KR890008441Y1 - Automatic tuning circuit of radio - Google Patents

Automatic tuning circuit of radio Download PDF

Info

Publication number
KR890008441Y1
KR890008441Y1 KR2019860017355U KR860017355U KR890008441Y1 KR 890008441 Y1 KR890008441 Y1 KR 890008441Y1 KR 2019860017355 U KR2019860017355 U KR 2019860017355U KR 860017355 U KR860017355 U KR 860017355U KR 890008441 Y1 KR890008441 Y1 KR 890008441Y1
Authority
KR
South Korea
Prior art keywords
output terminal
tuner
transistor
terminal
radio
Prior art date
Application number
KR2019860017355U
Other languages
Korean (ko)
Other versions
KR880010845U (en
Inventor
고정환
Original Assignee
삼성전자주식회사
한형수
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 삼성전자주식회사, 한형수 filed Critical 삼성전자주식회사
Priority to KR2019860017355U priority Critical patent/KR890008441Y1/en
Publication of KR880010845U publication Critical patent/KR880010845U/en
Application granted granted Critical
Publication of KR890008441Y1 publication Critical patent/KR890008441Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
    • H03J5/244—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

내용 없음.No content.

Description

라디오의 자동 튜닝회로Radio's Automatic Tuning Circuit

첨부 도면은 본 고안의 회로도.The accompanying drawings are circuit diagrams of the present invention.

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

D1, D2: 다이오드 R1-R7: 저항D 1 , D 2 : diode R 1 -R 7 : resistance

VR1, VR2: 가변저항 OP1, OP2: OP앰프VR 1 , VR 2 : Variable resistance OP 1 , OP 2 : OP amplifier

TR1, TR2: 트랜지스터 NR : 노어게이트TR 1 , TR 2 : Transistor NR: NORGATE

본 고안은 AM/FM겸용 라디오에 있어서, 별도의 AM 또는 FM모우드 선택스위치의 조작없이 튜닝조작시 자동으로 동조되는 방송에 따라 AM 또는 FM 수신모우드로 절환되도록 한 라디오의 자동튜닝회로에 대한 것이다.The present invention relates to an automatic tuning circuit of a radio in which an AM / FM combined radio is switched to an AM or FM receiving mode according to a broadcast automatically tuned during a tuning operation without a separate AM or FM mode selection switch.

종래의 AM/FM겸용 라디오는 AM/FM모우드 선택스위치에 의해 수신밴드를 선택한 후 튜닝조작에 의해 선택된 모우드의 방송만을 수신하도록 되어 있기 때문에 각 밴드의 원하는 방송을 수신하기 위한 절환조작이 번거로운 폐단이 있었다.In the conventional AM / FM radio, since the AM / FM mode selection switch selects a reception band and receives only the broadcast of the mode selected by the tuning operation, it is cumbersome to switch between receiving the desired broadcast of each band. there was.

본 고안은 이와같은 폐단을 해결하기 위한 것으로 별도의 밴드선택스위치의 조작없이 AM 또는 FM 튜너의 튜닝 LED 제어단자전압을 이용하여 튜닝시 각 밴드에서 동조되는 방송에 따라 AM 또는 FM 밴드로 자동절환되도록 안출한 것으로서, 이하 본 고안의 구성, 작용 및 효과를 첨부도면에 의해 상세히 설명한다.The present invention is intended to solve this problem and to automatically switch to AM or FM band according to the broadcasting tuned in each band when tuning using the tuning LED control terminal voltage of AM or FM tuner without the operation of a separate band selection switch. As devised, the configuration, operation and effect of the present invention will be described in detail by the accompanying drawings.

