KR20030053791A - Voltage-controlled oscillation circuit with function of simple operation select - Google Patents

Voltage-controlled oscillation circuit with function of simple operation select Download PDF

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Publication number
KR20030053791A
KR20030053791A KR1020010083793A KR20010083793A KR20030053791A KR 20030053791 A KR20030053791 A KR 20030053791A KR 1020010083793 A KR1020010083793 A KR 1020010083793A KR 20010083793 A KR20010083793 A KR 20010083793A KR 20030053791 A KR20030053791 A KR 20030053791A
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South Korea
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voltage
control circuit
oscillation
oscillator
circuit
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KR1020010083793A
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Korean (ko)
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김성근
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삼성전기주식회사
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Priority to KR1020010083793A priority Critical patent/KR20030053791A/en
Publication of KR20030053791A publication Critical patent/KR20030053791A/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B27/00—Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
    • H03B5/124—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
    • H03B5/1243—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising voltage variable capacitance diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
    • H03B5/1841—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a strip line resonator
    • H03B5/1847—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a strip line resonator the active element in the amplifier being a semiconductor device

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  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

PURPOSE: A voltage controlled oscillation circuit including an operation selection function is provided to supply selectively one of two oscillation frequencies by using one switching voltage. CONSTITUTION: A voltage controlled oscillation circuit includes the first voltage control circuit(10), the second voltage control circuit(20), and a power switching circuit portion(30). The first voltage control circuit includes the first resonance portion(11) for providing the first resonant frequency, the first oscillation portion(12) for oscillating the first resonant frequency, and the first buffer portion(13) for outputting the oscillation frequency. The second voltage control circuit includes the second resonance portion(21) for providing the second resonant frequency, the second oscillation portion(22) for oscillating the second resonant frequency, and the second buffer portion(23) for outputting the oscillation frequency. The power switching circuit portion supplies the operating voltage to the first or the second voltage control circuit according to a switching voltage.

Description

간단한 동작선택기능을 갖는 전압제어발진회로{VOLTAGE-CONTROLLED OSCILLATION CIRCUIT WITH FUNCTION OF SIMPLE OPERATION SELECT}VOLTAGE-CONTROLLED OSCILLATION CIRCUIT WITH FUNCTION OF SIMPLE OPERATION SELECT}

본 발명은 간단한 동작선택기능을 갖는 전압제어발진회로에 관한 것으로, 특히 하나의 스위칭 전압으로 2개의 발진주파수중 하나의 발진주파수를 선택하여 제공하도록 한 간단한 동작선택기능을 갖는 전압제어발진회로에 관한 것이다.The present invention relates to a voltage controlled oscillator circuit having a simple operation selection function, and more particularly, to a voltage controlled oscillator circuit having a simple operation selection function for selecting and providing one oscillation frequency of two oscillation frequencies with one switching voltage. will be.

현재, 세계적으로 RF 부품은 소형화, 다기능화 되어가는 추세이며, 적용 범위도 다양해지고 있는데,Currently, RF components are becoming smaller and more versatile in the world, and their range of application is also diversified.

도 1은 종래의 듀얼밴드용 전압제어발진회로도로서, 도 1을 참조하면, 종래 듀얼밴드용 전압제어발진회로는 제1 밴드(예;PCS)를 위한 발진주파수를 제공하기 위한 제1 공진부, 발진부 및 버퍼부(11,12,13)를 포함하는 제1 전압제어발진부(10)와, 제2 밴드(예;GPS)를 위한 발진주파수를 제공하기 위한 제2 공진부, 발진부 및 버퍼부(21,22,23)를 포함하는 제2 전압제어발진부(20)로 이루어져 있다.1 is a diagram illustrating a conventional dual band voltage controlled oscillator circuit. Referring to FIG. 1, a conventional dual band voltage controlled oscillator circuit may include a first resonator unit for providing an oscillation frequency for a first band (eg, a PCS); A first voltage controlled oscillator 10 including an oscillator and buffers 11, 12, 13, and a second resonator, oscillator, and buffer unit for providing an oscillation frequency for a second band (eg, GPS); And a second voltage controlled oscillator 20 including 21, 22, and 23.

