CN1531193A - Distortion detector and high-frequency amplifier therewith - Google Patents
Distortion detector and high-frequency amplifier therewith Download PDFInfo
- Publication number
- CN1531193A CN1531193A CNA2004100283844A CN200410028384A CN1531193A CN 1531193 A CN1531193 A CN 1531193A CN A2004100283844 A CNA2004100283844 A CN A2004100283844A CN 200410028384 A CN200410028384 A CN 200410028384A CN 1531193 A CN1531193 A CN 1531193A
- Authority
- CN
- China
- Prior art keywords
- signal
- distortion
- component
- distortion component
- setting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
To make a quantitative adjustment possible, which does not require confirmation with a real signal, can largely improve the working efficiency, and is not influenced by operator's subjectivity. A high-frequency amplification device 12 adjusts a received signal from an antenna 11 by a signal level regulator 14, then amplifies by a high-frequency amplifier 15, and outputs it from an output terminal 17 through a high-pass filter 16. The device takes out a signal out of a setting band including a distortion component relating to a distortion component which occurs in the setting band out of output signals of the high-frequency amplifier, amplifies it by an amplifier 22, then detects by a detector 23, and inputs it to a display driving part 24. The display driving part 24 turns on a display lamp 25 if a secondary distortion component more than a setting level is extracted, and notices occurrence of video image disturbance to a working people. By this method, the working people sets the received signal level by adjusting the signal level until the display lamp turns off. (C)2005,JPO&NCIPI.
Description
Technical field
The present invention relates to detect and be used for for example televising the distortion detection device of the distortion that the high-frequency amplifier of the receiving equipment of electric wave and wireless communication machine etc. produces and high frequency amplifying apparatus with distortion detection function.
Background technology
Now, in the television receiver or shared TV receiving system in the general family, under the low situation of the signal level of received signal, use No. 3239105 disclosed such high frequency amplifying apparatus of Japan Patent (Block one ス ) to amplify received signal.
In above-mentioned high frequency amplifying apparatus, the received signal level height that amplifies, if the output level after amplifying more than the performance of amplifier, then because nonlinear distortion produces distortion component, produces impairment for image or sound and digital signal at self channel or other channels.For the impairment that prevents that such distortion from producing, existing high frequency amplifying apparatus has the signal level adjuster, can adjust the level of input signal.
Fig. 9 is the structure example of the existing high frequency amplifying apparatus of expression.In Fig. 9, the 1st, receive the antenna of the electric wave of televising, the signal that this antenna 1 receives is input to the input terminal 3 of high frequency amplifying apparatus 2.Above-mentioned high frequency amplifying apparatus 2 has signal level adjuster 4 and amplifier 5, and amplifier 5 is adjusted and be input to the signal that is input to above-mentioned input terminal 3 by signal level adjuster 4.The signal that amplifier 5 is adjusted signal level adjuster 4 amplifies, and outputs to television receiver by lead-out terminal 6.
Under the situation that above-mentioned high frequency amplifying apparatus 2 is set, on one side the operator confirms image and harmless evil of sound and output level in the television receiver, Yi Bian adjust signal level adjuster 4.As mentioned above, by adjusting signal level adjuster 4, the output signal level of setting high frequency amplifying apparatus 2 is an optimum value, can prevent the generation of distortion component.
In above-mentioned high frequency amplifying apparatus 2, adjust under the situation of signal level adjuster 4, the analyzer (spectrum analyzer etc.) that must preparation can confirm the impairment ripple that produces, perhaps must utilize actual television receiver and sensing equipment etc., confirm image, sound and signal waveform, bit error rate (BER) etc. on one side, Yi Bian adjust.
But, the place to place of TV receiving apparatus, usually, on eaves and the situation of eminence etc. many, and must adjust the equipment that is used to confirm and the amplifier installation of the equipment that is used to confirm does not wait on hand, it is many to adjust exceedingly difficult situation.And owing to be to be subjected to operator's level of skill to influence more operation, the operation of therefore adjusting the output level of high frequency amplifying apparatus 2 when television reception is one of important operation.
Summary of the invention
Therefore, the 1st purpose of the present invention is to provide a kind of distortion detection device and high frequency amplifying apparatus, do not need to confirm the real signal of expensive sensing equipment and television receiver etc. and significantly improve operating efficiency, and the quantitative adjustment that not influenced by operator's subjectivity.
In addition, the 2nd purpose of the present invention is to provide a kind of distortion detection device and high frequency amplifying apparatus, receives detected distortion generation in the high-frequency amplifier, adjusts the level that is input to the signal in the high-frequency amplifier automatically, can avoid the generation of distortion, not need the adjustment operation of trouble.