FM 및 AM 튜너 (1)(2)의 각 출력단(out1)(out2)에 멀티플렉서회로(3)로 연결되는 AM/FM겸용 라디오에 있어서, 통상의 FM 및 AM 튜너 (1)(2)의 튜닝 LED제어단자 (tv1)(tv2)를 각각 다이오드(D1)(D2)를 통해 OP앰프(OP1)(OP2)의 각 비반전입력단(+)(+')에 연결하고 그 반전입력단(-)(-')를 각각 기준전압설정용 가변저항(VR1)(VR2)을 통해 접지시킴과 동시에 각 저항(R3)(R4)을 통해 B+전원에 공접시키며, 상기의 OP앰프(OP1)의 출력단을 노이게이트(NR)의 일측입력단에 연결함과 동시에 저항(R3)을 통해 콜렉터가 FM튜너(1)의 출력단(out1)에 연결된 트랜지스터(TR1)의 베이스에 연결하고 상기의 OP앰프(OP2)의 출력단을 상기의 노어게이트(NR)의 타측입력단에 연결함과 동시에 저항(R6)을 통해 콜렉터가 AM 튜너(2)의 출력단(out2)에 연결된 트랜지스터(TR1)의 베이스에 연결하며, 상기의 노어게이트(NR)의 출력단을 저항(R7)을 통해 상기의 트랜지스터(TR2)의 베이스에 연결한 것으로서 미설명 부호중 ANT는 FM방송수신안테나, R1-R2는 저항, LD1, LD2는 FM 및 AM 튜닝표시용 LED, L, R은 멀티플렉서회로(3)의 좌, 우 채널을 출력단이다.In the AM / FM combined radio connected to each output terminal (out 1 ) (out 2 ) of the FM and AM tuner (1) (2) by a multiplexer circuit (3), a conventional FM and AM tuner (1) (2) tuning LED control terminal (tv 1) (tv 2), each diode (D 1) OP amplifier through (D 2) (OP 1) (OP 2) connected to each non-inverting input terminal (+) (+ ') of Ground the inverting input terminal (-) (-') through the variable resistor (VR 1 ) (VR 2 ) for setting the reference voltage, respectively, and at the same time, share the B + power supply through each resistor (R 3 ) (R 4 ). The output terminal of the OP amplifier OP 1 is connected to one input terminal of the noise gate NR, and the collector is connected to the output terminal out 1 of the FM tuner 1 through a resistor R 3 . TR 1 ) and the output terminal of the OP amplifier OP 2 to the other input terminal of the NOR gate NR, and the collector is connected to the output terminal of the AM tuner 2 through the resistor R 6 . open the base of the transistor (TR 1) is connected to the (out 2) And, the output terminal of the NOR-gate (NR) of the resistor (R 7) as a connection to the base of the transistor (TR 2) in the ANT through the reference numeral of the FM broadcast receiving antennas, R 1 -R 2 is resisted , LD 1 and LD 2 are the LEDs for FM and AM tuning display, and L and R are the left and right channels of the multiplexer circuit 3 as output terminals.

이와같이 구성된 본 고안의 회로동작상태는 다음과 같다.The circuit operation state of the present invention configured as described above is as follows.

먼저, 연동의 방송선국용 바리콘을 돌려 수신방송을 동조시키는 과정에 있어서, FM 튜너(1)나 AM 튜너(2)가 모두 동조되지 않았을 경우, FM튜닝 LED제어단자(tv1) 및 AM 튜닝 LED 제어단자(tv2)의 단자전압이 모두 '하이'(high) 레벨상태가 된다.First, when the FM tuner 1 or the AM tuner 2 is not tuned in the process of turning the interlocking broadcast barricades to tune the received broadcast, the FM tuning LED control terminal tv 1 and the AM tuning LED All terminal voltages of the control terminal tv 2 are in a high level state.

