JPH0214606A - Variable attenuator - Google Patents
Variable attenuatorInfo
- Publication number
- JPH0214606A JPH0214606A JP63164543A JP16454388A JPH0214606A JP H0214606 A JPH0214606 A JP H0214606A JP 63164543 A JP63164543 A JP 63164543A JP 16454388 A JP16454388 A JP 16454388A JP H0214606 A JPH0214606 A JP H0214606A
- Authority
- JP
- Japan
- Prior art keywords
- attenuation
- data
- attenuator
- temperature
- input
- 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
Links
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は外部からの制御情報に従って減衰量を可変す
ることができる可変減衰器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a variable attenuator that can vary the amount of attenuation in accordance with external control information.
第３図は従来の可変減衰器の構成図であり、１は設定減
衰量データの入力端子、９は減衰量の入力値に応じて減
衰器５の減衰量を変化させるのに必要な制御電圧（又は
電流）を得るための制御データを発生する演算器、４は
演算器９からの制御データを電圧（又は電流）に変換す
るＤ／Ａ変換器、５はＤ／Ａ変換器４からの電圧（又は
電流）によりその減衰量を変えられる可変減衰器（例え
ばビンダイオード）、６は可変減衰器５への信号入力、
７は可変減衰器５の信号出力である。FIG. 3 is a configuration diagram of a conventional variable attenuator, where 1 is an input terminal for setting attenuation data, and 9 is a control voltage required to change the attenuation of the attenuator 5 according to the input value of the attenuation. (or current); 4 is a D/A converter that converts the control data from the calculator 9 into voltage (or current); a variable attenuator (for example, a bin diode) whose attenuation can be changed by voltage (or current); 6 is a signal input to the variable attenuator 5;
7 is a signal output of the variable attenuator 5.
次に動作について説明する。入力電圧（又は電流）で減
衰量の変化する素子（例えばピンダイオード）により構
成された可変減衰器５では、その入力電圧（又は電流）
に対する減衰量は一般的には第４図に示すようにある一
定の温度条件のもと（例えば第４図の■）においても非
直線性を持つ。Next, the operation will be explained. In the variable attenuator 5, which is composed of an element whose attenuation changes depending on the input voltage (or current) (for example, a pin diode), the input voltage (or current)
As shown in FIG. 4, the amount of attenuation for the curve generally has non-linearity even under certain temperature conditions (for example, ■ in FIG. 4).
入力端子１より入力される減衰量データは第４図に示す
ある一定温度（例えば■）における非直線性の逆特性を
持つ演算器９に入力され、変換される。この変換データ
はＤ／Ａ変換器４において電圧〈又は電流）に再度変換
される。この電圧（又は電流）により減衰器５の減衰量
が変化せられる。The attenuation data inputted from the input terminal 1 is inputted to an arithmetic unit 9 having an inverse characteristic of nonlinearity at a certain constant temperature (for example, ■) shown in FIG. 4, and is converted. This conversion data is again converted into voltage (or current) in the D/A converter 4. The amount of attenuation of the attenuator 5 is changed by this voltage (or current).
この演算器９による演算により、入力端子１より入力さ
れた減衰量データと、減衰器５の減衰量実測値とは第５
図に示すようにある一定温度■においては等しくされる
こととなる。Through the calculation by the calculator 9, the attenuation data input from the input terminal 1 and the actual attenuation value of the attenuator 5 are determined by the fifth
As shown in the figure, at a certain constant temperature (3), they are equalized.
従来の可変減衰器は以上のように構成されているので、
第４図に示すように減衰器５の入出力特性が温度により
変化すると、第５図に示すように入力端子１への入力減
衰量データと減衰器５の減衰量が等しくならないという
問題点があった。Since the conventional variable attenuator is configured as above,
When the input/output characteristics of the attenuator 5 change depending on the temperature as shown in FIG. 4, a problem arises in that the input attenuation data to the input terminal 1 and the attenuation of the attenuator 5 are not equal as shown in FIG. there were.
この発明は上記のような問題点を解消するためになされ
たもので、周囲温度が変化しても常に減衰量の入力デー
タと減衰器の減衰量とが等しくなるような可変減衰器を
得ることを目的としている。This invention was made in order to solve the above-mentioned problems.It is an object of the present invention to obtain a variable attenuator in which the attenuation amount input data and the attenuation amount of the attenuator are always equal even if the ambient temperature changes. It is an object.
この発明に係る可変減衰器は周囲温度を検出する手段と
、周囲温度検出データと減衰量入力データとから減衰器
に設定すべき電圧（又は電流）データを演算する演算器
とを備えたものである。The variable attenuator according to the present invention includes means for detecting ambient temperature and a computing unit for computing voltage (or current) data to be set in the attenuator from ambient temperature detection data and attenuation amount input data. be.
この発明においては、演算器は温度センサからの周囲の
温度データに応じ制御データを変化させ、入力される減
衰量データが一定の場合、減衰器の減衰量を温度の変化
にかかわらず一定にする。In this invention, the arithmetic unit changes the control data according to the ambient temperature data from the temperature sensor, and when the input attenuation amount data is constant, the attenuation amount of the attenuator is kept constant regardless of temperature changes. .
