KR890002881Y1 - Auto precise ajusting range compensating circuit for satellite receiver - Google Patents

Auto precise ajusting range compensating circuit for satellite receiver Download PDF

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Publication number
KR890002881Y1
KR890002881Y1 KR2019860004878U KR860004878U KR890002881Y1 KR 890002881 Y1 KR890002881 Y1 KR 890002881Y1 KR 2019860004878 U KR2019860004878 U KR 2019860004878U KR 860004878 U KR860004878 U KR 860004878U KR 890002881 Y1 KR890002881 Y1 KR 890002881Y1
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South Korea
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voltage
tuning
satellite receiver
channel
output
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KR2019860004878U
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Korean (ko)
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KR870017451U (en
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김철진
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삼성전자 주식회사
한형수
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Priority to KR2019860004878U priority Critical patent/KR890002881Y1/en
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Publication of KR890002881Y1 publication Critical patent/KR890002881Y1/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/10—Circuit arrangements for fine tuning, e.g. bandspreading
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite

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  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

내용 없음.No content.

Description

위성수신기의 자동 미조정 레인지 보상회로Automatic fine adjustment range compensation circuit of satellite receiver

제1도는 종래의 회로도.1 is a conventional circuit diagram.

제2도는 본 고안의 회로도.2 is a circuit diagram of the present invention.

제3도는 바랙터 다이오드의 전압 특성도.3 is a voltage characteristic diagram of a varactor diode.

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

10 : 전압 중첩부 4 : 채널선택 집적소자10: voltage overlapping portion 4: channel select integrated device

3 : 키보드 VR, VR1, VR2: 가변저항3: Keyboard VR, VR 1 , VR 2 : Variable resistor

D1, D2, D3 D4: 바랙터다이오드 Q1, Q2: 트랜지스터D 1 , D 2 , D 3 D 4 : varactor diode Q 1 , Q 2 : transistor

R1, R2, R3: 저항 OP1: 연산증폭부R 1 , R 2 , R 3 : Resistance OP 1 : Operational Amplifier

본 고안은 위성수신기의 채널 선국시 자동미조정 레인지가 일정하게 되도록 보상시킨 것이다.The present invention compensates for the constant automatic fine tuning range during channel selection of the satellite receiver.

위성수신기의 채널 선택 집적소자에는 가변저항 및 바랙터 다이오드를 연설 구성시켜 채널 선국시 튜우닝 전압이 출력되도록 구성시켰기 때문에 채널 선국시에 바랙터 다이오드에 의한 특성에 의하여 고채널 및 저채널의 자동미조정레인지가 서로 다르게 되는 것이었다.Since the variable resistance and varactor diodes are constructed in the channel select integrated device of the satellite receiver, the tuning voltage is output during channel selection. The adjustment range was different.

본 고안은 이와 같은 점을 감안하여 고채널 및 저채널 수신시 항상 자동미조정레인지가 일정하게 되도록 보상시킨 것으로 전압중첩부에서 자동미조정 전압과 전원(B+)이 중첩되어 트랜지스터를 통하여 각 가변저항에 인가되게 구성한 것이다.The present invention compensates for the constant auto-tuning range at the time of high channel and low channel reception in consideration of the above. The auto-tuning voltage and the power supply (B + ) are overlapped at the voltage overlapping unit, and each variable is changed through the transistor. It is configured to be applied to a resistor.

이를 제2도의 도면에 의하여 상세히 설명하면 다음과 같다.This will be described in detail with reference to FIG. 2 as follows.

제2도는 본 고안의 회로도로서 키보드(3)에 채널선택 집적소자(4)를 구성시켜 선국되게 구성하며 각각의 출력단자에 가변저항(VR1-VR24)및 바랙터 다이오드(D1-D24)를 연결 구성시킨후 출력측 트랜지스터(Q1)로 튜우닝 전압(VT)이 출력되게 구성하고 자동미조정 전압(VAFT) 및 전원(B+)이 저항(R5-R7) 및 가변저항(VR)을 통하여 연산증폭기(OP1)로 트랜지스터(Q2)의 출력이 제어하게 전압중첩부(10)를 구성하여 중첩된 전압이 각각의 가변저항(VR1-VR21)에 인가되게 구성시킨 것이다.FIG. 2 is a circuit diagram of the present invention, in which the channel selection integrated device 4 is configured on the keyboard 3 to be tuned, and the variable resistors VR 1- VR 24 and varactor diodes D 1 -D are provided at respective output terminals. 24 ) After tuning, configure the tuning voltage (VT) to the output transistor (Q 1 ) and the automatic fine adjustment voltage (VAFT) and power supply (B + ) are resistors (R 5 -R 7 ) and variable resistors. The voltage overlapping unit 10 is configured to control the output of the transistor Q 2 to the operational amplifier OP 1 through the VR so that the overlapping voltage is applied to each of the variable resistors VR 1- VR 21 . It is.

