KR840001572Y1 - Cross talk preventing circuit by selecting switch - Google Patents

Cross talk preventing circuit by selecting switch Download PDF

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KR840001572Y1
KR840001572Y1 KR2019820008655U KR820008655U KR840001572Y1 KR 840001572 Y1 KR840001572 Y1 KR 840001572Y1 KR 2019820008655 U KR2019820008655 U KR 2019820008655U KR 820008655 U KR820008655 U KR 820008655U KR 840001572 Y1 KR840001572 Y1 KR 840001572Y1
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switch
function
resistor
selector
fet
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KR2019820008655U
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KR840003502U (en
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조기제
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주식회사금성사
허신구
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1646—Circuits adapted for the reception of stereophonic signals

Abstract

내용 없음.No content.

Description

기능 선택시의 누화 방지회로Crosstalk prevention circuit at the time of function selection

제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.

제2도 (a)는 AM 기능 선택시의 스위치 접점 상태도. (b)는 FM 기능 선택시의 스위치 접점 상태도. (c)는 PHONO 기능 선택시의 스위치 접점 상태도. (d)는 TAPE 기능 선택시의 스위치 접점 상태도. (e)는 AUX 기능 선택시의 스위치 접점 상태도.2A is a switch contact state diagram when the AM function is selected. (b) shows the state of switch contact when the FM function is selected. (c) is a switch contact state diagram when the PHONO function is selected. (d) shows the state of switch contact when TAPE function is selected. (e) shows the state of switch contact when AUX function is selected.

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

1 : AM 중간 주파증폭 출력단 2 : FM 중간 주파 증폭 출력단1: AM intermediate frequency amplification output stage 2: FM intermediate frequency amplification output stage

3 : PHONO 출력단 4 : TAPE 출력단3: PHONO output terminal 4: TAPE output terminal

5 : AUX 출력단 6 : MPX 회로부5: AUX output terminal 6: MPX circuit

7, 8 : 로우 패스필터(Low Pass Filter) 9 : 우채널토운 콘트롤 부7, 8: Low pass filter 9: Right channel ton control unit

10 : 좌채널 토운 콘트롤부 11 : 누화방지부10: left channel ton control unit 11: crosstalk prevention unit

SW1-SW5: 기능 선택 스위치SW 1 -SW 5 : Function selector switch

본 고안은 스테레오 수신기 등에 착설된 기능 선택스위치(Function Selector)에 의하여 다양한 기능(AM, FM, PHONO, TAPE, AUX 등)을 선택하는 경우에 있어서 통상의 회로수(2회로 2 접점)를 가진 기능 선택스위치 사용으로도 각 기능간에 발생되는 누화(Cross talk) 현상을 방지할 수 있도록한 기능 선택 시의 누화방지 회로에 관한 것이다.The present invention has a function having a normal number of circuits (two circuits and two contacts) when selecting various functions (AM, FM, PHONO, TAPE, AUX, etc.) by a function selector installed in a stereo receiver. The present invention relates to a circuit for preventing crosstalk at the time of selecting a function to prevent cross talk occurring between functions even by using a selection switch.

종래에는 이러한 문제점을 개선 코자 각 기능 선택스위치의 회로수(4회로 2접점등)를 과다하게 설정 사용하는 경우 또는 기기의 의장 및 구조상의 난해점 등으로 통상의 스위치 회로수(2회로 2접점)를 이용한 기능 선택 스위치를 사용하여 MPX 출력단을 직접 토운 콘트롤 입력단에 연결 시키는 경우가 주로 사용되어 왔었다.In order to solve such a problem, a conventional switch circuit number (two circuits and two contact points) is used when the number of circuits (four circuits or two contacts, etc.) of each function selection switch is set excessively or when the equipment design and structural difficulties are solved. It has been commonly used to connect the MPX output directly to the ton control input using the function selection switch.