이러한 구성에서, 상기 제1 발진부(12)의 동작을 선택하기 위한 제1 스위칭전압(Vsw1)을 상기 제1 발진부(12)에 공급하고, 또한, 상기 제2 발진부(22)의 동작을 선택하기 위한 제2 스위칭전압(Vsw2)을 상기 제2 발진부(12)에 공급하도록 구성되어 있다. 상기 각 스위칭전압은 각 발진부의 동작전압으로 공급할 수 있고, 또는 발진부의 출력을 스위칭하는 스위칭 전압으로 공급할 수도 있다.In this configuration, the first switching voltage Vsw1 for selecting the operation of the first oscillator 12 is supplied to the first oscillator 12, and the operation of the second oscillator 22 is selected. It is configured to supply a second switching voltage (Vsw2) for the second oscillator (12). Each of the switching voltages may be supplied as an operating voltage of each oscillator, or may be supplied as a switching voltage for switching the output of the oscillator.

이에 따라, 상기 제1 스위칭전압(Vsw1)이 공급되면 상기 제1 발진부(12)가 동작하여, 제1 밴드용 발진주파수가 출력되고, 또는 제2 스위칭전압(Vsw2)이 공급되면 상기 제2 발진부(22)가 동작하여, 제2 밴드용 발진주파수가 출력된다.Accordingly, when the first switching voltage Vsw1 is supplied, the first oscillator 12 operates to output the first band oscillation frequency, or when the second switching voltage Vsw2 is supplied, the second oscillator. (22) operates to output the oscillation frequency for the second band.

그러나, 이와 같은 종래의 듀얼밴드용 전압제어발진회로에서는, 2개의 밴드를 선택하기 위해서, 2개의 스위칭 전압을 사용하여야 하므로, 그 만큼 구성이 복잡하여 소형화 및 저렴화에 문제점이 있었다.However, in the conventional dual band voltage controlled oscillator circuit, since two switching voltages must be used in order to select two bands, the configuration is so complicated that there is a problem in miniaturization and cost reduction.

본 발명은 상기한 문제점을 해결하기 위해 안출한 것으로, 따라서, 본 발명의 목적은 하나의 스위칭 전압으로 2개의 발진주파수중 하나의 발진주파수를 선택하여 제공하도록 한 간단한 동작선택기능을 갖는 전압제어발진회로를 제공하는데 있다.The present invention has been made to solve the above problems, and therefore, an object of the present invention is to provide a voltage controlled oscillation having a simple operation selection function to select and provide one oscillation frequency of two oscillation frequencies with one switching voltage. To provide a circuit.

도 1은 종래의 듀얼밴드용 전압제어발진회로도이다.1 is a diagram illustrating a conventional dual band voltage controlled oscillator circuit.

도 2는 본 발명에 따른 듀얼밴드용 전압제어발진회로도이다.2 is a circuit diagram illustrating a dual band voltage controlled oscillation circuit according to the present invention.

도 3은 도 2의 전압제어발진회로의 구체적 회로 예시도이다.3 is a diagram illustrating a specific circuit of the voltage controlled oscillation circuit of FIG. 2.

