CN100477504C - High-frequency amplifier - Google Patents

High-frequency amplifier Download PDF

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CN100477504C
CN100477504C CN 200410028384 CN200410028384A CN100477504C CN 100477504 C CN100477504 C CN 100477504C CN 200410028384 CN200410028384 CN 200410028384 CN 200410028384 A CN200410028384 A CN 200410028384A CN 100477504 C CN100477504 C CN 100477504C
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high
frequency
amplifier
frequency amplifier
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CN 200410028384
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CN1531193A (en )
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村上拓也
越中范夫
须田清晴
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八木天线株式会社
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Abstract

一种失真检测装置,将产生于输入的第1信号的第1频带中的第1失真分量与相关的第2失真分量产生的第2频带中的第2信号,从该第1信号分波。 A lossy detecting means, the first frequency band to generate first signal to the input 1 of the second distortion signal components in the second frequency band associated with the second distortion component generated from the first signal branching. 所述第1信号的输入电平设为可调整。 The first input signal level to be adjusted. 判定所述第2信号中的所述第2失真分量是否在规定值以上,判定为未达到规定值时,进行调整使所述输入电平增大,判定为在规定值以上时,进行调整使所述输入电平减少。 Determining the second signal in the second distortion component not less than a predetermined value, it is determined does not reach a predetermined value, adjusting the input level increases, it is determined at a predetermined value or more, to adjust to the input level reduced.

Description

高频放大装置 High-frequency amplifying device

技术领域 FIELD

本发明涉及检测用于例如电视播放电波的接收设备和无线通信机等的高频放大器中产生的失真的失真检测装置以及具有失真检测功能的高频放大装置。 The present invention relates to a distortion detecting means for detecting a television broadcast receiving apparatus and a wireless communication radio waves, etc. generated in a high-frequency amplifier and the high frequency distortion having distortion detection means, for example, amplifying function.

背景技术 Background technique

现在, 一般家庭中的电视接收机或共享电视接收系统中,在接收信号的 Now, general household television receiver or a television receiver sharing system, the received signal

信号电平低的情况下,使用日本专利第3239105号公开的那样的高频放大装置(7'—只夕)放大接收信号。 The signal level is low, the high frequency as in Japanese Patent No. 3,239,105 disclosed amplifying means (7'evening only) amplifies the received signal.

在上述高频放大装置中,放大的接收信号电平高,如果放大后的输出电平在放大器的性能以上,则由于非线性失真产生失真分量,在自身频道或其他频道产生对于影像或声音及数字信号的妨害。 In the high-frequency amplifying device, a high level of the amplified reception signal, if the output level of the amplified more than the performance of the amplifier, the distortion component generated due to the nonlinear distortion, or other channels in the own channel to produce video and audio and prejudice to the digital signal. 为了防止这样的失真产生的妨害,现有的高频放大装置具有信号电平调整器,可调整输入信号的电平。 In order to prevent obstruction of such a distortion generator, the conventional high frequency amplifying means having a signal level adjuster, to adjust the input signal level.

图9是表示现有的高频放大装置的结构例。 FIG 9 shows a configuration example of a conventional high-frequency amplifying device. 在图9中,l是接收电视播放电波的天线,该天线1接收的信号输入到高频放大装置2的输入端子3。 In FIG. 9, l is an antenna for receiving television broadcast waves, the antenna 1 receives a signal input to the input terminal of high-frequency amplifying unit 2 3. 上述高频放大装置2具有信号电平调整器4以及放大器5,输入到上述输入端子3的信号由信号电平调整器4调整并输入到放大器5。 The high-frequency amplifying apparatus 24 and an amplifier 5 having a signal level adjuster, the signal input port 3 and input to the adjustment input to the amplifier 5 by the signal level adjuster 4. 放大器5将信号电平调整器4调整的信号放大,通过输出端子6输出到电视接收机。 4 the signal amplifier 5 adjust the signal level adjuster amplifies the output through the output terminal 6 to the television receiver.

在设置上述高频放大装置2的情况下,操作者一边确认电视接收机中的影像和声音无妨害以及输出电平, 一边调整信号电平调整器4。 In a case where the high-frequency amplifying apparatus 2, the operator while checking the television receiver and does not interfere with the video and audio output level, while adjusting the signal level adjuster 4. 如上所述, 通过调整信号电平调整器4,设定高频放大装置2的输出信号的电平为最佳值,可防止失真分量的产生。 As described above, by adjusting the signal level adjuster 4, setting the output signal level of the high-frequency amplifying device 2 to an optimum value to prevent distortion component.

在上述高频放大装置2中调整信号电平调整器4的情况下,必须准备可确认产生的妨害波的测定器(频谱分析仪等),或者必须利用实际的电视接收机和测定设备等, 一边确认影像、声音及信号波形、比特差错率等, 一边进行调整。 In the case of adjusting the signal level adjuster 4 in the high-frequency amplifying device 2, the measurement device must be prepared to confirm the obstruction wave generated (spectrum analyzer), or a television receiver must use the actual measurement equipment and the like, while confirming image, and a sound signal waveform, bit error rate and the like, while adjusting.

但是,电视接收设备的放置场所, 一般地,在屋檐上及高处等的情况多,而须调整用于确认的设备和用于确认的设备的放大器装置不在近处等,调整极端困难的情况多。 However, the case of television receiving apparatus storage place, generally, in the high roof and the like is large, the apparatus to be adjusted for confirming means to confirm and an amplifier device is not near the like, the adjustment extremely difficult circumstances many. 而且,由于是受操作者技能水平影响较多的操作,因此在电视接收时调整高频放大装置2的输出电平的操作是重要的操作之一。 Further, since the level of operator skill is more affected by the operation, and therefore the adjusting operation of the output level of the high-frequency amplifying device 2 is one of the important operations in the television receiver.

发明内容 SUMMARY

因此,本发明的第1目的在于提供一种失真检测装置及高频放大装置, 不需要确认昂贵的测定设备及电视接收机等的实信号而大幅改善操作效率, 并可进行不受操作者主观影响的定量调整。 Accordingly, a first object of the present invention is to provide a distortion detection means and the high frequency amplifying device, not requiring acknowledgment expensive real signal measurement device and a television receiver or the like greatly improve operational efficiency, and can be subjective operator from quantitative impact of the adjustments.

另外,本发明的第2目的在于提供一种失真检测装置及高频放大装置, 接到高频放大器中检测出的失真产生,自动调整输入到高频放大器中的信号的电平,可回避失真的产生,不需要麻烦的调整操作。 Further, a second object of the present invention is to provide a distortion detection means and high frequency amplification means, high frequency amplifier to generate a distortion detected automatically adjusted to the level of a signal inputted high-frequency amplifier, the distortion can be avoided tuned to produce, does not require troublesome operation.

为了实现上述的第1目的,依据本发明,提供一种高频放大装置,包括: 高频放大器,对第l频带进行放大; To achieve the above first object, according to the present invention, there is provided a high-frequency amplifying device, comprising: a high-frequency amplifier for amplifying the first frequency band l;

分波部件,将多个频道的输入信号被输入到所述高频放大器而在所述高频放大器的输出中产生的第1频带的3次失真分量的信号,和在第2频带中产生的2次失真分量的信号,在所述高频放大器的输出中,通过滤波器分波并分离为第1频带和第2频带; Demultiplexing means, the input signal is inputted to the plurality of channels to generate the high-frequency amplifier at the output of the high-frequency amplifier 3 of the first signal distortion component bands, and generating the second frequency band 2 the distortion component signal, the output of the high-frequency amplifier, the duplexer through a filter and separated into a first frequency band and the second band;

检波部件,对包含由所述分波部件分波的2次失真分量的第2频带的信号进行检波; Detection means divided by the signal containing the second-order distortion component band 2 wave component demultiplexed performs detection;

报告产生了失真。 Report generation distortion.

