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JPS55625A - Amplitude modulator - Google Patents

Amplitude modulator

Info

Publication number
JPS55625A
JPS55625A JP7221978A JP7221978A JPS55625A JP S55625 A JPS55625 A JP S55625A JP 7221978 A JP7221978 A JP 7221978A JP 7221978 A JP7221978 A JP 7221978A JP S55625 A JPS55625 A JP S55625A
Authority
JP
Japan
Prior art keywords
circuit
base band
band signal
terminal
binary base
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
JP7221978A
Other languages
Japanese (ja)
Inventor
Isamu Kurosaki
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7221978A priority Critical patent/JPS55625A/en
Publication of JPS55625A publication Critical patent/JPS55625A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/04—Modulator circuits; Transmitter circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To obtain the ON-OFF AM signal which features a high fidelity to the binary base band signal by controlling both the oscillation and its stop of the integrating astable multivibrator containing the differential amplifier circuit. CONSTITUTION:With application of the positive voltage to input terminal T1, astable multivibrator type oscillation circuit 4 starts oscillations. And circuit 4 stops oscillations with application of the negtive voltage to terminal T1. Circuit 6 functions as the buffer amplifier and the low-pass filter. Accordingly, circuit 6 functions as the ON-OFF AM modulator by the binary base band signal applied to terminal T1 with no DC component of the binary base band signal contained. As a result, a high-fidelity ON-OFF AM signals can be obtained.
JP7221978A 1978-06-16 1978-06-16 Amplitude modulator Pending JPS55625A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7221978A JPS55625A (en) 1978-06-16 1978-06-16 Amplitude modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7221978A JPS55625A (en) 1978-06-16 1978-06-16 Amplitude modulator

Publications (1)

Publication Number Publication Date
JPS55625A true JPS55625A (en) 1980-01-07

Family

ID=13482907

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7221978A Pending JPS55625A (en) 1978-06-16 1978-06-16 Amplitude modulator

Country Status (1)

Country Link
JP (1) JPS55625A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5812461A (en) * 1981-07-15 1983-01-24 Takei Kiki Kogyo Kk Radio transmission system for information pulse
JPS6010822A (en) * 1983-06-29 1985-01-21 Matsushita Electric Ind Co Ltd Transmitter-receiver
JPH03219732A (en) * 1989-11-06 1991-09-27 Sanyo Electric Co Ltd Communication system
JPH03273724A (en) * 1989-05-08 1991-12-04 Sanyo Electric Co Ltd Spread spectrum communication system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5812461A (en) * 1981-07-15 1983-01-24 Takei Kiki Kogyo Kk Radio transmission system for information pulse
JPS6010822A (en) * 1983-06-29 1985-01-21 Matsushita Electric Ind Co Ltd Transmitter-receiver
JPH03273724A (en) * 1989-05-08 1991-12-04 Sanyo Electric Co Ltd Spread spectrum communication system
JPH03219732A (en) * 1989-11-06 1991-09-27 Sanyo Electric Co Ltd Communication system

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