JPS572149A - Digitizing orthogonal modulator - Google Patents

Digitizing orthogonal modulator

Info

Publication number
JPS572149A
JPS572149A JP7573380A JP7573380A JPS572149A JP S572149 A JPS572149 A JP S572149A JP 7573380 A JP7573380 A JP 7573380A JP 7573380 A JP7573380 A JP 7573380A JP S572149 A JPS572149 A JP S572149A
Authority
JP
Japan
Prior art keywords
signal
circuits
output
base
signals
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
JP7573380A
Other languages
Japanese (ja)
Inventor
Hiroshi Suzuki
Yasushi Yamao
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7573380A priority Critical patent/JPS572149A/en
Publication of JPS572149A publication Critical patent/JPS572149A/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 realize an easy formation of a modulator into an IC, by producing a base signal of in-phase component of a modulated wave and a base signal having a complementary relation with the first base signal and selecting these base signals alternately with a switch signal that is driven by a carrier signal to obtain a balanced modulation output. CONSTITUTION:The phase value is calculated based on an input signal supplied from an input terminal 1, and the phase value is generated through a phase control circuit 2 to be applied to complementary signal generating circuits 12 and 13 to the sine and cosine signals as well as to sine and cosine signal generating circuits 3 and 4. A base signal of in-phase component of a modulated wave is generated from the circuits 3 and 4, and the signal having a complementary relation with the base signal is generated through the circuits 12 and 13 by a digital process. The output signal of each of circuits 3, 4, 12 and 13 is applied to switch circuits 14 and 15 using an MOS analog switch, etc. and these output signals are switched alternately by the output of a frequency stabilizing circuit 5 having a frequency fo. The signals switched through circuits 14 and 15 are synthesized by a synthesizing circuit 9, and a balanced modulation output is produced through an output terminal 10 of a digital orthogonal modulator.
JP7573380A 1980-06-04 1980-06-04 Digitizing orthogonal modulator Pending JPS572149A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7573380A JPS572149A (en) 1980-06-04 1980-06-04 Digitizing orthogonal modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7573380A JPS572149A (en) 1980-06-04 1980-06-04 Digitizing orthogonal modulator

Publications (1)

Publication Number Publication Date
JPS572149A true JPS572149A (en) 1982-01-07

Family

ID=13584761

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7573380A Pending JPS572149A (en) 1980-06-04 1980-06-04 Digitizing orthogonal modulator

Country Status (1)

Country Link
JP (1) JPS572149A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53129950A (en) * 1977-04-19 1978-11-13 Matsushita Electric Ind Co Ltd Signal processor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53129950A (en) * 1977-04-19 1978-11-13 Matsushita Electric Ind Co Ltd Signal processor

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