JP2011044829A - Connector and window glass for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small connector which responds to temperature change of a vehicle and window glass for the vehicle, and to provide the window glass for the vehicle. <P>SOLUTION: In the connector which is fixed to the window glass for the vehicle and connected to an antenna conductor provided on the window glass for the vehicle, the connector has: an amplifier circuit which amplifies and outputs a received signal received by the antenna conductor; a connection terminal which electrically connects the amplifier circuit with the antenna conductor; and a signal output terminal which outputs the received signal output from the amplifier circuit to communication equipment loaded on the vehicle. The amplifier circuit has: a power supply circuit which separates power supply voltage, which is supplied from the communication equipment via the signal output terminal, from the received signal; and an amplification means, to which the power supply voltage separated by the power supply circuit is supplied. The amplification means has: a transistor which amplifies the received signal; and a voltage clamp circuit which clamps voltage of a base of the transistor by predetermined potential. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a connector fixed to a vehicle window glass and connected to an antenna formed on the vehicle window glass, and a vehicle window glass mounted with the connector.

  In recent vehicles, a tuner unit or the like, which is a communication device that receives digital television broadcasting, in addition to FM broadcasting and AM broadcasting, is mounted. Such a vehicle window glass is generally provided with a glass antenna formed by printing a conductive paste or the like on the window glass.

  The glass antenna is connected to a tuner unit or the like in the vehicle by a dedicated connector incorporating an electric circuit such as an amplifier circuit. The connector is held by a holding member or the like fixed to the vehicle window glass and attached to the vehicle window glass.

  The connector fixed to the vehicle window glass is required to be durable enough to withstand various changes in the external environment of the vehicle. For example, the connector needs to be fixed to the vehicle window glass with a strength that can withstand vibrations and the like when the vehicle travels. The connector case or the like needs to be designed so as to avoid poor conduction due to moisture penetration. The electrical circuit built in the connector needs to be designed to cope with temperature changes of the vehicle and the window glass for the vehicle due to temperature changes outside the vehicle. Moreover, it is preferable that the connector fixed to the window glass for vehicles is small if the external appearance of a vehicle is considered.

  In the conventional connector, various ideas have been made to satisfy the above-described requirements. For example, in Patent Document 1, in an electrical connection device connected to a conductor formed on a glass plate by fitting an electrode terminal joined to a conductor formed on a window glass and an electrode gripping fitting, It is described that when the apparatus is mounted on a glass plate, a gap is provided between the housing and the glass plate, and the evaporation of moisture is promoted by the flow of air. Further, Patent Document 2 describes a circuit board built-in connector and a catch that can be miniaturized and have high cable disconnection strength.

JP-A-2005-243660 JP 2008-35479 A

  However, in the above-described conventional technology, it is difficult to design the electrical circuit built in the connector so as to cope with the temperature change of the vehicle or the window glass for the vehicle and to reduce the size of the connector for the following reasons.

  In order to reduce the size of the connector, it is necessary to mount the electric circuits built in the connector densely on the board. When the electrical circuits are densely mounted, the temperature of the substrate rises due to heat generation of the electrical circuits. When the temperature of the vehicle or the vehicle window glass rises in this state, the temperature of the substrate further rises, and the possibility that the electric circuit is damaged increases.

  Further, when the power supply voltage of the electric circuit is supplied from a tuner unit or the like, the height of the supplied voltage differs depending on the specifications of the tuner unit or the like. When a voltage higher than necessary is supplied, the heat generated in the electric circuit is further increased, and the possibility that the electric circuit is damaged is further increased. Therefore, in order to suppress the heat generation of the electric circuit, it is necessary to consider the specifications of a tuner unit that supplies a power supply voltage.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a connector that is small in size and can cope with temperature changes in vehicles and vehicle window glass.

  The present invention employs the following configuration in order to achieve the above object.