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

11 : 제1 공진부12 : 제1 발진부11: first resonator 12: first oscillator

13 : 제1 버퍼부21 : 제2 공진부13: first buffer 21: second resonator

22 : 제2 발진부23 : 제2 버퍼부22: second oscillation unit 23: second buffer unit

30 : 전원 스위칭 회로부30: power switching circuit

상기한 본 발명의 목적을 달성하기 위한 기술적인 수단으로써, 본 발명의 회로는 튜닝전압에 따라 제1 공진주파수를 제공하는 제1 공진부와, 공급되는 동작전압에 의해 동작하여, 상기 제1 공진부에 의한 공진주파수를 발진시키는 제1 발진부와, 상기 제1 발진부에 의한 발진주파수를 출력하는 제1 버퍼부를 포함하는 제1 전압제어회로; 튜닝전압에 따라 제2 공진주파수를 제공하는 제2 공진부와, 공급되는 동작전압에 의해 동작하여, 상기 제2 공진부에 의한 공진주파수를 발진시키는 제2 발진부와, 상기 제2 발진부에 의한 발진주파수를 출력하는 제2 버퍼부를 포함하는 제2 전압제어회로; 스위칭 전압에 따라 스위칭 동작하여, 동작전압을 상기 제1 전압제어회로 또는 제2 전압제어회로에 공급하는 전원 스위칭 회로부를 구비함을 특징으로 한다.As a technical means for achieving the above object of the present invention, the circuit of the present invention is operated by a first resonator for providing a first resonant frequency in accordance with a tuning voltage and an operating voltage supplied to the first resonator. A first voltage control circuit including a first oscillation unit for oscillating the resonance frequency by the unit and a first buffer unit for outputting the oscillation frequency by the first oscillator; A second resonator for providing a second resonant frequency in accordance with the tuning voltage, a second oscillator for operating the supplied resonant frequency to oscillate the resonant frequency by the second resonator, and an oscillator by the second oscillator A second voltage control circuit including a second buffer unit for outputting a frequency; And a power switching circuit unit configured to switch according to the switching voltage to supply an operating voltage to the first voltage control circuit or the second voltage control circuit.

이하, 본 발명에 따른 간단한 동작선택기능을 갖는 전압제어발진회로에 대하여 첨부도면을 참조하여 그 구성 및 작용을 상세하게 설명한다. 본 발명에 참조된 도면에서 실질적으로 동일한 구성과 기능을 가진 구성요소들은 동일한 부호를 사용할 것이다.Hereinafter, the structure and operation of the voltage controlled oscillation circuit having a simple operation selection function according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

도 2는 본 발명에 따른 듀얼밴드용 전압제어발진회로도이고, 도 3은 도 2의 전압제어발진회로의 구체적 회로 예시도이다.FIG. 2 is a diagram illustrating a dual band voltage controlled oscillator circuit according to the present invention, and FIG. 3 is a diagram illustrating a specific circuit of the voltage controlled oscillator circuit of FIG. 2.

도 2 및 도 3을 참조하면, 본 발명에 따른 전압제어발진회로는 제1 전압제어회로(10), 제2 전압제어회로(20), 및 전원 스위칭 회로부(30)로 구성한다.2 and 3, the voltage controlled oscillation circuit according to the present invention includes a first voltage control circuit 10, a second voltage control circuit 20, and a power switching circuit unit 30.

상기 제1 전압제어회로(10)는 튜닝전압(VT)에 따라 제1 공진주파수를 제공하는 제1 공진부(11)와, 공급되는 동작전압에 의해 동작하여, 상기 제1 공진부(11)에 의한 공진주파수를 발진시키는 제1 발진부(12)와, 상기 제1 발진부(12)에 의한 발진주파수를 출력하는 제1 버퍼부(13)를 포함한다.The first voltage control circuit 10 is operated by a first resonator 11 providing a first resonant frequency according to a tuning voltage VT, and an operating voltage supplied to the first resonator 11. The first oscillation unit 12 for oscillating the resonant frequency by the first and the first buffer unit 13 for outputting the oscillation frequency by the first oscillation unit 12.

