JPS55134597A - Digital microphone - Google Patents

Digital microphone

Info

Publication number
JPS55134597A
JPS55134597A JP4138979A JP4138979A JPS55134597A JP S55134597 A JPS55134597 A JP S55134597A JP 4138979 A JP4138979 A JP 4138979A JP 4138979 A JP4138979 A JP 4138979A JP S55134597 A JPS55134597 A JP S55134597A
Authority
JP
Japan
Prior art keywords
output
circuit
outputs
microphone
code
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
JP4138979A
Other languages
Japanese (ja)
Other versions
JPS606594B2 (en
Inventor
Hiroyuki Naono
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4138979A priority Critical patent/JPS606594B2/en
Publication of JPS55134597A publication Critical patent/JPS55134597A/en
Publication of JPS606594B2 publication Critical patent/JPS606594B2/en
Expired 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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/005—Details of transducers, loudspeakers or microphones using digitally weighted transducing elements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To convert microphone outputs into binary codes easily by sequentially comparing an output voltage, developed by the capacity variation of each capacitor microphone element, with different reference voltages. CONSTITUTION:When output V0 is assumed to be obtained from each capacitor microphone element 9 applied with sound pressure, the output of transducer A is compared with V0. In this case, the code output of transducer circuit A is ''1'', and code outputs of transducer circuits B and C are ''0''. Further, when the microphone output is 2V0, the output of circuit B is ''1''. Since switch SWB is closed by the output of comparing circuit 10 of this circuit B to apply reference voltage 2V0 by the adder of circuit A, circuit A outputs ''0'' and binary code outputs are ''0'', ''1'' and ''0'' respectively. Similarly, when the microphone output is 3V0, code outputs are ''0'', ''1'' and ''1'' and when 4V0, switch SWC is put into operation to generate code outputs ''1'', ''0'' and ''0''.
JP4138979A 1979-04-05 1979-04-05 digital microphone Expired JPS606594B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4138979A JPS606594B2 (en) 1979-04-05 1979-04-05 digital microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4138979A JPS606594B2 (en) 1979-04-05 1979-04-05 digital microphone

Publications (2)

Publication Number Publication Date
JPS55134597A true JPS55134597A (en) 1980-10-20
JPS606594B2 JPS606594B2 (en) 1985-02-19

Family

ID=12607016

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4138979A Expired JPS606594B2 (en) 1979-04-05 1979-04-05 digital microphone

Country Status (1)

Country Link
JP (1) JPS606594B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264850A (en) * 1991-11-12 1993-11-23 Arkay Technologies, Inc. Hand-held sound digitizer system
EP0936837A2 (en) * 1998-02-16 1999-08-18 Matsushita Electric Industrial Co., Ltd. Electroacoustic transducer of digital type
US6449370B1 (en) 1998-02-16 2002-09-10 Matsushita Electric Industrial Co., Ltd. Digital electro-acoustic transducer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264850A (en) * 1991-11-12 1993-11-23 Arkay Technologies, Inc. Hand-held sound digitizer system
EP0936837A2 (en) * 1998-02-16 1999-08-18 Matsushita Electric Industrial Co., Ltd. Electroacoustic transducer of digital type
EP0936837A3 (en) * 1998-02-16 1999-09-15 Matsushita Electric Industrial Co., Ltd. Electroacoustic transducer of digital type
US6125189A (en) * 1998-02-16 2000-09-26 Matsushita Electric Industrial Co., Ltd. Electroacoustic transducer of digital type
US6449370B1 (en) 1998-02-16 2002-09-10 Matsushita Electric Industrial Co., Ltd. Digital electro-acoustic transducer

Also Published As

Publication number Publication date
JPS606594B2 (en) 1985-02-19

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