In order to realize the 1st above-mentioned purpose, according to the present invention, provide a kind of amplifying device that is arranged on the electronic equipment prime, comprising:
Amplifier unit amplifies the 1st signal and generates the 2nd signal;
The 1st fen parts for wave, the 3rd signal partial wave with in the 1st frequency band of described the 2nd signal outputs to described electronic equipment;
Divide parts for wave, with the 4th signal that results from the 2nd frequency band of the 1st distortion component and relevant the 2nd distortion component generation in the 1st frequency band of described the 2nd signal, from the 2nd signal partial wave;
Demodulation component judges that described the 2nd distortion component in described the 4th signal is whether more than setting;
Reporting unit is judged described the 2nd distortion component when setting is above at described demodulation component, reports in described the 2nd signal to have produced distortion.
By the situation of above-mentioned amplifier unit amplification as the ripple of for example televising of the 1st signal, when if the input of amplifier unit became input above suitable level, between image carrier wave and sound carrier or a plurality of TV signal, produce the distortion component repeatedly of 2 distortions, 3 distortions etc., the TV signal generation of this ripple frequency band of televising (the 1st frequency band) is harmed.Because the difference signal component as 2 ripples of one of 2 distortion components results from the frequency band lower than the frequency band of televising (the 2nd frequency band),, on level, keeps the generation of correlation ground with described impairment wave component though do not become the impairment of TV signal in fact.
In the output signal of above-mentioned amplifier unit (the 2nd signal), as for example 2 distortion components of above-mentioned the 2nd distortion component by minute parts for wave partial wave and be input to demodulation component.This demodulation component is transformed to 2 distortion component detections of above-mentioned minute parts for wave partial wave DC component and outputs to reporting unit.This report parts are not reported for than the little normal condition of predefined level the time at the level of 2 distortion components of above-mentioned amplifier unit output, but accuse at the above Times of predefined level at the level of above-mentioned 2 distortion components and to have given birth to distortion, the distortion that allows the operator know that the output signal owing to amplifier unit comprises produces image impairment etc.The operator adjusts the incoming level of amplifier unit etc. by the generation of above-mentioned reporting unit affirmation distortion.
Outside the frequency band of televising, detect distortion component like that by above-mentioned, can judge whether produced the impairment ripple in the frequency band, not influenced by other channel ground, detect distortion component conscientiously.Therefore, do not need to confirm in addition the real signal of equipment such as mensuration machine and television receiver etc., can significantly improve operating efficiency, and can not be subjected to the quantitative adjustment about operator's subjectivity, can obtain high-quality receiving system.
In order to realize the 2nd above-mentioned purpose, according to the present invention, provide a kind of amplifying device that is arranged on the electronic equipment prime, comprising:
Amplifier unit amplifies the 1st signal and generates the 2nd signal;
The 1st fen parts for wave, the 3rd signal partial wave with in the 1st frequency band of described the 2nd signal outputs to described electronic equipment;
Divide parts for wave, with the 4th signal that results from the 2nd frequency band of the 1st distortion component and relevant the 2nd distortion component generation in the 1st frequency band of described the 2nd signal, from the 2nd signal partial wave;
Adjustment component is adjusted the incoming level of described the 1st signal;
Control assembly, judge that described the 2nd distortion component in described the 4th signal whether more than setting, is judged to be when not reaching setting, control described adjustment component described incoming level is increased, be judged to be when setting is above, control described adjustment component described incoming level is reduced.
Under the situation of above-mentioned amplifier unit amplification as the ripple of for example televising of the 1st signal, if when the input of amplifier unit became input above suitable level, between image carrier wave and sound carrier or a plurality of TV signal, produce the distortion component repeatedly of 2 distortions, 3 distortions etc., the TV signal generation of this ripple frequency band of televising (the 1st frequency band) is harmed.Because the difference signal component as 2 ripples of one of 2 distortion components results from the frequency band lower than the frequency band of televising (the 2nd frequency band), so, on level, keeps the generation of correlation ground with described impairment wave component though do not become the impairment of TV signal in fact.
In the output signal of above-mentioned amplifier unit (the 2nd signal), will and be input to control assembly as for example 2 distortion component partial waves of above-mentioned the 2nd distortion component.This control assembly by comparator relatively with 2 distortion components of partial wave and reference voltage, according to the level of comparative result adjustment to the input signal of amplifier unit.
Like that control assembly is based on the output signal of wave detector by above-mentioned, will can avoid the generation of distortion in the amplifier unit thus to the suitable level of the constant maintenance of level of the input signal of amplifier unit.Therefore, do not need to confirm in addition the real signal of equipment such as mensuration machine and television receiver etc., do not need the adjustment operation of trouble simultaneously, can obtain high-quality receiving system.
Description of drawings
Fig. 1 is the block diagram of all formations of the high frequency amplifying apparatus of the expression embodiment of the invention 1.
Fig. 2 is the figure of distortion detection action that originally is used for the high frequency amplifying apparatus of key diagram 1.
Fig. 3 is the figure of 3 distorted characteristics when 2 ripples are imported in the expression television reception amplifier.
Fig. 4 is the figure of 2 distorted characteristics when 2 ripples are imported in the expression television reception amplifier.
Fig. 5 A is result's the figure of the relation of the output level measured when the incoming frequency of television reception amplifier is 611MHz, 617MHz of expression and 3 distortions.
