CN2242544Y

CN2242544Y - Active circuit TV aerial with integrated waveband selection and remote control

Info

Publication number: CN2242544Y
Application number: CN 95221788
Authority: CN
Inventors: 万军
Original assignee: ANKANG ELECTRONIC TECHNOLOGY DEVELOPMENT INST SHANXI PROV
Current assignee: ANKANG ELECTRONIC TECHNOLOGY DEVELOPMENT INST SHANXI PROV
Priority date: 1995-09-22
Filing date: 1995-09-22
Publication date: 1996-12-11
Anticipated expiration: 2005-09-22

Abstract

The utility model relates to a band remote-control integration active television antenna which is composed of a waterproof box, a VHF band amplifier (28), a UHF band amplifier (30), a single-pole triple-throw electronic switch (31), a power supply control box (32), a power supply control circuit, an antenna (29), etc. Because the utility model adopts the balance type amplifier and a structure of band amplification, the equivalent changeable antenna is selected to be used, and the utility model has the characteristics of obvious system signal-to-noise ratio improvement, and stable and reliable operation, and furthermore, the utility model is widely used for television receiving in various occasions.

Description

The integrated active tv antenna of wave band remote control

The utility model belongs to the TV antenna booster technology, and specifically it is the integrated active tv antenna of a kind of wave band remote control.

The active tv antenna is commonly called as antenna amplifier antennafire, and it and tv broadcasting technology develop simultaneously, the developing history of existing decades.Along with the development of society, television transmitting station, FM broadcasting transmitting station and communication transmitting station increase swift and violent, make space wave very crowded and disorderly and unsystematic.The TV programme of, weak output signal far for receiving range, must serviceability TV antenna booster preferably.Introduced a kind of high-gain multipurpose radio frequency signal amplifiers in China's utility application prospectus as application number 90213447.7, it is made up of filter, amplifier and power supply three parts, filter adopts the scheme of high and low frequency range dual input, its amplifying circuit adopts single channel to amplify, front and back are divided into level Four, two-stage amplification is to be realized by a special-purpose integrated package in the middle of it, prime and not the level all form by a triode and related elements, this amplifier can be used for multiple occasions such as TV.But this amplifier is also the same with traditional amplifier to have pair weak signal to improve DeGrain, strong signal floods deficiencies such as weak signal.

The purpose of this utility model provides the integrated active tv antenna of a kind of wave band remote control, to overcome the deficiencies in the prior art.

Accompanying drawing has provided electrical structure of the present utility model.

Accompanying drawing 1 is the utility model VHF wave band balance amplifier circuit diagram.Accompanying drawing 2 is the utility model SP3T electronic switching circuit figure.Accompanying drawing 3 is the utility model UHF wave band balance amplifier circuit diagram.Accompanying drawing 4 is the utility model reception antenna control circuit figure.Accompanying drawing 5 is the utility model voltage stabilizing circuit figure.Accompanying drawing 6 is the utility model system line graph.