상기 제2 전압제어회로(20)는 튜닝전압(VT)에 따라 제2 공진주파수를 제공하는 제2 공진부(21)와, 공급되는 동작전압에 의해 동작하여, 상기 제2 공진부(21)에 의한 공진주파수를 발진시키는 제2 발진부(22)와, 상기 제2 발진부(22)에 의한 발진주파수를 출력하는 제2 버퍼부(23)를 포함한다.The second voltage control circuit 20 operates by the second resonator 21 providing a second resonant frequency according to the tuning voltage VT, and the operating voltage supplied to the second resonator 21. And a second oscillation unit 22 for oscillating the resonance frequency by the second oscillation unit 22, and a second buffer unit 23 for outputting the oscillation frequency by the second oscillation unit 22.

상기 전원 스위칭 회로부(30)는 스위칭 전압(Vsw)에 따라 스위칭 동작하여, 동작전압(Vcc)을 상기 제1 전압제어회로(10) 또는 제2 전압제어회로(20)에 공급한다.The power switching circuit unit 30 switches according to the switching voltage Vsw to supply the operating voltage Vcc to the first voltage control circuit 10 or the second voltage control circuit 20.

상기 전원 스위칭 회로부(30)는 스위칭전압(Vsw)단에 베이스단을 접속하고, 그 에미터단에 동작전압(Vcc)단을 접속하며, 그 컬렉터단을 상기 제1 전압제어회로(10)의 동작전압단에 접속한 제1 PNP 트랜지스터(Q1); 및 상기 제1 PNP 트랜지스터(Q1)의 컬렉터단에 베이스단을 접속하고, 그 에미터단에 동작전압(Vcc)단을 접속하며, 그 컬렉터단을 상기 제2 전압제어회로(20)의 동작전압단에 접속한 제2 PNP 트랜지스터(Q2)로 구성한다.The power supply switching circuit unit 30 connects the base terminal to the switching voltage Vsw terminal, the operating voltage Vcc terminal to the emitter terminal, and operates the collector terminal of the first voltage control circuit 10. A first PNP transistor Q1 connected to the voltage terminal; And a base terminal connected to the collector terminal of the first PNP transistor Q1, an operating voltage Vcc terminal connected to the emitter terminal, and the collector terminal connected to an operating voltage terminal of the second voltage control circuit 20. It consists of the 2nd PNP transistor Q2 connected to.

이와 같이 구성된 본 발명의 바람직한 실시예에 동작을 첨부도면에 의거하여 하기에 상세히 설명한다.Based on the accompanying drawings, the operation of the preferred embodiment of the present invention configured as described above will be described in detail below.

도 2 및 도 3을 참조하면, 먼저, 본 발명의 전원 스위칭 회로부(30)는 스위칭 전압(Vsw)에 따라 스위칭 동작하여, 동작전압(Vcc)을 상기 제1전압제어회로(10) 또는 제2 전압제어회로(20)에 공급한다.2 and 3, first, the power switching circuit unit 30 according to the present invention operates by switching according to a switching voltage Vsw, so that the operating voltage Vcc is changed to the first voltage control circuit 10 or the second. Supply to the voltage control circuit 20.

예를 들어, 상기 스위칭 전압(Vsw)은 적용되는 장치 또는 시스템에서 제공되며, 이 스위칭 전압(Vsw)은 제1 밴드를 선택하기 위해서는 로우레벨로 되고, 반면에, 제2 밴드를 선택하기 위해서는 하이레벨로 된다.For example, the switching voltage Vsw is provided in the apparatus or system to which it is applied, which switching voltage Vsw goes low to select the first band, while high to select the second band. Level.

먼저, 상기 스위칭 전압(Vsw)이 로우레벨일 경우에는 상기 전원 스위칭 회로부(30)의 제1 PNP 트랜지스터(Q1)가 턴온되어, 이 제1 PNP 트랜지스터(Q1)를 통해서 동작전압(Vcc)이 상기 제1 전압제어발진부(10)로 공급된다.First, when the switching voltage Vsw is at a low level, the first PNP transistor Q1 of the power switching circuit unit 30 is turned on, and the operating voltage Vcc is generated through the first PNP transistor Q1. The first voltage controlled oscillator 10 is supplied.

