KR910004460Y1 - Band selecting circuit for tuner - Google Patents

Band selecting circuit for tuner Download PDF

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Publication number
KR910004460Y1
KR910004460Y1 KR2019880021182U KR880021182U KR910004460Y1 KR 910004460 Y1 KR910004460 Y1 KR 910004460Y1 KR 2019880021182 U KR2019880021182 U KR 2019880021182U KR 880021182 U KR880021182 U KR 880021182U KR 910004460 Y1 KR910004460 Y1 KR 910004460Y1
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South Korea
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band
tuner
band selection
output
transistor
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KR2019880021182U
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Korean (ko)
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KR900013625U (en
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백동철
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삼성전자주식회사
안시환
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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03JTUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00Discontinuous 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
    • H03J5/24Discontinuous 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
    • H03J5/242Discontinuous 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
    • H03J5/244Discontinuous 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
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03JTUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

내용 없음.No content.

Description

튜우너의 밴드 선택회로Tuner Band Selection Circuit

제 1 도는 종래의 튜우너의 밴드 선택 블록도.1 is a band selection block diagram of a conventional tuner.

제 2 도는 종래의 튜우너의 밴드 선택회로.2 is a band selection circuit of a conventional tuner.

제 3 도는 본 고안의 회로도.3 is a circuit diagram of the present invention.

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

R1-R6: 저항 10 : 마이콤R 1 -R 6 : Resistance 10: Micom

C1-C3: 콘덴서 20 : 출력 드라이브단C 1 -C 3 : Condenser 20: Output drive stage

Q1-Q3: 트랜지스터 D1-D3: 다이오드Q 1 -Q 3 : Transistor D 1 -D 3 : Diode

D1-D3: 튜우너의 밴드 선택단자D 1 -D 3 : Tuner Band Selection Terminal

본 고안은 튜우너의 밴드를 선택함에 있어서, 마이콤에서 출력되는 2개의 밴드 선택 신호로 튜우너의 3개의 밴드를 선택할수 있도록한 튜우너의 밴드 선택회로에 관한 것이다.The present invention relates to a band selection circuit of a tuner in which three bands of the tuner can be selected using two band selection signals output from the microcomputer in selecting a band of the tuner.

종래의 튜우너의 밴드 선택회로에 대하여 살펴보면, 제 1 도에서 도시한 것은 마이콤(10)의 밴드 선택 신호 출력 단자가 2개인 경우로써 마이콤(10)에서 출력되는 2개의 밴드 선택 신호가 밴드 선택 집적회로(15 : LA7910)를 통하여 3개의 밴드 선택신호가 튜우너(25)에 인가되도록 하여 각각의 밴드(UHF), (VHF-L)(VHF-H)를 선택할 수 있도록 하였다.Referring to the band selection circuit of a conventional tuner, FIG. 1 shows a case in which two band selection signal output terminals of the microcomputer 10 are used, and two band selection signals output from the microcomputer 10 are selected by the band selection integrated circuit. Three band selection signals are applied to the tuner 25 through (15: LA7910) so that each band (UHF), (VHF-L) (VHF-H) can be selected.

또한 제 2 도에 도시한 것은 마이콤(10)의 밴드 선택 신호 출력단자가 3개일 경우로써 마이콤(10)의 밴드 선택 신호로써 트랜지스터(Q1)(Q2)(Q3)를 구동시켜 튜우너(25)에서 각각의 밴드(UHF), (VHF-L)(VHF-H)가 선택되도록 한 것이다.2 shows the case in which the band selection signal output terminals of the microcomputer 10 are three, and the tuner 25 drives the transistors Q1, Q2 and Q3 as the band selection signal of the microcomputer 10. Each band (UHF), (VHF-L) (VHF-H) is selected.

