CN100538370C - The multi-band amplifier that is used for test and sensing device - Google Patents
The multi-band amplifier that is used for test and sensing device Download PDFInfo
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- CN100538370C CN100538370C CNB2006100799946A CN200610079994A CN100538370C CN 100538370 C CN100538370 C CN 100538370C CN B2006100799946 A CNB2006100799946 A CN B2006100799946A CN 200610079994 A CN200610079994 A CN 200610079994A CN 100538370 C CN100538370 C CN 100538370C
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Abstract
A kind of multi-band amplifier that is used for test and sensing device comprises input signal is split into resolver, the amplifier that splits signal, and combination and digitizing amplifying signal form the device of digitized signal.Each amplifier is configured to amplify relevant fractionation signal in an amplifier passband.The amplifier passband of at least one amplifier is different from the amplifier passband of another amplifier.
Description
Cross reference to related application
According to the regulation of 35 U.S.C. § 119 (e), it is 60/676,376 U.S. Provisional Application No. that the present invention requires in the sequence number that on April 29th, 2005 submitted to, by reference its full content is covered among this paper herein.
Technical field
The present invention relates to test and sensing device, more specifically, relate to the multi-band amplifier that is used for test and sensing device.
Background technology
For many years, high-quality audio-frequency amplifier system is worked with the multi-band amplifier structure always.A main cause of this phenomenon is to be difficult to design the single loudspeaker that can cover whole audio band.Therefore, can use different loudspeakers to cover each part of audible spectrum.Yet, compare with single high power amplifier, adopt this structure can also obtain other benefits, for example, use the less amplifier of a plurality of power consumptions to realize identical integral body output, system can obtain more headroom (headroom).On higher power level, because each frequency band is separate in the passage of each amplification, cause the internal modulation distortion to reduce to some extent, thereby system's sounding of these types is more pure.
When being input as broadband signal, test and sensing device also is subjected to the influence of similar problem.For example, in oscillograph, a difficult point making the broadband prime amplifier is between prime amplifier and input signal attenuator to be set.Bandwidth is wide more, just difficultly more keeps good return loss at oscillographic input end.As a result, in expected bandwidth, can not realize 50 ohm build-out resistor usually, thereby make the signal quality variation.
Therefore, still need to be used for the improved multi-band amplifier of test and sensing device.
Summary of the invention
An embodiment comprises the multi-band amplifier that is used for test and sensing device, this amplifier comprises input signal split into resolver (splitter), the amplifier that splits signal (split signal), and combination and digitizing amplifying signal form the device of digitized signal.Each amplifier is configured to amplify relevant fractionation signal in an amplifier passband.The amplifier passband of at least one amplifier is different from the amplifier passband of another amplifier.
Another embodiment comprises test and sensing device, as digital oscillograph or digital quantizer, this instrument comprises the signal input part, the device that is used for the display digit waveform that are used for receiving inputted signal, be used for input signal is split into the device that splits signal, is used to amplify the device that splits signal and the device of the synthetic digitized wave forms of fractionation sets of signals that is used for amplifying.Each splits signal amplifies in the frequency range of an amplification, and wherein, at least one amplification frequency scope that splits signal is different from the amplification frequency scope that another splits signal.
Another embodiment comprises the method for digitized signal, and this method comprises signal split into and splits signal, in relevant frequency range each is split signal and zoom into amplifying signal and amplifying signal is combined into digitized signal.Be different from the frequency range that splits signal correction with another with at least one frequency range that splits signal correction.
Description of drawings
Fig. 1 is the block diagram that is used for the multi-band amplifier of test and sensing device;
Fig. 2 is the block diagram that is used for the multi-band amplifier with a plurality of digital quantizers of test and sensing device;
Fig. 3 is the block diagram that is used for the balanced multi-band amplifier of test and sensing device;
Fig. 4 is the block diagram that is used for the multi-band amplifier with attenuator of test and sensing device;
Fig. 5 is the block diagram that is used for the multi-band amplifier with switch of test and sensing device;
Fig. 6 is the block diagram that is used for the multi-band amplifier with wave filter of test and sensing device;
Fig. 7 is a kind of process flow diagram of test and sensing device with signal digitalized method that be;
Fig. 8 is the process flow diagram of combination amplifying signal;
Fig. 9 is the process flow diagram of another combination amplifying signal; With
Figure 10 is a process flow diagram, it show frequency of utilization response balanced come for test and sensing device with signal digitalized method.