그러나 전자의 경우에는 기기의 의장 및 구조 개발상의 제한성과 작업능률을 저하시키는 문제점이 야기 되었으며, 후자의 경우에는 MPX 출력단과 토운큰트롤 입력단의 임피이던스 변화등으로 인하여 타 기능 선택시의 입력 감도 저하등으로 제품의 성능을 저하시키는 문제점이 야기 되었다.However, in the former case, there was a problem in the design and structure development of the device and the problem of lowering the work efficiency.In the latter case, the input sensitivity was lowered when selecting the other function due to the change in the impedance of the MPX output stage and the token troll input stage. This caused a problem of degrading the performance of the product.

본 고안은 이러한 점을 감안하여 전계효과 트랜지스터(FET)등의 소자 특성을 이용하여 통상의 스위치를 사용하고도 각 기능간의 누화 현상을 방지시킬 수 있도록 안출한 것으로서 이를 첨부한 도면에 의하여 상세히 설명하면 다음과 같다.The present invention has been devised to prevent crosstalk between the functions even when using ordinary switches by using device characteristics such as field effect transistors (FETs). As follows.

제1도, 제2도에서와 같이 AM중간 주파 증폭출력단(1)을 AM기능 선택 스위치(SW1)의 접점(b1)에 연결하고, FM 중간주파 증폭 출력단(2)을 FM 기능선택 스위치(SW2)의 접점(d1)에 연결 시키고, 스위치(SW1), (SW2)의 접점(a1), (e1)에 각각 다이오드(D2, D1)를 접속하여 공접시키고, 그의 접속점(p)에 각각 저항(R5), (R6)을 통하여 전계 효과 트랜지스터(FET1), (FET2)의 게이트 측(G1), (G2)에 접속하고, 게이트측(G1), (G2)과 저항(R5), (R6) 사이에 각각 저항(R7), (R8)을 통하여 부(-) 직류전원을 연결시킨다.As shown in Figs. 1 and 2, the AM intermediate frequency amplification output stage 1 is connected to the contact point b 1 of the AM function selection switch SW 1 , and the FM intermediate frequency amplification output stage 2 is connected to the FM function selection switch. Connect to contact (d 1 ) of (SW 2 ), and connect diode (D 2 , D 1 ) to contacts (a 1 ) and (e 1 ) of switch (SW 1 ), (SW 2 ) And its connection point p are connected to the gate side G 1 and G 2 of the field effect transistors FET 1 and FET 2 via resistors R 5 and R 6 , respectively, Connect negative DC power through resistors R 7 and R 8 between (G 1 ), (G 2 ) and resistors (R 5 ) and (R 6 ), respectively.

스위치(SW1)의 접점(b2)과 공접된 스위치(SW2)의 접점(d2)에 MPX 회로부 ( 6)의 입력단을 연결하고, 그의 출력단을 각각 로우패 스필터(7), (8), 저항 (R1), (R2), 콘덴서(C1), (C2)를 통하여 전계 효과 트랜지스터(FET1), (FET2)의 소우스측(S1), (S2)에 접속하고 , 각각의 드레인측(Dr1), (Dr2)은 스위치(SW3), (SW4), (SW5)의 접점(f1)(h1)(j1) 및 (e1)(g1)(I1)과 공접하여 각각 토운 콘트롤 부(9)(10)에 접속하고, 스위치(SW3), (SW4), (SW5)의 접점(e3, f3), (g3, h3), (I3, J3)을 접지시킨다.The input terminal of the MPX circuit part 6 is connected to the contact point d 2 of the switch SW 2 , which is in contact with the contact point b 2 of the switch SW 1 , and the output terminal thereof is connected to the low pass filter 7, ( 8) Source side (S 1 ), (S 2 ) of field effect transistors (FET 1 ), (FET 2 ) through resistors (R 1 ), (R 2 ), capacitors (C 1 ), (C 2 ) ), And each of the drain side Dr 1 , Dr 2 is connected to the switches SW 3 , SW 4 , SW 5 , and contacts f 1 , h 1 , j 1 , and ( e 1 ) (g 1 ) (I 1 ) and connected to the tow control section 9, 10, respectively, and the contacts e 3 , f of the switches SW 3 , SW 4 , and SW 5 . 3 ), (g 3 , h 3 ), (I 3 , J 3 ) are grounded.

