JPS5842312A - Square wave oscillator - Google Patents

Square wave oscillator

Info

Publication number
JPS5842312A
JPS5842312A JP14135981A JP14135981A JPS5842312A JP S5842312 A JPS5842312 A JP S5842312A JP 14135981 A JP14135981 A JP 14135981A JP 14135981 A JP14135981 A JP 14135981A JP S5842312 A JPS5842312 A JP S5842312A
Authority
JP
Japan
Prior art keywords
resistor
capacitor
transistor
variable
square wave
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
JP14135981A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Goto
後藤芳之
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP14135981A priority Critical patent/JPS5842312A/en
Publication of JPS5842312A publication Critical patent/JPS5842312A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/282—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable
    • H03K3/2823—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable using two active transistor of the same conductivity type

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

PURPOSE:To make the use of an oscillator easier, by splitting a capacitor being a time constant of a multivibrator into two, inserting a resistor to the emitter of a transistor (TR) between the capacitors, and varying the inserted resistor. CONSTITUTION:A capacitor being a time constant between a base of a TR1 and a resistor 2 at a collector side of a TR opposite to the TR1, is split into two to form a capacitor 4 of the collector of the TR1 and a capaitor 5 at the base. A resistor 6 is inserted between the splitting point of the capacitors 4 and 5 and GND at the emitter side of the TR1. The oscillating frequency is changed by varying the resistance value of the resistor 6.

Description

【発明の詳細な説明】 本発明は、方形波発振器としてマルチバイブレータ−を
用い、周波数を可変にするための可変抵抗として、従来
の時定数となる可変抵抗の他に、コンデンサーを２分割
して、分割点の抵抗を可変にすることにより、周波数を
ｑＪ変にする方形波発振器に関するものである。Detailed Description of the Invention The present invention uses a multivibrator as a square wave oscillator, and uses a capacitor divided into two as a variable resistor to vary the frequency, in addition to the conventional variable resistor that serves as a time constant. , relates to a square wave oscillator whose frequency is varied by qJ by making the resistance at the dividing point variable.

従来、マルチバイブレータ−の周波数を可変にする方法
として、第１図のような、ベースと電源側につながれた
抵抗を可変にする方法がとられてきた。このベースと電
源側の抵抗は、第２図のように、トランジスターやＦＥ
Ｔにより電圧で可変にする事が附来る。この場合、コモ
ン側が電源側となってしまうので、使用しに（いという
欠点があった。Conventionally, as a method of making the frequency of a multivibrator variable, a method has been used in which a resistor connected to the base and the power supply side is made variable, as shown in FIG. This base and power supply side resistance is connected to a transistor or FE as shown in Figure 2.
T allows for variable voltage. In this case, the common side becomes the power supply side, which has the disadvantage of making it difficult to use.

本発明は、この欠点を改善するために発明されたもので
あり、これを第３図により説明してゆくと、トランジス
ター（１）のベース側につながれた抵抗（３）は、その
ままとして、トランジスタ（１）のベースと、反対側の
トランジスターのコレクター側抵抗（２）との間の時定
数となるコンデンサーを２分割し、トランジスター（１
）のコレクター側のコンデンサー（４）とベース側のコ
ンデンサー（５）とする。このコンデンサー（４）とコ
ンデンサー（５）の分割点とトランジスター（１）のエ
ミッタ側であるＧＮＤの間に抵抗（６）をそう人する。The present invention was invented to improve this drawback, and to explain this with reference to FIG. Divide the capacitor that serves as the time constant between the base of transistor (1) and the collector side resistor (2) of the transistor on the opposite side into two, and
) on the collector side (4) and the base side capacitor (5). A resistor (6) is placed between the dividing point between the capacitor (4) and the capacitor (5) and GND, which is the emitter side of the transistor (1).

この分割、ｔとＧＮＤの間の抵抗（６）の抵抗値を可変
にすると、発振周波数が可変となる。電源電圧（７）は
一定とする。。By making the resistance value of the resistor (6) between this division and t and GND variable, the oscillation frequency becomes variable. The power supply voltage (7) is assumed to be constant. .

トランジスター（１）のベース側抵抗（８）の抵抗値を
Ｒｂとし、コレクター側コンデンサー（４）の容量なＣ
ｃ、ベース側コンデンサー（５）の容量をｃｂとし、分
割点とＧＮＤ間の抵抗（６）の抵抗値をＲｔとすると、
発振周波数Ｆはとなり、分割点とＧＮＤ間の抵抗（６）
の値Ｒｔを可変にすると発振周波数Ｆは可変となる。The resistance value of the base side resistor (8) of the transistor (1) is Rb, and the capacitance of the collector side capacitor (4) is C.
c. Let cb be the capacitance of the base side capacitor (5), and let Rt be the resistance value of the resistor (6) between the dividing point and GND.
The oscillation frequency F is, and the resistance between the dividing point and GND (6)
By making the value Rt variable, the oscillation frequency F becomes variable.

