JPH0430611A - Temperature characteristic correction circuit - Google Patents

Temperature characteristic correction circuit

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Publication number
JPH0430611A
JPH0430611A JP2134544A JP13454490A JPH0430611A JP H0430611 A JPH0430611 A JP H0430611A JP 2134544 A JP2134544 A JP 2134544A JP 13454490 A JP13454490 A JP 13454490A JP H0430611 A JPH0430611 A JP H0430611A
Authority
JP
Japan
Prior art keywords
temperature
output level
vca
control voltage
voltage
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
JP2134544A
Other languages
Japanese (ja)
Inventor
Noriaki Kondou
近藤 紀陽
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP2134544A priority Critical patent/JPH0430611A/en
Publication of JPH0430611A publication Critical patent/JPH0430611A/en
Pending legal-status Critical Current

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  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To easily correct a temperature characteristic with simple circuit constitution by allowing a control voltage provision means to vary a control voltage applied to a voltage controlled amplifier (VCA) corresponding to the detection output of a temperature detection means. CONSTITUTION:A temperature sensor (temperature detection means) 7 detects the ambient temperature of a VCA 3 momentarily and its detected output signal is stored sequentially in a RAM or the like provided to a microcomputer (control voltage provision means) 5a. For example, a data (representing temperature - output level curve) having a linear function between a temperature change and an output level change of the VCA 3 and a data (representing voltage - output level curve) having a linear function between a control voltage (VC) and an output level change of the VCA 3 are stored in the microcomputer from the data input section 9. When the output level is decreased in proportional to a temperature increases, the control voltage (VC) is increased to increase the output level.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、温度変化に伴って出力レベルが変動する電圧
制御増幅器(VCA)の制御に好適な温度特性補正回路
に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a temperature characteristic correction circuit suitable for controlling a voltage controlled amplifier (VCA) whose output level fluctuates with temperature changes.

〔発明の概要] 本発明は、温度変化に伴って出力レベルが変動するVC
Aの制御に好適な温度特性補正回路に関し、変動したV
CAの出力レベルを所望の値に制御する制御電圧の値が
温度検出手段の検出出力に対応して変化される構成によ
り、VCAの温度特性が、電子ボリューム(EVR)に
より補正できるとともに、回路構成が簡素化できるよう
にしたものである。
[Summary of the Invention] The present invention provides a VC whose output level fluctuates with temperature changes.
Regarding the temperature characteristic correction circuit suitable for controlling A, the fluctuated V
With the configuration in which the value of the control voltage that controls the output level of the CA to a desired value is changed in accordance with the detection output of the temperature detection means, the temperature characteristics of the VCA can be corrected by the electronic volume control (EVR), and the circuit configuration It is designed so that it can be simplified.

〔従来の技術] 一般に、VCAは周囲の環境温度変化(自身の発熱によ
る温度変化も含む)に伴って、その出力レベルが変動す
る。
[Prior Art] Generally, the output level of a VCA fluctuates with changes in the surrounding environmental temperature (including temperature changes due to its own heat generation).

そこで、第4図から理解されるように、端子(30)か
ら入力された直流の電圧(VO )が抵抗(R)、ダイ
オード(D)を介してV C A (3)に印加され、
その印加電圧(■,)が電圧(■。)が変化されるのに
伴ってV C A (3)の出力レベルを制m(補正)
し、入力端子(10)から入力された信号が、所望のレ
ベルで出力端子(20)から出力される。
Therefore, as understood from FIG. 4, the DC voltage (VO) input from the terminal (30) is applied to VCA (3) via the resistor (R) and diode (D),
The applied voltage (■,) controls the output level of VCA (3) as the voltage (■.) changes (correction).
The signal input from the input terminal (10) is output from the output terminal (20) at a desired level.

