KR900006543Y1 - Voltage control oscillator - Google Patents

Voltage control oscillator Download PDF

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Publication number
KR900006543Y1
KR900006543Y1 KR2019870011316U KR870011316U KR900006543Y1 KR 900006543 Y1 KR900006543 Y1 KR 900006543Y1 KR 2019870011316 U KR2019870011316 U KR 2019870011316U KR 870011316 U KR870011316 U KR 870011316U KR 900006543 Y1 KR900006543 Y1 KR 900006543Y1
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South Korea
Prior art keywords
transistor
voltage
capacitor
schmitt trigger
diode
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KR2019870011316U
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Korean (ko)
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KR890003731U (en
Inventor
김귀동
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삼성전자 주식회사
안시환
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Priority to KR2019870011316U priority Critical patent/KR900006543Y1/en
Publication of KR890003731U publication Critical patent/KR890003731U/en
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Publication of KR900006543Y1 publication Critical patent/KR900006543Y1/en

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    • 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
    • H03K3/286—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 bistable
    • H03K3/2893—Bistables with hysteresis, e.g. Schmitt trigger
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/01—Details
    • H03K3/011—Modifications of generator to compensate for variations in physical values, e.g. voltage, temperature

Abstract

내용 없음.No content.

Description

전압 조절 발진회로Voltage Controlled Oscillator Circuit

본 고안의 회로도.Circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

ST : 슈미트 트리거 Q1-Q3: 트렌지스터ST: Schmitt Trigger Q 1 -Q 3 : Transistor

D1, D2: 다이오드 C1: 콘덴서D 1 , D 2 : Diode C 1 : Condenser

Vc : 전압조절기Vc: Voltage regulator

본 고안은 1MHz이상의 주파수 범위에서 전압에 의하여 발진 주파수를 조정하고자 하는 모든 전자 기기에 사용할 수 있도록한 전압 조절 발진 회로에 관한 것이다.The present invention relates to a voltage controlled oscillator circuit that can be used in all electronic devices to adjust the oscillation frequency by the voltage in the frequency range of 1MHz or more.

종래에는 전압 조절 발진 회로를 구성하기 위해서는 많은 부품을 사용하여야 되므로 구성이 복잡해지고 일반적으로 손쉽게 사용할 수 없는 단점이 있었다.In the related art, since many components must be used in order to configure a voltage controlled oscillation circuit, the configuration becomes complicated and generally cannot be easily used.

본 고안은 이와 같은 점을 감안하여 입력이 어느 레벨이상이 되면 출력 상태가 변하는 슈미트 트리거에 전압 조절기로 충전 전압이 결정되는 콘덴서와 콘덴서의 충전 전압을 방전시켜 주는 트랜지스터를 연결하여 간단하게 구성할 수 있으며 손쉽게 사용할 수 있도록 한 전압 조절 발진회로로써 이를 첨부 도면에 의하여 상세히 설명하면 다음과 같다.In view of the above, the present invention can be easily configured by connecting a capacitor that discharges the charge voltage of the capacitor and a capacitor that determines the charge voltage with a voltage regulator to the Schmitt trigger that the output state changes when the input level is higher than a certain level. And as a voltage-controlled oscillation circuit for easy use described in detail by the accompanying drawings as follows.

전압 조절기(Vc)에 의해 조절되는 전류(i1)가 다이오드(D1)를 통하여 트랜지스터(Q1)(Q2)의 베이스에 인가됨과 동시에 다이오드(D2)를 통하여 콘덴서(C1)에 충전된후 슈미트 트리거(ST)에 입력되게 구성하고 전원(+V)이 인가되는 슈미트 트리거(ST)의 출력은 에미터가 접지된 트랜지스터(Q3)의 베이스에 인가되게 구성하며 트랜지스터(Q3)의 콜렉터측에는 트랜지스터(Q1)(Q2)의 에미터를 연결 구성한후 트랜지스터(Q2)의 콜렉터측에는 다이오드(D2)를 통하여 인가되는 전류(i1)가 인가되도록 구성한다.The current i 1 regulated by the voltage regulator Vc is applied to the base of the transistor Q 1 and Q 2 through the diode D 1 and simultaneously to the capacitor C 1 through the diode D 2 . the output of the after charging the Schmitt trigger (ST) which is applied to a Schmitt trigger (ST) to be configured, and the power (+ V) input to the configuration to be applied to the base of an emitter grounded transistor (Q 3) and a transistor (Q 3 ) of the side is configured to be applied to the transistor (Q 1) (the emitter is applied via the collector side of the diode (D 2) of the transistor (Q 2) connected after configuring the current (i 1 of the 2 Q)) is the collector.

