KR950002558Y1 - Variable oscillator - Google Patents
Variable oscillator Download PDFInfo
- Publication number
- KR950002558Y1 KR950002558Y1 KR2019930007383U KR930007383U KR950002558Y1 KR 950002558 Y1 KR950002558 Y1 KR 950002558Y1 KR 2019930007383 U KR2019930007383 U KR 2019930007383U KR 930007383 U KR930007383 U KR 930007383U KR 950002558 Y1 KR950002558 Y1 KR 950002558Y1
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- KR
- South Korea
- Prior art keywords
- switch
- resonant
- capacitor
- circuit
- air coil
- Prior art date
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Classifications
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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
- 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
-
- 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
- H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
- H03B2201/02—Varying the frequency of the oscillations by electronic means
- H03B2201/0208—Varying the frequency of the oscillations by electronic means the means being an element with a variable capacitance, e.g. capacitance diode
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- Oscillators With Electromechanical Resonators (AREA)
Abstract
내용 없음.No content.
Description
제1도는 일반적인 쏘 레조네이터의 등기회로가 고주파 변조용 집적 회로에 연결되는 상태도.1 is a state diagram in which a registration circuit of a general saw resonator is connected to an integrated circuit for high frequency modulation.
제2도는 본 고안에 따른 가변용 공진회로의 회로도이다.2 is a circuit diagram of a variable resonance circuit according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 고주파 변조용 집적회로 3 : 쏘 레조네이터(SAW RESONATOR)1: integrated circuit for high frequency modulation 3: saw resonator
5 : 가변용 공진회로 C1, C2, C3, C4, C5: 커패시터5: variable resonant circuit C 1 , C 2 , C 3 , C 4 , C 5 : capacitor
SW, SWA : 스위치 L1, L2: 에어 코일SW, SWA: Switch L 1 , L 2 : Air coil
본 고안은 공진 주파수를 발생시키는 공진회로에 관한 것으로, 특히 결합된 스위치의 스위칭에 따라 서로 다른 복수개의 공진 주파수를 발생시킬 수 있는 가변용 공진회로에 관한 것이다.The present invention relates to a resonant circuit for generating a resonant frequency, and more particularly to a variable resonant circuit capable of generating a plurality of different resonant frequencies in accordance with the switching of the combined switch.
일반적으로 NTSC 방송 방식용 고주파 변조용 집적회로에는 쏘 레조네이터(SAW RESONATOR)가 제1도에 도시된 바와같이 연결된다.In general, a SAW RESONATOR is connected to the NTSC broadcasting high frequency modulation integrated circuit as shown in FIG.
즉, 고주파 변조용 집적회로(1)는 단자(7)가 절환용 스위치(SW)를 통하여 접지되고, 단자(9), (10), (11)가 쏘 레조네이터(SAW RESONATOR)(3)의 로우 채널용 단자, 하이 채널용 단자 및 공통단자에 각각 연결된다. 그리고 쏘 레조네이터(3)의 공통 단자는 커패시터(C1)를 통하여 접지된다. 또한 전원단자(B+)는 저항(R1)을 통하여 고주파 변조용 집적회로(1)의 단자(11) 및 쏘 레조네이터(3)의 공통단자에 연결된다.That is, in the high frequency modulation integrated circuit 1, the terminal 7 is grounded through the switching switch SW, and the terminals 9, 10, and 11 are connected to the saw resonator 3. It is connected to the low channel terminal, the high channel terminal and the common terminal, respectively. The common terminal of the saw resonator 3 is grounded through the capacitor C 1 . In addition, the power supply terminal B + is connected to the terminal 11 of the high frequency modulation integrated circuit 1 and the common terminal of the saw resonator 3 through the resistor R 1 .
여기서, 일측이 접지된 커패시터(C2), (C3)는 고주파 변조용 집적회로(1)의 단자(10), (9)에 각각 연결된다.Here, the capacitors C 2 and C 3 having one side grounded are connected to terminals 10 and 9 of the integrated circuit 1 for high frequency modulation.
