JPH0314853U - - Google Patents

Info

Publication number
JPH0314853U
JPH0314853U JP7485389U JP7485389U JPH0314853U JP H0314853 U JPH0314853 U JP H0314853U JP 7485389 U JP7485389 U JP 7485389U JP 7485389 U JP7485389 U JP 7485389U JP H0314853 U JPH0314853 U JP H0314853U
Authority
JP
Japan
Prior art keywords
balanced modulators
modulation
output
applying
circuit
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
JP7485389U
Other languages
English (en)
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 filed Critical
Priority to JP7485389U priority Critical patent/JPH0314853U/ja
Publication of JPH0314853U publication Critical patent/JPH0314853U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Description

【図面の簡単な説明】
第１図は本考案の直交変調回路の構成図、第２
図は従来の波形発生回路図、第３図は本考案の主
要部である波形発生回路のブロツク図、第４図は
本考案の要部波形のタイムチヤートである。 １，３……波形発生回路、２，４……平衡変調
器、５……合成器、６……正弦波発振器、７……
分配器、８……９０°移相器、９，１３……ＲＯ
Ｍ、１０，１４……Ｄ／Ａ変換器、１１，１５…
…増幅器、１２，１６……コンデンサ、１７……
トランジスタ、１９……バイアス電圧。

Claims (1)

  1. 【実用新案登録請求の範囲】 ２つの平衡変調器に互いに９０°位相の異なる
    直交した搬送波を入力し、該搬送波を変調するた
    めのデジタル変調データをアナログ波形に変換し
    て前記２つの平衡変調器にそれぞれ入力する２つ
    の波形発生回路を備え、前記２つの平衡変調器の
    出力を合成して変調出力を得る直交変調回路にお
    いて、 前記２つの波形発生回路のそれぞれの出力端に
    前記２つの平衡変調器の変調素子が動作状態にな
    るようなバイアス電圧を印加するためのスイツチ
    回路を備え、通常の変調動作時はＯＦＦの状態と
    なつている該スイツチ回路をＯＮ状態にするとと
    もに前記アナログ波形が一定直流電圧となるよう
    な制御信号を与えて前記直交変調回路の出力とし
    て無変調の搬送波出力が得られるように構成され
    たことを特徴とする直交変調回路。
JP7485389U 1989-06-28 1989-06-28 Pending JPH0314853U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7485389U JPH0314853U (ja) 1989-06-28 1989-06-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7485389U JPH0314853U (ja) 1989-06-28 1989-06-28

Publications (1)

Publication Number Publication Date
JPH0314853U true JPH0314853U (ja) 1991-02-14

Family

ID=31614912

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7485389U Pending JPH0314853U (ja) 1989-06-28 1989-06-28

Country Status (1)

Country Link
JP (1) JPH0314853U (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597766A (en) * 1979-01-22 1980-07-25 Toshiba Corp Carrier suppressing/balancing phase modulation system
JPS5729100A (en) * 1980-06-20 1982-02-16 Crypto Ag Method of modifying voice signal divided into signal segments for encoding transmission and device for executing same method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597766A (en) * 1979-01-22 1980-07-25 Toshiba Corp Carrier suppressing/balancing phase modulation system
JPS5729100A (en) * 1980-06-20 1982-02-16 Crypto Ag Method of modifying voice signal divided into signal segments for encoding transmission and device for executing same method

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