The purpose of this utility model can reach by following structures in conjunction with the accompanying drawings.The utility model is by compartment and amplifier circuit, power control box (32) and power control circuit, antenna formations such as (29), main points of the present utility model are that VHF band amplifier (28) and UHF band amplifier (30) two cover amplifier circuits are housed in compartment, field effect transistor Q1, Q2 and its imput output circuit and biasing auxiliary circuit constitute balanced type VHF band amplifier (28), field effect transistor Q1, the input circuit of Q2 is by inductance L 1, L2, L3, L4, L5, L6, L7, L8, capacitor C 1, C2, C3, C4, C7, C8, C9, C10, C11 and resistance R 1, R2 constitutes, at field effect transistor Q1, also have in the input circuit of Q2 by resistance R 3, R4, R5, R6, R7, R8, R9, capacitor C 5, C6 and switching diode D1, the conversion input circuit band circuitry that D2 constitutes, field effect transistor Q1, the output loop of Q2 is by inductance L 9, L10, L11, L12, L13, L14, capacitor C 24, C25, C26, C27, C28, C29, C30, C31, resistance R 26, R27, R28, R29 and power combiner B1 constitute, at field effect transistor Q1, also have in the output circuit of Q2 by switching diode D3, D4, D5 and high frequency choke coil ZL1, ZL2, the conversion output loop band circuitry that ZL3 constitutes, field effect transistor Q1, the first grid biasing circuit of Q2 is by resistance R 14, R15, R16, R17, R18, R19, capacitor C 12, C13 constitutes, field effect transistor Q1, second gate bias circuit of Q2 is by resistance R 20, R21, R22, R23, R24, R25, capacitor C 14, C15, C16, C17 constitutes, field effect transistor Q1, the source bias circuits of Q2 is by resistance R 10, R11, R12, R13, capacitor C 18, C19 constitutes, VHF band amplifier (28) has two input terminals (1) and (2), a lead-out terminal (3) is arranged, a power supply terminal (4) is arranged, a 1-4 frequency range frequency-selecting control terminal (5) and a 6-12 frequency range frequency-selecting control terminal (6) are arranged, field effect transistor Q11, Q12 and its imput output circuit and biasing auxiliary circuit constitute balanced type UHF band amplifier (30), field effect transistor Q11, the input circuit of Q12 is by inductance L 15, L16, L17, L18, capacitor C 34, C35, C36, C37 constitutes, field effect transistor Q11, the output loop of Q12 is by inductance L 19, L20, L21, capacitor C 47, C48, C49, C50, resistance R 55, R56 constitutes, field effect transistor Q11, the first grid biasing circuit of Q12 is by resistance R 39, R40, R41, R42, R43, R44, capacitor C 40, C41 constitutes, field effect transistor Q11, second gate bias circuit of Q12 is by resistance R 45, R46, R47, R48, R49, R50, capacitor C 42, C43, C44, C45 constitutes, field effect transistor Q11, the source bias circuits of Q12 is by resistance R 51, R52, R53, R54, capacitor C 38, C39 constitutes, the UHF band amplifier has two input terminals (13) and (14), a lead-out terminal (15) is arranged, a power supply terminal (16) is arranged, SP3T electronic switch (31) also is housed in compartment, it is by triode Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, voltage stabilizing didoe D6, D7, resistance R 31, R32, R33, R34, R35, R36, R37, R38, two bistable circuits that high frequency choke coil ZL4 constitutes are formed, SP3T electronic switch (31) has a power supply and a frequency range control signal terminal (12) that joins with VHF band amplifier (37) lead-out terminal (3) and UHF band amplifier (30) lead-out terminal (15), one low-grade voltage output end (8) that joins with VHF band amplifier (28) 1-4 frequency range frequency-selecting control terminal (5) is arranged, one middle-grade voltage output end (9) that joins with VHF band amplifier (28) 6-12 frequency range frequency-selecting control terminal (6) is arranged, one low and middle-grade voltage output end (7) that join with VHF band amplifier (28) power supply terminal (4) are arranged, one high-grade voltage output end (11) that joins with UHF band amplifier (30) power supply terminal (16) is arranged, also has an earth terminal (10), the power control circuit that is installed in the power control box (32) is by power transformer B2, rectifier bridge JC1, capacitor C 57, C58, C59, high frequency choke coil ZL12, three terminal regulator IC1, voltage stabilizing didoe D16, D17 and three interlocking-type K switch 1 constitute, power control circuit has a power supply terminal (27) that can join with civil power, one direct current power output terminal (25) is arranged, one TV signal output end (26) is arranged, have a cable to be connected between the power supply and frequency range control signal terminal (12) of dc power output end (25) and SP3T electronic switch (31).So in use, compartment is fixed on outdoor, power control box (32) is installed in indoor, press three interlocking-type K switch 1 one of them, power pack output corresponding voltage value, power pack can be exported low respectively, in, high third gear voltage, this voltage passes to SP3T electronic switch (31) in the compartment by cable, electronic switch (31) will be differentiated it, because electronic switch (31) is to be made of two bistable circuits, its turnover voltage depends on the reference voltage of two voltage stabilizing didoe D6 and D7, the reference voltage value of voltage stabilizing didoe D6 is chosen to be greater than the low-grade magnitude of voltage of power pack output and is equal to or less than the middle-grade magnitude of voltage that power pack is exported, and the reference voltage value of voltage stabilizing didoe D7 is chosen to be the middle-grade magnitude of voltage and the high-grade magnitude of voltage that is equal to or less than power pack output greater than power pack output; When power pack is exported low-grade magnitude of voltage, give VHF band amplifier (37) power supply by electronic switch (31), and make it be operated in the 1-4 channel by the Frequency Band Selection circuit; When power pack is exported middle-grade magnitude of voltage, give VHF band amplifier (28) power supply by electronic switch (31), and make it be operated in the 6-12 channel by the Frequency Band Selection circuit; When power pack is exported high-grade magnitude of voltage, give UHF band amplifier (30) power supply by electronic switch (31).Owing to adopted the balanced type amplifying circuit, reception antenna can directly be connected with amplifier circuit, has removed traditional balanced-unbalanced impedance transformer, and only this system signal noise ratio can improve about 2 decibels.Owing to adopted unique SP3T electronic switch parts, make the frequency division amplifying technique be used very easily in the active tv field of antenna again, this plays important effect to anti-intermodulation of active tv antenna and performance such as anti-interference.

