CN2338926Y

CN2338926Y - TV signals receiver

Info

Publication number: CN2338926Y
Application number: CN98216112U
Authority: CN
Inventors: 孙永
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-17
Filing date: 1998-06-17
Publication date: 1999-09-15
Anticipated expiration: 2008-06-17

Abstract

The utility model discloses a TV signal receiver, comprising an antenna, a hybrid circuit, an amplifying circuit and a receiving device. The utility model is characterized in that the utility model also comprises a V frequency range frequency bandwidth circuit, a U frequency range frequency bandwidth circuit, a V frequency range filter circuit and a U frequency range filter circuit. The utility model can separate signals of the V frequency range and the U frequency range singly and respectively filter waves in a frequency range separation way. The utility model can filter and eliminate all other signals of the TV signals of the frequency range. Therefore, the utility model can inhibit the ambient strong signals, avoid saturation of the amplifying circuit and cross modulation generation and improve the watching effect. The utility model has the advantages of simple structure, strong anti-interference capability and good watching effect. The utility model is especially suitable for areas having weaker TV signals.

Description

TV signal receiver

The utility model relates to signal receiving device, especially relates to a kind of TV signal receiver.The active antenna that present TV signal receiver mainly is made up of antenna and wide-band amplifier, it is that the TV signal that antenna receives is isolated V, U frequency band signals by wide-band amplifier, after amplifying, be transferred to receiving equipment again, but owing to V, U frequency band signals are separated together, be mingled with the extraneous signal that sends as fluorescent lamp, ballast, automobile, thunder and lightning etc. therein easily, disturbed by it easily makes amplifier saturated and produce cross (talk) and modulate, the various unnecessary stripeds that will superpose on TV set image influence view reception effect.

The purpose of this utility model is to provide a kind of V, U frequency band signals is carried out frequency-division section filtering respectively, can suppress the TV signal receiver that extraneous strong signal disturbs, view reception effect is good.

The purpose of this utility model is achieved in that the utility model comprises antenna, hybrid circuit, amplifying circuit and receiving equipment, feature is that the signal that antenna receives is sent into V respectively, U band bandwidth circuit is selected V, U frequency band signals, send into V, U frequency range filter circuit filtering external interference signal more respectively, then V, U frequency band signals are sent into hybrid circuit and mixed, after amplifying circuit amplifies, be transferred to receiving equipment.

The utility model is because design has V, U band bandwidth circuit and V, U frequency range filter circuit, just the signal of V, U frequency range can be separated separately, carry out frequency-division section filtering respectively, all other all signals except that this band TV signal of filtering, just can suppress extraneous strong signal, in order to avoid amplifying circuit is saturated and produce the cross (talk) modulation, therefore improved view reception effect greatly.The utlity model has advantage simple in structure, that antijamming capability is strong, view reception effect is good, be specially adapted to the more weak area of TV signal.

The utility model comprises antenna, hybrid circuit, amplifying circuit and receiving equipment, it is characterized in that: it also comprises V, U band bandwidth circuit and V, U frequency range filter circuit, the V-band bandwidth circuit is made up of capacitor C 3, C4, C5, inductance L 3, L4, capacitor C 3, C4, C5 are cascaded successively, another termination V-band antenna of capacitor C 3, another termination V-band filter circuit of capacitor C 5, inductance L 3 is serially connected between the public point and ground of capacitor C 3, C4, and inductance L 4 is serially connected between the public point and ground of capacitor C 4, C5; The U band bandwidth is made up of capacitor C 6, C7, C8, inductance L 5, L6, capacitor C 6, C7, C8 are cascaded successively, another termination U band antenna of capacitor C 6, another termination U frequency range filter circuit of capacitor C 8, inductance L 5 is serially connected between the public point and ground of capacitor C 6, C7, and inductance L 6 is serially connected between the public point and ground of capacitor C 7, C8.(V, U band bandwidth circuit are as shown in Figure 4)

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is the circuit theory diagrams of parallel resonance formula filter circuit.

Fig. 3 is the circuit theory diagrams of serial-resonant filter circuit.

Fig. 4 is the circuit theory diagrams of V, U band bandwidth circuit.

Circuit block diagram of the present utility model shown in Figure 1 is described as follows:

The utility model is by V-band antenna, U band antenna, V-band bandwidth circuit, U frequency range band Stretch circuit, V-band filter circuit, U frequency range filter circuit, hybrid circuit, amplifying circuit, reception Equipment forms. Antenna is sent the signal that receives into respectively V-band bandwidth circuit, U band bandwidth electricity V-band signal and U frequency band signals are selected respectively in the road, send into respectively V-band filter circuit, U frequently again All other all interfering signals except V-band, U band TV signal of section filter circuit filtering; The TV signal of V-band, U frequency range is sent into amplifying circuit again after hybrid circuit mixes, through amplifying electricity The TV signal that amplify on the road is transferred to receiving equipment again.

The circuit theory diagrams of parallel resonance formula filter circuit shown in Figure 2 are described as follows:

Parallel resonance formula filter circuit of the present utility model, it is by four groups of identical filter blocks of connecting successively 1 forms, and every group of filter block 1 composes in parallel first group by an inductance L 1, a variable capacitance C1 The front end of inductance L 1-1 in the filter block 1 connects respectively V, U band bandwidth circuit, the 4th group of filter block The end of inductance L 1-4 in 1 connects respectively hybrid circuit. All remove V-band, U frequency range its energy filtering Other all external interference signals beyond the TV signal.