  The present invention is a connector fixed to a vehicle window glass and connected to an antenna conductor provided on the vehicle window glass, wherein the connector amplifies and outputs a received signal received by the antenna conductor. An amplifier circuit; a connection terminal for electrically connecting the amplifier circuit and the antenna conductor; and a signal output terminal for outputting the reception signal output from the amplifier circuit to a communication device mounted on a vehicle. The amplifier circuit includes a power supply circuit that separates the power supply voltage supplied from the communication device via the signal output terminal and the received signal, and an amplification that is supplied with the power supply voltage separated by the power supply circuit. And amplifying means for fixing the voltage of the transistor for amplifying the received signal and a base voltage of the transistor to a predetermined constant voltage. To provide a connector which is characterized by having a a circuit.

  In the connector according to the present invention, the amplifier circuit may include a first impedance matching circuit connected between the input terminal of the amplifying means connected to the base of the transistor and the connection terminal. good.

  In the connector according to the present invention, the amplifier circuit may include a second impedance matching circuit connected between the output terminal of the amplifying means connected to the collector of the transistor and the signal output terminal. good.

  In the connector according to the present invention, the amplifier circuit may have a case covering the periphery, and the case may be filled with resin.

  Moreover, the connector of this invention WHEREIN: The said signal output terminal is good also as a structure which has a cable insertion part which can be attached or detached with the communication cable connected to the said communication apparatus.

  The present invention provides a vehicle window glass including an antenna conductor and a connector connected to the antenna conductor, wherein the connector amplifies and outputs a received signal received by the antenna conductor; and the antenna A connection terminal for electrically connecting a conductor and the amplifier circuit; and a signal output terminal for outputting the reception signal output from the amplifier circuit to a communication device mounted on a vehicle, the amplifier circuit comprising: A power supply circuit that separates the power supply voltage supplied from the communication device via the signal output terminal and the received signal, and an amplifying unit that is supplied with the power supply voltage separated by the power supply circuit. The amplifying means includes a transistor that amplifies the received signal, and a voltage fixing circuit that fixes a voltage at a base of the transistor to a predetermined constant voltage. Providing a window glass for a vehicle according to claim Rukoto.

  In the vehicle window glass according to the present invention, the amplifier circuit includes a first impedance matching circuit connected between the input terminal of the amplifying means connected to the base of the transistor and the connection terminal. It is good also as a structure.

  In the vehicle window glass of the present invention, the amplifier circuit includes a second impedance matching circuit connected between the output terminal of the amplifier circuit connected to the collector of the transistor and the signal output terminal. It is good also as a structure to have.

  In the vehicle window glass of the present invention, the connector may have a case in which the amplification means is built, and the case may be filled with resin.

  Moreover, the vehicle window glass of this invention WHEREIN: The said signal output terminal is good also as a structure which has a cable insertion part which can be attached or detached with the communication cable connected to the said communication apparatus.

  ADVANTAGE OF THE INVENTION According to this invention, the connector which can respond to the temperature change of a vehicle and a vehicle window glass can be provided.

1 is a perspective view of a connector 10 of the present invention. It is AA sectional drawing of the connector 10 of this invention. 2 is a diagram illustrating an amplifier circuit 30 mounted on a substrate 20. FIG. 2 is a circuit diagram showing a television amplifier 40 built in the connector 10. FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  The connector of this embodiment has a voltage fixing circuit that keeps the power supply voltage supplied from the communication device in the vehicle constant. That is, the voltage fixing circuit of the present embodiment fixes the base and emitter voltages of a transistor Q42 used in the TV amplifier 40 described later, regardless of changes in the power supply voltage supplied from the communication device.

  The present embodiment described below is a glass antenna formed by a tuner unit for digital television, which is one of communication devices mounted on a vehicle, and a conductor printed on a vehicle window glass G (see FIG. 1). This is a form in which the present invention is applied to a connector for connecting to (hereinafter referred to as an antenna). The antenna conductor includes linear conductors 16a and 16b (see FIG. 1) for receiving radio waves, and two quadrangular power feeding portions 15a and 15b (see FIG. 1) for extracting current excited in the antenna conductor. Yes.