通过上述放大部件放大作为第1信号的例如电视播放波的情况,如果放大部件的输入超过合适的电平成为过输入时,在影像载波和声音载波或多个电视信号之间产生2次失真、3次失真等的多次的失真分量,对该电视播放波频带(第1频带)的电视信号产生妨害。 Through the amplification of said amplifying means as a first signal, for example, the case of television broadcasting wave, if the input exceeds the amplifying means becomes an appropriate level through the input, a distortion between the occurrence of the secondary video carrier and a sound carrier or a plurality of television signals, 3 times distortion distortion component is generated prejudice the TV broadcast wave band (first frequency band) television signal. 由于作为2次失真分量之一的2 波的差信号分量产生于比电视播放频带低的频带(第2频带),虽然实质上不成为电视信号的妨害,但与所述妨害波分量在电平上保持相关性地发生。 Since the wave as a difference signal component of one of the two secondary distortion component generated in a frequency band lower than the television band (second frequency band), although not become substantially prejudice television signal, but the wave component at the level of obstruction on maintaining relevance occur.

上述放大部件的输出信号(第2信号)中,作为上述第2失真分量的例如2次失真分量由分波部件分波并输入到检波部件。 Output signal of the amplifying means (second signal), the distortion component as the second example, a secondary distortion component demultiplexed and input to a demultiplexer member detection means. 该检波部件将上述分波部件分波的2次失真分量检波,变换为直流分量并输出到报告部件。 The detection member to the branching member demultiplexing secondary distortion component detector, converted into a DC component and outputs the report to the member. 该报告部件在上述放大部件输出的2次失真分量的电平为比预先设定的电平小的正常状态时不报告,但在上述2次失真分量的电平在预先设定的电平以上时报告发生了失真,让操作者知道由于放大部件的输出信号包含的失真而产生影像妨害等。 The report does not report member 2 at the level of the distortion component output from the amplifying means is smaller than a power level of the normal state set in advance, but the level of the secondary distortion components at a predetermined level or more when reporting the occurrence of distortion, so that the operator knows that the amplified output signal due to the distortion component generated images comprising prejudice the like. 操作者通过上述报告部件确认失真的发生,调整放大部件的输入电平等。 The operator confirms distorted by said reporting component, amplifying the input level is equal to the adjustment member.

通过上述那样在电视播放频带外检测出失真分量,可判断频带内是否产生了妨害波,可不受其他频道地影响,切实检测出失真分量。 Described above, the distortion component detected in the outer band through the television, may determine whether the obstruction wave generated in a frequency band, can not affect the other channels, and effectively detected distortion component. 因此,不需要另外确认测定机等设备和电视接收机等的实信号,可大幅改善操作效率,并可进行不受操作者主观左右的定量的调整,可得到高品质的接收系统。 Thus, no additional real acknowledgment signal measuring device and other equipment such as a television receiver, can greatly improve the operation efficiency, and can be adjusted from the operator quantitative subjective about, a high-quality reception system.

为了实现上述的第2目的,依据本发明,提供一种高频放大装置,包括: 高频放大器,对第l频带进行放大; To achieve the above second object, according to the present invention, there is provided a high-frequency amplifying device, comprising: a high-frequency amplifier for amplifying the first frequency band l;

分波部件,将多个频道的输入信号被输入到所述高频放大器而在所述高频放大器的输出中产生的第1频带的3次失真分量的信号,和在第2频带中产生的2次失真分量的信号,在所述高频放大器的输出中,通过滤波器分波并分离为第l频带和第2频带; Demultiplexing means, the input signal is inputted to the plurality of channels to generate the high-frequency amplifier at the output of the high-frequency amplifier 3 of the first signal distortion component bands, and generating the second frequency band 2 the distortion component signal, the output of the high frequency amplifier, and separated through a filter duplexer for the first frequency band and the second band l;

-险波部件,对包含由所述分波部件分波的2次失真分量的第2频带的信号进行检波; - dangerous wave member, comprising a signal divided by the second-order distortion component band 2 wave component demultiplexed detection is performed;

调整部件,调整所述第l频带的输入信号电平; Adjusting means adjusting the input signal level of the l-band;

控制部件,在判定为所述检波部件中的检波输出的电压电平未达到规定值时,控制所述调整部件使所述输入信号电平增大,在判定为在规定值以上时,控制所述调整部件使所述输入信号电平减少。 Control means, when it is determined that the detection output of the detecting member does not reach the voltage level of a predetermined value, said control means adjusting the input signal level increases, it is determined at a predetermined value or more, the control said adjusting means so that the input signal level is reduced.

通过上述放大部件放大作为第l信号的例如电视播放波的情况下,如果向放大部件的输入超过合适的电平成为过输入时,在影像载波和声音载波或多个电视信号之间产生2次失真、3次失真等的多次的失真分量,对该电视播放波频带(第1频带)的电视信号产生妨害。 Through the amplification of said amplifying means as a first signal, for example, the case where l television broadcasting wave, if an input to the amplifying means exceeds the appropriate level becomes too input image is generated between the secondary carrier and a sound carrier or a plurality of television signals distortion, third-order distortion such as distortion component multiple times, resulting in obstruction of the television broadcast wave band (first frequency band) television signal. 由于作为2次失真分量之一的2波的差信号分量产生于比电视播放频带低的频带(第2频带),所以虽然实质上不成为电视信号的妨害,但与所述妨害波分量在电平上保持相关性地发生。 Since the wave as a difference signal component of one of the two secondary distortion component generated in a frequency band lower than the television band (second frequency band), although it does not become substantially prejudice television signal, but the wave components in electrical prejudice correlation occurs holding level.

上述放大部件的输出信号(第2信号)中,将作为上述第2失真分量的例如2次失真分量分波并输入到控制部件。 Output signal of the amplifying means (second signal), the distortion component e.g. demultiplexer 2 and input to the control section as the second distortion component. 该控制部件通过比较器将分波的2次失真分量与基准电压比较,按照比较结果调整向放大部件的输入信号的电平。 The control by the comparator means the demultiplexed secondary distortion component with a reference voltage comparator, adjusting the level of the input signal to the amplifying means in accordance with the comparison result. 通过上述那样,控制部件基于检波器的输出信号,将向放大部件的输入信号的电平恒常保持合适的电平,由此可回避放大部件中失真的产生。 By the above-described, control means based on the output signal of the detector, the level of the input signal will be amplified in the holding member constancy suitable level, it can be avoided thereby producing an amplified distortion component. 因此, 不需要另外确认测定机等设备和电视接收机等的实信号,同时不需要麻烦的调整操作,可得到高品质的接收系统。 Thus, no additional real acknowledgment signal measuring device and other equipment such as a television receiver, while not requiring troublesome adjustment operation, to obtain high-quality reception system.