The circuit theory diagrams of serial-resonant filter circuit shown in Figure 3 are described as follows:

Serial-resonant filter circuit of the present utility model, it is made up of four groups of identical filter blocks 2 in parallel successively, every group of filter block 2 is composed in series by an inductance L 2, a variable capacitance C2, the public point of inductance L 2-1, L2-2, L2-3, L2-4 connects V, U band bandwidth circuit and hybrid circuit respectively, and the common wall of capacitor C 2-1, C2-2, C2-3, C2-4 is put equal ground connection.

The 5th section in this specification is seen in the explanation of the circuit theory diagrams of V shown in Figure 4, U band bandwidth circuit.

Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further detail.

Embodiment 1:

The utility model is made up of V-band antenna, U band antenna, V-band bandwidth circuit, U band bandwidth circuit, V-band filter circuit, U frequency range filter circuit, hybrid circuit, amplifying circuit, receiving equipment.Antenna with the signal that receives send into the V-band bandwidth circuit respectively, U band bandwidth circuit is selected V-band signal and U frequency band signals respectively, sends into V-band filter circuit, all other all interference signals except that V-band, U band TV signal of U frequency range filter circuit filtering more respectively; The TV signal of V-band, U frequency range is sent into amplifying circuit again after hybrid circuit mixes, the TV signal of amplifying through amplifying circuit is transferred to receiving equipment again.

Filter circuit is a parallel resonance formula filter circuit, it is made up of four groups of identical filter blocks 1 of connecting successively, every group of filter block 1 composed in parallel by an inductance L 1, a variable capacitance C1, the front end of inductance L 1-1 in first group of filter block 1 connects V, U band bandwidth circuit respectively, and the end of the inductance L 1-4 in the 4th group of filter block 1 connects hybrid circuit respectively.It can all other all external interference signals except that V-band, U band TV signal of filtering.

The V-band bandwidth circuit is made up of capacitor C 3, C4, C5, inductance L 3, L4, wherein capacitor C 3, C4, C5 are cascaded successively, another termination V-band antenna of capacitor C 3, another termination V-band filter circuit of capacitor C 5, inductance L 3 is serially connected between the public point and ground of capacitor C 3, C4, inductance L 4 is serially connected between the public point and ground of C4, C5, and it can filter out the signal that belongs to V-band.

U band bandwidth circuit is made up of capacitor C 6, C7, C8, inductance L 5, L6, wherein capacitor C 6, C7, C8 are cascaded successively, another termination U band antenna of capacitor C 6, another termination U frequency range filter circuit of capacitor C 8, inductance L 5 is serially connected between the public point and ground of capacitor C 6, C7, inductance L 6 is serially connected between the public point and ground of capacitor C 7, C8, and it can filter out the signal that belongs to the U frequency range.

V-band bandwidth circuit, U band bandwidth circuit, V-band filter circuit, U frequency range filter circuit, hybrid circuit, amplifying circuit all need to shield with shielding device.

Embodiment 2:

Antenna, V-band bandwidth circuit, U band bandwidth circuit, hybrid circuit, amplifying circuit, receiving equipment are identical with embodiment 1.

Filter circuit is the serial-resonant filter circuit, it is made up of four groups of identical filter blocks 2 in parallel successively, every group of filter block 2 is composed in series by an inductance L 2, a variable capacitance C2, the public point of inductance L 2-1, L2-2, L2-3, L2-4 connects V, U band bandwidth circuit and hybrid circuit respectively, the equal ground connection of the public point of capacitor C 2-1, C2-2, C2-3, C2-4.

Claims

1, a kind of TV signal receiver, comprise antenna, hybrid circuit, amplifying circuit and receiving equipment, it is characterized in that: it also comprises V, U band bandwidth circuit and V, U frequency range filter circuit, wherein the V-band bandwidth circuit is by electric capacity (C3), (C4), (C5), inductance (L3), (L4) form, electric capacity (C3), (C4), (C5) be cascaded successively, another termination V-band antenna of electric capacity (C3), another termination V-band filter circuit of electric capacity (C5), inductance (L3) is serially connected in electric capacity (C3), (C4) between the public point and ground, inductance (L4) is serially connected in electric capacity (C4), (C5) between the public point and ground; The U band bandwidth is made up of electric capacity (C6), (C7), (C8), inductance (L5), (L6), electric capacity (C6), (C7), (C8) are cascaded successively, another termination U band antenna of electric capacity (C6), another termination U frequency range filter circuit of electric capacity (C8), inductance (L5) is serially connected between the public point and ground of electric capacity (C6), (C7), and inductance (L6) is serially connected between the public point and ground of electric capacity (C7), (C8).

2, a kind of TV signal receiver as claimed in claim 1, it is characterized in that: described filter circuit is a parallel resonance formula filter circuit, it is made up of the identical filter block (1) of connecting successively more than two groups or two groups, every group of filter block (1) composed in parallel by an inductance (L1), a variable capacitance (C1), the front end of the inductance (L1-1) in first group of filter block (1) connects V, U band bandwidth circuit respectively, and the end of the inductance (L1-n) in n group (n 〉=2) filter blocks (1) is hybrid circuit respectively.

3, a kind of TV signal receiver as claimed in claim 1, it is characterized in that: described filter circuit is the serial-resonant filter circuit, it is made up of identical filter block in parallel successively (2) more than two groups or two groups, every group of filter block (2) is by an inductance (L2), a variable capacitance (C2) is composed in series, inductance (L2-1) in the filter block (2), (L2-2), ..., (L2-n) common port of (n 〉=2) meets V respectively, U band bandwidth circuit and hybrid circuit, the electric capacity (C2-1) in the filter block (2), (C2-2), ..., (C2-n) the equal ground connection of common port of (n 〉=2).