따라서, 각 LED(LD1)(LD2)는 모두 '오프'되어 소등되는 한편, 다이오드(D1)(D2)가 도통되며, 이때 가 OP앰프(OP1)(OP2)의 비반전입력단(+)(+')의 전압레벨이 저항(R3)(R4) 및 가변저항(VR1)(VR2)에 의해 기준전압이 인가되는 반전입력단(-)(-')보다 높게 되어 각 OP앰프(OP1)(OP2)의 출력은 '하이'레벨로 된다. 따라서 각 트랜지스터(TR1)(TR2)가 모두 도통되고, 이에의해 각 튜너(1)(2)의 출력단(out1)(out2)이 접지로 연결되므로 FM 및 AM 튜너 (1)(2)의 출력이 멀티플렉시회로(3)로 입력되지 못하고 '뮤팅(muting)' 상태가 된다.Accordingly, each LED (LD 1 ) (LD 2 ) is all turned off and turned off, while the diode (D 1 ) (D 2 ) is turned on, where is the non-inverting of the OP amplifier (OP 1 ) (OP 2 ) The voltage level of the input terminal (+) (+ ') is higher than the inverting input terminal (-) (-') to which the reference voltage is applied by the resistors (R 3 ) (R 4 ) and the variable resistors (VR 1 ) (VR 2 ). Thus, the output of each OP amplifier OP 1 and OP 2 is at the 'high' level. Therefore, the transistors TR 1 and TR 2 are both turned on, so that the output terminals 1 and 2 of the tuners 1 and 2 are connected to ground, so that the FM and AM tuners 1 and 2 are connected. ) Is not input to the multiplexing circuit (3) and becomes a 'muting' state.

둘째, 동조과정에서 먼저 AM방송이 잡히는 경우, AM튜너(2)의 제어단자(tv2)가 '로우'레벨로 되면서 AM튜닝표시용 LED(LD2)가 '온'되며, 이때 OP앰프(OP2)의 단자(+')전압이 단자(-')의 기준전압레벨보다 낮게 되므로 이 OP앰프(OP2)의 출력은 '로우'레벨로 되어 트랜지스터(TR2)가 '커트오프'된다. 이때 노어게이트(NR)의 출력 역시 '로우'레벨로 된다.Second, when the AM broadcast is first caught in the tuning process, the control terminal tv 2 of the AM tuner 2 is set at the 'low' level, and the AM tuning display LED (LD 2 ) is 'on'. Since the voltage of the terminal (+ ') of OP 2 is lower than the reference voltage level of the terminal (-'), the output of this OP amplifier (OP 2 ) becomes 'low' level so that the transistor TR2 is 'cut off'. At this time, the output of the NOR gate NR also becomes 'low' level.

따라서 AM 튜너(2)의 출력단(out2)을 통해 출력되는 AM방송신호가 멀티플렉시회로(3)로 입력되어 처리됨으로써 AM방송을 청취할 수 있게 되는 것으로서, 즉 AM방송이 있는 주파수에서는 별도의 밴드선택스위치의 조작없이 자동으로 AM수신모두드상태에 있게 된다.Accordingly, the AM broadcast signal output through the output terminal (out 2 ) of the AM tuner 2 is input to the multiplex circuit 3 to be processed so that the AM broadcast can be listened to. The AM reception mode is automatically activated without the band select switch being operated.

셋째, 동조과정에서 FM방송이 잡히는 경우, 이 경우 FM튜너(1)의 제어단자(tv1)가 '로우'레벨로 되어 FM튜닝표시용 LED(LD1)가 '온'되는 한편 AM튜너(2)의 제어단자(tv2)는 '하이'레벨로 된다. 따라서 OP앰프(OP1)의 출력은 '로우'레벨로 되고 OP앰프(OP1)의 출력은 '하이'레벨상태로 되어 트랜지스터(TR1)가 '커트오프'되고 트랜지스터(TR2)가 도통된다. 이때 노어게이트(NR)의 출력 역시 '로우'레벨상태이다.Third, when FM broadcasting is caught in the tuning process, in this case, the control terminal tv 1 of the FM tuner 1 is at the 'low' level, and the FM tuning LED (LD 1 ) is 'on' while the AM tuner ( The control terminal tv 2 of 2 ) becomes 'high' level. Therefore, the output of the OP amplifier OP 1 is at the 'low' level, the output of the OP amplifier OP 1 is at the 'high' level, so that the transistor TR 1 is 'cut off' and the transistor TR 2 is conducting. do. At this time, the output of the NOR gate NR is also at the 'low' level.