In order to obtain better reception, antenna of the present utility model (29) is the both sides that are separately fixed at compartment by two sections " U " shape arms (23) and (24), on two sections " U " shape arms (23) of antenna (29) and (24), be connected to respectively by switching diode D9, resistance R 61, R63, R65, R67, capacitor C 53, C55, high frequency choke coil ZL6, ZL7 and switching diode D10, D11, resistance R 62, R64, R66, R68, capacitor C 54, C56, high frequency choke coil ZL8, the gating circuit that ZL9 constitutes, between two sections " U " shape arms of antenna (29), be connected to by switching diode D8, resistance R 57, R58, R59, R60, capacitor C 51, C52, high frequency choke coil ZL10, the gating circuit that ZL11 constitutes, gating circuit has a 1-4 band antenna frequency-selecting terminal (18) that joins with low-grade voltage output end of SP3T electronic switch (31) (8), the one 6-12 band antenna frequency-selecting terminal (17) that joins with middle-grade voltage output end of SP3T electronic switch (31) (9) is arranged, the one VHF band antenna frequency-selecting terminal (19) that joins with low and middle-grade voltage output end of SP3T electronic switch (7) is arranged, the one uhf band antenna frequency-selecting terminal (20) that joins with high-grade voltage output end of SP3T electronic switch (31) (11) is arranged, and the signal output terminal (21) of (29) two sections " U " shapes of antenna arm and (22) join with the input terminal (1) of VHF band amplifier and input terminal (13) and (14) of (2) and UHF band amplifier (30) respectively.So in use, when the low-grade magnitude of voltage of power control box (32) output, by electronic switch (31) switching diode D8, D9, D10 are instead ended partially, this reception antenna is equivalent to dipole antenna, and it is received 1-4 channel TV signal effect preferably; When the middle-grade magnitude of voltage of power control box (32) output, by electronic switch (31), make the conducting of diode D8 positively biased, diode D9, D10 instead end partially, this reception antenna equivalence is a folded dipole antenna, and it is received 6-12 channel TV signal effect preferably; When the high-grade magnitude of voltage of power control box (32) output, by electronic switch (31), make diode D8, D9, the conducting of D10 positively biased, this reception antenna equivalence is short folded dipole antenna, it is received UHF wave band TV signal effect preferably.Thereby the TV signal of any channel no matter, reception antenna (29) can both match, and higher gain is arranged.

The utility model is owing to adopted balance amplifier and the structure of subrane amplification, and selected for use equivalent variable to change antenna, make obvious improvement system signal-noise ratio, the stable and reliable operation characteristics of the utlity model has, thereby reached the purpose of this utility model, can be widely used in the television reception of various occasions.

