JPS57152741A - System for regeneration of pcm signal - Google Patents

System for regeneration of pcm signal

Info

Publication number
JPS57152741A
JPS57152741A JP3904781A JP3904781A JPS57152741A JP S57152741 A JPS57152741 A JP S57152741A JP 3904781 A JP3904781 A JP 3904781A JP 3904781 A JP3904781 A JP 3904781A JP S57152741 A JPS57152741 A JP S57152741A
Authority
JP
Japan
Prior art keywords
signal
converted
pcm signal
voltage
analogue
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.)
Pending
Application number
JP3904781A
Other languages
Japanese (ja)
Inventor
Tsutomu Takigawa
Kiyoshi Ito
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.)
Onkyo Corp
Original Assignee
Onkyo Corp
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 Onkyo Corp filed Critical Onkyo Corp
Priority to JP3904781A priority Critical patent/JPS57152741A/en
Publication of JPS57152741A publication Critical patent/JPS57152741A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

PURPOSE:To improve the efficiency of power supply, by setting the power source voltage of a power amplifying part in a PCM signal regenerating device to a voltage having a magnitude proportional to that of a PCM signal. CONSTITUTION:A PCM signal is converted to an analogue audio signal by a D/A converter 3 after being delayed in a delay circuit 2 by a time gamma. This audio signal is amplified by a power amplifying part 4 and is applied to a speaker 5. The PCM signal has the number of bits converted to 1/2 by a code converter and is converted to an analogue signal by a D/A converter 7. This analogue signal is converted to a pulse width modulation wave by a pulse width modulating circuit 8 and is applied to a frequency dividing circuit 13 through an isolation 12. The output of the frequency dividing circuit 13 is applied to a push pull inverter circuit 14, and the output is rectified to generate a DC voltage proportional to the amplitude of the analogue signal. This DC voltage is applied to the power supply terminal of the power amplifying part 4.
JP3904781A 1981-03-17 1981-03-17 System for regeneration of pcm signal Pending JPS57152741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3904781A JPS57152741A (en) 1981-03-17 1981-03-17 System for regeneration of pcm signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3904781A JPS57152741A (en) 1981-03-17 1981-03-17 System for regeneration of pcm signal

Publications (1)

Publication Number Publication Date
JPS57152741A true JPS57152741A (en) 1982-09-21

Family

ID=12542209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3904781A Pending JPS57152741A (en) 1981-03-17 1981-03-17 System for regeneration of pcm signal

Country Status (1)

Country Link
JP (1) JPS57152741A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5892111A (en) * 1981-11-27 1983-06-01 Hitachi Ltd Power amplifier
JPS62286302A (en) * 1986-06-05 1987-12-12 Matsushita Electric Ind Co Ltd Highly efficient power amplifier

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5715509A (en) * 1980-07-03 1982-01-26 Victor Co Of Japan Ltd Power supply circuit for power amplifier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5715509A (en) * 1980-07-03 1982-01-26 Victor Co Of Japan Ltd Power supply circuit for power amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5892111A (en) * 1981-11-27 1983-06-01 Hitachi Ltd Power amplifier
JPH0223048B2 (en) * 1981-11-27 1990-05-22 Hitachi Ltd
JPS62286302A (en) * 1986-06-05 1987-12-12 Matsushita Electric Ind Co Ltd Highly efficient power amplifier

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