JPS55653A - Receiving device incorporating pulse duration modulating amplifier - Google Patents

Receiving device incorporating pulse duration modulating amplifier

Info

Publication number
JPS55653A
JPS55653A JP7351078A JP7351078A JPS55653A JP S55653 A JPS55653 A JP S55653A JP 7351078 A JP7351078 A JP 7351078A JP 7351078 A JP7351078 A JP 7351078A JP S55653 A JPS55653 A JP S55653A
Authority
JP
Japan
Prior art keywords
carrier
pwm
pulse duration
frequency
beat
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
JP7351078A
Other languages
Japanese (ja)
Other versions
JPS6040742B2 (en
Inventor
Toshio Komori
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.)
Marantz Japan Inc
Original Assignee
Marantz Japan Inc
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 Marantz Japan Inc filed Critical Marantz Japan Inc
Priority to JP53073510A priority Critical patent/JPS6040742B2/en
Publication of JPS55653A publication Critical patent/JPS55653A/en
Publication of JPS6040742B2 publication Critical patent/JPS6040742B2/en
Expired 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
    • H04B14/026—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse time characteristics modulation, e.g. width, position, interval

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)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

PURPOSE:To eliminate the beat at the broadcast receiving time by controlling the carrier frequency of the pulse duration modulating amplifier via the oscillation frequency of the carrier oscillator capable of the frequency selection with the external change-over switch and then offsetting the carrier frequency. CONSTITUTION:The signal sent from tuner part 1 is applied to pulse duration modulating amplifier PWM-AMP20, and the oscillation frequency is changed over 4 to carrier oscillator 3 at PWM modulation part 2. Output step 5 of the PWM-AMP is connected to speaker 7 via low-pass filter 6. In case the beat is caused between the carrier higher harmonic wave of PWM-AMP20 and a certain reception signal at the receiving time, carrier frequency change-over switch 4 is operated manually to give a slight change to the carrier frequency. Thus, the occurrence of the beat can be prevented.
JP53073510A 1978-06-16 1978-06-16 Receiving device with pulse width modulation amplifier Expired JPS6040742B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53073510A JPS6040742B2 (en) 1978-06-16 1978-06-16 Receiving device with pulse width modulation amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53073510A JPS6040742B2 (en) 1978-06-16 1978-06-16 Receiving device with pulse width modulation amplifier

Publications (2)

Publication Number Publication Date
JPS55653A true JPS55653A (en) 1980-01-07
JPS6040742B2 JPS6040742B2 (en) 1985-09-12

Family

ID=13520311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53073510A Expired JPS6040742B2 (en) 1978-06-16 1978-06-16 Receiving device with pulse width modulation amplifier

Country Status (1)

Country Link
JP (1) JPS6040742B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6026693U (en) * 1983-07-29 1985-02-22 シャープ株式会社 Beat interference reduction circuit for tape recorder with radio receiver
JPH05315980A (en) * 1992-05-08 1993-11-26 Victor Co Of Japan Ltd Radio receiver
CN115483944A (en) * 2022-09-01 2022-12-16 浙江吉利控股集团有限公司 PWM control method, device, vehicle and storage medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944100U (en) * 1972-07-19 1974-04-18
JPS5326605A (en) * 1976-08-25 1978-03-11 Sony Corp Radio receiver containing pulse duration mod ulation amplifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944100U (en) * 1972-07-19 1974-04-18
JPS5326605A (en) * 1976-08-25 1978-03-11 Sony Corp Radio receiver containing pulse duration mod ulation amplifier

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6026693U (en) * 1983-07-29 1985-02-22 シャープ株式会社 Beat interference reduction circuit for tape recorder with radio receiver
JPH0316081Y2 (en) * 1983-07-29 1991-04-08
JPH05315980A (en) * 1992-05-08 1993-11-26 Victor Co Of Japan Ltd Radio receiver
CN115483944A (en) * 2022-09-01 2022-12-16 浙江吉利控股集团有限公司 PWM control method, device, vehicle and storage medium
CN115483944B (en) * 2022-09-01 2023-12-05 浙江吉利控股集团有限公司 PWM control method and device, vehicle and storage medium

Also Published As

Publication number Publication date
JPS6040742B2 (en) 1985-09-12

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