한편, 상기 고주파 변조용 집적회로(1)는 스위치(SW)가 오프(off)될 때 쏘 레조네이터(3)에서 공진한 로우 채널(low channel)즉, 3채널의 공진주파수를 단자(9)로 입력하여 상기 3채널의 발진주파수(fp)를 단자(15)로 출력한다.On the other hand, the high frequency modulation integrated circuit 1 has a low channel, that is, a three-channel resonant frequency resonant in the saw resonator 3 when the switch SW is turned off. It inputs and outputs the oscillation frequency (fp) of the three channels to the terminal (15).
또한 상기 고주파 변조용 집적회로(1)는 스위치(SW)가 온(on)될 때 쏘 레조네이터(3)에서 공진한 하이 채널(high channel) 즉, 4채널의 공진주파수를 단자(10)로 입력하여 상기 4채널의 발진주파수(fp)를 단자(15)로 출력한다.In addition, the high frequency modulation integrated circuit 1 inputs a high channel, ie, four channels of resonant frequencies, resonated by the saw resonator 3 to the terminal 10 when the switch SW is turned on. The oscillation frequency fp of the four channels is output to the terminal 15.
따라서, 종래의 고주파 변조용 집적회로는 쏘 레조네이터를 연결하여 사용할 경우 1개 내지 2개의 채널의 발진주파수만을 발생시킬 수 밖에 없다는 문제점을 가지며 상기 쏘 레조네이터가 가격적으로 비싸다는 문제점이 있게 된다.Therefore, the conventional high frequency modulation integrated circuit has a problem that only the oscillation frequency of one or two channels can be generated when the saw resonator is used in connection, and the saw resonator is expensive.
본 고안은 상기한 문제점을 해결하기 위하여 결합된 스위치의 절환에 따라 복수개의 공진 주파수를 가변시킬 수 있는 공진회로를 제공하고자 하는데 그 목적이 있다.An object of the present invention is to provide a resonant circuit capable of varying a plurality of resonant frequencies in accordance with switching of a combined switch to solve the above problems.
본 고안은 상기한 목적을 달성하기 위하여 고주파 발진용 집적회로에 연결되어 공진 주파수를 발생시키는 공진회로에 있어서, 커패시터와, 상기 커패시터의 양단 사이에서 직렬 연결된 제1에어코일과 커패시터 및 제2에어코일과, 일측이 상기 제2에어코일의 일측에 연결되고 타측이 상기 직렬 연결된 커패시터와 제2에어코일 사이의 접점에 스위칭하는 스위치를 구비하며 상기 스위치의 스위치에 따라 서로 다른 복수개의 공진주파수를 발생시키는 것을 특징으로 한다.The present invention is a resonant circuit connected to a high frequency oscillating integrated circuit to generate a resonant frequency in order to achieve the above object, a capacitor, a first air coil and a capacitor and a second air coil connected in series between both ends of the capacitor And a switch having one side connected to one side of the second air coil and the other side switched to a contact point between the series-connected capacitor and the second air coil and generating a plurality of different resonant frequencies according to the switch of the switch. It is characterized by.
이하 본 고안을 도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the drawings.
제2도를 참조하면, NTSC 방송 방식용 고주파 변조용 집적회로(1)는 단자(9), (11)는 가변용 공진회로(5)에 연결된다.Referring to FIG. 2, the NTSC broadcasting high frequency modulation integrated circuit 1 is connected to the terminals 9 and 11 to the variable resonance circuit 5.
즉, 가변용 공진회로(5)의 직렬 연결된 에어코일(air coil)(L1)과 커패시터(C4) 및 에어코일(L4)가 상기 단자(9), (10) 사이에 연결되고, 커패시터(C5)가 직렬 연결된 에어코일(L1)과 커패시터(C4) 및 에어코일(L2)의 회로 양단에 병렬로 연결되며, 상기 고주파 변조용 집적회로(1)의 단자(9)에 접속되는 에어코일(L2)의 접속점에 일측이 연결되는 스위치(SWA)가 (C4)와 에어코링(L2) 사이의 접점(A)을 스위칭하게 연결된다.That is, an air coil L 1 , a capacitor C 4 , and an air coil L 4 connected in series of the variable resonance circuit 5 are connected between the terminals 9 and 10. A capacitor C 5 is connected in parallel to both ends of the air coil L 1 , a capacitor C 4 , and an air coil L 2 connected in series, and a terminal 9 of the integrated circuit 1 for high frequency modulation. A switch SWA at which one side is connected to a connection point of the air coil L 2 connected to the switch is connected to switch the contact point A between the C 4 and the air coil L 2 .