Embodiment
Fig. 1 is the block diagram that is used for the multi-band amplifier of test and sensing device.This multi-band amplifier comprises resolver 10, a plurality of amplifier 16, is used to make up and digitized device 19 and display 25.
Resolver 10 splits into a plurality of fractionation signals 14 with input signal.Resolver 10 can be the multi-channel power divider.An example of multi-channel power divider is resistive power divider or resistive power dispenser.The advantage of resistive power divider is in the bandwidth of broad, can provide 50 ohm good input impedance at the input end of resolver 10.In addition, because the cause of the intrinsic power consumption of resistive power divider, thereby the input and output of resolver are isolated to a certain extent mutually.The quantity of this isolation depends on the number of output and the fractionation ratio of output.This isolation has reduced the influence of any bad input impedance of any parts of the output that is connected to resolver.
Although Fig. 1 shows three and splits signals 14,, will not be limited to any concrete number from the number of the fractionation signal 14 of divider 12.The number that splits signal 14 can be the arbitrary integer greater than 1.
In addition, each amplitude that splits signal 14 needn't equate.For example, the amplifier 16 of being correlated with different fractionation signals 14 can have different gains.As a result, each splits the relative attenuation of signal 14 can be different, to compensate between each amplifier 16 in the difference aspect the gain.
In addition, resolver can be the multiband dividing filter.Such multiband dividing filter can be directed to the energy that occupies different frequency range input signal 12 the difference output of resolver.For example, the frequency that is lower than 10GHz can be exported in first output place on resolver 10, and the frequency that is higher than 10GHz can be exported in second output place on resolver 10.Using the advantage of such multiband dividing filter is to limit the out-of-band signal energy that offers each amplifier 16.The consequence that restriction is input to the frequency spectrum of amplifier 16 is that amplifier 16 will produce internal modulation distortion component still less.Can attenuation band outer frequency component, thereby, any relevant internal modulation distortion component of can decaying, thus the quality of the fractionation signal 20 that amplifies improved.
In the passband of relevant amplifier 16, with this relevant amplifier each is split signal 14 and amplify.The passband of at least one amplifier 16 is different from the passband of another amplifier 16.For example, the frequency between first amplifier 16 scalable 0-5GHz.Frequency between second amplifier 16 scalable 5-10GHz.Frequency between the 3rd amplifier 16 scalable 10-15GHz.Thereby the passband of first amplifier is different from the passband of other two amplifiers.As a result, the different frequency component of input signal 12 amplifies by different amplifiers.
The difficulty of design amplifier increases with the increase of the desired bandwidth of this amplifier.For covering the frequency range in the above-mentioned example, the amplifier that needs is had the 0-15GHz passband.Such amplifier more is difficult to design than the amplifier of the 5GHz bandwidth of using in the above-mentioned example.Thereby for the given desired bandwidth of total system, each amplifier will amplify the wherein part of this bandwidth.Thereby required amplifier has the little bandwidth of system bandwidth than expectation.
Amplify with amplifier that use has a wider bandwidth and to compare, use the amplifier that has than narrow bandwidth to amplify and have many advantages.These advantages comprise that headroom is more, and have strengthened the separation between the frequency.Because have a part of frequency than amplifier 16 amplification input signals 12 of narrow bandwidth, thereby before distortion took place amplifier 16, amplifier 16 can the higher signal of output power.In addition, frequency separation also is improved, because the outer frequency of amplifier passband is amplified.This has reduced any internal modulation distortion component about the output signal of amplifier 16, thereby has improved signal quality.
And, to compare with wide-band amplifier, narrow-band amplifier 16 has more performance in its bandwidth.In addition, narrow-band amplifier can have the passband of the highest frequency scope that exceeds wide-band amplifier.By integrating the passband of narrow-band amplifier 16, can obtain having the composite amplifier of wideer passband and better performance (comparing) with wide-band amplifier.
Be used to make up with digitized device 19 amplifying signal is combined into digitized signal 28.Figure 1 illustrates an example.Be used to make up with digitized device 19 and comprise combiner 18 and digital quantizer 24.Combiner 18 is combined into composite signal 22 with amplifying signal 20.Digital quantizer 24 is digitized into digitized signal 28 with composite signal 22.Similar with resolver 10, combiner 18 can be ohmic power combiner.