  The connector of the present invention is characterized by the shape of the connector and the electric circuit built in the connector. The connector of this invention implement | achieves the connector which has durability which can respond to the temperature change of a vehicle or a window glass for vehicles by the structure which has these characteristics together.

  First, the shape of the connector of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a connector 10 according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of the connector 10 according to the present invention.

  The connector 10 includes a case 11, a cable insertion portion 12, and two connection terminals 13a and 13b. The case 11 is provided with a substrate 20 on which an electric circuit described later is mounted. A cable for connecting the tuner unit mounted in the vehicle and the connector 10 is inserted into the cable insertion portion 12. The connection terminals 13a and 13b are formed of a conductor, and are electrically connected to the two power supply portions 15a and 15b of the antenna conductor provided on the vehicle window glass G by solder or conductive adhesive (not shown). Connected. As a result, the connector 10 is electrically connected to the antenna conductor and fixed to the vehicle window glass G.

  In the power supply unit of this embodiment, a linear conductor 16a (hereinafter referred to as main element 16a) is connected to one power supply unit 15a, and a linear conductor 16b (hereinafter referred to as adjustment element 16b) is connected to the other power supply unit 15b. ) Is connected. In FIG. 1, the connection terminal 13a is connected to the power supply part 15a to which the main element 16a is connected, and the connection terminal 13b is connected to the power supply part 15b to which the adjustment element 16b is connected by solder. The connection terminal in the claims refers to the connection terminal 13a. The connection terminal 13 b of this embodiment is connected to the ground of the substrate 20. The antenna conductor connected to the connection terminal 13b is mainly used as an adjustment line for adjusting antenna characteristics.

  The case 11 of this embodiment is formed of, for example, plastic. As shown in FIG. 2, the inside of the case 11 is sealed by filling the case 11 with a filler 14 made of resin or the like. The cable insertion part 12 has at least a signal output terminal (not shown) connected to the cable and an output terminal of an electric circuit mounted on the board 20. In the present embodiment, when a cable is inserted into the cable insertion portion 12, the output signal of the electric circuit is output to the tuner unit via this signal output terminal.

  The connection terminals 13 a and 13 b of the present embodiment are electrically connected to an electric circuit mounted on the substrate 20 in the case 11. The connection terminals 13a and 13b are disposed so as to be in contact with the antenna conductor feeding portions 15a and 15b formed on the vehicle window glass G, and are directly fixed by soldering or the like. In the connector 10 of the present embodiment, the connection terminals 13a and 13b are fixed so as to be in contact with the feeding portions 15a and 15b of the antenna conductor, whereby the electric circuit mounted on the substrate 20 and the antenna conductor are electrically connected. The

  In the present embodiment, the inside of the case 11 is filled with the filler 14 and sealed, so that the strength of the case 11 can be improved and the penetration of moisture and the like into the case 11 can be prevented. Furthermore, in this embodiment, since the resin is filled in the case 11, the flow of solder on the substrate 20 that occurs when the connection terminals 13a and 13b are fixed to the vehicle window glass G by soldering is prevented. Can do.

  Moreover, since the connector 10 of this embodiment is directly fixed to the window glass for vehicles with solder, the connector 10 can be firmly fixed to the window glass G for vehicles. In addition, the connector 10 of the present embodiment does not require a holding member for fixing the connector 10 to the vehicle window glass G, a detachable member that makes the connector 10 detachable from the vehicle window glass G, or the like. For this reason, the connector 10 of this embodiment can be reduced in size compared with the conventional connector.

  Next, an electric circuit on which the substrate 20 of this embodiment is mounted will be described with reference to FIG. An amplifier circuit 30 that amplifies and outputs a reception signal received from the antenna is mounted on the substrate 20 of the present embodiment. FIG. 3 is a diagram illustrating the amplifier circuit 30 mounted on the substrate 20.

  The amplifier circuit 30 includes a first impedance matching circuit 31, a second impedance matching circuit 32, a power supply circuit 33, and a television amplifier 40.

