KR200222882Y1 - A rf signal distribution appratus - Google Patents

Abstract

The present invention receives a high frequency signal received from an antenna by a TV broadcasting signal input unit, filters high frequency noise, blocks low frequencies, bypasses high frequencies, and transmits a cable signal transmitted from a cable broadcasting station by a wire cable signal input unit. The TV broadcast signal and the wired cable signal inputted through the TV broadcast signal input unit by a switching unit which performs impedance matching, filters harmonic noise, distributes it at a constant rate, and is switched by a control signal output from the controller. Selecting at least one signal from a wired cable signal input through an input unit, filtering a low frequency signal included in a signal selected by the switching means from a high frequency signal output unit, and outputting the low frequency signal to an external device; The above clause is controlled by a control signal output from the controller. Blocking the low frequency signal included in the selected signal according to the operation of the means and bypassing the high frequency signal, receiving the high frequency signal output from the coupling means by the amplifying means and amplifying it to a predetermined level, and the amplifying means by the distribution means. The means is configured to distribute the high frequency signal amplified to a certain level to the PIP tuner and the main tuner, so that the present invention outputs one RF signal of one of the two input signals and simultaneously amplifies the RF signal. It can be divided into two outputs, and it can also distribute high frequency signals in both directions.

Description

High Frequency Signal Distribution Device {A RF SIGNAL DISTRIBUTION APPRATUS}

The present invention relates to a high frequency signal distribution device capable of receiving a high frequency signal using one antenna and supplying an RF signal (radio frequency signal) to a plurality of TV sets or VCRs. The present invention relates to a high frequency signal distribution device capable of simultaneously outputting a signal in one loop and amplifying the signal into two outputs to distribute the signal in both directions.

In general, a high frequency signal distribution apparatus is disclosed in the publication of the Republic of Korea Utility Model Registration No. 0101018 (registration date November 18, 1998). In the high frequency signal distribution device 20 disclosed in the publication, as illustrated in FIG. 1, one RF input terminal 11 and two or more RF output terminals 12-14 are provided outside, and an RF input is provided. A balun 15-18 for impedance matching is provided between the terminal 12 and each of the RF output terminals 12-14, and shields an antenna sphere signal propagated from each TV set. At the same time, at the rear end of the first balun 15 connected to the RF input terminal 11 to amplify the RF signal received from the antenna to a predetermined level and output it to the first to third RF output terminals 12-14. An RF amplifier 19 for signal amplification is provided.

The high frequency signal distribution device 20 configured as described above matches an impedance of the antenna (RF) signal coming into the RF input terminal 11 through the antenna in the first balun 15 and uniformly sets the high frequency signal in the RF amplifier 19. Amplify to level. RF signals amplified to a predetermined level by the RF amplifier 19 are impedance-matched (matched) through the second to fourth baluns 16, 17, and 18, respectively, and then the first to third RF outputs. Output to terminals 12, 13 and 14.

However, since the high frequency signal distribution device 20 configured as described above has an antenna signal of sufficient size to be stably supplied to a TV set or a VCR connected to the first to third RF output terminals 12-14 of the RF splitter 20. Can output to more than 2 TVs, STBs, PDPs, so you can watch good TV broadcasts through more than 2 TVs, STBs, PDPs, but there is only one RF input terminal 11, so you can use two or more TVs simultaneously There was a problem in that it could not be distributed to STBs and PDPs.

Accordingly, the present invention has been made to solve the above various problems, and an object of the present invention is to output one RF signal of one of two input signals and simultaneously amplify the RF signal and divide the signal into two outputs. It is to provide a high frequency signal distribution device.

Another object of the present invention is to provide a high frequency signal distribution apparatus capable of distributing a high frequency signal in both directions.

In order to achieve the above object, the high frequency signal distribution device according to the present invention receives a high frequency signal received from an antenna and at the same time filters high frequency noise, cuts low frequency and bypasses the high frequency TV broadcasting signal input unit, and a cable broadcasting station A wired cable signal input unit for receiving a wired cable signal transmitted from a wire and performing impedance matching, filtering and distributing harmonic noise at a predetermined ratio, and a TV broadcast signal inputted through the TV broadcast signal input unit and a wired cable signal input unit. Switching means for switching to select at least one of the wired cable signals, a high frequency signal output unit including an induction coil for filtering low frequency signals included in the signal selected by the switching means and outputting them to an external device; A control unit for controlling the switching operation of the means; A control means output from the controller and a coupling means for cutting off the low frequency signal included in the signal selected according to the operation of the switching means and bypassing the high frequency signal, and receiving the high frequency signal output from the coupling means. Amplification means for amplifying to a level; a distribution means for distributing and outputting a high frequency signal amplified to a predetermined level by the amplification means to a PIP tuner and a main tuner; and filtering the noise contained in a DC power supply of a predetermined level. And a noise filter applied to the filter.