Combiner 18 also can be the multiband dividing filter.As combiner, then the fractionation signal of each amplification is connected to relevant input end with this wave filter, and this input end accepts to comprise the frequency in the frequency range of passband of above-mentioned associated amplifier.
In addition, as mentioned above, with regard to resolver 10,, can be provided with as required from respectively inputing to the gain of output for combiner 18.In addition, the gain of resolver 10 and combiner 18 can be set together, on particular path, to realize the gain of expectation.
Fig. 2 is the block diagram that is used for the multi-band amplifier with a plurality of digital quantizers of test and sensing device.In addition, be used to make up with digitized device 19 and can comprise a plurality of digital quantizers 24 and digital combiner 42.The fractionation signal 20 of each amplification is by relevant digital quantizer 24 digitizings.Then, with digital combiner 42 these digitized signals of combination.In example shown in Figure 2, digital combiner 42 is digital summation module.
In this example, the sample rate of digital quantizer 24 can be identical, but not necessarily must be identical.For example, be used for the sample rate that sample rate with the digital quantizer 24 of the number of bandsization of 0-5GHz can be lower than the digital quantizer of the 15-20GHz frequency band that is used to sample.In addition, the sample rate of these digital quantizers can be lower than the final sample rate of digitized signal 28.
Fig. 3 is the block diagram that is used for the balanced multi-band amplifier of test and sensing device.Multi-band amplifier can comprise the frequency response of balanced device 26 equilibriums from the input that inputs to balanced device 26 of resolver 10.Because the parts that use in the multi-band amplifier may be imperfect, thereby the frequency response of this multi-band amplifier may be imperfect.Balanced device 26 can correction of frequency the problem that exists of response, have concurrently as amplitude or phase distortion or both.For example, when making up the fractionation signal 20 that amplifies, any overlapping amplitude or the phase distortion that will cause input signal 12 of the passband of each amplifier 16.In addition, but balanced device 26 compensating non-linear distortions.For example, along with the output power of amplifier 16 is approached its 1dB compression point, reduced the actual gain of amplifier 16.Balanced device 26 can respond the output power that is in the frequency range of being amplified by this amplifier 16 and regulate frequency response in this frequency range.Balanced device 26 can compensate any this class distortion.
Fig. 4 is the block diagram that is used for the multi-band amplifier with attenuator of test and sensing device.Each attenuator can be designed in the frequency range of relevant amplifier 16, move.To be used as the input of relevant amplifier 16 through the signal 32 of overdamping.Generally speaking, design narrow-band attenuator is simpler than design broadband attenuator.In addition, utilize the constantly MEMS technology of development, such narrow-band attenuator will only occupy less relatively space.Thereby the design of attenuator will be more simple, and its space that occupies also will reduce.
Fig. 5 is the block diagram that is used for the multi-band amplifier with switch of test and sensing device.This multi-band amplifier can comprise switch 34.These switches can be controlled the influence of 20 pairs of digitized signals 28 of relevant amplifying signal selectively.In Fig. 5, the output that switch 34 is connected to amplifier 16 is shown.These switches can be the parts of amplifier 16, also can be the parts of combiner 18.Although used the term switch, in this part context, any amplifying signal of controlling can be called switch to the device of the influence of digitized signal.For example, switch can be the circuit of the output of rejective amplifier 16, thereby, eliminated the influence of this output to digitized signal.
In addition, consult Fig. 2, can digitally implement switch 34.Thereby, can switch and one or more digitized amplifying signals, make them not be applied in the digital combiner 43.
By using such switch 34, can allow the user select bandwidth.The user can select some frequency band not to be included in the final power reorganization.As a result, digitized signal will only comprise the subclass of possibility frequency band.Can select the frequency band of any number, comprise and only select a frequency band.And, the selection of frequency band has been caused the frequency band of discontinuous combination.For example, if these frequency bands comprise four frequency bands, 0-5GHz, 5-10GHz, 10-15GHz and 15-20GHz, user can select 0-5GHz, 5-10GHz and this several frequency bands of 15-20GHz, reject the frequency band of 10-15GHz.