また、制御電圧(V、)を得るものとしては、第5図か
ら理解されるように、E V R(5)を使用するもの
も普及してきており、E V R(5)は、マイクロコ
ンピュータ(5a)と、EEFROM (5b)と、D
/A変換器(5c)とを主体として構成されている。
In addition, as a device for obtaining the control voltage (V, (5a), EEFROM (5b), and D
/A converter (5c).

そして、E E F ROM (5)には、制御電圧(
VC)の値が、その値と一意に対応するV CA (3
)の出力レベルとともに記憶されており、所定操作に従
って(すなわち、出力レベルがある値となるように設定
すると)、マイクロコンピュータ(5a)が、そのとき
の(■、)の値を読み出し、読み出された値の制御電圧
(VC,)はディジタル−アナログ変換されてD/A変
換器(5c)からV CA (3)に印加される。
And the control voltage (
The value of V CA (3
) is stored together with the output level of The control voltage (VC,) having the value obtained is digital-to-analog converted and applied from the D/A converter (5c) to V CA (3).

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかしながら、第4図に示された構成により、経時的に
変動するV CA (3)の出力レベルを所望の値に維
持する場合、ダイオード(D)の温度特性が値(−2)
 [m V / ’C] で一定とされているので、良
好な補正を行うためには、ダイオード(D)、抵抗(R
)等を複雑に接続しなければならない。
However, with the configuration shown in FIG. 4, if the output level of V CA (3), which varies over time, is to be maintained at a desired value, the temperature characteristics of the diode (D) will change to a value (-2).
[mV/'C] is assumed to be constant, so in order to perform good correction, a diode (D) and a resistor (R
) etc. must be connected in a complicated manner.

また、E V R(5)では、温度が変化する度に、い
ちいち手動で制御する必要があり、V CA (3)の
出力レベルが時々刻々と変動すると制御できなくなり、
VCA(3)(7)温度特性は、VCA(3)に使用さ
れるICの温度特性に依存することになる。
In addition, the E VR (5) requires manual control each time the temperature changes, and if the output level of the V CA (3) fluctuates from moment to moment, control becomes impossible.
The temperature characteristics of VCA(3)(7) will depend on the temperature characteristics of the IC used for VCA(3).

本発明の目的は、VCAの出力レベルが温度変化により
変動した場合に、EVRによりその変動が補正されると
ともに、回路構成が簡素化可能な温度特性補正回路を提
供することにある。
An object of the present invention is to provide a temperature characteristic correction circuit in which when the output level of a VCA fluctuates due to a temperature change, the fluctuation is corrected by an EVR and the circuit configuration can be simplified.

〔課題を解決するための手段] 上記目的を達成するために、本発明に係る温度特性補正
回路は、 電圧制御増幅器(3)が設置される環境温度が検出され
る温度検出手段(7)と、 上記環境温度の変化に伴って変動する上記電圧制御増幅
器(3)の出力レベルを、所望の値に制御する制御電圧
が、該電圧制御増幅器に与えられる制御、電圧付与手段
(5a)と、 を備え、 上記制御電圧の値は、上記温度検出手段(7)の検出出
力に対応させて変化される、 ことを特徴とする。
[Means for Solving the Problems] In order to achieve the above object, the temperature characteristic correction circuit according to the present invention comprises: temperature detection means (7) for detecting the environmental temperature in which the voltage control amplifier (3) is installed; , control and voltage applying means (5a) for applying a control voltage to the voltage control amplifier (3) to control the output level of the voltage control amplifier (3), which varies with changes in the environmental temperature, to a desired value; It is characterized in that the value of the control voltage is changed in accordance with the detection output of the temperature detection means (7).

〔作用〕[Effect]

本発明に係る温度特性補正回路では、温度検出手段の検
出出力に対応させて、VCAに与えられる制御電圧の値
が制御電圧付与手段により変化される。
In the temperature characteristic correction circuit according to the present invention, the value of the control voltage applied to the VCA is changed by the control voltage applying means in accordance with the detection output of the temperature detecting means.