그러나 이와같은 종래의 튜우너의 밴드선택회로에서는 상기의 제 1 도와 같은 경우 마이콤(10)의 2개의 밴드 선택신호로 3개의 밴드를 선택할수 있도록 전용의 밴드 선택 집적회로(15 : LA7910)를 사용해야 하는관계로 밴드 선택 집적회로(15 : LA7910)의 결함이 발생될때 다른 집적회로(IC)로 대체 사용할수 없으므로 사용상에 많은 불편함이 있었으며, 상기 도시한 제 2 도와 같은 경우 마이콤(10)에서 직접 3개의 밴드 선택 신호가 출력되므로 회로 구성은 간단하나 통상의 마이콤에서는 2개의 신호가 출력되도록 되어 있던 것을 3개의 신호가 출력되게 하기 위해서는 마이콤의 내부 설계에 많은 어려움이 있는 것이었다.However, in the band selection circuit of the conventional tuner, in the case of the first diagram as described above, a dedicated band selection integrated circuit 15 LA7910 must be used so that three bands can be selected by the two band selection signals of the microcomputer 10. As a result, when the defect of the band selection integrated circuit 15 (LA7910) occurs, it cannot be replaced with another integrated circuit (IC), which causes inconvenience in use. The circuit configuration is simple because two band selection signals are output. However, in order to have three signals output from two signals output in a conventional micom, there are many difficulties in the internal design of the microcomputer.

따라서 본 고안은 종래의 이러한 결함을 감안하여 마이콤의 2개의 밴드 선택 신호로 출력드라이브단을 구동시켜 튜우너의 3개의 밴드(VHF), (VHF-L)(UHF)를 선택할수 있도록 한 것으로써 튜우너의 밴드를 선택함에 있어서 전용의 밴드 선택집적회로(15)를 사용치 않고 또한 마이콤 내부의 프로그램을 변경시키지 않고도 튜우너의 밴드를 선택할 수 있는 것이다.Therefore, in view of the above-mentioned deficiencies, the present invention drives the output drive stage with two band selection signals of the microcomputer to select three bands (VHF) and (VHF-L) (UHF) of the tuner. In selecting your band, the band of the tuner can be selected without using the dedicated band selection integrated circuit 15 and without changing the program inside the microcomputer.

이를 첨부 도면에 의해 상세히 설명하면 다음과 같다.This will be described in detail with reference to the accompanying drawings.

제 3 도는 본 고안의 회로도로써 튜우너의 밴드를 선택하기 위하여 2개의 밴드 선택 신호를 마이콤(10)에서 발생시켜 출력드라이브단(20)의 트랜지스터(Q1)(Q2)가 콘트롤 되도록하여 콘트롤된 상태에 따라 전원(B+)을 튜우너의 밴드 선택단자(V1)(V2)에 인가시켜 튜우너의 밴드(UHF), (VHF-L)가 선택되도록 하는 동시에 다이오드(D1)(D2)(D3)를 통하여 트랜지스터(Q3)가 콘트롤되도록 하여 콘트롤된 상태에 따라 전원(B+)을 튜우너의 밴드선택단자(V3)에 인가시켜 튜우너의 밴드(VHF-H)가 선택되도록 연결 구성한 것이다.FIG. 3 is a circuit diagram of the present invention, in which two band selection signals are generated at the microcomputer 10 to select a band of a tuner, so that the transistors Q 1 and Q 2 of the output drive stage 20 are controlled. According to the state, power (B +) is applied to the tuner's band select terminal (V 1 ) (V 2 ) so that the tuner's band (UHF) and (VHF-L) are selected and diode (D 1 ) (D 2 ) Transistor Q 3 is controlled through (D 3 ) so that power (B +) is applied to the tuner's band select terminal (V 3 ) according to the controlled state so that the tuner's band (VHF-H) is selected. will be.

따라서 출력드라이브단(20)에서는 마이콤(10)의 밴드선택단자(A1)(A2)를 통해 출력되는 밴드선택신호가 저항(R1)(R2)을 통해 트랜지스터(Q1)(Q2)를 구동시켜 튜우너의 밴드선택단자(V1)(V2)에 전원(B+)을 인가시켜 튜우너의 밴드(UHF)(VHF-L)를 선택하도록 하는 동시에 트랜지스터(Q1)(Q2)를 통하여 다이오드(D1)(D2)가 콘트롤 되면서 트랜지스터(Q3)가 구동되어 튜우너의 밴드 선택단자(V3)에 전원(B+)을 인가시켜 튜우너의 밴드(VHF-H)를 선택하도록 연결 구성한 것이다.Therefore, in the output drive stage 20, the band selection signal output through the band selection terminals A 1 and A 2 of the microcomputer 10 is transistors Q 1 and Q through the resistors R 1 and R 2 . 2 ) to drive the band selector (V 1 ) (V 2 ) of the tuner to supply power (B +) to select the tuner's band (UHF) (VHF-L) and at the same time transistor Q 1 (Q 2 ). Transistor Q 3 is driven by controlling diode (D 1 ) (D 2 ) through) to apply power (B +) to band selector (V 3 ) of tuner to select tuner band (VHF-H) The connection is configured.