이와 같이 구성된 본 고안에서 전압 조절기(Vc)에 의해 그값이 변하게 되는 전류(i1)는 다이오드(D2)를 통하여 콘덴서(C1)에 충전되어 짐과 동시에 다이오드(D1)를 통하여 트랜지스터(Q2)(Q3)의 베이스에 인가되게 되나 트랜지스터(Q1)(Q2)의 구동은 에미터측에 연결된 트랜지스터(Q3)의 구동에 의해서만 제어되게 된다.In the present invention configured as described above, the current i 1 whose value is changed by the voltage regulator Vc is charged in the capacitor C 1 through the diode D 2 , and at the same time, the transistor D through the diode D 1 . It is applied to the base of Q 2 ) (Q 3 ), but the driving of transistors Q 1 and Q 2 is controlled only by the driving of transistor Q 3 connected to the emitter side.

최초의 상태에서 전류(i1)는 다이오드(D2)를 통하여 콘덴서(C1)에 충전되어 지나 충전 전압이 슈미트 트리거(ST)의 드레스 홀드(thres hold)전압을 넘지 못하므로 슈미트 트리거(ST)의 출력은 로우레벨이 되어 트랜지스터(Q3)는 "오프"상태가 되며 트랜지스터(Q3)의 "오프"로 트랜지스터(Q1)(Q2)도 "오프"상태가 된다.In the initial state, the current i 1 is charged to the capacitor C 1 through the diode D 2 , and the charging voltage does not exceed the threshold hold voltage of the Schmitt trigger ST. ) of the output becomes a low level, and the transistor (Q 3) is "off" state and is also the "off" state to the "off" transistor (Q 1) (Q 2) of the transistor (Q 3).

그러나 콘덴서(C1)에 다이오드(D2)를 통한 전류(i1)가 첨차 충전도어 콘덴서(C1)의 충전 전압갑이 슈미트 트리거(ST)의 드레스 홀드 전압 이상이 되었을때 슈미트 트리거(ST)의 출력은 하이레벨로 반전되어지며 이러한 슈미트 트리거의 하이레벨 출력은 트랜지스터(Q3)의 베이스에 인가되어 트랜지스터(Q3)를 "턴온"시켜 주게되므로써 전류(i1)가 다이오드(D1)를 통하여 베이스에 인가되는 트랜지스터(Q1)(Q2)도 "턴온"하게 된다.However, a Schmitt trigger when a current (i 1) through the diode (D 2) to the capacitor (C 1) is a cheomcha charging door dress hold voltage over the capacitor (C 1) the charge voltage pack of the Schmitt trigger (ST) of (ST ), the output of which becomes inverted to a high level, the high level output of this Schmidt trigger is applied to the base of the transistor (Q 3) transistor (Q 3), the "turn-on" to give doemeurosseo current (i 1) the diode (D 1 Transistor Q 1 (Q 2 ) applied to the base through the () is also "turned on".

따라서 콘덴서(C1)에 충전된 전하는 트랜지스터(Q2)의 콜렉터에서 에미터를 통한후 트랜지스터(Q3)를 통하여 접지로 방전되어 진다.Therefore, the charge charged in the capacitor C 1 is discharged to ground through the transistor Q 3 through the emitter at the collector of the transistor Q 2 .

즉 콘덴서(C1)의 충전 전압이 높아져 슈미트 트리거(ST)의 드레스 홀드 전압 이상이 되면 슈미트 트리거(ST)는 하이레벨을 출력시켜 트랜지스터(Q3)를 "턴온"시키고 트랜지스터(Q3)는 트랜지스터(Q1)(Q2)를 "턴온"시켜 주어 콘덴서(C1)에 충전되 전하를 방전시켜 주는 것이다.That is the capacitor (C 1) the higher the charging voltage of when the dress hold voltage or higher of the Schmitt trigger (ST) the Schmitt trigger (ST) is a transistor (Q 3) to output a high level and "turn on" the transistor (Q 3) is The transistors Q 1 and Q 2 are "turned on" to discharge the charge charged in the capacitor C 1 .

그리고 콘덴서(C1)의 방전이 계속되어 콘덴서(C1)의 전압이 슈미트 트리거(ST)의 드레스 홀드 전압이하가 되면 다시 슈미트 트리거(ST)의 출력은 로우레벨이 되고 이러한 로우레벨출력은 트랜지스터(Q1-Q3)를 "턴오프"시켜 주므로써 콘덴서(C1)는 더이상 방전을 하지 않고 또다시 다이오드(D2)를 통한 전류(i1)에 의하여 충전되어지게 된다.In addition, the output of the capacitor (C 1) is still a discharge of the capacitor (C 1) when voltage is a dress threshold voltage or less of the Schmitt trigger (ST) back to the Schmitt trigger (ST) of the are at the low level of these low-level output transistor By turning off (Q 1 -Q 3 ), capacitor C 1 is no longer discharged and is again charged by current i 1 through diode D 2 .