附图说明 BRIEF DESCRIPTION

图1是表示本发明实施例1的高频放大装置的全体构成的方框图。 FIG. 1 is a block diagram of the entire configuration of the high-frequency amplifying device of Example 1 of the embodiment of the present invention.

图2是本用于说明图1的高频放大装置中的失真^r测动作的图。 FIG 2 is a view for explaining distortion, high frequency apparatus of FIG. 1 is an enlarged ^ r measurement operation FIG. 图3是表示电视接收放大器中2波输入时的3次失真特性的图。 FIG 3 is a diagram showing third-order distortion characteristics when the television receiver amplifier 2 wave input. 图4是表示电视接收放大器中2波输入时的2次失真特性的图。 FIG 4 is a diagram showing a secondary distortion characteristic of the amplifier when the television receiver 2 wave input. 图5A是表示向电视接收放大器的输入频率为611MHz、 617MHz时测定 5A is a frequency of the received input to the television amplifier 611MHz, 617MHz when measured

的输出电平与3次失真的关系的结果的图。 Output level with the results of third-order distortion of the relationship of FIG.

图5B是表示电视接收放大器的输入频率为611MHz、 617MHz时测定的 5B is a frequency of a television receiver input amplifier is 611MHz, measured at 617MHz

输出电平与2次失真的关系的结果的图。 The output level with the results of the secondary distortion of the relationship of FIG.

图6是图5中的测定结果图表化表示的图。 FIG 6 is measurement results in Figure 5 represents a graph of FIG.

图7是表示本发明实施例2的高频放大装置的全体构成的方框图。 FIG 7 is a block diagram of the whole configuration of the high-frequency amplifying device of Example 2 of the embodiment of the present invention. 图8是表示图7的高频放大装置中信号电平调整器以及失真检测自动调整电路的细节的图。 FIG 8 is a high-frequency amplifier 7 in the signal level adjusting means and automatically adjusts the distortion detection circuit in FIG detail.

图9是表示现有的高频放大装置的构成的方框图。 9 is a block diagram showing a configuration of conventional high-frequency amplifying device.

具体实施方式 detailed description

以下,参照附图来说明本发明的最佳实施方式。 Hereinafter, the embodiment will be described preferred embodiments of the present invention with reference to the accompanying drawings.

图1表示本发明实施例1的高频放大装置12。 1 shows an embodiment of the present invention, the high-frequency amplifying device 12 embodiment. 11是接收电视播放电波的天线,该天线11接收的信号输入到高频放大装置12的输入端子13。 11 is an antenna for receiving television broadcast waves, the antenna 11 receives a signal inputted to the input terminal of high-frequency amplifying device 12 13. 所述高频放大装置12,具有可手动操作进行电平调整的信号电平调整器14以及高频放大器15,输入到上述输入端子13的信号由信号电平调整器14调整并输入到高频放大器15。 The signal level adjuster high-frequency amplifier means 12, having a manually adjust the level of the high frequency amplifier 14 and 15, the input signal to the input terminal 13 by the adjustment signal level adjuster 14 and input to the high frequency amplifier 15. 该高频放大器15,例如是使用A级放大电路,将信号电平调整器14调整的信号例如按图2所示放大为FM播放(76 ~ 90MHz )、 1 ~ 12频道的VHF电视播放(90 ~ 108MHz、 170 ~ 222MHz )甚至UHF电视播放的信号,经由分波器,例如使70MHz以上的频率的信号通过的高通滤波器(HPF) 16,通过输出端子17输出到后级的电子设备,例如电视接收机等。 The high frequency amplifier 15, for example using a class A amplifier circuit 14 adjusts the signal level adjustment signal for example as shown in Figure 2 is an enlarged FM playback (76 ~ 90MHz), VHF television channels 1 to 12 (90 ~ 108MHz, 170 ~ 222MHz) even UHF television broadcast signal via a branching filter, for example more than 70MHz frequency signal through a high pass filter (HPF) 16, output through the output terminal 17 after stage electronic device, e.g. television receivers.

上述高频放大器15与高通滤波器16之间连接失真检测电路20。 Distortion detection circuit 20 is connected between the high-frequency amplifier 15 and the high-pass filter 16. 该失真 This distortion

8检测电路20从高频放大器15输出的信号中,经由分波器,例如使40MHz以下的频率的信号通过的低通滤波器(LPF) 21,取出包含设定频带内产生的失真分量和相关的失真分量的设定频带外的信号。 20 circuit 8 detects the signal outputted from the high-frequency amplifier 15, via a demultiplexer, for example, a signal frequency below 40MHz low pass filter (LPF) 21 through, withdrawing a distortion component generated within the frequency band and the associated set signals outside the band of the distortion component set. 而且,该低通滤波器21的输出信号由放大器22放大后,由检波器23检波,输入到显示驱动电路24。 Further, the output signal of the low pass filter 21 is amplified by a post amplifier 22, a detector 23 detecting input to the display driving circuit 24. 该显示驱动电路24,基于检波器23的输出信号,显示驱动例如LED (Light Emitting Diode:发光二极管)等的显示灯25。 The display driving circuit 24, based on the output signal of the detector 23, for example, the display driving LED (Light Emitting Diode: LED) display lamp 25 or the like.

在上述的结构中,经由天线ll接收电视播放信号,输入到高频放大装置12。 In the above configuration, an antenna receiving a television broadcast signal via ll, 12 is inputted to the high-frequency amplifying device. 高频放大装置12将天线11接收的信号在信号电平调整器14调整后,在高频放大器15放大,经由高通滤波器16从输出端子17输出到电视接收机等。 After the high-frequency amplifying unit 12 signals received by the antenna 11 to adjust the signal level adjuster 14, the high frequency amplifier 15 amplifies the output from the output terminal 16 to the television receiver 17 via the high-pass filter.

由于上述高频放大器15的非线性失真,发生例如2波的电3见接收信号的3次失真并发生影像和声音的妨害的情况时,发生与该3次失真有相关关系的2次失真。 Due to non-linear distortion of the high-frequency amplifier 15, see for example the occurrence of an electrical 3 3 2 wave distortion of the received signal times and circumstances that will jeopardize the audio and video occurs, the occurrence of distortion associated with a secondary relationship with the third-order distortion. 上述3次失真在电视信号的频带内产生,但2次失真是比电视信号的频带低的频率,例如是产生在40MHz以下的频带。 The above-described third-order distortion in the band of the television signal is generated, but is lower than 2-order distortion frequency band of a television signal, for example, is generated in a frequency band of 40MHz or less.

失真检测电路20从高频放大器15输出的信号中,经由低通滤波器21, 取出超过规定电平的40MHz以下的失真分量,例如2次失真分量,由放大器22放大后,由检波器23检波并变换为直流分量,输入到显示驱动电路24。 Distortion detection circuit 20 from the signal output from high frequency amplifier 15 via a low-pass filter 21, the distortion component extracted 40MHz or less than a predetermined level, for example, 2-order distortion component, amplified by the amplifier 22, detection by the detector 23 and converted into a DC component is input to the display driving circuit 24.

