JPS55133162A - Modulation unit - Google Patents

Modulation unit

Info

Publication number
JPS55133162A
JPS55133162A JP4056979A JP4056979A JPS55133162A JP S55133162 A JPS55133162 A JP S55133162A JP 4056979 A JP4056979 A JP 4056979A JP 4056979 A JP4056979 A JP 4056979A JP S55133162 A JPS55133162 A JP S55133162A
Authority
JP
Japan
Prior art keywords
signal
carrier
leakage
low level
diode
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
JP4056979A
Other languages
Japanese (ja)
Inventor
Shigeru Minagawa
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 JP4056979A priority Critical patent/JPS55133162A/en
Publication of JPS55133162A publication Critical patent/JPS55133162A/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 enable to reproduce the logic signal delivered without error even with envelope detection, by decreasing the leakage signal level of carrier when the logic signal is at low level. CONSTITUTION:When the unidirectional Return Zero (RZ) signal of the modulation signal is at low level, that is, when the terminal 16 is selected to the terminal 15 of the selector switch, the operation of the amplifier 2 is interrupted with the inversion of the switch 3. In this case, the diode 5 is nonconductive and the diode 9 is conductive, bypassing the leakage signal of carrier to ground with the bypass capacitor 7. With bypass of the carrier leakage signal to ground, the leakage of carrier at the low level of unidirectional flow RZ signal can be suppressed.
JP4056979A 1979-04-04 1979-04-04 Modulation unit Pending JPS55133162A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4056979A JPS55133162A (en) 1979-04-04 1979-04-04 Modulation unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4056979A JPS55133162A (en) 1979-04-04 1979-04-04 Modulation unit

Publications (1)

Publication Number Publication Date
JPS55133162A true JPS55133162A (en) 1980-10-16

Family

ID=12584097

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4056979A Pending JPS55133162A (en) 1979-04-04 1979-04-04 Modulation unit

Country Status (1)

Country Link
JP (1) JPS55133162A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58219843A (en) * 1982-06-14 1983-12-21 Nec Corp Signal transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58219843A (en) * 1982-06-14 1983-12-21 Nec Corp Signal transmitter

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