미설명부호 +B는 정(+)직류전원이고, -B는 부(-)직류전원이고, R3, R4는 저항이고, C1, C2는 전계효과 트랜지스터 오동작 방지용 콘덴서이고, L, R는 좌, 우측 채널 표시이다. 이와 같이 구성된 본 고안의 작용효과를 설명하면 다음과 같다.Unexplained sign + B is a positive (+) DC power supply, -B is a negative (-) DC power supply, R 3 , R 4 is a resistor, C 1 , C 2 is a capacitor for preventing the field effect transistor malfunction, L, R is the left and right channel display. Referring to the effect of the present invention configured as described above are as follows.

FM 방송 청취를 위하여 사용자에 의하여 스위치(SW2)가 선택된 경우에는 제2도(b)에서와 같이 기능 선택 스위치(SW2)만 “온”상태로 되고, 타기능 선택 스위치는 전부 “오프”상태가 된다.When the switch SW 2 is selected by the user to listen to the FM broadcast, only the function selection switch SW 2 is turned “on” as shown in FIG. 2 (b), and all other function selection switches are “off”. It becomes a state.

이 상태가 되면 접점(C1)과 (C2),(d1)과 (d2)가 접속되어 제1도에서와 같이 FM 중간주파 증폭출력단(2)이 MPX 회로(6)에 연결되고, 스위치(SW2)의 접점 (C2)(C1)에 정(+) 직류전압이 공급되어 이 전압은 다이오드(D1) 및 각각 저항(R5), (R6)을 통하여 전계효과 트랜지스터(FET1), (FET2)의 게이트측(G1), (G2)에 인가되지만 이 경우에 게이트측 (G1), (G2)에는 각각 저항(R7), (R8)을 통하여 부(-) 직류전압이 인가되고 있는 상태이므로 저항(R5), (R7)과 저항(R6), (R8)에 의해 전압 강하된 정(+), 부(-)의 직류전압이 합성되어 게이트측(G1), (G2)에는 정(+)의 직류전압이 인가(R7〉R5〉 및 R8〉 R6로 설정)되므로 이로인하여 전계효과 트랜지스터(FET1), (FET2가 각각 도통 상태가 되어 MPX 회로부(6)를 통하여 FM 스테레오 출력 신호가 토운 콘트롤 부(9) (10)의 좌, 우 채널에 입력된다. 한편, AM 방송청취시는 제2도(a)에서와 같이 AM 기능선택 스위치(SW1)만 “온” 상태로 되고, 타기능 선택 스위치는 전부 “오프” 상태가 된다.In this state, the contacts C 1 and C 2 , d 1 and d 2 are connected so that the FM intermediate frequency amplifying output stage 2 is connected to the MPX circuit 6 as shown in FIG. , Positive (+) DC voltage is supplied to the contact point (C 2 ) (C 1 ) of the switch (SW 2 ), and this voltage is applied through the diode (D 1 ) and the resistors (R 5 ) and (R 6 ) respectively. It is applied to the gate sides G 1 and G 2 of the transistors FET 1 and FET 2 , but in this case, the resistors R 7 and R 8 are applied to the gate sides G 1 and G 2 , respectively. Negative (+) and negative (-) voltage drops by resistors (R 5 ), (R 7 ) and resistors (R 6 ), (R 8 ) DC voltages are synthesized and positive (+) DC voltages are applied to the gate side (G 1 ) and (G 2 ) (R 7 > R 5 > and R 8 > R 6 ). of the FET 1), (the FET 2 is rendered conductive each MPX circuit 6, an FM stereo output signal Featherstone through the control section 9, 10 , Is input to the right channel. On the other hand, AM broadcasts when only the second degree, as shown in (a) AM function selection switch (SW 1) and to the "on" state, the other function selection switch is all "off" state do.