이때 마이콤(10)의 밴드선택단자(A1)(A2)에서는 VHF-L밴드 선택시 밴드선택단자(A1)로 하이레벨 밴드선택단자(A2)로 로우레벨을 출력시키고, UHF밴드 선택시에는 상기와 반대의 전압레벨을 출력시키며, VHF-H밴드 선택시에는 밴드 선택단자(A1)(A2)로 하이레벨을 출력시키게 된다.At this time, the band selection terminal (A 1 ) (A 2 ) of the microcomputer 10 outputs the low level to the high level band selection terminal (A 2 ) to the band selection terminal (A 1 ) when the VHF-L band is selected, and the UHF band. The voltage level opposite to the above is output when selected, and the high level is output to the band selection terminals A 1 and A 2 when the VHF-H band is selected.

이와같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effects of the present invention configured in this way in detail as follows.

먼저 마이콤(10)의 밴드선택단자(A1)를 통해서 "로우레벨 상태"의 밴드선택 신호가 출력되고, 출력단자(A2)를 통해서 "하이레벨 상태"의 밴드 선택신호가 출력될 경우 저항(R1)을 통하여 트랜지스터(Q1)베이스에 "로우레벨상태"의 밴드 선택신호가 인가되면서 트랜지스터(Q1)를 "턴온"시켜, 전원(B+)을 트랜지스터(Q1)에미터에서 콜렉터를 통해 튜우너의 밴드선택단자(V1)에 인가시켜, 튜우너에 밴드(UHF)가 선택되도록 하는 동시에 다이오드(D3)를 통해 노드점(Va)에 전원(B+)이 인가되면서 트랜지스터(Q3)가 "턴오프"되게 된다.First, a band selection signal of "low level state" is output through the band selection terminal A 1 of the microcomputer 10, and a band selection signal of "high level state" is output through the output terminal A 2 . The band select signal of the "low level state" is applied to the base of the transistor Q 1 via (R 1 ), and the transistor Q 1 is turned "on", so that the power supply B + is collected from the emitter of the transistor Q 1 . The band select terminal V 1 of the tuner is applied to allow the band UHF to be selected to the tuner, and at the same time, the power B + is applied to the node point Va through the diode D 3 , thereby providing the transistor Q. 3 ) is " turned off ".

그리고 밴드선택단자(A2)에서 출력되는 하이레벨 상태의 밴드 선택 신호는 저항(R2)을 통하여 트랜지스터(Q2)를 "턴오프"시킴으로써 결국 마이콤(10)의 밴드 선택단자(A1)로 로우레벨, 밴드선택단자(A2)로 하이레벨이 출력된 경우에는 출력드라이브단(20)의 트랜지스터(Q1)만 "턴온"되고 트랜지스터(Q2)(Q3)는 "턴오프"되게 되므로써 튜우너의 밴드 선택단자(V1)에만 전원(B+)이 인가되는 것이다.The band select signal of the high level state output from the band select terminal A 2 is “turned off” the transistor Q 2 through the resistor R 2 , so that the band select terminal A 1 of the microcomputer 10 is eventually turned off. When the low level is low and the high level is output to the band select terminal A 2 , only the transistor Q 1 of the output drive stage 20 is "turned on" and the transistor Q 2 (Q 3 ) is "turned off". Therefore, the power supply B + is applied only to the band select terminal V 1 of the tuner.

따라서 튜우너의 밴드선택단자(V1)에만 전원(B+)이 공급되게 되므로 튜우너는 UHF밴드를 선택하게 되는 것이다.Therefore, the power supply B + is supplied only to the band selection terminal V 1 of the tuner, so that the tuner selects the UHF band.