1 is a block diagram schematically showing a conventional high frequency signal distribution device;

Figure 2 is a block diagram schematically showing a high frequency signal distribution apparatus according to an embodiment of the present invention,

3 is a detailed circuit diagram of a high frequency signal distribution apparatus according to an embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

101: antenna 110: TV broadcast signal input unit

111: LC filter 120: Wired cable signal input unit

130: switching means 140: high frequency signal output unit

150: control unit 160: coupling means

170: amplification means 171: resonance circuit

172: noise filter 180: distribution means

Hereinafter, a high frequency signal distribution device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a block diagram schematically showing a high frequency signal distribution apparatus according to an embodiment of the present invention, Figure 3 is a detailed circuit diagram of a high frequency signal distribution apparatus according to an embodiment of the present invention.

2 and 3, the high frequency signal distribution device according to the present invention receives a high frequency signal received from an antenna 101, filters high frequency noise, simultaneously cuts low frequencies and bypasses high frequencies. A broadcast signal input unit 110, a wired cable signal input unit 120 for receiving a wired cable signal transmitted from a wired broadcasting station, matching impedance, filtering harmonic noise, and distributing it at a predetermined ratio, and the TV broadcast signal input unit 110. A switching means (130) comprising a relay (RY401) to select at least one signal from a TV broadcast signal input through the wired cable signal and the wired cable signal input unit 120, and the switching means 130; Induction coil L1 to filter out low frequency signals included in the signal selected by P and output them to external equipment (for example, other TVs, STBs, PDPs) 02) the high frequency signal output unit 140, the control unit 150 for controlling the switching operation of the switching means 130, and the control signal output from the control unit 150 of the switching means 130 A coupling means 160 made of a capacitor C104 and a high frequency signal output from the coupling means 160 to block a low frequency signal included in the selected signal according to the operation and bypass the high frequency signal. And an amplifying means 170 for amplifying the signal, and a distributing means 180 for distributing and outputting a high frequency signal amplified by the amplifying means 170 to a PIP (Picture In Picture) tuner and a main tuner.

The TV broadcast signal input unit 110 receives an high frequency signal received from the antenna 101, an LC filter 111 including an induction coil L105 and a capacitor C108 for filtering high frequency noise, and the LC filter 111. Induction coil (L106) for re-filtering the noise contained in the high frequency signal from which the high frequency noise is filtered, and the low frequency contained in the high frequency signal from which the noise is filtered in the induction coil (L106) and bypasses the high frequency It consists of a coupling capacitor C109.

The wired cable signal input unit 120 receives a wired cable signal transmitted from a wired broadcasting station, matches a impedance, and distributes the wired cable signal at a constant ratio, and the first distribution transformer T101. Capacitors C101 and C103 for filtering harmonic noise included in a high frequency signal distributed at a constant ratio, and high frequency signals filtered with harmonic noise from the capacitors C101 and C103 are distributed at a constant ratio 1: 1. 2nd distribution transformer T102 and distribution resistor R101.

The control unit 150 for controlling the switching operation of the switching means 130 is a switch (SW) for intermitting the application of a DC power of a predetermined level (+ 5V), and the control unit 150 when switching on the switch (SW) ) Is a capacitor (C401, C402) connected in parallel to each other to filter the noise included in the DC power supply, and when the bias voltage filtered noise from the capacitor (C401, C402) is applied through a bias resistor (R401) Are connected in parallel to each other so as to filter out noise contained in a DC power supply of a predetermined level (+ 9V) at the time of switching on the transistor Q401 so as to operate the switching means 130. The capacitors C404 and C406, the output resistor R404 connected to both ends of the capacitors C404 and C406, and the relay coil LY1 of the switching means 130 in parallel to the transistor Q401. Reverse current flow to collector terminal of At the same time, the diode D401 for preventing the flow of reverse current to the relay coil LY1 of the switching means 130, and one side is connected to the anode side of the diode D401, the other end is grounded The capacitor C403 is configured to filter out noise included in the current flowing through the relay coil LY1 of the switching means 130.