이와 같이 구성된 본 고안을 종래의 회로도와 비교하여 설명하면 다음과 같다.The present invention configured as described above will be described in comparison with the conventional circuit diagram.

제1도는 종래의 회로도로서 채널선택 집적소자(4)에는 24개의 채널이 있는데 각 채널의 튜닝 전압은 각 가변저항(VR1 VR24)으로 셋팅한 다음 키보드(3)와 채널선택 집적소자(4)를 통하여 가변저항(VR1 VR24)에 셋팅된 채널의 튜닝 전압에 자동미조정 전압을 중첩시켜 연산증폭기(OP1)로 튜너에 튜닝 전압을 공급하고 있으나 이와 같이 튜닝 전압을 공급하는 경우는 자동미조정 레인지가 서로 다르기 때문에 이를 보상시킬 필요가 있는 것이었다.FIG. 1 is a circuit diagram of the related art, in which the channel select integrated device 4 has 24 channels, and the tuning voltages of the channels are each variable resistor VR 1. VR 24 ) and then the variable resistor (VR 1 ) through the keyboard (3) and the channel selection integrated device (4). The tuning voltage of the channel set in VR 24 ) is superimposed on the tuning voltage to the tuner by using the operational amplifier (OP 1 ), but the tuning voltage is different when the tuning voltage is supplied in this way. It was necessary to compensate for this.

즉 연산증폭기(OP1)의 특성에 의한 튜닝 전압(VT)은가 되는데 여기서 VAFT(자동미조정 전압)는 각 채널에 관계없이 일정하고 제3도에서와 같이 바랙터 다이오드(D1-D24)는 그 특성에 의하는 바와 같이 전압 변동에 의하여 캐패시던스(C)값이 변하는 것으로 전압이 높은 쪽에서는 전압 변동에 의한 캐패시던스의 값이 적게 변하나 전압이 낮은 쪽(저채널)은 캐패시던스의 값이 크게 변하게 된다.That is, the tuning voltage VT by the characteristic of the operational amplifier OP 1 is VAFT is constant regardless of each channel, and varactor diodes D 1 -D 24 , as shown in FIG. The value of C) changes, so that the higher the voltage, the smaller the value of capacitance due to voltage variation, but the lower the voltage (lower channel), the larger the value of capacitance.

따라서 자동미조정 전압(VAFT)이 채널에 관계없이 일정하게 인가될 때에 트랜지스터(Q1)의 출력전압(VQ1)이 낮은 쪽(저채널)의 자동미조정 레인지가 트랜지스터(Q1)의 출력전압(VQ1)이 높은 쪽(고채널)보다 자동미조정 레인지(AFT RANGE)가 넓게 되는 것으로 이를 보상시킬 필요가 있는 것이다.Therefore, automatic fine tuning voltage (VAFT) the output voltage when the applied constant regardless of the channel transistor (Q 1) (VQ 1) the output of the automatic fine tuning range and the transistor (Q 1) of the low-side (low channel) The automatic tuning range (AFT RANGE) is wider than the one where the voltage VQ 1 is higher (high channel) and needs to be compensated for.

본 고안은 제2도와 같이 자동미조정 전압(VAFT)으로 트랜지스터(Q2)의 출력전압(VQ2)을 조절하여 자동미조정 레인지가 채널에 따라 일정하게 조정되게 한 것으로 전압중첩부(10)에 공급되는 자동미조정 전압(VAFT)이 연산증폭기(OP1)의 일측단자(-)에 인가되고 타측단자(+)에는 전원(B+)이 가변저항(VR)을 통하여 인가되므로 연산증폭기(OP1)는 저항(R5-R7) 및 가변저항(VR)의 분배전압에 따라 인가되는 일정한 전압을 트랜지스터(Q2)의 베이스측에 인가하고 트랜지스터(Q2)의 에미터측은 자동미조정 전압(VAFT)과 중첩된 전압(VQ2)이 증폭되어 출력하게 된다.The present invention adjusts the output voltage VQ 2 of the transistor Q 2 with the automatic fine adjustment voltage VAFT as shown in FIG. 2 so that the automatic fine adjustment range is constantly adjusted according to the channel. The automatic fine adjustment voltage VAFT supplied to the terminal is applied to one terminal (-) of the operational amplifier OP 1 and the power supply B + is applied to the other terminal (+) through the variable resistor VR. OP 1) has a resistance (R 5 -R 7) and the emitter of the variable resistor (VR) is applied to the transistor (Q 2) a constant voltage is applied in accordance with the voltage distribution on the base side of the transistor (Q 2) of the side automatic US The voltage VQ 2 superimposed with the adjustment voltage VAFT is amplified and output.