따라서 FM 튜너(1)의 출력단(out1)을 통해 출력되는 FM방송신호가 멀티플렉서회로(3)로 입력되어 FM방송을 청취할 수 있게 되는 것으로서, FM방송이 있는 주파수에서는 자동으로 FM수신모우드로 절환되는 것이다.Therefore, the FM broadcast signal output through the output terminal (out 1 ) of the FM tuner (1) is input to the multiplexer circuit (3) to be able to listen to the FM broadcast, the FM broadcast frequency automatically at the FM reception mode It is switched.

넷째, 동조과정에서 연동바리콘의 위치가 FM방송과 AM방송이 모두 잡히는 곳에 있을 경우, 즉 FM 및 AM방송이 동시에 동조될 경우, 각 튜너(1)(2)의 튜닝LED제어단자(tv1)(tv2)가 모두 '로우'레벨로 되어 각 OP앰프(OP1)(OP2)의 출력도 모두 '로우'레벨로 된다.Fourth, if the position of the interlocking barricon in the tuning process where both FM and AM broadcasts are caught, that is, when the FM and AM broadcasts are synchronized at the same time, the tuning LED control terminal (tv 1 ) of each tuner (1) (2) (tv 2 ) are all at the 'low' level, and the output of each OP amplifier (OP 1 ) (OP 2 ) is also at the 'low' level.

따라서 트랜지스터(TR1)는 '커트오프'되나 이때 노어게이트(NR)의 양측 입력단이 모두 '로우'레벨로 되어 그 출력단이 '하이'레벨로 반전되므로 트랜지스터(TR2)는 베이스전압을 공급받게 되어 도통된다.Therefore, the transistor TR 1 is 'cut off', but since both input terminals of the NOR gate NR are at the 'low' level, and the output terminal is inverted to the 'high' level, the transistor TR 2 is supplied with the base voltage. Become conductive.

그러므로 AM튜너(2)의 출력이 이 트랜지스터(TR2)에 의해 뮤팅상태로 되어, 결국 FM방송을 청취할 수 있는 FM수신모우드 상태에 있게 되는 것으로서, 즉 FM 및 AM방송이 동시에 동조될 경우에는 FM방송만을 청취할 수 있다.Therefore, the output of the AM tuner 2 is muted by this transistor TR 2 , and thus is in the FM receiving mode to listen to the FM broadcast, that is, when the FM and AM broadcasts are simultaneously tuned. Only FM broadcasts can be heard.

이상과 같이 본 고안은 튜닝시 동조되는 방송에 따라 AM 또는 FM수신밴드가 자동절환됨으로써, 별도의 밴드선택스위치의 조작이 불필요하여 사용에 편리함은 물론 제품의 고급화를 이룩한 유용한 고안이다.As described above, the present invention is an AM or FM receiving band is automatically switched according to the tuning tuned during the tuning, it is a useful design that is convenient to use as well as high-quality products without the need to operate a separate band selection switch.

Claims (1)