此时,如果高频放大器15输出的2次失真分量的电平是比预定电平低的正常状态,则显示驱动电路24不动作,不驱动显示灯25。 At this time, 2 times if the level of the distortion component output from the high frequency amplifier 15 is lower than the predetermined level, the normal state, the display drive circuit 24 does not operate, the display lamp 25 is not driven. 但是,如果高频放大器15输出的2次失真分量的电平是在预定电平以上,则显示驱动电路24依据上述2次失真分量,驱动并点亮显示灯25,使操作者知道由于高频放大器15的输出信号包含的失真而产生影像妨害。 However, the distortion component level 2 if the output of high frequency amplifier 15 is at a predetermined level or more, the display driving circuit 24 according to the second-order distortion component, and driving the lighting display lamp 25, the operator knows that the high-frequency the output signal from amplifier 15 to generate an image containing distortion in prejudice.

操作者依据上述显示灯25点亮,确认高频放大器15的输出信号中产生失真,在显示灯25灭灯之前,通过信号电平调整器14调整接收信号电平。 The operator according to the display lamp 25 is lit to confirm the output signal of the high frequency amplifier 15 is distorted, before lights off display lamp 25, by adjusting the signal level of the received signal level adjuster 14.

参照图2更详细说明上述高频放大器15中产生的失真。 Referring to FIG. 2 described in more detail distortion of the high-frequency amplifier 15 generated. 这里考察例如VHF电视的8、 10、 12频道中产生的失真。 For example investigated here distortion 8, 10, 12 of the VHF television channels generated.

8、 10、 12频道的影像频率fs、 f1()、 &2为 8, 10, the image frequency fs 12 channels, f1 (), & 2 of

f8: 193.25MHz f8: 193.25MHz

f10: 205.25MHz f10: 205.25MHz

f12: 217.25MHz f12: 217.25MHz

上述8频道与10频道中的3次失真分量H3为H3=2 x f10 - f8=2 x 205.25(MHz) - 193.25(MHz) =217.25(MHz) Channels 8 and 10 above the channel as a third-order distortion component H3 H3 = 2 x f10 - f8 = 2 x 205.25 (MHz) - 193.25 (MHz) = 217.25 (MHz)

=f12 = F12

上述那样8频道与10频道中的3次失真分量H3为217.25MHz,与12 频道的影像频率一致,对12频道的影像信号产生妨害。 8 and described above, the channel 10 in the channel H3 is a third-order distortion component 217.25MHz, 12 coincides with the frequency of the video channel, the video signal 12 is generated prejudice channel. 而上述8频道与10频道中的2次失真分量H2为H2=f10 - f8 8 and 10 channel and said secondary channel distortion component H2 of H2 = f10 - f8

=205.25(MHz) — 193.25(MHz) = 205.25 (MHz) - 193.25 (MHz)

=12(MHz) = 12 (MHz)

上述那样8频道与10频道中的2次失真分量H2为12MHz,在40MHz 以下,即,在电视播放频道的频带以外,而且与3次失真分量H3具有相关关系。 8 described above, in the channel to the secondary channel 10 distortion component H2 of 12MHz, 40MHz in the following, i.e., outside the band of television channels, and the third-order distortion component has a correlation H3.

图3是表示实际的电视接收放大器的2波输入时的3次失真特性的图, 横轴取信号的输出电平(dBjU),纵轴取3次失真(dB)。 FIG 3 is a diagram showing third-order distortion characteristics when the two waves enter the actual television receiver amplifier, the output signal level of the horizontal axis (dBjU), the vertical axis represents third-order distortion (dB). 图中a的部分表示输入信号对3次失真以1: 3变化的线性区域,b的部分表示输入信号对3次失真不再以l: 3变化的非线性区域。 Figure represents a portion of the third-order distortion of the input signal to 1: 3 changes linearly region, b represents the input signal is no longer part of the third-order distortion to l: linear region 3 changes. 上述测定的电视接收放大器的性能,在接收时,表示不受失真的妨害信号的影响而可输出的性能的规格3次失真(相互调制失真)可确保-52dB的最大输出电平,从上述图3的失真特性可知为105dBpt。 Performance of the measurement amplifier of a television receiver, upon reception, the signal is not prejudice shows the influence of distortion and may output the third-order distortion performance specifications (intermodulation distortion) ensures that the maximum output level of -52dB, from the FIG. 3 of distortion characteristics known as 105dBpt.

图4是表示上述电视接收放大器的2波输入时的2次失真特性的图,横轴取信号的输出电平(dB/i),纵轴取3次失真(dB)。 FIG 4 is a diagram showing a secondary distortion characteristic when the input to the television receiver 2 wave amplifier, the output level (dB / i) horizontal axis signal, third-order distortion the vertical axis (dB). 图中c的部分表示输入信号对2次失真以1: 2变化的线性区域,d的部分表示输入信号对2次失真不再以1: 2变化的非线性区域。 FIG portion c 2 denotes an input signal to the distortion 1: 2 change in the linear region, part of the input signal d represents the secondary distortion is no longer a 1: 2 change of non-linear region. 上述3次失真的a区域与2次失真的c区域,都是线性区域,具有相关关系。 The above-described third-order distortion region and a secondary region c distortion, both linear region having correlation.

电视用高频放大装置的标准3次失真(相互调制失真)为-52dB左右, 可确保该-52dB左右的放大装置的最大输出电平为105 ~ 110dB/x左右。 Standard television high-frequency amplifying device in order distortion (intermodulation distortion) of about -52dB, to ensure that the maximum output level of about -52dB of the amplifying means is about 105 ~ 110dB / x. 而与该3次失真相当的放大装置的2次失真的输出电平为50dB/i。 And the output level of the secondary distortion corresponding third-order distortion amplifying means is 50dB / i. 因此,失真检测电路20,由低通滤波器21从高频放大器15的输出信号提取超过50dBM的2次失真分量,由检波器23检波并点亮显示灯25。 Thus, distortion detection circuit 20, a low-pass filter 21 exceeds the output signal from the high-frequency amplifier 15 is extracted twice 50dBM distortion component, from the detector 23 is detected and the lighting display lamp 25.

通常,在电视接收放大器中,失真造成妨害而给电视图像带来问题的输出电平的点是取2次失真和3次失真的相关的点,这样得到的范围是图3的a和图4的C的区域内,因而检测出该线性区域内的失真分量电平就可以。 Typically, in the television receiver amplifiers, the distortion problem causing nuisance brought to a television output level of the image point is taken twice and associated distortion point of the third-order distortion, the range is thus obtained a FIGS. 3 and 4 the region C, so that the detected distortion component level within the linear region can be. but

是,在3次失真位于电视频道的频带内时,如果检测3次失真,则可能也检 That, when the third-order distortion frequency band located within the television channel, if the third-order distortion is detected, the subject may also be

测其他频道的信号。 Measuring signal other channels. 因此,在本实施方式中,通过在电视频道的频带外检测 Accordingly, in the present embodiment, the band detected by the television channel

与3次失真有相关关系的2次失真,检测频带内产生的妨害波。 2 and 3 there is distortion-order distortion correlation, obstruction wave generated within the detection band. 结果,不受 As a result, not

其他频道影响,可切实检测失真分量。 Impact of other channels, can effectively detect distortion components.

因此,不需要在高频放大装置12之外确认测定机等设备和电视接收机等 Thus, no acknowledgment measuring and other equipment outside the television receiver and the high-frequency amplifying device 12 or the like

的实信号,可大幅改善操作效率,并可进行不受操作者主观左右的定量的调整,可得到高品质的接收系统。 The real signal, the operation efficiency can be greatly improved, and can be adjusted from the operator quantitative subjective about, a high-quality reception system.

