JPS5936623U - digitally controlled attenuator - Google Patents

digitally controlled attenuator

Info

Publication number
JPS5936623U
JPS5936623U JP13090882U JP13090882U JPS5936623U JP S5936623 U JPS5936623 U JP S5936623U JP 13090882 U JP13090882 U JP 13090882U JP 13090882 U JP13090882 U JP 13090882U JP S5936623 U JPS5936623 U JP S5936623U
Authority
JP
Japan
Prior art keywords
attenuator
pass filter
output
low
digitally controlled
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
JP13090882U
Other languages
Japanese (ja)
Other versions
JPS6345056Y2 (en
Inventor
中谷　奉文
石黒　則夫
Original Assignee
日本コロムビア株式会社
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 日本コロムビア株式会社 filed Critical 日本コロムビア株式会社
Priority to JP13090882U priority Critical patent/JPS5936623U/en
Publication of JPS5936623U publication Critical patent/JPS5936623U/en
Application granted granted Critical
Publication of JPS6345056Y2 publication Critical patent/JPS6345056Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Analogue/Digital Conversion (AREA)
  • Networks Using Active Elements (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来例を示す回路図、第２図はその各部波形図
、第３図は本考案の一実施例を示す回路図、第４図はそ
の各部波形図である。 図中、２は乗算型ＤＡ変換器、４′は減衰量指　　　　
′足回路、１３は低域通過フィルタ、１６及び１７は乗
算器である。FIG. 1 is a circuit diagram showing a conventional example, FIG. 2 is a waveform diagram of each part thereof, FIG. 3 is a circuit diagram showing an embodiment of the present invention, and FIG. 4 is a waveform diagram of each part thereof. In the figure, 2 is a multiplication type DA converter, and 4' is an attenuation amount indicator.
13 is a low-pass filter, and 16 and 17 are multipliers.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] デジタル制御信号により、乗算型ＤＡコンバータと演算
増幅器とおらなる減衰器の減衰量を制御する減衰器にお
いて、上記減衰器の出力端子にグリッジノイズを含む帯
域や除去するための低域通過フィルターを接続すると共
に、上記減衰器の出力か上記低域通過フィルターのかを
選択する選択手段を設け、上記ディジタル制御信号の変
更前より、上記グリッジノイズの発生する期間は上記選
択手段を制御して上記低域通過フィルタの出力を選択す
る様にしたことを特徴とするディジタル制御減衰器。In an attenuator that controls the amount of attenuation of an attenuator consisting of a multiplier DA converter and an operational amplifier using a digital control signal, a low-pass filter is connected to the output terminal of the attenuator to remove the band that includes glitch noise. At the same time, selection means is provided for selecting between the output of the attenuator and the low-pass filter, and the selection means is controlled to select between the output of the attenuator and the low-pass filter during the period in which the glitch noise occurs before the digital control signal is changed. A digitally controlled attenuator characterized in that the output of a pass filter is selected.
JP13090882U 1982-08-30 1982-08-30 digitally controlled attenuator Granted JPS5936623U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13090882U JPS5936623U (en) 1982-08-30 1982-08-30 digitally controlled attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13090882U JPS5936623U (en) 1982-08-30 1982-08-30 digitally controlled attenuator

Publications (2)

Publication Number Publication Date
JPS5936623U true JPS5936623U (en) 1984-03-07
JPS6345056Y2 JPS6345056Y2 (en) 1988-11-22

Family

ID=30296133

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13090882U Granted JPS5936623U (en) 1982-08-30 1982-08-30 digitally controlled attenuator

Country Status (1)

Country Link
JP (1) JPS5936623U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6298816A (en) * 1985-10-24 1987-05-08 Matsushita Electric Ind Co Ltd Attenuation device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6298816A (en) * 1985-10-24 1987-05-08 Matsushita Electric Ind Co Ltd Attenuation device

Also Published As

Publication number Publication date
JPS6345056Y2 (en) 1988-11-22

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