〔実施例] 以下、本発明に係る温度特性補正回路の好適な実施例を
、図面に基いて説明する。
[Embodiments] Hereinafter, preferred embodiments of the temperature characteristic correction circuit according to the present invention will be described with reference to the drawings.

第1図において、本発明が適用された温度特性補正回路
(1)は、E V R(5)と、温度センサ(7)と、
EV R(5)のEEPROM (5b)等に所望のデ
ータを入力等するデータ入力部(9)とを主体として構
成されている。
In FIG. 1, a temperature characteristic correction circuit (1) to which the present invention is applied includes an E VR (5), a temperature sensor (7),
It mainly consists of a data input section (9) for inputting desired data into the EEPROM (5b) of the EV R (5), etc.

なお、E V R(5)は、第3図(7) E V R
(5)と略同様に構成されているので、その説明は省略
する。
In addition, E VR (5) is shown in Fig. 3 (7)
Since the configuration is substantially the same as (5), the explanation thereof will be omitted.

温度センサ(温度検出手段)(7)では、VCA(3)
が設置される環境温度が、時々刻々と検出され、その検
出出力信号はマイクロコンピュータ(制御電圧付与手段
) (5a)に設けられたRAM(図示せず)等に逐次
格納される。
In the temperature sensor (temperature detection means) (7), the VCA (3)
The temperature of the environment where the controller is installed is detected moment by moment, and the detected output signals are sequentially stored in a RAM (not shown) provided in the microcomputer (control voltage applying means) (5a).

データ入力部(9)からは、例えば温度変化とVCA(
3)の出力レベル変化との関係が一意に対応されたデー
タ(温度−出力レベル曲線;第2図参照)と、制御電圧
(VC)の変化とVCA(3)の出力レベル変化とが一
意に対応されたデータ(電圧−出力レベル曲線;第3図
参照)とが格納される。
From the data input section (9), for example, temperature change and VCA (
The data (temperature-output level curve; see Figure 2) that uniquely corresponds to the relationship between the change in the output level of 3) and the change in the control voltage (VC) and the output level change of the VCA (3). Corresponding data (voltage-output level curve; see FIG. 3) is stored.

そして、例えば、温度が高くなると出力レベルが比例し
て低下する場合、制御電圧(■、)を大きくして、出力
レベルを高める制御が必要となる。
For example, if the output level decreases proportionally as the temperature rises, it is necessary to control the output level by increasing the control voltage (■,).

この場合、温度センサ(7)からの検出出力をΔ[”C
]とすると、VCA(3)に付与される印加電圧の値は
、下式で与えられ、その演算がマイクロコンピュータ(
5a)で行なわれるとともに、演算結果(VC>は、D
/A変換器(5C)を介してVCA(3)に印加される
In this case, the detection output from the temperature sensor (7) is set to Δ[”C
], the value of the applied voltage applied to the VCA (3) is given by the following formula, and the calculation is performed by the microcomputer (
5a), and the calculation result (VC> is D
/A converter (5C) to the VCA (3).

Vc[V)=(b−a)/(d−c) [V/”CI 
XΔ[°C1以上説明したように本実施例では、VCA
(3)の出力レベルが、温度センサ(7)の検出出力Δ
に対応させて変化される。
Vc[V)=(ba-a)/(d-c)[V/”CI
XΔ[°C1 As explained above, in this embodiment, VCA
The output level of (3) is the detection output Δ of temperature sensor (7)
It is changed according to.

従って、環境温度の変化に伴なうVCA(3)の出力レ
ベル変動がE V R(5)により補正されるとともに
、回路構成を簡素化することができる。
Therefore, fluctuations in the output level of the VCA (3) due to changes in the environmental temperature can be corrected by the E VR (5), and the circuit configuration can be simplified.