이에 따라, 제1 전압제어발진부(10)가 동작하게 되어, 튜닝전압(VT)에 따라 제1 공진주파수를 제1 공진부(11)가 제공하고, 상기 제1 공진부(11)에 의한 공진주파수를 제1 발진부(12)가 발진시킨후, 이 제1 발진부(12)에 의한 발진주파수를 제1 버퍼부(13)를 통해 출력한다.Accordingly, the first voltage controlled oscillator 10 is operated to provide the first resonant frequency to the first resonator 11 according to the tuning voltage VT, and to perform the resonance by the first resonator 11. After the first oscillator 12 oscillates the frequency, the oscillation frequency by the first oscillator 12 is output through the first buffer unit 13.

다음으로, 상기 스위칭 전압(Vsw)이 하이레벨일 경우에는 상기 전원 스위칭 회로부(30)의 제2 PNP 트랜지스터(Q2)가 턴온되어, 이 제2 PNP 트랜지스터(Q2)를 통해서 동작전압(Vcc)이 상기 제2 전압제어발진부(20)로 공급된다.Next, when the switching voltage Vsw is at a high level, the second PNP transistor Q2 of the power supply switching circuit unit 30 is turned on to operate the voltage Vcc through the second PNP transistor Q2. The second voltage controlled oscillator 20 is supplied.

이에 따라, 제2 전압제어발진부(20)가 동작하게 되어, 튜닝전압(VT)에 따라제2 공진주파수를 제2 공진부(21)가 제공하고, 상기 제2 공진부(21)에 의한 공진주파수를 제2 발진부(22)가 발진시킨후, 이 제2 발진부(22)에 의한 발진주파수를 제2 버퍼부(23)를 통해 출력한다.Accordingly, the second voltage controlled oscillator 20 operates to provide the second resonant frequency 21 by the second resonator 21 according to the tuning voltage VT. After the second oscillator 22 oscillates the frequency, the oscillation frequency by the second oscillator 22 is output through the second buffer unit 23.

전술한 바와 같은 본 발명은 휴대폰뿐만 아니라, 듀얼밴드 튜닝기능을 갖는 통신장치 등과 같이, 듀얼밴드용 전압제어발진기를 갖춘 장치 또는 시스템에 적용될 수 있다. 예를들어, PCS 주파수 대역에 GPS(Global Positioning System )주파수를 추가하여 CDMA+PCS+GPS용으로 사용되는 휴대폰에 적용할 수 있다.As described above, the present invention can be applied not only to a mobile phone but also to a device or a system having a dual band voltage controlled oscillator, such as a communication device having a dual band tuning function. For example, the GPS (Global Positioning System) frequency can be added to the PCS frequency band to be applied to mobile phones used for CDMA + PCS + GPS.

상술한 바와 같은 본 발명에 따르면, 하나의 스위칭 전압으로 2개의 발진주파수중 하나의 발진주파수를 선택하여 제공하도록 함으로서, 구성이 간단하고, 이에 따라 저렴화 및 소형화가 가능하도록 하는 특별한 효과가 있다.According to the present invention as described above, by selecting and providing one of the oscillation frequency of the two oscillation frequency with one switching voltage, the configuration is simple, there is a special effect that can be reduced in cost and miniaturization.

이상의 설명은 본 발명의 구체적인 실시 예에 대한 설명에 불과하고, 본 발명은 이러한 구체적인 실시 예에 한정되지 않으며, 또한, 본 발명에 대한 상술한 구체적인 실시 예로부터 그 구성의 다양한 변경 및 개조가 가능하다는 것을 본 발명이 속하는 기술분야의 통상의 지식을 가진 자는 쉽게 알 수 있다.The above description is only a description of specific embodiments of the present invention, and the present invention is not limited to these specific embodiments, and various changes and modifications of the configuration are possible from the above-described specific embodiments of the present invention. It will be apparent to those skilled in the art to which the present invention pertains.