The amplifying unit 170 receives a high frequency signal output from the coupling unit 160 and filters the noise, and a high frequency signal from which the noise is filtered by the capacitor C113 to bias resistors R104 and R105. Transistor Q101 that is amplified to a predetermined level, a capacitor C106 having one side connected to an emitter end of the transistor Q101 to stabilize the operation of the transistor Q101, and the capacitor C106. Output resistor R106 connected in parallel to one side of the emitter terminal of the transistor Q101 and a high frequency signal from which noise is filtered by the capacitor C113 through bias resistors R104 and R105 to receive noise. One side is connected to a resonant circuit 171 consisting of a resistor R103 and a capacitor C105 and a branch power supply line of a constant level (+ 9V) so as to be frequency-resonated so as to be included in the power supply voltage. A noise filter 172 made of an induction coil L103 coupled to the resistors R102 and R110 and the resistor R110 in parallel with the other end thereof and coupled to the collector terminal of the transistor Q101 to filter out the amount; One side is connected to the collector terminal of the transistor Q101 to block the low frequency contained in the high frequency signal amplified by the transistor Q101, and to bypass the high frequency coupling capacitor C107 and the coupling capacitor C107. It consists of the capacitor C115 which filters the noise contained in the high frequency which passed).

The distributing means 180 receives a signal in which the noise included in the high frequency signal is filtered by the capacitor C115 of the amplifying means 170 and distributes the signal at a constant rate, and parallel to the transformer T103. Distributed resistors R107 connected in series and balanced resistors R205 and R202 for outputting a high frequency signal to the PIP tuner and the main tuner while maintaining a balanced connection in series with both ends of the distribution resistor R107. It consists of.

In FIG. 3, D101 is a protection diode for transistor Q101 that bypasses static electricity to ground to prevent static electricity from entering the base end of transistor Q101.

Next, the operation and effects of the high frequency signal distribution apparatus according to the embodiment of the present invention configured as described above will be described.

First, the LC filter 111 including the induction coil L105 and the capacitor C108 of the TV broadcast signal input unit 110 without the control unit 150 controlling the switching means 130 is an antenna 101. The high frequency signal is received from the received high frequency signal, and the high frequency noise is filtered, and the induction coil L106 filters the noise included in the high frequency signal filtered by the high frequency noise by the LC filter 111, and the coupling capacitor C109. Receiving a high frequency signal from which noise is filtered by the induction coil (L106), cutting off the low frequency included in the high frequency signal, and bypassing the high frequency to enable the movable contact (a) and the fixed contact (c) of the switching means 130. Through the coupling means 160 consisting of the coupling capacitor (C104) through the low frequency cut off, and outputs to the filter (C113) of the amplifying means (170).

In the filter C113 of the amplifying means 170, the low frequency is blocked by the coupling means 160 and only the high frequency signal is bypassed. The capacitor C113 bypasses the noise to ground and filters the capacitor. When the high frequency signal from which noise is filtered at C113 is applied to the base terminal of the transistor Q101 through the bias resistors R104 and R105, a bias voltage (+ 9V) is applied to the DC power supply of the transistor Q101. Noise is introduced through the noise filter 172 made of an induction coil L103 connected to the collector terminal of the transistor Q101 while the other end is connected to the resistors R102 and R110 and the resistor R110 in parallel. After filtering, the transistor is applied to the collector terminal of the transistor Q101, so that the transistor Q101 amplifies a high frequency signal to a predetermined level and outputs it to the collector terminal of the transistor Q101.

The amplified high frequency signal output to the collector terminal of the transistor Q101 blocks the low frequency included in the amplified high frequency signal from the coupling capacitor C107, bypasses the high frequency, and blocks the noise contained in the high frequency capacitor. The filter is filtered at C115 and output to the transformer T103 of the distribution unit 180.

In the resonant circuit 171 of the amplifying unit 170, the high frequency signals from which the noise is filtered by the capacitor C113 are received through the bias resistors R104 and R105 to perform frequency resonance to remove the noise.