上述图3和图4中示出电视接收放大器的VHF电视频道中的失真特性, 在UHF电视频道中3次失真和2次失真之间也具有相关关系。 3 is shown in FIG. 4 and FIG an amplifier distortion characteristic of the television receiver VHF television channels in UHF television channels have a correlation between the secondary and third-order distortion distortion.

图5A、图5B是表示电视接收放大器的输入频率为611MHz (UHF36频道的中心频率)、617MHz (UHF37频道的中心频率)时测定的输出电平与3 次及2次失真的关系的结果的图。 5A, FIG. 5B shows the input frequency of the television receiver amplifier is 611MHz (center frequency UHF36 channel), showing the results of the output level determined when 617MHz (center frequency UHF37 channels) and 3 times and 2 times distortion relationship . 另外,图6是将该测定结果图表化表示的图。 Further, FIG. 6 is a graph of the measurement results shown in FIG.

由图6可明白,电视接收放大器在UHF频道中3次失真和2次失真之间也具有相关关系。 Can be appreciated from FIG. 6, the channel in the UHF television receiving amplifier also has a correlation between the secondary and third-order distortion distortion.

上述那样,放大器产生的多次失真例如2次失真和3次失真之间具有相关关系的情况,在「电视共同接收技术」(日本放送出版协会1974年9月20 日发行)中的「非线性失真的公式说明」(38~43页)进行了详细说明。 "Nonlinear described above, repeatedly distortion is a correlation between the 2-order distortion and third-order distortion produced by the amplifier, for example," joint TV reception technology "in (Japan Broadcasting Publishers Association issued September 20, 1974) in distortion of formula Description "(38 to 43) is described in detail.

在上述实施方式中表示了通过失真检测电路20检测2次失真分量的情况,检测的失真分量当然可以是2次失真分量,按照使用用途选择^r测的失真分量为3次、4次直至多次,可进行正确的判断,并可进行适当的处理。 Expressed by where distortion detection circuit 20 detects the secondary distortion component, the distortion component detected may of course be two times the distortion component, in accordance with the intended use to select ^ r measured distortion component is 3. In the above embodiment, the 4 times until multiple times, correct judgment can be performed, and appropriate processing. 即,通过检测电视播放频道的频带之外产生的失真分量,使其他频道不受影响,可切实检测失真分量。 That is, the distortion component outside the frequency band by detecting television channels generated by the other channels unaffected, can be reliably detected distortion component.

在检测的失真分量小的情况下,如图1所示通过在检波器23之前插入检测频带的放大器22,可切实进行失真分量的检测。 At low distortion component detected case, as 122, can be reliably detected distortion component detected by the band amplifier inserted before the detector 23 shown in FIG. 相反地,在检测的失真分量大的情况下,不需要放大器22,而且可考虑插入衰减电路。 Conversely, in a large distortion component detected case, no amplifier 22, and the insertion loss circuit may be considered.

而且,在上述实施方式中,示出了通过显示灯25通知操作者产生了妨害波的情况,另外,通过蜂鸣器、声音或震动等通知操作者也可以。 Further, in the above-described embodiment, it shows another, by a buzzer, a sound or vibration notify the operator via the display lamp 25 may inform the operator of a case where an obstruction wave.

而且,在上述实施方式中,示出了通过显示灯25通知才喿作者产生了妨害波的情况,也可以在正常时、即妨害波未产生时点亮显示灯25,而在产生妨害波时关灭显示灯25。 Furthermore, when the above-described embodiment, a lighting display shown by the display lamp 25 when the lamp 25 notifies it of a case where an obstruction Qiao wave may be normal, i.e. nuisance wave is not generated, and the generated wave prejudice off display lamp 25 off. 另外,通过显示灯25的颜色来告知是否产生妨害波也可以。 Further, by displaying the color of the lamp to inform whether an obstruction 25 may be waves. 例如也可以在正常时以绿色点亮显示灯25,在发生妨害波时切换为红色。 May be displayed, for example, lamp 25 is lit in green during normal switch to red when prejudice wave generation.

而且,上述实施方式中的失真检测电路20,通过低通滤波器21从高频放大器15的输出信号中提取超过设定电平的设定频带外的失真分量,另夕卜, 例如通过低通滤波器21提取低电平的失真分量,此后,通过显示驱动电路24从检波器23的检波输出中检测高于设定电平的失真分量并显示驱动显示灯25也可以。 Further, the above-described embodiment of the distortion detection circuit 20, low-pass filter 21 extracts a distortion component outside exceeds a set level of output signal from the high-frequency band setting amplifier 15, the other Bu Xi, for example, by a low-pass low distortion component extracting filter 21 and thereafter, by the display drive circuit 24 detects the distortion component is greater than a set level detection output from the detector 23 and the display driver 25 may display lamp.

图7表示本发明实施例2的高频放大装置112。 7 shows an embodiment of the present invention, the high-frequency amplifying device 112 2. 本实施例的失真检测自动调整电路120从高频放大器15输出的信号中,经由低通滤波器21,取出超过规定电平的40MHz以下的失真分量,例如2次失真分量,由放大器22 放大后,由检波器23检波并变换为直流分量,输入到电压比较器124,在比较器125与基准电压源126产生的基准电压比较,将该比较输出信号反馈到信号电平调整器14。 After detecting the distortion of the present embodiment of the automatic adjusting circuit 15 outputs the signal 120 from the high-frequency amplifier via a low pass filter 21, the distortion component extracted 40MHz or less than a predetermined level, for example, 2-order distortion component, amplified by the amplifier 22 , the detector 23 is detected and converted into a DC component is input to the voltage comparator 124, the reference voltage at the comparator 125 and the reference voltage source 126 generates the comparison, the comparison output signal is fed to the signal level adjuster 14. 除此以外的结构与上述的实施例1是相同的,对应的部件赋予相同的参照号码,同时省略它们的详细说明。 Other than the above-described structure is the same as in Example 1, corresponding parts are given the same reference numbers, while omitting detailed description thereof.

本实施例中,如果高频放大器15输出的2次失真分量比预先设定的电平低,则电压比较器124提升用于驱动信号电平调整器14的电压信号电平,直至2次失真分量达到预先设定的设定电平。 In this embodiment, if the secondary distortion component output from the high frequency amplifier 15 is lower than the preset level, the voltage comparator 124 to boost the voltage for driving the signal level of the signal level adjuster 14 until the secondary distortion component reaches a set level set in advance. 然而,如果高频放大器15输出的2次失真分量的电平比预先设定的电平高,则电压比较器124降低用于驱动信号电平调整器14的电压信号。 However, the distortion component level 2 if the output of high frequency amplifier 15 is higher than the preset level, the voltage comparator 124 to reduce the voltage signal for driving a signal level adjuster 14. 通过这样,检测高频放大器15的输出信号包含的失真分量,自动控制信号电平调整器14,可避免高频放大器15中失真的产生。 By this, the distortion components of the output signal detector comprises a high frequency amplifier 15, the signal level automatic adjuster 14, can generate a high-frequency amplifier 15 to avoid distortion.

下面参照图8说明上述信号电平调整器14以及电压比较器124的细节。 Referring to FIG. 8 illustrates the details of the signal level adjuster 14 and a voltage comparator 124.