따라서, 상기 가변용 공진회로(5)는 스위치(SWA)가 상기 접점(A)에 오프(off)될 때 3채널 공진주파수(resonant frequency), 즉 Fr은Accordingly, the variable resonant circuit 5 has a three-channel resonant frequency, ie, Fr, when the switch SWA is turned off at the contact A.
로 되고 3채널의 반 공진 주파수(antiresonant frequency), 즉 Fa는The three-channel antiresonant frequency, Fa
로 된다.It becomes
한편, 상기 가변용 공진회로는 스위치가 상기 접점(A)에 온(on)될 때 4채널의 공진 주파수 즉, Fr은In the variable resonant circuit, when the switch is turned on at the contact point A, the resonance frequency of four channels, that is, Fr is
로 되고 4채널의 반 공진 주파수 즉, Fa는The four-channel anti-resonance frequency, Fa
로 된다.It becomes
그러므로 상기 가변용 공진회로(5)는 상기 스위치(SWA)가 온/오프 됨에 따라 에어코일(L1), (L2)의 총 용량값을 변화시켜 원하는 주파수의 공진 주파수를 발생시킬 수 있게 된다.Therefore, the variable resonant circuit 5 may generate a resonant frequency of a desired frequency by changing the total capacitance values of the air coils L 1 and L 2 as the switch SWA is turned on / off. .
따라서, 상기 고주파 변조용 집적회로(1)는 스위치(SWA)가 오프될 때 IC 공진회로(5)에서 로우 채널의 공진 주파수를 단자(9)로 입력하여 상기 로우채널의 발진주파수(fp)를 단자(15)로 출력한다.Therefore, when the switch SWA is turned off, the high frequency modulation integrated circuit 1 inputs the low channel resonant frequency to the terminal 9 in the IC resonant circuit 5 to receive the oscillation frequency fp of the low channel. Output to terminal 15.
또한, 상기 고주파 변조용 집적회로(1)는 스위치(SWA)가 온될 때 LC공진회로(5)에서 공진한 하이 채널의 공진주파수를 단자(11)로 입력하여 상기 하이채널의 발진 주파수(fp)를 단자(15)로 출력한다.In addition, the high frequency modulation integrated circuit 1 inputs the resonant frequency of the high channel resonated by the LC resonance circuit 5 to the terminal 11 when the switch SWA is turned on, and thus the oscillation frequency fp of the high channel. Is output to the terminal 15.
이상과 같이 본 고안은 스위치와 LC공진회로를 이용하여 상기 스위치의 스위칭에 따라 복수개의 공진 주파수를 발생시킬 수 있으며 고가의 쏘 레조네이터를 대체할 수 이어 원가를 절감할 수 있는 효과가 있게 된다.As described above, the present invention can generate a plurality of resonant frequencies according to the switching of the switch using a switch and an LC resonant circuit, and can replace an expensive saw resonator, thereby reducing the cost.
한편, 본 고안은 상기한 일 실시예에 한정되지 않으며 제2도에서 에어코일(L2)의 후단에 동일구성의 에어코일 및 스위치를 추가로 설치하여 채널의 수를 증가시킬 수 있음은 이 분야에 종사하는 통상의 지식을 가진자라면 자명한 것이다.On the other hand, the present invention is not limited to the above-described embodiment, and in FIG. 2 , the number of channels can be increased by additionally installing air coils and switches of the same configuration at the rear of the air coil L 2 . If you have ordinary knowledge to engage in, it is obvious.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930007383U KR950002558Y1 (en) | 1993-05-04 | 1993-05-04 | Variable oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930007383U KR950002558Y1 (en) | 1993-05-04 | 1993-05-04 | Variable oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR940027708U KR940027708U (en) | 1994-12-10 |
| KR950002558Y1 true KR950002558Y1 (en) | 1995-04-08 |
Family
ID=19354732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019930007383U KR950002558Y1 (en) | 1993-05-04 | 1993-05-04 | Variable oscillator |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR950002558Y1 (en) |
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1993
- 1993-05-04 KR KR2019930007383U patent/KR950002558Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR940027708U (en) | 1994-12-10 |
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