Fig. 5 B is result's the figure of the relation of the output level measured when being 611MHz, 617MHz of the incoming frequency of expression television reception amplifier and 2 distortions.
Fig. 6 is the figure that the measurement result pictorialization among Fig. 5 is represented.
Fig. 7 is the block diagram of all formations of the high frequency amplifying apparatus of the expression embodiment of the invention 2.
Fig. 8 is the figure of the details of signal level adjuster and distortion detection automatic circuit in the high frequency amplifying apparatus of presentation graphs 7.
Fig. 9 is the block diagram of the formation of the existing high frequency amplifying apparatus of expression.
Embodiment
Below, with reference to accompanying drawing preferred forms of the present invention is described.
Fig. 1 represents the high frequency amplifying apparatus 12 of the embodiment of the invention 1.The 11st, receive the antenna of the electric wave of televising, the signal that this antenna 11 receives is input to the input terminal 13 of high frequency amplifying apparatus 12.Described high frequency amplifying apparatus 12 is carried out signal level adjuster 14 and the high-frequency amplifier 15 that level is adjusted but have manual operation, and high-frequency amplifier 15 is adjusted and be input to the signal that is input to above-mentioned input terminal 13 by signal level adjuster 14.This high-frequency amplifier 15, for example be to use A level amplifying circuit, the signal that signal level adjuster 14 is adjusted is for example play (the VHF of 76～90MHz), 1～12 channel (90～108MHz, 170～222MHz) even the UHF signal of televising that televises by the FM of being enlarged into shown in Figure 2, via channel-splitting filter, the high pass filter (HPF) 16 that the signal of the above frequency of 70MHz is passed through, output to the electronic equipment of back level by lead-out terminal 17, for example television receiver etc.
Be connected distortion detection circuit 20 between above-mentioned high-frequency amplifier 15 and the high pass filter 16.This distortion detection circuit 20 is from the signal of high-frequency amplifier 15 outputs, via channel-splitting filter, the low pass filter (LPF) 21 that the signal of the following frequency of 40MHz is passed through takes out and comprises the out-of-band signal of setting of setting the distortion component that produces in the frequency band and relevant distortion component.And the output signal of this low pass filter 21 by wave detector 23 detections, is input to display driver circuit 24 after being amplified by amplifier 22.This display driver circuit 24, based on the output signal of wave detector 23, display driver is LED (LightEmitting Diode: etc. display lamp 25 light-emitting diode) for example.
In above-mentioned structure, receive the signal of televising via antenna 11, be input to high frequency amplifying apparatus 12.The signal that high frequency amplifying apparatus 12 receives antenna 11 amplifies at high-frequency amplifier 15 after signal level adjuster 14 is adjusted, and outputs to television receiver etc. via high pass filter 16 from lead-out terminal 17.
Because the nonlinear distortion of above-mentioned high-frequency amplifier 15,3 distortions of the TV receiving signal of 2 ripples for example take place and image takes place and during the situation of the impairment of sound, 2 distortions of dependency relation take place to have with this 3 distortions.Above-mentioned 3 distortions produce in the frequency band of TV signal, but 2 distortions are the frequencies lower than the frequency band of TV signal, for example are to be created in the following frequency band of 40MHz.
At this moment, if the level of 2 distortion components of high-frequency amplifier 15 outputs is normal conditions lower than predetermined level, then display driver circuit 24 is failure to actuate, and does not drive display lamp 25.But, if the level of 2 distortion components of high-frequency amplifier 15 outputs is more than predetermined level, then display driver circuit 24 is according to above-mentioned 2 distortion components, drive also and light display lamp 25, the operator is known because the distortion that the output signal of high-frequency amplifier 15 comprises produces the image impairment.
The operator lights according to above-mentioned display lamp 25, produces distortion in the output signal of affirmation high-frequency amplifier 15, before display lamp 25 is turned off the light, adjusts received signal levels by signal level adjuster 14.
Be described in more detail the distortion that produces in the above-mentioned high-frequency amplifier 15 with reference to Fig. 2.Here investigate the distortion that produces in 8,10,12 channels of VHF TV for example.
8, the image frequency f of 10,12 channels
8, f
10, f
12For
f
8：193.25MHz
f
10：205.25MHz
f
12：217.25MHz
3 distortion component H3 in above-mentioned 8 channels and 10 channels are
H3＝2×f
10-f
8
＝2×205.25(MHz)-193.25(MHz)
＝217.25(MHz)
＝f
12
3 distortion component H3 in above-mentioned such 8 channels and 10 channels are 217.25MHz, and are consistent with the image frequency of 12 channels, and the signal of video signal generation of 12 channels is harmed.
And 2 distortion component H2 in above-mentioned 8 channels and 10 channels are
H2＝f
10-f
8
＝205.25(MHz)-193.25(MHz)
＝12(MHz)
2 distortion component H2 in above-mentioned such 8 channels and 10 channels are 12MHz, below 40MHz, that is, beyond the frequency band of channel of televising, and have dependency relation with 3 distortion component H3.