In the transformer T103 of the distribution unit 180, the capacitor C115 of the amplifying unit 170 receives the amplified high frequency signal from which the noise is filtered, and distributes the same to the distribution resistor R107 at a predetermined ratio. Balance is maintained by the balance resistors R205 and R202 (R206 and R203) connected in series at both ends of R107 to distribute and output a high frequency signal to the PIP tuner and the main tuner.

On the other hand, the control unit 150 controls the switching means 130, that is, the switch SW of the control unit 150 is switched on to the noise contained in the DC power of a certain level (+ 5V) capacitor After filtering at C401 and C402, when a bias voltage is applied to the base terminal of the transistor Q401 through a bias resistor R401, the transistor Q401 is switched on to be included in a voltage of DC + 9V. As the noise is filtered in the capacitors C404 and C406 and a current flows through the relay coil LY1 of the switching means 130 through the resistor R404, the movable contact d of the switching means 130 becomes Falling from the stationary contact (c), the movable contact (b) is in contact with the stationary contact (a).

Accordingly, the first distribution transformer T101 of the wired cable signal input unit 120 receives a wired cable signal transmitted from a cable broadcasting station, matches impedance, distributes the signal at a constant rate, and distributes the first distribution transformer T101. The harmonic noise included in the high frequency signal distributed at a constant ratio is filtered by the capacitors C101 and C103, and the second distribution transformer T102 receives the high frequency signal from which the harmonic noise is filtered from the capacitors C101 and C103. And a predetermined ratio (1: 1) by the distribution resistor (R101) to output to an external device, for example, a plurality of other TVs, STBs, and PDPs through the induction coil (L102) of the high frequency signal output unit (140). At the same time, the cable signal transmitted from the cable broadcasting station is a low frequency signal from the coupling capacitor (C104) of the coupling means 160 through the fixed contact (a) and the movable contact (b) of the switching means (130) As described above, the high-frequency signal is bypassed to amplify and output the cable signal transmitted from the cable broadcasting station to the distribution unit 180. The distribution unit 180 distributes the high-frequency signal at a specific ratio to PIP. Outputs video signals to the tuner and main tuner.

In the above description, although illustrated and described with reference to specific embodiments, the present invention is not limited to this, for example, by those of ordinary skill in the art without departing from the concept of the present invention Of course, the design can be changed in various ways.

As described above, according to the high frequency signal distribution device according to the present invention, the TV broadcast signal input unit receives a high frequency signal received from an antenna, filters high frequency noise, blocks low frequency, bypasses high frequency, and wires a cable signal. The input unit receives a wired cable signal transmitted from a cable broadcasting station, matches impedance, filters harmonic noise, distributes the signal at a constant rate, and is input through the TV broadcasting signal input unit by a switching means by a control signal output from the controller. Selecting at least one signal from among a broadcast signal and a wire cable signal input through a wire cable signal input unit, filtering a low frequency signal included in a signal selected by the switching means from a high frequency signal output unit, and outputting the filtered low frequency signal to an external device; Said control by coupling means The control signal output from the block cuts out the low frequency signal included in the signal selected according to the operation of the switching means, bypasses the high frequency signal, receives the high frequency signal output from the coupling means by the amplifying means, and receives a predetermined level. And a high frequency signal amplified by the distribution means to the PIP tuner and the main tuner and outputted to the PIP tuner and the main tuner. In addition, the RF signal can be amplified and distributed to two outputs, and the high frequency signal can be distributed in both directions.

Claims (6)