또한 마이콤(10)의 출력단자(A1)를 통해서 "하이레벨 상태"의 밴드선택 신호가 출력되고 출력단자(A2)통해서 "로우 레벨 상태"의 밴드선택신호가 출력될 경우, 저항(R1)을 통하여 트랜지스터(Q1)베이스에 "하이레벨상태"의 밴드선택 신호가 인가되면서 트랜지스터(Q1)가 "턴오프"되게 하고, 저항(R2)을 통하여 인가되는 "로우 레벨상태"의 밴드선택 신호는 트랜지스터(Q2)베이스에 인가되어 트랜지스터(Q2)를 "턴온"시킴으로써 전원(B+)을 트랜지스터(Q2)에미터에서 콜렉터를 통해 튜우너의 밴드 선택단자(V2)에 인가시킴과 동시에, 다이오드(D2)를 통하여 노드점(Va)에 인가되므로써 트랜지스터(Q3)는 "턴오프"되게 된다.In addition, when the band selection signal of the "high level state" is output through the output terminal A 1 of the microcomputer 10 and the band selection signal of the "low level state" is output through the output terminal A 2 , the resistance R 1) the transistor (Q 1) as applied to the band select signal of "high-level" to the base transistor (Q 1) a "turn-off" to be, and "low-level state" is applied via the resistor (R 2) by the band selection signal to the transistor (Q 2) is applied to the base transistor (Q 2) a "turn-on" by the power (B +) of the transistor (Q 2) selection tyuwoo your band through the collector from the emitter terminal (V 2) At the same time, the transistor Q 3 is " turned off " by being applied to the node point Va through the diode D 2 .

따라서 마이콤(10)의 밴드 선택단자(A1)로 하이레벨, 밴드선택단자(A2)로 로우레벨이 출력될 경우에는 출력드라이브단(20)의 트랜지스터(Q2)만 "턴온"되고 트랜지스터(Q1)(Q3)는 "턴오프"되게 되므로써 튜우너의 밴드 선택단자(V2)에만 전원(B+)이 인가되는 것이다.Therefore, when the high level is output to the band selection terminal A 1 of the microcomputer 10 and the low level is output to the band selection terminal A 2 , only the transistor Q 2 of the output drive terminal 20 is "turned on" and the transistor is turned on. Since Q 1 and Q 3 are " turned off ", the power supply B + is applied only to the band select terminal V 2 of the tuner.

그러므로 마이콤(10)의 밴드선택단자(A1)로 하이레벨, 밴드선택단자(A2)로 로우레벨을 출력시킬 경우 튜우너의 밴드 선택단자(V2)에만 전원(B+)이 공급되게 되므로써 튜우너는 VHF-L밴드를 선택하게 되는 것이다.Therefore, when outputting the high level to the band selection terminal A 1 of the microcomputer 10 and the low level to the band selection terminal A 2 , the power supply B + is supplied only to the band selection terminal V 2 of the tuner. You choose the VHF-L band.

또한 마이콤(10)의 출력단자(A1)를 통해서 "하이레벨상태"의 밴드선택신호가 출력되고 출력단자(A2)를 통해서도 "하이레벨 상태"가 출력될 경우, 저항(R1)(R2)을 통해 트랜지스터(Q1)(Q2)베이스에 "하이레벨 상태"의 밴드 선택 신호가 인가되면서 트랜지스터(Q1)(Q2)는 "턴오프"된다.In addition, when the band selection signal of the "high level state" is output through the output terminal A 1 of the microcomputer 10 and the "high level state" is also output through the output terminal A 2 , the resistor R 1 ( R 2) through the transistor (Q 1) (Q 2) as applied to the band select signal of "high-level" to the base transistor (Q 1) (Q 2) it is "off".