The figure of 3 distorted characteristics when Fig. 3 is the 2 ripples input of the actual television reception amplifier of expression, the output level of the transverse axis number of winning the confidence (dB μ), the longitudinal axis is got 3 distortions (dB).The part of a is represented input signal to the range of linearity of 3 distortions to change at 1: 3 among the figure, and the part of b represents that input signal is to 3 distortions nonlinear area to change at 1: 3 no longer.The performance of the television reception amplifier of said determination, when receiving, expression be not subjected to distortion the impairment signal influence and 3 distortions of specification (intermodulation distortion) of exportable performance can be guaranteed-Maximum Output Level of 52dB, be 105dB μ as can be known from the distorted characteristic of above-mentioned Fig. 3.
Fig. 4 is the figure of 2 distorted characteristics in 2 ripples when input of the above-mentioned television reception amplifier of expression, the output level of the transverse axis number of winning the confidence (dB μ), and the longitudinal axis is got 3 distortions (dB).The part of c is represented input signal to the range of linearity of 2 distortions to change at 1: 2 among the figure, and the part of d represents that input signal is to 2 distortions nonlinear area to change at 1: 2 no longer.The a zone of above-mentioned 3 distortions and the c zone of 2 distortions all are the ranges of linearity, have dependency relation.
TV with 3 distortions of standard (intermodulation distortion) of high frequency amplifying apparatus be-52dB about, can guarantee this-Maximum Output Level of amplifying device about 52dB is about 105～110dB μ.And the output level of 2 distortions of the amplifying device suitable with this 3 distortions is 50dB μ.Therefore, distortion detection circuit 20 extracts 2 distortion components that surpass 50dB μ by low pass filter 21 from the output signal of high-frequency amplifier 15, by wave detector 23 detections and light display lamp 25.
Usually, in the television reception amplifier, distortion causes impairment and brings the point of the output level of problem to television image is the relevant point of getting 2 distortions and 3 distortions, the scope that obtains like this is in the zone of c of a of Fig. 3 and Fig. 4, thereby the distortion component level that detects in this range of linearity is just passable.But, when 3 distortions are positioned at the frequency band of television channel,, then may also detect the signal of other channels if detect 3 distortions.Therefore, in the present embodiment,, detect the impairment ripple that produces in the frequency band by outside the frequency band of television channel, detecting 2 distortions that dependency relation is arranged with 3 distortions.As a result, not influenced by other channels, can detect distortion component conscientiously.
Therefore, need outside high frequency amplifying apparatus 12, not confirm the real signal of equipment such as mensuration machine and television receiver etc., can significantly improve operating efficiency, and can not be subjected to the quantitative adjustment about operator's subjectivity, can obtain high-quality receiving system.
Distorted characteristic in the VHF television channel of television reception amplifier shown in above-mentioned Fig. 3 and Fig. 4 also has dependency relation between 3 distortions and 2 distortions in the UHF television channel.
Fig. 5 A, Fig. 5 B are result's the figure of the relation of the output level measured when being 611MHz (centre frequency of UHF36 channel), 617MHz (centre frequency of UHF37 channel) of the incoming frequency of expression television reception amplifier and 3 times and 2 times distortions.In addition, Fig. 6 is the figure that this measurement result pictorialization is represented.
Can understand that by Fig. 6 the television reception amplifier also has dependency relation between 3 distortions and 2 distortions in the UHF channel.
Above-mentioned such, the repeatedly distortion that amplifier produces for example has the situation of dependency relation between 2 distortions and 3 distortions, " the formula explanation of nonlinear distortion " (38～43 pages) in " the common reception technique of TV " (Japan broadcasts and publishes association's distribution on September 20th, 1974) have been described in detail.
Represented to detect the situation of 2 distortion components in the above-described embodiment by distortion detection circuit 20, the distortion component that detects certainly is 2 distortion components, the distortion component that select to detect according to use be 3 times, 4 times until repeatedly, can judge soundly, and can carry out suitable processing.That is, the distortion component by detection is televised and produced outside the frequency band of channel makes other channels unaffected, can detect distortion component conscientiously.
Under the little situation of the distortion component that detects, by before wave detector 23, inserting the amplifier 22 that detects frequency band, can carry out the detection of distortion component conscientiously as shown in Figure 1.On the contrary, under the big situation of the distortion component that detects, do not need amplifier 22, and can consider to insert attenuator circuit.
And, in the above-described embodiment, show by display lamp 25 notifying operation persons and produced the situation that harms ripple, in addition, also can by buzzer, sound or vibrations untill further notice operator.
And, in the above-described embodiment, show by display lamp 25 notifying operation persons and produced the situation that harms ripple, also can be, promptly harm and light display lamp 25 when ripple does not produce just often, and close the display lamp 25 that goes out when harming ripple producing.In addition, inform whether produce that to harm ripple also passable by the color of display lamp 25.For example also can just often light display lamp 25, when taking place to harm ripple, switch to redness with green.