  The input terminal Tin of the first impedance matching circuit 31 is connected to the main element 16a of the antenna conductor provided on the vehicle window glass G via the connection terminal 13a. A television amplifier 40 is connected to the subsequent stage of the first impedance matching circuit 31. A second impedance matching circuit 32 and a power supply circuit 33 are connected in parallel at the subsequent stage of the television amplifier 40. The output of the second impedance matching circuit 32 is connected to the signal output terminal Tout.

  The reception signal received from the main element 16a is input from the input terminal Tin via the connection terminal 13a, and is supplied to the television amplifier 40 through the first impedance matching circuit 31. The received signal is amplified by the television amplifier 40 and is output from the signal output terminal Tout to the tuner unit through the second impedance matching circuit 32.

  The connection terminal 13b is connected to the ground by an electric circuit mounted on the substrate 20. The reception sensitivity of the antenna can be adjusted by connecting the ground of the electric circuit and the adjustment element 16b. If sufficient reception sensitivity can be obtained, the system from the adjustment element 16b to the connection terminal 13b may not be provided.

  The amplifier circuit 30 of the present embodiment employs a phantom power feeding method. The phantom power supply method is a method in which a power supply voltage is added to a signal line. That is, the power supply voltage fed from the tuner unit via the signal output terminal Tout is supplied to the amplifier circuit 30 of the present embodiment. The power supply voltage input from the signal output terminal Tout is separated from the received signal by the power supply circuit 33 and supplied to the television amplifier 40. In the present embodiment, by adopting the phantom power feeding method, the power supply voltage that has passed through the regulator is supplied in the tuner unit, so that the number of components of the power supply circuit 33 can be reduced. Further, since it is not necessary to provide a power supply terminal in the cable insertion portion 12, it is possible to contribute to the miniaturization of the connector 10.

  Below, each circuit which comprises the amplifier circuit 30 is demonstrated.

  The first impedance matching circuit 31 matches the impedance of the antenna pattern formed on the vehicle window glass G and the impedance of the television amplifier 40. The second impedance matching circuit 32 performs matching between the impedance of the television amplifier 40 and the impedance of the tuner unit. The power supply circuit 33 separates the power supply voltage supplied from the tuner unit from the received signal and supplies it to the television amplifier 40.

  The television amplifier 40 of the present embodiment is an amplifying unit that operates with the power supply voltage supplied from the power supply circuit 33 and amplifies the received signal input through the first impedance matching circuit 31.

  Details of the television amplifier 40 of the present embodiment will be described below. FIG. 4 is a circuit diagram showing the television amplifier 40 built in the connector 10.

  When the power supply voltage is supplied by the phantom power supply method, the supplied power supply voltage depends on the specifications of the tuner unit. Therefore, conventionally, it has been necessary to design the TV amplifier in accordance with the specifications of the tuner unit, and the versatility is poor.

  Therefore, in this embodiment, a voltage fixing circuit 41 is provided in the television amplifier 40, and the television amplifier 40 is operated at a constant voltage regardless of the value of the power supply voltage supplied from the tuner unit.

  The television amplifier 40 of this embodiment includes an input terminal tin, an output terminal tout, a voltage fixing circuit 41, a transistor Q42, resistors R1, R2, R3, a capacitor C1, and coils L1, L2.

  The input terminal tin of the television amplifier 40 in FIG. 4 is connected to the output of the first impedance matching circuit 31 shown in FIG. 3 and receives a reception signal from the antenna. The output terminal tout of the TV amplifier 40 in FIG. 4 is connected to the collector of the transistor Q42, the input of the second impedance matching circuit 32 shown in FIG. Transistor Q42 is an npn transistor.

  The base of the transistor Q42 is connected to the input terminal tin, one end of the resistor R3, and one end of the coil L1. The emitter of the transistor Q42 is grounded via a parallel circuit of a resistor R1 and a capacitor C1. The voltage fixing circuit 41 is connected between the other end of the coil L1 and the ground. The voltage fixing circuit 41 includes a diode D1 and a diode D2.