この応用例として、分割点とＧＮＤ間の抵抗（６）の代
りにトランジスター（８）を用いると、第４図のように
なる。トランジスター（８）のベースに抵抗（９）を通
して電圧（ｌＯ）を加えると、電圧（ｌＯ）に比例して
発振周波数が可変になる。又、このトランジスター（８
）の代りにＦＥＴを用いれば、より良好なものが得られ
る。As an example of this application, if a transistor (8) is used in place of the resistor (6) between the dividing point and GND, the result will be as shown in FIG. When a voltage (lO) is applied to the base of the transistor (8) through the resistor (9), the oscillation frequency becomes variable in proportion to the voltage (lO). Also, this transistor (8
), a better result can be obtained if an FET is used instead.

本発明は、以上に説明した様に、マルチバイブレータ−
の時定数となるコンデンサーを２分割しその間とトラン
ジスターのエミッタ側に抵抗をそう人し、そう人した抵
抗を可変にする事により発振周波数を可変とする、使用
に便利で、簡単な方形波発振器です。As explained above, the present invention is a multivibrator.
A convenient and simple square wave oscillator that divides the capacitor that serves as the time constant into two, places a resistor between them and the emitter side of the transistor, and makes the oscillation frequency variable by making the resistor variable. is.

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

第１図　従来の無安定マルチノ（イブレータ−第２図　
トランジスターにより電圧可変ＩＮ波数発振器とした無
安定マルチノくイブレータ−第３図　本発明の無安定マ
ルチノ（イブレータ−第４図　トランジスターやこより
電圧可変周波数発振器とした本発明の無安定マルチノ（
イブレータｌ−発倣用トランシスター　２−コレクター
イｔＡＩ抵抗　３一時定数となる抵抗　４−２公害ＩＩ
　したコレクター側コンデンサー　　５−２公害＋＋し
たべ一４側コンデンサー　６−分割点シこそう大した抵
抗７−電源電圧　８−電圧可変周波数とするトランジス
ター　９−８のベース側抵抗　１〇−周波数を可変にす
る電圧 特許出願人　後　藤　芳　之 第２図 第　３図 第４図Fig. 1 Conventional astable Martino (ibrator - Fig. 2)
An unstable multi-noise oscillator using a transistor as a voltage-variable IN wave number oscillator - Fig. 3 An astable multi-noise oscillator of the present invention as an oscillator - Fig. 4 An astable multi-noise oscillator of the present invention as a voltage-variable frequency oscillator using a transistor
Ibrator l - Transistor for copying 2 - Collector I resistance 3 Resistance that becomes a temporary constant 4-2 Pollution II
collector side capacitor 5-2 pollution + + top 4 side capacitor 6- large resistance at the dividing point 7- power supply voltage 8- transistor with voltage variable frequency 9-8 base side resistance 10- variable frequency Applicant for voltage patent Yoshiyuki Goto Figure 2 Figure 3 Figure 4

Claims (1)

【特許請求の範囲】[Claims] 方形波発振器として、マルチバイブレータ−を用い、時
定数となる抵抗を、そのままにして用い時定数となるコ
ンデンサーを２分割し、その分割点と、トランジスター
のエミッタ側との間に、抵抗をそう人した方形波発振器
。A multivibrator is used as a square wave oscillator, and the resistor that serves as the time constant is left as is.The capacitor that serves as the time constant is divided into two, and a resistor is placed between the dividing point and the emitter side of the transistor. square wave oscillator.
JP14135981A 1981-09-07 1981-09-07 Square wave oscillator Pending JPS5842312A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14135981A JPS5842312A (en) 1981-09-07 1981-09-07 Square wave oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14135981A JPS5842312A (en) 1981-09-07 1981-09-07 Square wave oscillator

Publications (1)

Publication Number Publication Date
JPS5842312A true JPS5842312A (en) 1983-03-11

Family

ID=15290141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14135981A Pending JPS5842312A (en) 1981-09-07 1981-09-07 Square wave oscillator

Country Status (1)

Country Link
JP (1) JPS5842312A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351153A2 (en) * 1988-07-11 1990-01-17 Matsushita Electric Industrial Co., Ltd. Frequency modulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351153A2 (en) * 1988-07-11 1990-01-17 Matsushita Electric Industrial Co., Ltd. Frequency modulator

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