Receives a high frequency signal received from the antenna 101 to filter high frequency noise, and at the same time receives a TV broadcast signal input unit 110 for blocking low frequencies and bypassing high frequencies, and a wired cable signal transmitted from a cable broadcasting station to match impedance. At the same time, the wired cable signal input unit 120 for filtering and distributing harmonic noise at a predetermined ratio, and is input through the TV broadcast signal inputted through the TV broadcast signal input unit 110 and the wired cable signal input unit 120. Switching means 130 for selecting any one of the wired cable signal, and the induction coil (L102) to filter out the low-frequency signals included in the wired cable signal selected by the switching means 130 to the external device The high frequency signal output unit 140, the control unit 150 for controlling the switching operation of the switching means 130, and is output from the control unit 150 Coupling means 160 for blocking the low frequency signal included in the TV broadcast signal selected according to the operation of the switching means 130 by the fish signal and bypasses the high frequency signal, and outputs from the coupling means 160 Amplifying means (170) for receiving a high frequency signal to be amplified to a predetermined level, and distributing means (180) for distributing and outputting a high frequency signal amplified by the amplifying means (170) to a PIP tuner and a main tuner; High frequency signal distribution apparatus characterized in that there is. According to claim 1, wherein the TV broadcast signal input unit 110 receives the high frequency signal received from the antenna 101 and the LC filter 111 consisting of an induction coil (L105) and a capacitor (C108) for filtering the high frequency noise; Induction coil (L106) for re-filtering the noise contained in the high-frequency signal filtered high-frequency noise in the LC filter 111, and the low frequency included in the high-frequency signal filtered noise in the induction coil (L106) A high frequency signal distribution device comprising: a coupling capacitor (C109) for blocking and bypassing high frequency. According to claim 1, wherein the wired cable signal input unit 120 receives a wired cable signal transmitted from a cable broadcasting station, the first matching transformer (T101) for matching the impedance and at a predetermined ratio and the first distribution transformer, and the first Capacitors C101 and C103 for filtering harmonic noise included in a high frequency signal distributed at a constant ratio by the distribution transformer T101, and a high frequency signal filtered with harmonic noise at the capacitors C101 and C103. A high frequency signal distribution device comprising: a second distribution transformer (T102) and a distribution resistor (R101) for distribution by (1: 1). According to claim 1, wherein the control unit 150 for controlling the switching operation of the switching means 130 is a switch (SW) for intermitting the application of a DC power of a predetermined level (+ 5V) and the switching of the switch (SW) When turned on, the controller 150 includes capacitors C401 and C402 connected in parallel with each other to filter noise included in a DC power source, and a bias voltage from which noise is filtered by the capacitors C401 and C402 is a bias resistor R401. Transistors Q401 that are switched on when they are applied through the?) And noise included in a DC power source having a predetermined level (+ 9V) at the time of switching on the transistor Q401 to operate the switching means 130. The capacitors C404 and C406 connected in parallel to each other for filtering, the output resistor R404 connected to both ends of the capacitors C404 and C406, and the relay coil LY1 of the switching means 130 in parallel. Collector terminal of the transistor Q401 At the same time to prevent the flow of reverse current, the diode D401 for preventing the flow of reverse current to the relay coil LY1 of the switching means 130, one side is connected to the anode side of the diode D401, And a capacitor (C403) for filtering the noise contained in the current flowing through the relay coil (LY1) of the switching means (130), the other end of which is grounded. The method of claim 1, wherein the amplifying means 170 is a capacitor (C113) for filtering the noise by receiving a high frequency signal output from the coupling means 160, and the high frequency signal from which noise is filtered in the capacitor (C113) A transistor Q101 received through the bias resistors R104 and R105 and amplified to a predetermined level, and a capacitor C106 having one side connected to an emitter terminal of the transistor Q101 to stabilize the operation of the transistor Q101; The output resistor R106 connected in parallel to the capacitor C106 and connected at one side to the emitter terminal of the transistor Q101, and the high frequency signal from which the noise is filtered at the capacitor C113 are bias resistors R104 and R105. One side is connected to a resonant circuit 171 consisting of a resistor R103 and a capacitor C105 and a branch power supply line of a constant level (+ 9V) so as to frequency-resonate to receive noise through the Noise filter 172, which is in contact with resistors R102 and R110 and the resistor R110 in parallel to filter the noise contained therein, and is formed of an induction coil L103, the other end of which is coupled to the collector terminal of the transistor Q101. And a coupling capacitor (C107) connected at one side to the collector terminal of the transistor (Q101) to block the low frequency contained in the high frequency signal amplified by the transistor (Q101) and bypass the high frequency. A high frequency signal distribution device comprising a capacitor (C115) for filtering out noise contained in a high frequency passing through a capacitor (C107). The transformer (T103) of claim 1, wherein the distribution means 180 receives a signal from which the noise included in the high frequency signal is filtered by the capacitor C115 of the amplifying means 170, and distributes the signal at a predetermined ratio. Distribution resistors R107 connected in parallel to the transformer T103 and balance resistors R205 and R202 connected in series with both ends of the distribution resistor R107 to maintain a balance and output a high frequency signal to the PIP tuner and the main tuner. And (R206, R203).