  The anode of the diode D1 constituting the voltage fixing circuit 41 is connected to the other end of the coil L1. The cathode of the diode D1 is connected to the anode of the diode D2, and the cathode of the diode D2 is grounded.

  One end of a coil L2 is connected to the collector of the transistor Q42. The other end of the coil L2 is connected to one end of the resistor R2. The other end of the resistor R2 is connected to the other end of the resistor R3.

  In the television amplifier 40 of the present embodiment, the voltage between the emitter and the collector of the transistor Q42 is controlled by fixing the base potential of the transistor Q42 by the voltage fixing circuit 41 provided between the base of the transistor Q42 and the ground. In the present embodiment, the base potential of the transistor Q42 is fixed to about 1.5V.

  The television amplifier 40 is supplied with a power supply voltage from a power supply circuit 33 connected to the output terminal tout. This power supply voltage is supplied to the base of the transistor Q42 via the coil L2 and the resistors R2 and R3. In the present embodiment, since the base potential of the transistor Q42 is fixed by the voltage fixing circuit 41, when the power supply voltage fluctuates, fluctuations in the current between the emitter and the collector of the transistor Q42 can be suppressed. That is, in the present embodiment, an increase in current consumption of the television amplifier 40 can be suppressed even when the power supply voltage increases. If the increase in current consumption is suppressed, the heat generation of the television amplifier 40 is also suppressed.

  Thus, according to the present embodiment, the base potential of the transistor Q42 can be fixed regardless of the value of the power supply voltage supplied from the tuner unit, and the TV amplifier 40 needs to be designed according to the specifications of the tuner unit. Sex can be excluded. Therefore, according to this embodiment, the versatility of the connector 10 can be improved.

  In the present embodiment, an increase in current consumption of the television amplifier 40 can be suppressed by fixing the base potential of the transistor Q42. Therefore, according to the present embodiment, for example, even when each circuit constituting the amplifier circuit 30 is densely mounted on the substrate 20, heat generation of the substrate 20 due to an increase in current consumption can be suppressed. If the heat generation of the substrate 20 can be suppressed, for example, when the temperature of the vehicle or the window glass for the vehicle becomes high, the possibility that the amplifier circuit 30 is damaged is reduced. Therefore, according to the present embodiment, it is possible to provide a connector that is small and can cope with temperature changes of the vehicle and the window glass for vehicles. In addition, by mounting a connector that can cope with temperature changes, it is possible to provide a vehicle window glass that can stably receive radio waves from an antenna conductor.

  Hereinafter, heat generation of the substrate 20 when a power supply voltage of 8 V is supplied from the tuner unit and when a power supply voltage of 10 V is supplied will be described with reference to Table 1.

電圧固定回路４１を備えていない従来のテレビアンプに対し、８Ｖで動作するチューナユニットが接続された場合、テレビアンプに流れる電流Ｉは１６．４ｍＡであり、発熱量Ｗは１３１．２ｍＷである。尚発熱量Ｗは、Ｗ＝ＶＩで求められる。また従来のテレビアンプに１０Ｖで動作するチューナユニットが接続された場合、テレビアンプに流れる電流Ｉは２１．２ｍＡであり、発熱量Ｗは２１２ｍＷである。

When a tuner unit that operates at 8 V is connected to a conventional television amplifier that does not include the voltage fixing circuit 41, the current I that flows through the television amplifier is 16.4 mA, and the heat generation amount W is 131.2 mW. The calorific value W is obtained by W = VI. When a tuner unit that operates at 10 V is connected to a conventional television amplifier, the current I flowing through the television amplifier is 21.2 mA, and the heat generation amount W is 212 mW.

  Therefore, in a conventional television amplifier, the current I when a tuner unit operating at 10V is connected increases by about 29.3% compared to the current I when a tuner unit operating at 8V is connected. Further, the heat generation amount W when a 10 V operation tuner unit is connected increases by 61.5% compared to the heat generation amount W when an 8 V operation tuner unit is connected.