And, distortion detection circuit 20 in the above-mentioned execution mode, from the output signal of high-frequency amplifier 15, extract the out-of-band distortion component of setting that surpasses the setting level by low pass filter 21, in addition, for example extract low level distortion component by low pass filter 21, after this, it is also passable to be higher than distortion component and the display driver display lamp 25 of setting level by display driver circuit 24 detection from the detection output of wave detector 23.
Fig. 7 represents the high frequency amplifying apparatus 112 of the embodiment of the invention 2.The distortion detection automatic circuit 120 of present embodiment is from the signal of high-frequency amplifier 15 outputs, via low pass filter 21, take out the following distortion component of 40MHz that surpasses specified level, 2 distortion components for example, after amplifying by amplifier 22, by wave detector 23 detections and be transformed to DC component, be input to voltage comparator 124, compare at comparator 125 and the reference voltage that reference voltage source 126 produces, this comparison output signal is fed back to signal level adjuster 14.Structure in addition is identical with the above embodiments 1, and corresponding components is given identical cross reference number, omits their detailed description simultaneously.
In the present embodiment, if 2 distortion components of high-frequency amplifier 15 outputs are lower than predefined level, then voltage comparator 124 promotes the voltage signal level that is used for drive signal level adjuster 14, reaches predefined setting level until 2 distortion components.Yet if the predefined level height of level ratio of 2 distortion components of high-frequency amplifier 15 outputs, voltage comparator 124 reduces the voltage signal that is used for drive signal level adjuster 14.By like this, detect the distortion component that the output signal of high-frequency amplifier 15 comprises, automatic control signal level adjuster 14 can be avoided the generation of distortion in the high-frequency amplifier 15.
The details of above-mentioned signal level adjuster 14 and voltage comparator 124 is described below with reference to Fig. 8.
As mentioned above, voltage comparator 124 comprises comparator 125 and reference voltage source 126.The signal transformation of wave detector 23 detections is that DC component is input to comparator 125-terminal by input terminal 31, and from the reference voltage of reference voltage source 126 offer comparator 125+terminal.
Said reference voltage source 126, be between the power line of+E and ground connection, to be connected electric capacity 32, the series circuit that connects resistance 33, variable resistor 34 and resistance 35 simultaneously, the voltage that takes out from the turn terminal of above-mentioned variable resistor 34 via resistance 36 offer comparator 125+terminal.In addition, comparator 125+be connected electric capacity 37 between terminal and ground connection.
As mentioned above, reference voltage source 126, be by resistance 33, variable resistor 34 and resistance 35 series circuit dividing voltage supply line+voltage of E, from the turn terminal of variable resistor 34 take out branch pressure voltage as reference voltage via resistance 36 offer comparator 125+terminal.The value of said reference voltage can at random be regulated by variable resistor 34, therefore the action of signal level adjuster 14 can be set at proper state.
In addition, above-mentioned comparator 125-resistance 38 and electric capacity 39 are connected in parallel between terminal and the lead-out terminal.And, between the lead-out terminal of comparator 125 and ground connection, be connected electric capacity 40.Above-mentioned comparator 125 relatively by the signal of wave detector 23 detections and the reference voltage that obtains from reference voltage source 126, should compare output voltage and output to signal level adjuster 14 via resistance 42.
Above-mentioned transistor Tr 1, Tr2 are that cascade connects, and the collector electrode of transistor Tr 1 is connected with the emitter of resistance 60 with transistor Tr 2 via high frequency coil 58,59.Above-mentioned high frequency coil 58 and 59 tie point be via electric capacity 61 ground connection, and the tie point of high frequency coil 59 and resistance 60 is via electric capacity 62 ground connection.
Like this, the high-frequency signal that takes out from the collector electrode of transistor Tr 1 via electric capacity 64,65, the PIN diode D1, the electric capacity 66,67 that connect, is input to the base stage of transistor Tr 2 in the other direction.Between the mid point of above-mentioned electric capacity 64,65 and the base stage of transistor Tr 1, be provided with the series circuit of resistance 68,69, high frequency coil 70 is connected in parallel with resistance 69.
The cathode side of above-mentioned PIN diode D1, via resistance 71 ground connection, the while is via the PIN diode D2 and electric capacity 73 ground connection of resistance 72, connection in the other direction.And PIN diode D3 and electric capacity 75 ground connection that the mid point of electric capacity 66,67 connects via resistance 74, suitable direction, simultaneously via high frequency coil 76 and electric capacity 77 ground connection.Like this, the anode of above-mentioned PIN diode D2 is connected with the negative electrode of PIN diode D3.
The base stage of above-mentioned transistor Tr 2 is via resistance 78 ground connection.The voltage of power line+E offers the collector electrode of above-mentioned transistor Tr 2 via resistance 79 and high frequency coil 80.The tie point of above-mentioned resistance 79 and high frequency coil 80 is via electric capacity 90 ground connection.Like this, by the high-frequency signal that above-mentioned transistor Tr 2 is amplified, from the centre tap taking-up of high frequency coil 80, the PIN diode D4 and the electric capacity 82,83 that connect via electric capacity 81, opposite direction output to lead-out terminal 100.
