JPS5582516A - Amplitude modulator - Google Patents

Amplitude modulator

Info

Publication number
JPS5582516A
JPS5582516A JP15708178A JP15708178A JPS5582516A JP S5582516 A JPS5582516 A JP S5582516A JP 15708178 A JP15708178 A JP 15708178A JP 15708178 A JP15708178 A JP 15708178A JP S5582516 A JPS5582516 A JP S5582516A
Authority
JP
Japan
Prior art keywords
signal
output
pulse width
opposite phase
demodulator
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
JP15708178A
Other languages
Japanese (ja)
Other versions
JPS6156890B2 (en
Inventor
Hiroshi Ono
Kiyomi Kawamura
Seiji Isobe
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15708178A priority Critical patent/JPS5582516A/en
Publication of JPS5582516A publication Critical patent/JPS5582516A/en
Publication of JPS6156890B2 publication Critical patent/JPS6156890B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplitude Modulation (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To compensate the wave distortion produced when the pulse width is narrow, by taking the phase of audible frequency signal as opposite phase and feeding this signal to the demodulated output signal with B or C class amplification. CONSTITUTION:The pulse width modulation is made for the audible frequency signal inputted at the pulse width modulator 10 and this signal is amplified at the transistor Tr11. The amplified signal is demodulated at the demodulator a. On the other hand, the audio frequency signal is fed to the coupling inverter 20 to constitute the phase into opposite phase and this opposite phase signal is fed to the amplifier 21, which is an amplifier of class B or C and amplifies almost positive half wave of the opposite phase output signal and picks up the peak. This peak is fed to the output signal of the demodulator a. With this constitution, if the pulse width of the output of Tr11 is narrow, although the low level part of demodulated output signal is distorted, the wave distortion can be compensated by adding the output of the amplifier 21 to the peak level of the output of the demodulator a.
JP15708178A 1978-12-19 1978-12-19 Amplitude modulator Granted JPS5582516A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15708178A JPS5582516A (en) 1978-12-19 1978-12-19 Amplitude modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15708178A JPS5582516A (en) 1978-12-19 1978-12-19 Amplitude modulator

Publications (2)

Publication Number Publication Date
JPS5582516A true JPS5582516A (en) 1980-06-21
JPS6156890B2 JPS6156890B2 (en) 1986-12-04

Family

ID=15641824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15708178A Granted JPS5582516A (en) 1978-12-19 1978-12-19 Amplitude modulator

Country Status (1)

Country Link
JP (1) JPS5582516A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5984909U (en) * 1982-11-30 1984-06-08 株式会社東芝 amplitude modulator
WO1998037628A1 (en) * 1997-02-21 1998-08-27 Claudio Lastrucci A reconstruction filter for eliminating the switching residue in a switched system or similar

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5984909U (en) * 1982-11-30 1984-06-08 株式会社東芝 amplitude modulator
JPH0136337Y2 (en) * 1982-11-30 1989-11-06
WO1998037628A1 (en) * 1997-02-21 1998-08-27 Claudio Lastrucci A reconstruction filter for eliminating the switching residue in a switched system or similar
US6281767B1 (en) 1997-02-21 2001-08-28 Claudio Lastrucci Reconstruction filter for eliminating the switching residue in a switched system

Also Published As

Publication number Publication date
JPS6156890B2 (en) 1986-12-04

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