따라서 콘덴서(C1)의 충전 전압이 슈미트 트리거(ST)의 드레스 홀드 전압 이상으로 또 다시 충전되면 슈미트 트리거(ST)의 출력은 다시 하이레벨이 되어 트랜지스터(Q1-Q3)를 "턴온"시킴으로써 콘덴서(C1)를 방전시키게 되는 동작 상태가 계속 반복되면서 슈미트 트리거(ST)의 출력측으로 일정한 주기의 주파수를 발진시키게 된다.Therefore, when the charging voltage of the capacitor C 1 is charged again above the dress hold voltage of the Schmitt trigger ST, the output of the Schmitt trigger ST becomes high level again to turn on the transistors Q 1 -Q 3 . As a result, the operation state for discharging the capacitor C 1 is repeatedly repeated, thereby oscillating a frequency of a certain period to the output side of the Schmitt trigger ST.

즉 콘덴서(C1)의 충전 전압과 슈미트 트리거(ST)의 드레스 홀드 전압과의 관계로 인하여 주파수 발진을 계속하게 되는 것으로 이때 전압 조절기(Vc)의 전압을 조절하여 전류(i1)의 값을 변화시켜 줌에 따라서 콘덴서(C1)의 충전 전압을 변화시켜 줄 수 있으므로 슈미트 트리거(ST)의 출력 주파수를 가변시켜 줄 수 있는 것이다.That is, frequency oscillation is continued due to the relationship between the charging voltage of the capacitor C 1 and the dress hold voltage of the Schmitt trigger ST. At this time, the voltage of the voltage regulator Vc is adjusted to adjust the value of the current i 1 . Since the charging voltage of the condenser C 1 can be changed according to the change, the output frequency of the Schmitt trigger ST can be varied.

이상에서와 같이 본 고안은 슈미트 트리거에 트랜지스터와 콘덴서 및 다이오드를 연결한후 전압 조절기에 의해 가변되는 전류를 슈미트 트리거에서 일정 주파수를 출력시키도록 구성한 것으로써 기존의 슈미트 트리거에 약간의 주변 부품만으로도 전압조절 발진 회로를 구성할 수 있어 회로의 구성이 용이해지고 누구든지 손쉽게 사용할 수 있는 편리함이 있는 것이다.As described above, the present invention is configured to output a constant frequency from the Schmitt trigger by connecting a transistor, a capacitor, and a diode to the Schmitt trigger and outputting a constant frequency from the Schmitt trigger. The adjustable oscillator circuit can be configured to facilitate the configuration of the circuit and to be easily used by anyone.

Claims (1)

전압조절기(Vc)로 조절되는 전류(i1)는 다이오드(D1)(D2)를 통하여 콘덴서(C1)에 충전됨과 동시에 트랜지스터(Q1)(Q2)의 베이스와 콜렉터에 인가되게 구성하고 콘덴서(C1)의 충전 전압이 인가되는 슈미트 트리거(ST)의 출력측에는 트랜지스터(Q3)의 베이스를 연결하며 트랜지스터(Q3)의 콜렉터에는 트랜지스터(Q1)(Q2)의 에미터가 연결되게 구성한 전압 조절 발진회로.The current i 1 regulated by the voltage regulator Vc is charged to the capacitor C 1 through the diode D 1 and D 2 and simultaneously applied to the base and the collector of the transistor Q 1 and Q 2 . configuration and the emitter of the capacitor (C 1) charging the output of the Schmitt trigger (ST) which is the applied voltage is connected to the base of the transistor (Q 3), and has the collector of the transistor (Q 3) transistor (Q 1) (Q 2) of the Voltage controlled oscillator circuit configured to connect the rotor.
KR2019870011316U 1987-07-10 1987-07-10 Voltage control oscillator KR900006543Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870011316U KR900006543Y1 (en) 1987-07-10 1987-07-10 Voltage control oscillator

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Application Number Priority Date Filing Date Title
KR2019870011316U KR900006543Y1 (en) 1987-07-10 1987-07-10 Voltage control oscillator

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KR890003731U KR890003731U (en) 1989-04-13
KR900006543Y1 true KR900006543Y1 (en) 1990-07-26

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KR2019870011316U KR900006543Y1 (en) 1987-07-10 1987-07-10 Voltage control oscillator

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990013062A (en) * 1997-07-31 1999-02-25 윤종용 Oscillation Circuit by Capacitance Control

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