number Publication Date
FR2236331A1 true FR2236331A1 (en) 1975-01-31
FR2236331B3 FR2236331B3 (en) 1976-05-14

Family

ID=9119693

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7318436A Granted FR2236331A1 (en) 1973-05-16 1973-05-16 Speed regulation of electro-mechanical transducers - dynamically annuls apparent resistance by introducing resistance

Country Status (1)

Country Link
FR (1) FR2236331A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0221324A1 (en) * 1985-10-07 1987-05-13 Studer Revox Ag Signal transducer
WO1992022385A1 (en) * 1991-06-14 1992-12-23 Halcro Nominees Pty. Ltd. Ultrasonic vibration generation and use

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0221324A1 (en) * 1985-10-07 1987-05-13 Studer Revox Ag Signal transducer
WO1992022385A1 (en) * 1991-06-14 1992-12-23 Halcro Nominees Pty. Ltd. Ultrasonic vibration generation and use

Also Published As

Publication number Publication date
FR2236331B3 (en) 1976-05-14

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Legal Events

Date Code Title Description
ST Notification of lapse