Claims (2)

튜닝전압(VT)에 따라 제1 공진주파수를 제공하는 제1 공진부(11)와, 공급되는 동작전압(Vcc)에 의해 동작하여, 상기 제1 공진부(11)에 의한 공진주파수를 발진시키는 제1 발진부(12)와, 상기 제1 발진부(12)에 의한 발진주파수를 출력하는 제2 버퍼부(13)를 포함하는 제1 전압제어회로(10);The first resonator 11 provides the first resonant frequency according to the tuning voltage VT, and operates by the supplied operating voltage Vcc to oscillate the resonant frequency of the first resonator 11. A first voltage control circuit (10) including a first oscillator (12) and a second buffer unit (13) for outputting an oscillation frequency by the first oscillator (12); 튜닝전압(VT)에 따라 제2 공진주파수를 제공하는 제2 공진부(21)와, 공급되는 동작전압에 의해 동작하여, 상기 제2 공진부(21)에 의한 공진주파수를 발진시키는 제2 발진부(22)와, 상기 제2 발진부(22)에 의한 발진주파수를 출력하는 제2 버퍼부(23)를 포함하는 제2 전압제어회로(20);A second resonator 21 providing a second resonant frequency according to the tuning voltage VT, and a second oscillator operating by the supplied operating voltage to oscillate the resonant frequency of the second resonator 21. A second voltage control circuit (20) including a second buffer unit (23) for outputting an oscillation frequency by the second oscillator (22); 스위칭 전압(Vsw)에 따라 스위칭 동작하여, 동작전압(Vcc)을 상기 제1 전압제어회로(10) 또는 제2 전압제어회로(20)에 공급하는 전원 스위칭 회로부(30)를 구비함을 특징으로 하는 간단한 동작선택기능을 갖는 전압제어발진회로.And a power switching circuit unit 30 for switching according to the switching voltage Vsw and supplying the operating voltage Vcc to the first voltage control circuit 10 or the second voltage control circuit 20. Voltage controlled oscillator circuit with simple operation selection function. 제1항에 있어서, 상기 전원 스위칭 회로부(30)는The method of claim 1, wherein the power switching circuit section 30 스위칭전압(Vsw)단에 베이스단을 접속하고, 그 에미터단에 동작전압(Vcc)단을 접속하며, 그 컬렉터단을 상기 제1 전압제어회로(10)의 동작전압단에 접속한 제1 PNP 트랜지스터(Q1); 및A first PNP in which a base end is connected to the switching voltage Vsw end, an operating voltage Vcc end is connected to the emitter end thereof, and the collector end thereof is connected to an operating voltage end of the first voltage control circuit 10; Transistor Q1; And 상기 제1 PNP 트랜지스터(Q1)의 컬렉터단에 베이스단을 접속하고, 그 에미터단에 동작전압(Vcc)단을 접속하며, 그 컬렉터단을 상기 제2 전압제어회로(20)의 동작전압단에 접속한 제2 PNP 트랜지스터(Q2)로 구성함을 특징으로 하는 간단한 동작선택기능을 갖는 전압제어발진회로.The base terminal is connected to the collector terminal of the first PNP transistor Q1, the operating voltage Vcc terminal is connected to the emitter terminal, and the collector terminal is connected to the operating voltage terminal of the second voltage control circuit 20. A voltage controlled oscillation circuit having a simple operation selection function, characterized by comprising a second PNP transistor (Q2) connected thereto.
KR1020010083793A 2001-12-24 2001-12-24 Voltage-controlled oscillation circuit with function of simple operation select KR20030053791A (en)

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KR100835979B1 (en) * 2007-04-30 2008-06-09 한국전자통신연구원 Voltage controlled oscillator with the switching bias
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