그러므로 다이오드(D2)(D3)를 통하여 노드점(Va)에 전원(B+)이 인가되지 못하게 되므로 저항(R5)을 통하여 인가되는 전원(B+)이 다이오드(D1), 저항(R6)을 통해 접지에 인가되면서, 트랜지스터(Q3)의 베이스가 "로우레벨 상태"가 되어 트랜지스터(Q3)를 "턴온"시켜 전원(B+)을 트랜지스터(Q3)에미터에서 콜렉터를 통해 튜우너의 밴드선택단자(V3)에 인가시켜 주게 된다.Therefore, since the power supply B + is not applied to the node point Va through the diode D 2 and D 3 , the power supply B + applied through the resistor R 5 is the diode D 1 and the resistor R. as applied to the ground through 6), the base of the transistor (Q 3) is a "low-level" transistor (Q 3) to to "turn-on" through the collector of the power (B +) from the transistor (Q 3), the emitter It is applied to the band selection terminal (V 3 ) of the tuner.

따라서 마이콤(10)의 밴드선택단자(A1)(A2)로 하이레벨신호가 출력될 경우에는 출력드라이브단(20)의 트랜지스터(Q1)(Q2)는 "턴오프"되고 트랜지스터(Q3)만 "턴온"되어 튜우너의 밴드 선택단자(V3)에만 전원(B+)을 공급시킴으로써 튜우너는 VHF-H밴드를 선택하게 되는 것이다.Therefore, when the high level signal is output to the band selection terminal A 1 (A 2 ) of the microcomputer 10, the transistors Q 1 and Q 2 of the output drive terminal 20 are " turned off " Only Q 3 ) is "turned on" so that the tuner selects the VHF-H band by supplying power (B +) only to the tuner's band selector (V 3 ).

이상에서와 같이 본 고안은 마이콤에서 2개의 밴드 선택신호가 출력될때 출력드라이브단을 통하여 튜우너에 밴드 선택 전압을 공급시킬수 있으므로 튜우너의 밴드를 선택하기 위해서는 전용의 밴드 선택 집적회로(LA7910)를 사용하여야만 하는 불편함을 해소시킬수 있으며, 또한 마이콤에서 직접 3개의 밴드 선택신호를 출력시키기 위하여 마이콤 내부를 다시 설계하여야 하는 어려움을 없앨수 있는 것이다.As described above, the present invention can supply a band selection voltage to the tuner through the output drive stage when two band selection signals are output from the microcomputer. Therefore, a dedicated band selection integrated circuit (LA7910) is used to select the band of the tuner. The inconvenience of having to do it can be eliminated, and also the difficulty of redesigning the inside of the microcomputer to output 3 band selection signals directly from the microcomputer can be eliminated.

Claims (1)

마이콤(10)에서 출력되는 밴드선택신호에 따라 튜우너의 밴드를 선택하는 회로에 있어서, 마이콤(10)의 밴드선택신호로 트랜지스터(Q1)(Q2)의 구동을 제어하고, 트랜지스터(Q1)(Q2)의 출력에 따라 다이오드(D1-D3)가 연결된 트랜지스터(Q3)의 구동을 제어하여, 상기 트랜지스터(Q1-Q3)의 구동에 의하여 튜우너의 밴드 선택단자(V1)(V2)(V3)에 전원(B+)이 공급되게 구성한 튜우너의 밴드 선택회로.Microcomputer 10 tyuwoo according to a band selection signal output from the in circuit to select your band, control the operation of the microcomputer 10, a band selection signal to the transistor (Q 1) (Q 2) of the transistor (Q 1 ) (Q 2) the output diode (D 1 -D 3) is used to control the driving of the associated transistor (Q 3), said transistors (Q 1 -Q 3) select your tyuwoo band by the driving of the terminal (V in accordance with the 1 ) Tuner band selection circuit configured to supply power (B +) to (V 2 ) (V 3 ).
KR2019880021182U 1988-12-22 1988-12-22 Band selecting circuit for tuner KR910004460Y1 (en)

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KR2019880021182U KR910004460Y1 (en) 1988-12-22 1988-12-22 Band selecting circuit for tuner

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Application Number Priority Date Filing Date Title
KR2019880021182U KR910004460Y1 (en) 1988-12-22 1988-12-22 Band selecting circuit for tuner

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KR900013625U KR900013625U (en) 1990-07-05
KR910004460Y1 true KR910004460Y1 (en) 1991-06-29

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