如上所述,电压比较器124包括比较器125以及基准电压源126。 As described above, the voltage comparator 124 includes a comparator 125 and a reference voltage source 126. 检波器23检波的信号变换为直流分量通过输入端子31输入到比较器125的-端子, 而来自基准电压源126的基准电压提供给比较器125的+端子。 The detector signal is converted to a direct current component detector 23 via the input terminal 31 is input to the comparator 125 - terminal and the reference voltage from the reference voltage source 126 is supplied to the + terminal of the comparator 125.

上述基准电压源126,是在+E的电源线与接地之间连接电容32,同时连接电阻33、可变电阻34和电阻35的串联电路,从上述可变电阻34的旋动端子取出的电压经由电阻36提供给比较器125的+端子。 The reference voltage source 126, a power supply line between + E and the ground is connected to capacitor 32, while resistor 33 is connected, a variable resistor 34 and a series circuit of a resistor 35, taken from the variable resistor 34 of the rotating terminal voltage provided to the comparator 125 through a resistor + terminal 36. 另外,比较器125 的+端子与4矣地间连接电容37。 Further, between the + terminal of the comparator 4 connected to carry 37 125 capacitance.

如上所述,基准电压源126,是通过电阻33、可变电阻34和电阻35的串联电路分压电源线的+E的电压,从可变电阻34的旋动端子取出分压电压 As described above, the reference voltage source 126, a voltage division voltage + E power supply line via a resistor 33, variable resistor 34 and a series circuit of a resistor 35, taken from the variable resistor divided voltage terminal 34 swirled

作为基准电压经由电阻36提供给比较器125的+端子。 As the reference voltage to the + terminal of comparator 125 via a resistor 36. 上述基准电压的值可通过可变电阻34任意地调节,因此可将信号电平调整器14的动作设定为合适的状态。 Value of the reference voltage can be freely adjusted by the variable resistor 34, so the operation of the signal level adjuster 14 may be set to an appropriate state.

另外,上述比较器125的-端子与输出端子之间并联连接电阻38以及电容39。 Further, the comparator 125 - the parallel connection between resistor 38 and a capacitor 39 and output terminals. 而且,在比较器125的输出端子与接地间连接电容40。 Furthermore, between the output terminal of the comparator 125 is connected to ground capacitor 40. 上述比较器125比较由检波器23检波的信号和从基准电压源126获得的基准电压,将该比较输出电压经由电阻42输出到信号电平调整器14。 Said comparator 125 compares the detected signal detector 23 and the reference voltage obtained from a reference voltage source 126, the comparator output voltage through the resistor 42 to the signal level regulator 14.

信号电平调整器14例如由NPN型晶体管Trl、 Tr2与信号电平调整用PIN 二极管Dl ~D6作为主体构成。 Signal level adjusting unit 14, for example, an NPN type transistor Trl, Tr2 and signal level adjustment as PIN diodes Dl ~ D6 constituting the main body. 高频信号通过输入端子51经由电容52 输入到上述晶体管Trl的基极。 A high frequency signal is input to the base of the transistor Trl through the input terminal 51 via a capacitor 52. 另外,电源线的+E电压由电阻53、 54分压并提供给晶体管Trl的基极。 Further, + E and the voltage supply line is provided by resistors 53, 54 to the partial pressure of the base of the transistor Trl. 晶体管Trl的发射极经由电阻55、 56接地,同时电阻56与电容57并联连接。 The emitter of the transistor Trl electrode 55 via a resistor 56 to ground, while the resistor 56 and the capacitor 57 are connected in parallel.

上述晶体管Trl、Tr2是级联连接,晶体管Trl的集电极经由高频线圈58、 59和电阻60与晶体管Tr2的发射极连接。 The transistor Trl, Tr2 are connected in cascade, the collector of the transistor Trl through the high frequency coil 58, the resistor 59 and the emitter 60 and the transistor Tr2 is connected. 上述高频线圏58和59的连接点经由电容61接地,高频线圈59与电阻60的连接点经由电容62接地。 Rings of the high-frequency line 58 and the connection point 59 is grounded via a capacitor 61, a high-frequency coil 59 and the connection point of the resistor 60 is grounded via a capacitor 62.

这样,从晶体管Trl的集电极取出的高频信号,经由电容64、 65、反方向连接的PIN二极管Dl、电容66、 67,输入到晶体管Tr2的基极。 Thus, taken from the collector of the transistor Trl frequency signal, PIN diode Dl is connected via 64, 65, in the opposite direction capacitors, capacitors 66, 67, is input to the base of transistor Tr2. 上述电容64、 65的中点与晶体管Trl的基极之间,设有电阻68、 69的串联电路, 高频线图70与电阻69并联连接。 The capacitor 64, the transistor Trl and the midpoint between the base 65, with a resistor 68, the series circuit 69, the high-frequency line 70 and the resistor 69 in parallel connection.

上述PIN 二极管Dl的阴极侧,经由电阻71接地,同时经由电阻72、 反方向连接的PIN二极管D2以及电容73接地。 The cathode side of the PIN diode Dl via a resistor 71 to ground, while the PIN diode D2 and a capacitor 73 connected to ground via 72, the resistance in the opposite direction. 而电容66、 67的中点经由电阻74、顺方向连接的PIN二极管D3以及电容75接地,同时经由高频线圈76以及电容77接地。 And capacitors 66, PIN diode D3 is connected to a midpoint 67 via a resistor 74 and a capacitor 75 to ground in the forward direction, while the ground 77 via the high frequency coil 76 and a capacitor. 这样,上述PIN 二极管D2的阳极与PIN 二极管D3的阴极连接。 Thus, connecting the cathode of the PIN diode D2 and the anode of the PIN diode D3.

上述晶体管Tr2的基极经由电阻78接地。 The base of the transistor Tr2 is grounded via a resistor 78. 电源线+E的电压经由电阻79 以及高频线圈80提供给上述晶体管Tr2的集电极。 The power supply line voltage + E is provided via a resistor 79 and a high frequency coil 80 to the collector of the transistor Tr2. 上述电阻79与高频线圈80的连接点经由电容90接地。 The resistor 79 to the connection point of the high frequency coil 80 is grounded via a capacitor 90. 这样,由上述晶体管Tr2放大的高频信号,从高频线圏80的中间抽头取出,经由电容81、反方向连接的PIN二极管D4以及电容82、 83输出到输出端子100。 Thus, the transistor Tr2 is amplified by a high frequency signal, the intermediate wire rings of the high-frequency extraction tap 80, PIN diode D4 is connected via a capacitor 81, capacitor 82 in the opposite direction, and the output 83 to the output terminal 100.

而且,在上述晶体管Tr2的基极与高频线圏80的中间抽头之间,串联设有电阻84、 85、 86,同时对电阻84并联连接高频线圏87,对电阻85并联连接高频线圏88。 Further, between the base line and the rings of the above-described high-frequency transistor Tr2 intermediate tap 80 in series with resistor 84, 85, 86, while the resistor 84 is connected in parallel rings of high frequency line 87, the shunt resistor 85 is connected to a high frequency rings of wire 88. 另夕卜,PIN二极管D1的阳极与PIN二极管D4的阴极之间串联连接高频线圏91、 92,同时在高频线圈91、 92的中点与接地间设有电容93。 Another Bu Xi, rings of series-connected high-frequency line 91, 92 between the cathode and the anode of the PIN diode of the PIN diodes D1 and D4, and capacitor 93 is provided between the midpoint and ground in a high-frequency coil 91, 92.