이 상태가 되면 접점(a1)과 (a2), (b1)과 (b2)가 접속되어 AM 중간주파 증폭출력단(1)이 MPX회로 (6)에 연결되고, 스위치(SW1)의 접점(a1)(a2)에 정(+)의 직류전압이 공급되어 이 전압은 다이오드(D2) 및 각각 저항(R5), (R6)을 통하여 상술한 바와 같이 FM 기능 선택 경우와 동일하게 회로가 동작하여 게이트측(G1), (G2)에 인가되므로 전계효과 트랜지스터(FET1), (FET2)가 각각 도통 상태가 되어 MPX 회로부(6)를 통하여 AM 출력신호가 토운 콘트롤부(9)(10)의 좌, 우측 채널에 입력된다.In this state, the contacts (a 1 ) and (a 2 ), (b 1 ) and (b 2 ) are connected so that the AM intermediate frequency amplification output stage 1 is connected to the MPX circuit 6, and the switch SW 1 Positive (+) DC voltage is supplied to the contacts (a 1 ) and (a 2 ) of which are selected via the diode (D 2 ) and resistors (R 5 ) and (R 6 ), respectively, as described above. As in the case, the circuit operates and is applied to the gate side G 1 and G 2 so that the field effect transistors FET 1 and FET 2 are in a conductive state, respectively, and the AM output signal is transmitted through the MPX circuit unit 6. Is input to the left and right channels of the ton control unit 9 (10).

한편 AM 및 FM 기능을 제외한 타기능(PHONO, TAPE, AUX 등)이 선택된 경우에는 제2도 (c)(d)(e)에서와 같이 각각 스위치(SW3), (SW4), (SW5)가 “온”상태가 되고, 각각의 경우에 저항(R7), (R8)을 통하여 부(-) 직류전압이 인가되므로 전계효과 트랜지스터(FET1)(FET2)는 부도통 상태가 되어, 토운 콘트롤부(9)(10) 측에서 보았을때 AM, FM 출력단의 임피이던스는 개방 상태와 같이 무한대가 되므로서 이로 인하여 토운, 콘트롤부(9)(10)의 입력 임피이던스는 변화하지 않으므로 타기능의 입력 감도가 저하되지 않음은 물론 고주파)특성이 나빠지지 않는 타기능 출력 신호를 토운, 콘트롤 부(9)(10)의 좌, 우측채널에 입력시킬수가 있는 것이다.On the other hand, when other functions (PHONO, TAPE, AUX, etc.) except for AM and FM functions are selected, switches SW 3 , SW 4 and SW, respectively, as shown in FIG. 2 (c) (d) (e). 5 ) is turned on, and in each case, a negative DC voltage is applied through the resistors R 7 and R 8 so that the field effect transistors FET 1 and FET 2 are in a non-conducting state. Since the impedance of the AM and FM output stages is infinity as shown in the open state when viewed from the tow control unit 9 (10) side, the input impedance of the ton control unit 9 (10) does not change. The input function of the other function is not deteriorated, but the other function output signal whose high frequency) characteristic is not degraded can be input to the left and right channels of the control unit 9 (10).

이상에서와 같이 동작하는 본 고안은 통상의 과다한 회로수(4회로 2접점등)의 스위치를 사용하지 않고도 선택된 기능 스위치 이외의 타기능 선택 스위치를 접지시키므로서 각 기능 간의 누화(Cross talk) 현상을 방지할 수가 있는 것이다.The present invention, which operates as described above, eliminates cross talk between functions by grounding other function selection switches other than the selected function switch without using an ordinary excessive number of circuits (four circuits and two contact lights). It can be prevented.