And between the centre tap of the base stage of above-mentioned transistor Tr 2 and high frequency coil 80, series connection is provided with resistance 84,85,86, simultaneously to resistance 84 high frequency coil 87 that is connected in parallel, to resistance 85 high frequency coil 88 that is connected in parallel.In addition, the high frequency coil 91,92 that is connected in series between the negative electrode of the anode of PIN diode D1 and PIN diode D4 simultaneously is provided with electric capacity 93 between the mid point of high frequency coil 91,92 and ground connection.
The cathode side of above-mentioned PIN diode D4 is via the series circuit ground connection of PIN diode D5, resistance 95 and the electric capacity 96 of electric capacity 94, opposite direction connection.The cathode side of above-mentioned PIN diode D5 is via high frequency coil 97 and electric capacity 98 ground connection.Above-mentioned high frequency coil 97 is connected with the tie point of electric capacity 77 with above-mentioned high frequency coil 76 with the tie point of electric capacity 98.
Above-mentioned lead-out terminal 100 is via resistance 101 ground connection, simultaneously, and the PIN diode D6 and electric capacity 103 ground connection that connect via resistance 102, along direction.The cathode side of above-mentioned PIN diode D6 is connected with the tie point of electric capacity 96 with above-mentioned resistance 95.
In addition, power line+E voltage offers above-mentioned lead-out terminal 100 via resistance 104,105.Above-mentioned resistance 104 and 105 tie point are via electric capacity 106 ground connection.
Like this, the comparison output voltage of above-mentioned voltage comparator 124, promptly from the voltage of comparator 125 via resistance 42 output offers the anode of above-mentioned PIN diode D4 via high frequency coil 107.The tie point of above-mentioned high frequency coil and resistance 42 is via electric capacity 108 ground connection.
The signal level adjuster 14 that as above constitutes is like that adjusted the level by signal by the variable attenuator that PIN diode D1～D3, D4～D6 constitute the π type respectively.The decay part of signal is amplified compensation by transistor Tr 1, Tr2.
Above-mentioned PIN diode D1～D6, connection according to the order direct current of PIN diode D4 → high frequency coil 92,91 → PIN diode D1 → resistance, 72 → PIN diode D2, D3 → resistance 74 → high frequency coil 76,97 → PIN diode D5 → resistance 95PIN diode D6 → resistance 102,105,104, by controlling deflection through the comparison output voltage that high frequency coil 107 obtains by voltage comparator 124, change inductance value thus, can adjust the signal level of passing through.
At this moment, PIN diode D1, D4 by being produced along direction deflection through the comparison output voltage that high frequency coil 107 obtains by voltage comparator 124, control inductance value thus.And PIN diode D2, D3, D5, D6, by producing certain suitable direction deflection via resistance 104,105 and resistance 102 in the anode-side of PIN diode D6, and control inductance value via PIN diode D4, D1 in the reciprocal deflection that cathode side produces from voltage comparator 124 from power line.
That is, if 2 distortion components of high-frequency amplifier 15 outputs are little, the level of the signal that wave detector 23 detects is compared little with the reference voltage that reference voltage source 126 provides, and then the output voltage of comparator 125 uprises.If the output voltage of this comparator 125 uprises, then the inductance value of the PIN diode D1 of signal level adjuster 14, D4 diminishes, and the inductance value of PIN diode D2, D3, D5, D6 increases simultaneously, and the signal attenuation in the signal level adjuster 14 diminishes.As a result, the level of the signal of high-frequency amplifier 15 outputs increases.
Yet, if 2 distortion components of high-frequency amplifier 15 output more than predefined level, that is, the reference voltage that the level ratio reference voltage source 126 of wave detector 23 detected signals provides is big, the output voltage of comparator 125 reduces.The output voltage of comparator 125 reduces, and then the inductance value of the PIN diode D1 of signal level adjuster 14, D4 becomes big, and the inductance value of PIN diode D2, D3, D5, D6 reduces simultaneously, and the signal attenuation quantitative change in the signal level adjuster 14 is big.As a result, the output signal level of high-frequency amplifier 15 reduces.
As above such, the permanent maintenance of distortion component that the output signal of high-frequency amplifier 15 is comprised is certain, can automatically adjust signal level adjuster 14 according to the output signal of voltage comparator 124.
Therefore, need outside high frequency amplifying apparatus 112, not confirm the real signal of equipment such as mensuration machine and television receiver etc., not need the adjustment operation of trouble simultaneously, can obtain high-quality receiving system.
Represented situation in the above-described embodiment by distortion detection automatic circuit 2 distortion components of 120 detections and adjustment signal level adjuster 14, the distortion component that detects certainly is 2 distortion components, the distortion component that select to detect according to use be 3 times, 4 times until repeatedly, can judge soundly, and can carry out suitable processing.That is, the distortion component by detection is televised and produced outside the frequency band of channel is not influenced by other channels can, can detect distortion component conscientiously, adjusts signal level adjuster 14.