  On the other hand, in the present embodiment having the voltage fixing circuit 41, when a tuner unit operating at 8V is connected, the current I flowing through the TV amplifier 40 is 16.4 mA, and the heat generation amount W is 131.2 mW. . When a tuner unit operating at 10 V is connected, the current I flowing through the TV amplifier 40 is 17.6 mA, and the heat generation amount W is 176 mW.

  Therefore, in this embodiment, the increase in the current I when the tuner unit operating at 10 V is connected is about 7.3% compared to the current I when the tuner unit operating at 8 V is connected. The increase in the heat generation amount W when the tuner unit operating at 10V is connected is 34.1% compared to the heat generation amount W when the tuner unit operating at 8V is connected.

  As described above, in the present embodiment, by providing the voltage fixing circuit 41 in the TV amplifier 40, when the power supply voltage (operating voltage) supplied from the tuner unit changes, the fluctuation of the current I flowing through the TV amplifier 40 is suppressed. can do. Therefore, in this embodiment, the increase in the current I can be suppressed, and the increase in the heat generation amount W can also be suppressed.

  Below, the result of having measured the heat_generation | fever of the board | substrate 20 of this embodiment is demonstrated.

  In this measurement, the temperature of the substrate 20 when the power supply voltage 8V is continuously supplied to the amplifier circuit 30 for 10 minutes or more at the environmental temperature 25 ° C., and the power supply voltage 10V to the amplifier circuit 30 at the environmental temperature 25 ° C. for 10 minutes or longer. Then, the temperature of the substrate 20 was measured.

  The highest temperature range of the surface of the substrate 20 when a power supply voltage of 8 V is supplied at an environmental temperature of 25 ° C. is 41.9-42.2 ° C. Therefore, the temperature rise of the surface of the substrate 20 due to the power supply voltage of 8V is set to 17.2 ° C. (42.2 ° C.−25 ° C. = 17.2 ° C.).

  The highest temperature range on the surface of the substrate 20 when a power supply voltage of 10 V is supplied at an environmental temperature of 25 ° C. is 46.6-46.9 ° C. Therefore, the temperature rise of the surface of the substrate 20 due to the power supply voltage of 10 V is set to 21.9 ° C. (46.9 ° C.−25 ° C. = 21.9 ° C.).

  At this time, the amount of heat generated on the surface of the substrate 20 by the power supply voltage of 10 V is 27.3% (21.9 ° C./17.2° C. = 127.3) compared to the amount of heat generated on the surface of the substrate 20 by the power supply voltage of 8 V. It will be increased.

  Similarly, the highest temperature range on the back surface of the substrate 20 when the power supply voltage of 8 V is supplied at the environmental temperature of 25 ° C. is 39.4-39.7 ° C. Therefore, the temperature rise of the back surface of the substrate 20 due to the power supply voltage of 8V is set to 14.7 ° C. (39.7 ° C.−25 ° C. = 14.7 ° C.).

  The highest temperature range on the back surface of the substrate 20 when a power supply voltage of 10 V is supplied at an environmental temperature of 25 ° C. is 44.1-44.4 ° C. Therefore, the temperature rise of the back surface of the substrate 20 due to the power supply voltage of 10 V is set to 19.4 ° C. (44.4 ° C.−25 ° C. = 19.4 ° C.).

  At this time, the amount of heat generated on the back surface of the substrate 20 by the power supply voltage of 10 V increased by 32% (19.4 ° C./14.7° C. = 1.320) compared to the amount of heat generated on the back surface of the substrate 20 by the power supply voltage of 8 V. It will be.

  Therefore, in the present embodiment, it can be seen from the measurement results that the amount of heat generated by fluctuations in the power supply voltage is small as compared with the conventional television amplifier that does not include the voltage fixing circuit 41 shown in Table 1.

  Moreover, the result of the durability test of the board | substrate 20 of this embodiment is demonstrated.