なお、VCA(3)の温度特性は、個々のVCAにより
ばらつきがあるが、各々のVCAの温度特性は予め測定
することができるため、その測定結果(温度−出力レベ
ル曲線)に対応する電圧−出力レベル曲線を、データと
してデータ入力部(9)から入力することにより、各々
のVCAに対して適正な補正を行なうことができる。
Note that the temperature characteristics of the VCA (3) vary depending on the individual VCA, but since the temperature characteristics of each VCA can be measured in advance, the voltage - corresponding to the measurement result (temperature - output level curve) By inputting the output level curve as data from the data input section (9), appropriate correction can be performed for each VCA.

〔発明の効果〕〔Effect of the invention〕

以上の説明で理解されるように、本発明に係る温度特性
補正回路では、温度検出手段の検出出力に対応させて、
VCAに与えられる制御電圧の値が制御電圧付与手段に
より変化される。
As can be understood from the above explanation, in the temperature characteristic correction circuit according to the present invention, in response to the detection output of the temperature detection means,
The value of the control voltage applied to the VCA is changed by the control voltage applying means.

従って、制御電圧付与手段を例えばマイクロコンピュー
タを主体として構成することにより、電圧制御増幅器の
温度特性補正をEVRで行なうことができるとともに、
回路構成を簡素化することができる。
Therefore, by configuring the control voltage applying means mainly using a microcomputer, for example, it is possible to correct the temperature characteristics of the voltage control amplifier using the EVR, and
The circuit configuration can be simplified.

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

第1図は、本発明に係る温度特性補正回路の好適な実施
例の構成図、第2図は、EEFROMに格納される温度
−出力レベル相関図、第3図は、EEFROMに格納さ
れる電圧−出力レベル相関図、第4図と第5図は、従来
例の構成図である。 (1)は温度特性補正回路、(3)はVCA、(5)は
EVR,(5a)はマイクロコンピュータ、(5b)は
EEFROM、(7)は温度センサである。
FIG. 1 is a configuration diagram of a preferred embodiment of the temperature characteristic correction circuit according to the present invention, FIG. 2 is a temperature-output level correlation diagram stored in EEFROM, and FIG. 3 is a voltage stored in EEFROM. - Output level correlation diagrams, FIGS. 4 and 5 are configuration diagrams of conventional examples. (1) is a temperature characteristic correction circuit, (3) is a VCA, (5) is an EVR, (5a) is a microcomputer, (5b) is an EEFROM, and (7) is a temperature sensor.

Claims (1)

【特許請求の範囲】 電圧制御増幅器が設置される環境温度が検出される温度
検出手段と、 上記環境温度の変化に伴って変動する上記電圧制御増幅
器の出力レベルを、所望の値に制御する制御電圧が、該
電圧制御増幅器に与えられる制御電圧付与手段と、 を備え、 上記制御電圧の値は、上記温度検出手段の検出出力に対
応させて変化される、 ことを特徴とする温度特性補正回路。
[Scope of Claims] Temperature detection means for detecting the environmental temperature in which the voltage controlled amplifier is installed, and control for controlling the output level of the voltage controlled amplifier, which fluctuates with changes in the environmental temperature, to a desired value. A temperature characteristic correction circuit comprising: a control voltage applying means for applying a voltage to the voltage control amplifier; and the value of the control voltage is changed in accordance with the detection output of the temperature detecting means. .
JP2134544A 1990-05-24 1990-05-24 Temperature characteristic correction circuit Pending JPH0430611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2134544A JPH0430611A (en) 1990-05-24 1990-05-24 Temperature characteristic correction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2134544A JPH0430611A (en) 1990-05-24 1990-05-24 Temperature characteristic correction circuit

Publications (1)

Publication Number Publication Date
JPH0430611A true JPH0430611A (en) 1992-02-03

Family

ID=15130800

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2134544A Pending JPH0430611A (en) 1990-05-24 1990-05-24 Temperature characteristic correction circuit

Country Status (1)

Country Link
JP (1) JPH0430611A (en)

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