Under the little situation of the distortion component that detects, by before wave detector 23, inserting the amplifier 22 that detects frequency band, can carry out the detection of distortion component conscientiously as shown in Figure 7.And under the big situation of the distortion component that detects, do not need amplifier 22, and can consider to insert attenuator circuit.
And, in the above-described embodiment, the automatic control signal level is taking place to harm under the situation of ripple so that do not produce the impairment ripple, also can be simultaneously by for example LED (Light Emitting Diode: light-emitting diode) etc. display lamp, buzzer, sound or vibrations untill further notice operator.
And, in the above-described embodiment, be to produce control automatically under the situation that harms ripple, it is moved as protective circuit, to prevent because to the destruction that input causes of crossing of the semiconductor element of high-frequency amplifier circuit etc.In this case, because purpose is not to suppress because the image that distortion causes harms, the reference voltage level of above-mentioned comparator 125 is set at the level that adapts to this purpose.
And, distortion detection automatic circuit 120 in the above-mentioned execution mode, from the output signal of high-frequency amplifier 15, extract the out-of-band distortion component of setting that surpasses the setting level by low pass filter 21, in addition, for example extract low level distortion component by low pass filter 21, after this, detect from the detection of wave detector 23 output by voltage comparator 124 and be higher than the distortion component of setting level and the adjustment of carrying out signal level adjuster 14 is also passable.
And the situation of having represented to receive and amplify the electric wave of televising in the above-mentioned execution mode in addition, for being used for for example amplifier of wireless communication machine, also can be implemented with above-mentioned execution mode equally.
Claims (7)
1. distortion detection device comprises:
Divide parts for wave, with the 2nd signal that results from the 2nd frequency band of the 1st distortion component and relevant the 2nd distortion component generation in the 1st frequency band of the 1st signal of input, from the 1st signal partial wave;
Demodulation component judges that described the 2nd distortion component in described the 2nd signal is whether more than setting;
Reporting unit is judged described the 2nd distortion component when setting is above at described demodulation component, reports in described the 1st signal to have produced distortion.
2. amplifying device that is arranged on the electronic equipment prime comprises:
Amplifier unit amplifies the 1st signal and generates the 2nd signal;
The 1st fen parts for wave, the 3rd signal partial wave with in the 1st frequency band of described the 2nd signal outputs to described electronic equipment;
Divide parts for wave, with the 4th signal that results from the 2nd frequency band of the 1st distortion component and relevant the 2nd distortion component generation in the 1st frequency band of described the 2nd signal, from the 2nd signal partial wave;
Demodulation component judges that described the 2nd distortion component in described the 4th signal is whether more than setting;
Reporting unit is judged described the 2nd distortion component when setting is above at described demodulation component, reports in described the 2nd signal to have produced distortion.
3. amplifying device as claimed in claim 2 also comprises:
Adjustment component is adjusted the incoming level of described the 1st signal.
4. distortion detection device comprises:
Divide parts for wave, with the 2nd signal that results from the 2nd frequency band of the 1st distortion component and relevant the 2nd distortion component generation in the 1st frequency band of the 1st signal of input, from the 1st signal partial wave;
Adjustment component is adjusted the incoming level of described the 1st signal;
Control assembly, judge that described the 2nd distortion component in described the 2nd signal whether more than setting, is judged to be when not reaching setting, control described adjustment component described incoming level is increased, be judged to be when setting is above, control described adjustment component described incoming level is reduced.
5. amplifying device that is arranged on the electronic equipment prime comprises:
Amplifier unit amplifies the 1st signal and generates the 2nd signal;
The 1st fen parts for wave, the 3rd signal partial wave with in the 1st frequency band of described the 2nd signal outputs to described electronic equipment;
Divide parts for wave, with the 4th signal that results from the 2nd frequency band of the 1st distortion component and relevant the 2nd distortion component generation in the 1st frequency band of described the 2nd signal, from the 2nd signal partial wave;
Adjustment component is adjusted the incoming level of described the 1st signal;
Control assembly, judge that described the 2nd distortion component in described the 4th signal whether more than setting, is judged to be when not reaching setting, control described adjustment component described incoming level is increased, be judged to be when setting is above, control described adjustment component described incoming level is reduced.
6. amplifying device as claimed in claim 5,
Described control assembly comprises: comparator, and with described the 4th voltage of signals and reference voltage relatively, whether described the 2nd distortion component in described the 4th signal of output expression the 5th signal more than setting,
Described control assembly is controlled based on described the 5th signal.