Claims

1, a kind of by compartment and amplifier circuit, power control box (32) and power control circuit, the integrated active tv antenna of wave band remote control that antenna (29) constitutes, feature of the present utility model is that VHF band amplifier (28) and UHF band amplifier (30) two cover amplifier circuits are housed in compartment, field effect transistor Q1, Q2 and its imput output circuit and biasing auxiliary circuit constitute balanced type VHF band amplifier (28), field effect transistor Q1, the input circuit of Q2 is by inductance L 1, L2, L3, L4, L5, L6, L7, L8, capacitor C 1, C2, C3, C4, C7, C8, C9, C10, C11 and resistance R 1, R2 constitutes, at field effect transistor Q1, also have in the input circuit of Q2 by resistance R 3, R4, R5, R6, R7, R8, R9, capacitor C 5, C6 and switching diode D1, the conversion input circuit band circuitry that D2 constitutes, field effect transistor Q1, the output loop of Q2 is by inductance L 9, L10, L11, L12, L13, L14, capacitor C 24, C25, C26, C27, C28, C29, C30, C31, resistance R 26, R27, R28, R29 and power combiner B1 constitute, at field effect transistor Q1, also have in the output circuit of Q2 by switching diode D3, D4, D5 and high frequency choke coil ZL1, ZL2, the conversion output loop band circuitry that ZL3 constitutes, field effect transistor Q1, the first grid biasing circuit of Q2 is by resistance R 14, R15, R16, R17, R18, R19, capacitor C 12, C13 constitutes, field effect transistor Q1, second gate bias circuit of Q2 is by resistance R 20, R21, R22, R23, R24, R25, capacitor C 14, C15, C16, C17 constitutes, field effect transistor Q1, the source bias circuits of Q2 is by resistance R 10, R11, R12, R13, capacitor C 18, C19 constitutes, VHF band amplifier (28) has two input terminals (1) and (2), a lead-out terminal (3) is arranged, a power supply terminal (4) is arranged, a 1-4 frequency range frequency-selecting control terminal (5) and a 6-12 frequency range frequency-selecting control terminal (6) are arranged, field effect transistor Q11, Q12 and its imput output circuit and biasing auxiliary circuit constitute balanced type UHF band amplifier (30), field effect transistor Q11, the input circuit of Q12 is by inductance L 15, L16, L17, L18, capacitor C 34, C35, C36, C37 constitutes, field effect transistor Q11, the output loop of Q12 is by inductance L 19, L20, L21, capacitor C 47, C48, C49, C50, resistance R 55, R56 constitutes, field effect transistor Q11, the first grid biasing circuit of Q12 is by resistance R 39, R40, R41, R42, R43, R44, capacitor C 40, C41 constitutes, field effect transistor Q11, second gate bias circuit of Q12 is by resistance R 45, R46, R47, R48, R49, R50, capacitor C 42, C43, C44, C45 constitutes, field effect transistor Q11, the source bias circuits of Q12 is by resistance R 51, R52, R53, R54, capacitor C 38, C39 constitutes, the UHF band amplifier has two input terminals (13) and (14), a lead-out terminal (15) is arranged, a power supply terminal (16) is arranged, SP3T electronic switch (31) also is housed in compartment, it is by triode Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, voltage stabilizing didoe D6, D7, resistance R 31, R32, R33, R34, R35, R36, R37, R38, two bistable circuits that high frequency choke coil ZL4 constitutes are formed, SP3T electronic switch (31) has a power supply and a frequency range control signal terminal (12) that joins with VHF band amplifier (37) lead-out terminal (3) and UHF band amplifier (30) lead-out terminal (15), one low-grade voltage output end (8) that joins with VHF band amplifier (28) 1-4 frequency range frequency-selecting control terminal (5) is arranged, one middle-grade voltage output end (9) that joins with VHF band amplifier (28) 6-12 frequency range frequency-selecting control terminal (6) is arranged, one low and middle-grade voltage output end (7) that join with VHF band amplifier (28) power supply terminal (4) are arranged, one high-grade voltage output end (11) that joins with UHF band amplifier (30) power supply terminal (16) is arranged, also has an earth terminal (10), the power control circuit that is installed in the power control box (32) is by power transformer B2, rectifier bridge JC1, capacitor C 57, C58, C59, high frequency choke coil ZL12, three terminal regulator IC1, voltage stabilizing didoe D16, D17 and three interlocking-type K switch 1 constitute, power control circuit has a power supply terminal (27) that can join with civil power, one direct current power output terminal (25) is arranged, one TV signal output end (26) is arranged, have a cable to be connected between the power supply and frequency range control signal terminal (12) of dc power output end (25) and SP3T electronic switch (31).

2, according to the integrated active tv antenna of the described wave band remote control of claim 1, its antenna (29) that is characterised in that of the present utility model is the both sides that are separately fixed at compartment by two sections " U " shape arms (23) and (24), on two sections " U " shape arms (23) of antenna (29) and (24), be connected to respectively by switching diode D9, resistance R 61, R63, R65, R67, capacitor C 53, C55, high frequency choke coil ZL6, ZL7 and switching diode D10, D11, resistance R 62, R64, R66, R68, capacitor C 54, C56, high frequency choke coil ZL8, the gating circuit that ZL9 constitutes, between two sections " U " shape arms of antenna (29), be connected to by switching diode D8, resistance R 57, R58, R59, R60, capacitor C 51, C52, high frequency choke coil ZL10, the gating circuit that ZL11 constitutes, gating circuit has a 1-4 band antenna frequency-selecting terminal (18) that joins with low-grade voltage output end of SP3T electronic switch (31) (8), the one 6-12 band antenna frequency-selecting terminal (17) that joins with middle-grade voltage output end of SP3T electronic switch (31) (9) is arranged, the one VHF band antenna frequency-selecting terminal (19) that joins with low and middle-grade voltage output end of SP3T electronic switch (7) is arranged, the one uhf band antenna frequency-selecting terminal (20) that joins with high-grade voltage output end of SP3T electronic switch (31) (11) is arranged, and the signal output terminal (21) of (29) two sections " U " shapes of antenna arm and (22) join with the input terminal (1) of VHF band amplifier and input terminal (13) and (14) of (2) and UHF band amplifier (30) respectively.