上迷PIN 二极管D4的阴极侧经由电容94、反方向连接的PIN 二极管D5、电阻95以及电容96的串联电^4妻地。 PIN diode D5, a resistor 95 and a capacitor electrically in series on the cathode side of the PIN diode D4 is connected to fan via a capacitor 94, 96 in the opposite direction to the wife ^ 4. 上述PIN二极管D5的阴极侧经由高频线圏97以及电容98接地。 The cathode side of the PIN diode D5 and a capacitor 97 rings of the high-frequency line 98 is grounded via. 上述高频线圏97与电容98的连接点与上述高频线圏76与电容77的连接点连接。 Rings of the high-frequency line 97 and the connection point of the rings of the capacitor 98 and the capacitor 76 is connected to the connection point of the high-frequency line 77.

上迷iflr出端子100经由电阻101 "f妾:地,同时,经由电阻102、顺方向连接的PIN 二极管D6以及电容103接地。上述PIN 二极管D6的阴极侧与上述电阻95与电容96的连接点连接。 The above-iflr out 100 via the resistor 101 "f concubine terminal: Meanwhile, via 102, the PIN diode D6 and a capacitor 103 to ground in the forward direction is connected to the cathode side of the PIN diode D6 is resistance of the resistor 95 and the capacitor connection point 96, the connection.

另外,电源线的+E电压经由电阻104、 105提供给上述输出端子100。 Further, + E voltage supply line via a resistor 104, 105 is supplied to the output terminal 100. 上述电阻104和105的连接点经由电容106接地。 Point 104 and the resistor 105 is connected to ground via a capacitor 106.

这样,上述电压比较器124的比较输出电压、即从比较器125经由电阻42输出的电压,经由高频线圏107提供给上述PIN二极管D4的阳极。 Thus, the above-described voltage comparator 124 compares the output voltage, i.e. the comparator 125 through the voltage output from the resistor 42, supplied to the anode of the PIN diode D4 via the rings of the high-frequency line 107. 上述高频线圏与电阻42的连接点经由电容108接地。 Rings of the high-frequency line 42 and the connection point of the resistors via a capacitor 108 to ground.

如上那样构成的信号电平调整器14通过PIN二极管D1〜D3、 D4〜D6 分别构成7T型的可变衰减器,调整通过信号的电平。 Adjusting as above the signal level constituted by a PIN diode 14 D1~D3, D4~D6 constitute 7T-type variable attenuator, by adjusting the level of the signal. 信号的衰减部分由晶体管Trl、 Tr2放大补偿。 Attenuated portion of the signal by the transistor Trl, Tr2 zoom compensation.

上迷PIN二极管D1〜D6,按照PIN二极管D4—高频线圏92、 91 —PIN 二极管D1 —电阻72 —PIN二极管D2、 D3—电阻74—高频线圏76、 97 —PIN 二极管D5 —电阻95PIN 二极管D6 —电阻102 、 105、 104的顺序直流性的连接,通过由电压比较器124经高频线圏107得到的比较输出电压来控制偏转, 由此变化电感值,可调整通过的信号电平。 The above-PIN diode D1~D6, the high-frequency lines according to the PIN diode D4- rings of 92, 91 -PIN diodes D1 - resistor 72 -PIN diode D2, D3- resistance 74- rings of the high-frequency lines 76, 97 -PIN diode D5 - Resistance 95PIN diode D6 - resistor 102, 105, the order of DC connector 104 via the signal voltage comparator 124 compares the output voltage via the rings of the high-frequency line 107 to control the deflection obtained, whereby the change in inductance value, adjustable by the level.

这时,PIN二极管D1、 D4,通过由电压比较器124经高频线圈107得到的比较输出电压产生顺方向偏转,由此控制电感值。 In this case, PIN diodes D1, D4, the forward direction is generated by comparing the output voltage deflected by the voltage comparator 124 obtained by the high frequency coil 107, thereby controlling the inductance value. 而PIN二极管D2、 D3、 D5、 D6,通过从电源线经由电阻104、 105以及电阻102在PIN 二极管D6 的阳极侧产生一定的顺方向偏转,以及从电压比较器124经由PIN二极管D4、 Dl在阴极侧产生的反方向的偏转控制电感值。 The PIN diodes D2, D3, D5, D6, through, 105 and the resistor 102 have some forward direction on the anode side of the PIN diode D6 from the power line via a resistor 104 is deflected and the voltage comparator 124 via the PIN diodes D4, Dl in deflection in the opposite direction on the cathode side generated by the control inductance.

即,如果高频放大器15输出的2次失真分量小,检波器23检测的信号的电平与基准电压源126提供的基准电压相比小,则比较器125的输出电压变高。 That is, if the secondary distortion of high frequency amplifier 15 the output of a small component, the reference voltage level of the reference voltage source 23, signal detector 126 provides the detected small compared, the output voltage of the comparator 125 becomes high. 如杲该比较器125的输出电压变高,则信号电平调整器14的PIN二极管D1、 D4的电感值变小,同时PIN二极管D2、 D3、 D5、 D6的电感值增大, 信号电平调整器14中的信号衰减量变小。 The output voltage of the comparator 125 Gao is high, the signal level adjuster PIN diodes D1 14, the inductance value D4 becomes smaller, while the PIN diodes D2, D3, D5, D6 inductance value increases, the signal level the regulator 14 becomes small signal attenuation. 结果,高频放大器15输出的信号的电平增大。 As a result, the level of the signal output from the high frequency amplifier 15 is increased.

然而,如果高频放大器15输出的2次失真分量在预先设定的电平以上, 即,检波器23检测出的信号的电平比基准电压源126提供的基准电压大,则比较器125的输出电压降低。 However, the level of the signal if the secondary distortion component output from the high frequency amplifier 15 is above a predetermined level, i.e., the detector 23 detects a voltage larger than the reference provided by the reference voltage source 126, the comparator 125 output voltage. 比较器125的输出电压降低,则信号电平调整器14的PIN二极管D1、 D4的电感值变大,同时PIN二极管D2、 D3、 D5、 D6的电感值减少,信号电平调整器14中的信号衰减量变大。 Output voltage of comparator 125 is reduced, the signal level adjuster PIN diode Dl 14, D4 inductance value becomes large, while the PIN diodes D2, D3, D5, inductance value D6 is reduced, the signal level adjuster 14 signal attenuation becomes large. 结果,高频放大器15的输出信号的电平减少。 As a result, the output signal level of the high frequency amplifier 15 is reduced.

如上那样,使高频放大器15的输出信号包含的失真分量恒久保持一定, 可根据电压比较器124的输出信号自动地调整信号电平调整器14。 As described above, the high frequency amplifier output signal 15 comprises a permanent distortion component remains constant, may automatically adjust the signal level adjusting unit 14 according to the voltage comparator output signal 124.

因此,不需要在高频放大装置112之外确认测定机等设备和电视接收机等的实信号,同时不需要麻烦的调整操作,可得到高品质的接收系统。 Thus, no high-frequency amplifying device in addition to verification device 112 and television receivers real measurement signals, etc., while requiring no troublesome adjustment operation, to obtain high-quality reception system.