  In this measurement, when the power supply voltage 8V is continuously supplied to the amplifier circuit 30 for 720 hours (energization endurance test) at an environmental temperature of 105 ° C. (high temperature) and −40 ° C. (low temperature), respectively, or after 10 minutes of power-off. When 450 cycles of energization for 20 minutes were performed (intermittent energization test), evaluation was made to determine whether the difference in gain, current consumption, electrical characteristics, and appearance conditions in the terrestrial digital TV band before the test are satisfied after the test. did. Each test was evaluated with three samples, and the results are shown in Table 2. The gain difference and current consumption difference are the lowest values.

本実施形態は、係る構成により、テレビアンプ４０の動作保証温度範囲を−４０℃〜１０５℃とすることができる。

According to this embodiment, the operation guarantee temperature range of the television amplifier 40 can be set to −40 ° C. to 105 ° C. with such a configuration.

  As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the requirements shown in the embodiment. With respect to these points, the gist of the present invention can be changed without departing from the scope of the present invention, and can be appropriately determined according to the application form.

  The present invention can be used for a connector fixed to a vehicle window glass.

DESCRIPTION OF SYMBOLS 10 Connector 11 Case 12 Cable insertion part 13 Fixing part 20 Board | substrate 30 Amplifier circuit 31 1st impedance matching circuit 32 2nd impedance matching circuit 33 Power supply circuit 40 TV amplifier 41 Voltage fixing circuit 42 Transistor

Claims (10)

A connector fixed to the vehicle window glass and connected to an antenna conductor provided on the vehicle window glass,
The connector is
An amplifier circuit that amplifies and outputs a received signal received by the antenna conductor;
A connection terminal for electrically connecting the amplifier circuit and the antenna conductor;
A signal output terminal for outputting the received signal output from the amplifier circuit to a communication device mounted on a vehicle,
The amplifier circuit is
A power supply circuit for separating the power supply voltage supplied from the communication device via the signal output terminal and the received signal;
Amplifying means to which the power supply voltage separated by the power supply circuit is supplied;
The amplification means includes
A transistor for amplifying the received signal;
And a voltage fixing circuit for fixing the voltage of the base of the transistor to a predetermined constant voltage.   The said amplifier circuit has a 1st impedance matching circuit connected between the input terminal of the said amplification means connected to the base of this transistor, and the said connection terminal. Connector.   3. The amplifier circuit according to claim 1, further comprising a second impedance matching circuit connected between the output terminal of the amplifier connected to the collector of the transistor and the signal output terminal. Connector described in.   The connector according to any one of claims 1 to 3, wherein the amplifier circuit has a case covering the periphery, and the case is filled with resin.   5. The connector according to claim 1, wherein the signal output terminal includes a cable insertion portion that is detachable from a communication cable connected to the communication device. 6. In a vehicle window glass including an antenna conductor and a connector connected to the antenna conductor,
The connector is
An amplifier circuit that amplifies and outputs a received signal received by the antenna conductor;
A connection terminal for electrically connecting the antenna conductor and the amplifier circuit;
A signal output terminal for outputting the received signal output from the amplifier circuit to a communication device mounted on a vehicle,
The amplifier circuit is
A power supply circuit for separating the power supply voltage supplied from the communication device via the signal output terminal and the received signal;
Amplifying means to which the power supply voltage separated by the power supply circuit is supplied;
The amplification means includes
A transistor for amplifying the received signal;
A vehicle window glass, comprising: a voltage fixing circuit that fixes a voltage of a base of the transistor to a predetermined constant voltage.   The said amplifier circuit has a 1st impedance matching circuit connected between the input terminal of the said amplification means connected to the base of this transistor, and the said connection terminal. Vehicle window glass.   The amplifier circuit has a second impedance matching circuit connected between the output terminal of the amplifier circuit connected to the collector of the transistor and the signal output terminal. The window glass for vehicles according to 7.   The window glass for a vehicle according to any one of claims 6 to 8, wherein the connector has a case in which the amplification means is built, and the case is filled with resin.   The vehicle window glass according to any one of claims 6 to 9, wherein the signal output terminal includes a cable insertion portion that is detachable from a communication cable connected to the communication device.

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