7. amplifying device as claimed in claim 6 also comprises:
Set parts is set described reference voltage changeably.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003068190 | 2003-03-13 | ||
| JP068190/03 | 2003-03-13 | ||
| JP068190/2003 | 2003-03-13 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101343272A Division CN101369801B (en) | 2003-03-13 | 2004-03-11 | Distortion sensing means, automatic distortion avoiding device, and amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1531193A true CN1531193A (en) | 2004-09-22 |
| CN100477504C CN100477504C (en) | 2009-04-08 |
Family
ID=34308307
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101343272A Expired - Fee Related CN101369801B (en) | 2003-03-13 | 2004-03-11 | Distortion sensing means, automatic distortion avoiding device, and amplifier |
| CNB2004100283844A Expired - Fee Related CN100477504C (en) | 2003-03-13 | 2004-03-11 | High-frequency amplifier |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101343272A Expired - Fee Related CN101369801B (en) | 2003-03-13 | 2004-03-11 | Distortion sensing means, automatic distortion avoiding device, and amplifier |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2010141921A (en) |
| CN (2) | CN101369801B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332282A (en) * | 2011-07-20 | 2012-01-25 | 深圳市君兰电子有限公司 | Performance detection method and system for DVD modules |
| CN101252378B (en) * | 2008-03-19 | 2012-08-22 | 南京东大宽带通信技术有限公司 | Closed loop automatic level control method and apparatus for TDD mode communicating system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS627280A (en) * | 1985-07-04 | 1987-01-14 | Matsushita Electric Ind Co Ltd | Catv relay amplifier |
| JPS627283A (en) * | 1985-07-04 | 1987-01-14 | Matsushita Electric Ind Co Ltd | Link amplifier |
| JPS63171022U (en) * | 1987-04-25 | 1988-11-08 | ||
| JPH02135906A (en) * | 1988-11-17 | 1990-05-24 | Mitsubishi Electric Corp | Low distortion amplifier |
| JP2908683B2 (en) * | 1993-11-30 | 1999-06-21 | デイエツクスアンテナ株式会社 | Booster for receiving television broadcast signals |
| US5809085A (en) * | 1995-06-28 | 1998-09-15 | Motorola Inc. | Apparatus and method for detecting and discriminating various signal types in the presence of impulse distortions |
| EP1124324A1 (en) * | 2000-02-10 | 2001-08-16 | Alcatel | Method for linearizing, over a wide frequency band, a transmission system comprising a power amplifier |
| KR20020052495A (en) * | 2000-12-26 | 2002-07-04 | 엘지전자 주식회사 | Digital linear apparatus for rf power amplifier |
-
2004
- 2004-03-11 CN CN2008101343272A patent/CN101369801B/en not_active Expired - Fee Related
- 2004-03-11 CN CNB2004100283844A patent/CN100477504C/en not_active Expired - Fee Related
-
2010
- 2010-02-19 JP JP2010034623A patent/JP2010141921A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101252378B (en) * | 2008-03-19 | 2012-08-22 | 南京东大宽带通信技术有限公司 | Closed loop automatic level control method and apparatus for TDD mode communicating system |
| CN102332282A (en) * | 2011-07-20 | 2012-01-25 | 深圳市君兰电子有限公司 | Performance detection method and system for DVD modules |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101369801A (en) | 2009-02-18 |
| JP2010141921A (en) | 2010-06-24 |
| CN100477504C (en) | 2009-04-08 |
| CN101369801B (en) | 2011-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1230989C (en) | Integrated transmitting/receiving radio frequency device | |
| CN101064521A (en) | High-frequency circuit, high-frequency device and communications apparatus | |
| CN1046835C (en) | Stereo FM radio in television receiver | |
| CN1257651C (en) | Radio receiver, radio receiving method and recording medium | |
| CN1577853A (en) | High frequency power amplifier module and semiconductor integrated circuit device | |
| US20120182430A1 (en) | Radio frequency front end for television band receiver and spectrum sensor | |
| CN1628418A (en) | Method and apparatus for optimizing dynamic range of a wideband analog-to-digital converter | |
| CN1898879A (en) | High frequency composite component | |
| CN1929198A (en) | Antenna device and radio communication terminal | |
| CN1623232A (en) | RF amplifier | |
| CN1291386A (en) | Tap antenna unit | |
| CN101056093A (en) | Variable gain amplifier | |
| CN1728570A (en) | Use the radio-frequency transmitter and the radio frequency receiving method of automatic gain controller | |
| CN1190904C (en) | Directly converting receiver | |
| CN1682529A (en) | Receiver device and television receiver | |
| CN1671059A (en) | Satellite broadcasting converter, and detector circuit used therein | |
| CN1531193A (en) | Distortion detector and high-frequency amplifier therewith | |
| CN1494748A (en) | Antenna apparatus and protable apparatus using the same | |
| CN1285653A (en) | Electronic tuner | |
| CN1917596A (en) | Terrestrial-digital multimedia broadcasting and digital audio broadcasting low intermediate frequency receiver | |
| CN1048843C (en) | Radio reception by synthesizing only center frequency information | |
| CN1606829A (en) | Automatic gain control for a tuner | |
| CN1606244A (en) | Receiver for down-conversion of dual band for digital multimedia broadcasting or digital audio broadcasting | |
| CN1489288A (en) | Electronic toning unit | |
| CN1058874A (en) | Mono FM radio in the television receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090408 Termination date: 20120311 |