Claims (2)

통상의 기능 선택스위치(Function Selector) 사용에 있어서, AM, FM 선택 스위치(SW1), (SW2)와 타기능 선택스위치(SW3-SW5) 사이에 AM, FM 선택 스위치 (SW1), (SW2)에 제어되어 AM, FM 선택 스위치(SW1), (SW2)와 타기능 선택스위 치(SW3-SW5)를 회로적으로 차단, 도통시키는 누화방지부(11)를 연결구성하여 각 기능 간의 누화(Crosstalk) 현상을 방지토록 함을 특징으로한 기능선택시의 누화방지 회로.In normal function selector use, between AM and FM selector switches (SW 1 ), (SW 2 ) and other function selector switches (SW 3 to SW 5 ), AM and FM selector switches (SW 1 ). , it is controlled to (SW 2), AM, an FM selector switch (SW 1), (SW 2) and the other function selection switch (SW 3 -SW 5) the circuit blocks typically, conductive hwabang press portion 11 for Crosstalk prevention circuit at the time of function selection, characterized in that the connection configuration prevents crosstalk between each function. 제1항에 있어서, 누화방지부(11)는 전계효과 트랜지스터(FET1), (FET2)의 소오스측(S1), (S2)은 저항 (R1, R3), 콘덴서 (C1), 로우패스필터(7)와, 저항(R2), (R4) 콘덴서(C2), 로우패스필터(8)를 거쳐 MPX회로부(6)의 출력단에 각각 접속시키고, 게이트측(G1)은 저항(R5), 다이오드(D1)를 거쳐 FM 선택스위치(SW2)와 저항(R7)을 거쳐부(-) 직류전원측에 각각 접속하고, 게이트측(G2)은 저항(R6), 다이오드(D2)를 거쳐 AM 선택 스위치(SW1)와 저항(R8)을 거쳐 부(-) 직류전원 측에 각각 접속하고, 드레인측(D1), (D2)은 타기능 스위치(SW3-SW5)와 공접하여 토운콘트롤부(9)(10)에 각각 접속시키어 구성 됨을 특징으로한 기능 선택시의 누화 방지회로.The crosstalk preventing unit 11 is a source side transistors (FET 1 ), (FET 2 ) of the source side (S 1 ), (S 2 ) is a resistor (R 1 , R 3 ), capacitor (C) 1 ), the low pass filter 7, the resistors R 2 , (R 4 ) condenser C 2 , and the low pass filter 8 are connected to the output terminal of the MPX circuit unit 6, respectively. G 1 ) is connected to the DC power supply side via a resistor (R 5 ), a diode (D 1 ) via an FM select switch (SW 2 ) and a resistor (R 7 ), and the gate side (G 2 ) Via the resistor R 6 and the diode D 2 , connect to the negative DC power supply side via the AM selector switch SW 1 and the resistor R 8 , respectively, and the drain side D 1 and D 2. ) Is a crosstalk prevention circuit at the time of function selection, characterized in that it is configured to be connected to the other control switch (SW 3 -SW 5 ) to the toun control unit (9) (10), respectively.
KR2019820008655U 1982-11-02 1982-11-02 Cross talk preventing circuit by selecting switch KR840001572Y1 (en)

Priority Applications (1)

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KR2019820008655U KR840001572Y1 (en) 1982-11-02 1982-11-02 Cross talk preventing circuit by selecting switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019820008655U KR840001572Y1 (en) 1982-11-02 1982-11-02 Cross talk preventing circuit by selecting switch

Publications (2)

Publication Number Publication Date
KR840003502U KR840003502U (en) 1984-07-25
KR840001572Y1 true KR840001572Y1 (en) 1984-08-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019820008655U KR840001572Y1 (en) 1982-11-02 1982-11-02 Cross talk preventing circuit by selecting switch

Country Status (1)

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Publication number Publication date
KR840003502U (en) 1984-07-25

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