在上述实施方式中表示了通过失真^r测自动调整电路12(M企测2次失真分量及调整信号电平调整器14的情况,检测的失真分量当然可以是2次失真分量,按照使用用途选择检测的失真分量为3次、4次直至多次,可进行正确的判断,并可进行适当的处理。即,通过检测电视播放频道的频带之外产生的失真分量,可以不受其他频道影响,可切实检测失真分量,调整信号电平调整器14。 Expressed in the above-described embodiment ^ r measured automatically adjusts the circuit 12 (M prices measured twice distortion component and adjusting the signal level adjusting unit 14 by the distortion, the distortion component detected may of course be two times the distortion component, in accordance with the intended use selecting the detected distortion component is 3 times, 4 times until a plurality of times, correct judgment can be performed, and appropriate processing. That is, the distortion component outside the frequency band by detecting the generated television channels, other channels may not affect , can be reliably detected distortion component, adjustment of the signal level adjuster 14.

在检测的失真分量小的情况下,如图7所示通过在检波器23之前插入检测频带的放大器22,可切实进行失真分量的检测。 At low distortion component detected case, as shown in FIG 22, it can be reliably detected by the distortion component detection band amplifier inserted before the detector 23. 而在检测的失真分量大的情况下,不需要》丈大器22,而且可考虑插入衰减电路。 In large distortion component detected case, no "feet amplifier 22, and the insertion loss circuit may be considered.

而且,在上述实施方式中,自动控制信号电平以便不产生妨害波,在发生妨害波的情况下,也可以同时通过例如LED (Light Emitting Diode:发光二极管)等的显示灯、蜂鸣器、声音或震动等通知操作者。 Further, in the above embodiment, the automatic level control signal so as not to prejudice generate waves, in the event of obstruction of waves, may be simultaneously by, for example LED (Light Emitting Diode: LED) such as a display lamp, a buzzer, such as sound or vibration to notify the operator.

而且,在上述实施方式中,是在产生了妨害波的情况下自动地控制,也可以使其作为保护电路动作,以防止由于向高频放大电路的半导体元件等的过输入造成的破坏。 Further, in the above-described embodiment, is generated in the case of automatically controlled prejudice wave, it may be used as the protection circuit to prevent damage due to an excessive input to the amplifier circuit of the semiconductor element caused by high frequency. 在这种情况下,由于目的不是抑制因为失真造成的图像妨害,所以将上述比较器125的基准电压电平设定为适应该目的的电平。 In this case, since the purpose is not suppressed because the image distortion caused by obstruction, the reference voltage level of the comparator 125 is set to adapt to the level of the object.

而且,上述实施方式中的失真检测自动调整电路120,通过低通滤波器21从高频放大器15的输出信号中提取超过设定电平的设定频带外的失真分量,另外,例如通过低通滤波器21提取低电平的失真分量,此后,由电压比较器124从检波器23的4佥波输出中检测高于设定电平的失真分量并进行信号电平调整器14的调整也可以。 Further, the above embodiment detects the distortion of the automatic adjusting circuit 120, a distortion component extracted out of the set band exceeds a set level of the output signal from the high-frequency amplifier 15 through the low pass filter 21, Further, for example, by a low-pass adjusting filter 21 extracts a distortion component of a low level, thereafter, is detected by the voltage comparator 124 from the output of the detector 4 Qian wave 23 is set higher than the level of the distortion component and signal level adjuster 14 may also be .

而且,上述实施方式中表示了接收和放大电视播放电波的情况,另外, 对于用于例如无线通信机的放大器,也可以与上述实施方式同样进行实施。 Further, the above embodiment shows a case where the received and amplified wave television broadcast, in addition, for a wireless communication device such as an amplifier, can be carried out similarly with the above-described embodiment.

Claims (5)

  1. 1.一种高频放大装置,包括: 高频放大器,对第1频带进行放大; 分波部件,将多个频道的输入信号被输入到所述高频放大器而在所述高频放大器的输出中产生的第1频带的3次失真分量的信号,和在第2频带中产生的2次失真分量的信号,在所述高频放大器的输出中,通过滤波器分波并分离为第1频带和第2频带; 检波部件,对由所述分波部件分波后的包含2次失真分量的第2频带的信号进行检波; 报告部件,在所述检波部件中的检波输出的电压电平在规定值以上时,报告产生了失真。 1. A high-frequency amplifying device, comprising: a high frequency amplifier for amplifying the first frequency band; demultiplexing means, the input signal inputted to the plurality of channels are output in the high-frequency amplifier and the high-frequency amplifier 3 times the signal of the first frequency band distortion component generated in, and the secondary distortion component generated in the second frequency band signal, the output of the high-frequency amplifier, the duplexer through a filter and separated into a first frequency band and a second frequency band; detecting means, a signal comprising a second frequency band twice the distortion component demultiplexed by said demultiplexing means performs detection; reporting component, the voltage level of the detection output of said detection means in the when the predetermined value or more, the report produced a distortion.
  2. 2. 如权利要求1所述的高频放大装置,还包括: 调整部件,调整所述第l频带的输入信号电平。 2. The high-frequency amplifying device of claim 1, further comprising: adjusting means adjusting the input signal level of the l-band.
  3. 3. —种高频放大装置,包括: 高频放大器,对第l频带进行放大;分波部件,将多个频道的输入信号被输入到所述高频放大器而在所述高频放大器的输出中产生的第1频带的3次失真分量的信号,和在第2频带中产生的2次失真分量的信号,在所述高频放大器的输出中,通过滤波器分波并分离为第1频带和第2频带;检波部件,对由所述分波部件分波后的包含2次失真分量的第2频带的信号进行检波;调整部件,调整所述第1频带的输入信号电平;控制部件,在判定为所述检波部件中的检波输出的电压电平未达到规定值时,控制所述调整部件使所述输入信号电平增大,在判定为在规定值以上时,控制所述调整部件使所述输入信号电平减少。 3 - Species high-frequency amplifying apparatus comprising: a high-frequency amplifier for amplifying the first frequency band l; demultiplexing means, the input signal into a plurality of channels is input to the high-frequency amplifier and the output of the high-frequency amplifier 3 times the signal of the first frequency band distortion component generated in, and the secondary distortion component generated in the second frequency band signal, the output of the high-frequency amplifier, the duplexer through a filter and separated into a first frequency band and a second frequency band; detecting means, a signal comprising a second frequency band twice the distortion component demultiplexed by said demultiplexing means performs detection; adjusting means adjusting the input signal level of the first frequency band; control means when it is determined that the detection output of the detecting member does not reach the voltage level of a predetermined value, said control means adjusting the input signal level is increased, is determined as a predetermined value or higher, the adjustment control It means that the input signal level is reduced.
  4. 4. 如权利要求3所述的高频放大装置,所述控制部件包括:比较器,将所述检波输出的电压电平与基准电压电平比專交,所述调整部件,基于所述比较器的输出被控制。 The high-frequency amplifying device according to claim 3, said control means comprising: a comparator which compares the voltage level of the reference voltage level than the special cross detection output, the adjusting means based on the comparison output is controlled.
  5. 5. 如权利要求4所述的高频放大装置,还包括:i殳定部件,可变地纟殳定所述基准电压电平。 4 The high-frequency amplifying apparatus according to claim, further comprising: i Shu fixed member, the variable Si Shu predetermined reference voltage level.
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