AM/FM겸용 라디오에 있어서, 통상의 FM 및 AM 튜너(1)(2)의 튜닝 LED 제어단자 (tv1)(tv2)를 각각 다이오드(D1)(D2)를 통해 OP앰프(OP1)(OP2)의 각 비반전입력단(+)(+')에 연결하고, 그 반전입력단(-)(-')를 각각 기준전압설정을 가변저항(VR1)(R2)을 통해 접지시킴과 동시에 각 저항(R3)(R4)을 통해 B+전원에 공접시키며, 상기의 OP앰프(OP1)의 출력단을 노어게이트(NR)의 일측입력단에 연결함 동시에 저항(R5)을 통해 콜렉터가 FM튜너(1)의 출력단(out1)에 연결된 트랜지스터(TR1)의 베이스에 연결하고, 상기의 OP앰프(OP2)의 출력단을 상기의 노어게이트(NR)의 타측입력단에 연결함과 동시에 저항(R6)을 통해 콜렉터가 AM튜너(2)의 출력단(out2)에 연결된 트랜지스터(TR1)의 베이스에 연결하며, 상기의 노어게이트(NR)의 출력단을 저항(R7)을 통해 상기의 트랜지스터(TR2)의 베이스에 연결한 구성을 특징으로 하는 라디오 자동튜닝회로.In the AM / FM combined radio, the tuning LED control terminals tv 1 and tv 2 of the conventional FM and AM tuners 1 and 2 are respectively connected via the diodes D 1 and D 2 . 1 ) Connect each non-inverting input terminal (+) (+ ') of (OP 2 ), and set the reference voltage of each inverting input terminal (-) (-') through the variable resistor (VR 1 ) (R 2 ). at the same time as the ground Sikkim also sikimyeo through each resistor (R 3) (R 4) gongjeop the B + power supply, connected to the output terminal of the of the OP amplifier (OP 1) at one side input terminal of the NOR-gate (NR) at the same time resistance (R 5 The collector is connected to the base of the transistor TR 1 connected to the output terminal (out 1 ) of the FM tuner 1, and the output terminal of the OP amplifier OP 2 is connected to the other input terminal of the NOR gate NR. At the same time, the collector is connected to the base of the transistor TR 1 connected to the output terminal (out 2 ) of the AM tuner 2 through the resistor R 6 , and the output terminal of the NOR gate NR is connected to the resistor ( R 7 ) to the transistor ( TR 2 ) Radio autotuning circuit characterized by the configuration connected to the base.
KR2019860017355U 1986-11-07 1986-11-07 Automatic tuning circuit of radio KR890008441Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019860017355U KR890008441Y1 (en) 1986-11-07 1986-11-07 Automatic tuning circuit of radio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019860017355U KR890008441Y1 (en) 1986-11-07 1986-11-07 Automatic tuning circuit of radio

Publications (2)

Publication Number Publication Date
KR880010845U KR880010845U (en) 1988-07-28
KR890008441Y1 true KR890008441Y1 (en) 1989-11-25

Family

ID=19256900

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019860017355U KR890008441Y1 (en) 1986-11-07 1986-11-07 Automatic tuning circuit of radio

Country Status (1)

Country Link
KR (1) KR890008441Y1 (en)

Also Published As

Publication number Publication date
KR880010845U (en) 1988-07-28

Similar Documents

Publication Publication Date Title
KR890008441Y1 (en) Automatic tuning circuit of radio
GB1157674A (en) Monophonic-Stereophonic Automatic Switching and Demodulator Circuit
JPS6210456B2 (en)
GB1500123A (en) Controllable bandwidth if filter circuit for radio receivers
US6751449B1 (en) Circuit configuration for band changeover in high-frequency receivers
KR880003432Y1 (en) Receiving bund autoselection circuit for radio
KR890002373Y1 (en) Receiving antenna automatic selecting circuit of radio
KR900010358Y1 (en) Switching circuit for multi-lateral and stereo audio receiving apparatus
KR890009428Y1 (en) Automatic control system of fm receiver
KR890001044Y1 (en) Am and fm muting circuit
KR890005767Y1 (en) Multi-audio signal processing circuit
US3521204A (en) Electronically tuned pushbutton radio having station selecting comparison means
KR900003413Y1 (en) Automatic selection circuit for transportation information broadcasting
KR930006694Y1 (en) Bs tuner input cutout circuit
KR890001419Y1 (en) Automatic line selecting circuit
KR890009422Y1 (en) Automatic simulated stereo circuits
KR930006291Y1 (en) 2 input switching circuit
KR900005951Y1 (en) Automatic mode changing circuit for multi-sound television
KR860002771Y1 (en) Auto hi-blend control circuit
KR900006485Y1 (en) Automatic band with transfer circuit for fm broad casting
KR860001343B1 (en) Electronic band selector with muting function
KR900003703Y1 (en) Multi tuner appending system for picture in picture function
KR850002013Y1 (en) Am muting circuit
KR960004768Y1 (en) If band width switching of tunner
KR890002595B1 (en) Tuning circuits of broadcasting signal

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 19970829

Year of fee payment: 11

LAPS Lapse due to unpaid annual fee