이때 키보드(3)에 의하여 채널선택 집적소자(4)의 출력단자(1)로 출력된다고 가정할 때 가변저항(VR1)의 중간탭 전압(VD)은가 되는데 여기서 저채널 선국시 저항(RB)에 인가되는 전압이 적으므로 트랜지스터(Q2)의 출력전압(VQ2)은 중간탭전압(VD)에 적은 영향을 미치게 되고 반대로 고채널이 선국되는 경우는 저항(RB)에 인가되는 전압이 커서 출력전압(VQ2)은 중간탭 전압(VD)에 크게 영향을 미치게 되며 트랜지스터(Q2)의 출력전압(VQ2)에는 자동미조정 전압(VAFT)이 중첩되어 있으므로 결과적으로 중간탭전압(VD)은 저채널에서 자동미조정 전압의 영향을 적게 받고 고채널에서는 중간탭전압(VD)은 자동미조정 전압(VAFT)의 영향을 많이 받게 되므로 바렉터 다이오드(D1-D24)의 특성을 보완시켜주게 되어 각 채널 선국시 자동미조정 레인지가 일정하게 보상되는 것이다.At this time, assuming that the keyboard 3 is output to the output terminal 1 of the channel selection integrated device 4, the middle tap voltage VD of the variable resistor VR 1 is In this case, since the voltage applied to the resistor RB during low channel tuning is small, the output voltage VQ 2 of the transistor Q 2 has little influence on the middle tap voltage VD. Since the voltage applied to the resistor RB is large, the output voltage VQ 2 greatly affects the middle tap voltage VD, and the automatic voltage VVA is applied to the output voltage VQ 2 of the transistor Q 2 . As the result, the middle tap voltage (VD) is less affected by the automatic fine adjustment voltage in the low channel, and the middle tap voltage (VD) is affected by the automatic fine adjustment voltage (VAFT) in the high channel. Complementing the characteristics of the diodes (D 1 -D 24 ), the automatic fine-tuning range is constantly compensated for each channel tuning.

이상에서와 같이 본 고안은 채널 선국시 각 채널의 출력전압이 바랙터 다이오드의 특성에 의하여 자동미조정 레인지가 상이하게 되는 것을 전압중첩부의 전원(B+전원 : VAFT 전원)으로 각 가변 저항에 보상시켜 줌으로써 일정한 자동미조정 레인지를 유지할 수가 있어 각 채널에 따라 미세조정의 폭을 일정하게 설정할 수있는 효과가 있는 것이다.As described above, the present invention compensates each variable resistor with the power of the voltage overlapping part (B + power supply: VAFT power supply) that the output voltage of each channel is different from the automatic fine adjustment range due to the characteristics of the varactor diode. By making it possible to maintain a constant automatic fine adjustment range, it is effective to set the width of fine adjustment uniformly according to each channel.

Claims (1)

채널선택 집적소자(4)의 출력이 가변저항(VR1-VR24) 및 다이오드(D1-D24)를 통하여 트랜지스터(Q1)로 튜우닝 전압(VT)이 출력되게 구성한 위성수신기의 선국회로에 있어서, 자동미조정 전압(VAFT) 및 전원(B+)이 저항(R45-R7) 및 가변저항(VR)과 연결된 연산증폭기(OP1)를 통하여 트랜지스터(Q2)로 출력되게 전압중첩부(10)를 구성하여 각 가변저항(VR1-VR24)에 인가되게 구성한 위성수신기의 자동 미조정 레인지 보상회로.Tuning of the satellite receiver configured to output the tuning voltage VT to the transistor Q 1 through the variable resistors VR 1- VR 24 and the diodes D 1 -D 24 . In the circuit, the automatic fine adjustment voltage VAFT and the power supply B + are output to the transistor Q 2 through the operational amplifier OP 1 connected with the resistors R 45 -R 7 and the variable resistor VR. An automatic fine adjustment range compensation circuit of a satellite receiver configured by applying a voltage overlapping unit (10) to be applied to each variable resistor (VR 1- VR 24 ).
KR2019860004878U 1986-04-12 1986-04-12 Auto precise ajusting range compensating circuit for satellite receiver KR890002881Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019860004878U KR890002881Y1 (en) 1986-04-12 1986-04-12 Auto precise ajusting range compensating circuit for satellite receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019860004878U KR890002881Y1 (en) 1986-04-12 1986-04-12 Auto precise ajusting range compensating circuit for satellite receiver

Publications (2)

Publication Number Publication Date
KR870017451U KR870017451U (en) 1987-11-30
KR890002881Y1 true KR890002881Y1 (en) 1989-05-08

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Application Number Title Priority Date Filing Date
KR2019860004878U KR890002881Y1 (en) 1986-04-12 1986-04-12 Auto precise ajusting range compensating circuit for satellite receiver

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KR870017451U (en) 1987-11-30

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