以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図において、１は設定減衰量データの入力端子、２
は温度センサ、３は入力端子１からの減衰量データと温
度センサ２からの温度データに応じて減衰器５の減衰量
を変化させるための制御Ｂデータを発生する演算器、４
は演算器３の制御データを電圧又は電流に変換するＤ／
Ａ変換器、５はＤ／Ａ変換器４からの電圧（又は電流）
に応じてその減衰量を変えられる可変減衰器、６及び７
はそれぞれ可変減衰器５の信号入力、信号出力である。In Fig. 1, 1 is an input terminal for setting attenuation amount data, 2
3 is a temperature sensor; 3 is an arithmetic unit that generates control B data for changing the attenuation amount of the attenuator 5 according to the attenuation amount data from the input terminal 1 and the temperature data from the temperature sensor 2; 4;
is a D/ that converts the control data of the arithmetic unit 3 into voltage or current.
A converter, 5 is the voltage (or current) from the D/A converter 4
Variable attenuators 6 and 7 whose attenuation amount can be changed according to
are the signal input and signal output of the variable attenuator 5, respectively.
次に動作について説明する。減衰器５は第４図に示すよ
うに入力電圧（又は電流）対減衰量の特性が温度により
変化する。演算器３は入力端子１より入力される減衰量
データと温度センサ２から入力される温度データから、
第４図に示す各温度における減衰器の入出力特性の逆特
性を持つ制御データを出力する。この出力データはＤ／
Ａ変換器４により電圧（又は電流）に変換され、減衰器
５の減衰量を可変ず−る。Next, the operation will be explained. As shown in FIG. 4, the attenuator 5 has a characteristic of input voltage (or current) versus attenuation that changes depending on the temperature. The calculator 3 calculates the attenuation data input from the input terminal 1 and the temperature data input from the temperature sensor 2.
Control data having characteristics opposite to the input/output characteristics of the attenuator at each temperature shown in FIG. 4 is output. This output data is D/
It is converted into a voltage (or current) by the A converter 4, and the amount of attenuation of the attenuator 5 is varied.
なお、上記実施例では減衰量入力が数値データであるも
のとしたが、第２図の本発明の第２の実施例に示すよう
に入力端子１にＡ／Ｄ変換器８を接続し減衰量をアナロ
グ量にて入力するものとしても良い。In the above embodiment, the attenuation amount input is numerical data, but as shown in the second embodiment of the present invention shown in FIG. may be input as an analog quantity.
以上のようにこの発明によれば、温度センサからの温度
データに応じ、温度特性を持つ減衰器の制御データを可
変するようにしたので、設定した減衰量の温度による変
化の少ない可変減衰器が得られる効果がある。As described above, according to the present invention, the control data of the attenuator having temperature characteristics is varied according to the temperature data from the temperature sensor, so that the variable attenuator whose set attenuation amount changes little with temperature There are benefits to be gained.
第１図はこの発明の一実施例による可変減衰器の構成図
、第２図はこの発明の他の実施例の構成図、第３図は従
来の可変減衰器の構成図、第４図は減衰器の入力電圧（
又は電流）対減衰量特性を示す図、第５図は可変減衰器
全体の入力減衰量設定値対減衰量実測値の特性を示す図
である。
１は設定減衰量入力端子、２は温度センサ、３は演算器
、４はＤ／Ａ変換器、５は可変減衰器、６及び７は可変
減衰器の入力端子、出力端子、８はＡ／Ｄ変換器、９は
演算器である。
なお図中同一符号は同−又は相当部分を示す。Fig. 1 is a block diagram of a variable attenuator according to an embodiment of the present invention, Fig. 2 is a block diagram of another embodiment of the present invention, Fig. 3 is a block diagram of a conventional variable attenuator, and Fig. 4 is a block diagram of a variable attenuator according to an embodiment of the present invention. Attenuator input voltage (
FIG. 5 is a diagram showing the characteristics of the input attenuation setting value versus the measured attenuation value of the entire variable attenuator. 1 is a set attenuation amount input terminal, 2 is a temperature sensor, 3 is a computing unit, 4 is a D/A converter, 5 is a variable attenuator, 6 and 7 are input terminals and output terminals of the variable attenuator, and 8 is an A/A converter. The D converter 9 is an arithmetic unit. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
出力される温度データとを入力とする演算器と、 該演算器出力をアナログ電圧又は電流に変換するＤ／Ａ
変換器と、 入力される電圧又は電流によりその減衰量が変化する減
衰器とを備えたことを特徴とする可変減衰器。(1) A computing unit that receives the attenuation input from the input terminal and temperature data output from the temperature sensor, and a D/A that converts the output of the computing unit into an analog voltage or current.
A variable attenuator comprising: a converter; and an attenuator whose attenuation amount changes depending on an input voltage or current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63164543A JPH0214606A (en) | 1988-06-30 | 1988-06-30 | Variable attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63164543A JPH0214606A (en) | 1988-06-30 | 1988-06-30 | Variable attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0214606A true JPH0214606A (en) | 1990-01-18 |
Family
ID=15795156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63164543A Pending JPH0214606A (en) | 1988-06-30 | 1988-06-30 | Variable attenuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0214606A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH044196U (en) * | 1990-04-25 | 1992-01-14 | ||
| KR100728756B1 (en) * | 2004-10-14 | 2007-06-19 | 주식회사 이너트론 | Digital attenuator capable of precise control by temperature compensation and its control method |
-
1988
- 1988-06-30 JP JP63164543A patent/JPH0214606A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH044196U (en) * | 1990-04-25 | 1992-01-14 | ||
| KR100728756B1 (en) * | 2004-10-14 | 2007-06-19 | 주식회사 이너트론 | Digital attenuator capable of precise control by temperature compensation and its control method |
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