The noise that such selection allows user's control to be introduced by multi-band amplifier.For example, use above-mentioned frequency band, if certain specific input signal 12 has the frequency component in 10-15GHz and the 15-20GHz frequency band, then the user can only select these frequency bands, does not select 0-5GHz and 5-10GHz frequency band.As a result, the noise that produces of the amplifier of any passband by 0-5GHz and 5-10GHz will can not be added in the digitized signal 28.
Fig. 6 is the block diagram that is used for the multi-band amplifier with wave filter of test and sensing device.This multi-band amplifier can comprise a plurality of wave filters 38.Before the fractionation signal 14 that will be correlated with was input to relevant amplifier 16,38 pairs in each wave filter should carry out filtering by relevant fractionation signal.Each wave filter 38 can have the filter passbands of the amplifier passband of the amplifier 16 that is substantially equal to be correlated with.As a result, can reduce to incide the frequency range of the fractionation signal 14 of amplifier 16.If resolver 10 is resistive power dispensers, then such reducing is particularly useful.Be input to the frequency spectrum of amplifier 16 by minimizing, reduced the internal modulation distortion component, thereby improved signal quality.
Aforesaid multi-band amplifier can be the part of test and sensing device.A kind of such test and sensing device is the oscillograph platform.Above-mentioned multi-band amplifier also can be the part of digital conversion applicator platform, its fundamental purpose analog waveform is converted to be stored in the storer, with the digital waveform that binary sample is represented, use for test and sensing device.And above-mentioned multi-band amplifier can be the probe that uses with test and sensing device and the part of card module.
An example of such test and sensing device comprises the signal input part that is used for receiving inputted signal, be used for input signal split into a plurality of fractionation signals device, be used to amplify the device that splits signal, be used for the device of the synthetic digitized wave forms of fractionation sets of signals that will amplify and be used for the device of display digit waveform.
Signal input part can be to arrive the input end of resolver 10 as mentioned above.In addition, before entering resolver 10, input signal can pass through some extra parts.
Test and sensing device comprises the device that is used for input signal is split into a plurality of fractionation signals.As mentioned above, input signal 12 can be split by the resolver 10 such as resistive power divider or multiband dividing filter network.In addition, as mentioned above, for each frequency band, the device that is used to split input signal can comprise a corresponding with it wave filter.Similarly, the device that is used to split input signal can comprise aforesaid attenuator.The device that is used to split input signal also can comprise the combination of above-mentioned resolver 10, attenuator 30 and wave filter 38.
Above-mentioned test and sensing device comprises the device that is used to amplify the fractionation signal.This device that is used to amplify amplifies each and splits signal in the passband of amplifying, wherein, at least one passband that splits the amplification of signal is different from the passband that another splits the amplification of signal.This device that is used to amplify can comprise the amplifier of similar structure.For example, all above-mentioned amplifiers all can be the lamped element amplifiers.Yet this device that is used to amplify can comprise heteroid amplifier.For example, some amplifier can be the lamped element amplifier, and other amplifiers can be distributed travelling-wave amplifiers.In addition, some amplifier can be made of discrete component, and other amplifiers can be the integrated circuit of monolithic.
As mentioned above, the device that the fractionation sets of signals that is used for amplifying is synthesized digitized wave forms can comprise combiner and digital quantizer, or a plurality of digital quantizer and a digital combiner.Yet this device that is used to make up also can comprise the combination of said apparatus.For example, can make up the fractionation signal of a plurality of amplifications, then, be digitized into the sandwich digit signal.Can the fractionation of a plurality of other amplifications is signal digitalized, then they and above-mentioned sandwich digit signal are made up.
Above-mentioned test and sensing device comprises the device that is used for the display digit waveform.Such device can comprise the storer of video display, storage digitized wave forms, or with the interface of display device.For example, video display can be CRT monitor or LCD display.Above-mentioned interface can comprise the communication connection interface that test and sensing device is connected to computing machine.
Above-mentioned test and sensing device can comprise that be used to select will be by the device of the subclass of the fractionation signal of the amplification of composite set combination.For example, this device that is used to select can comprise the mechanical switch that the output of the device that is used to amplify is controlled.This device that is used to select can comprise the selection that realizes with digital form.For example, before will splitting the synthetic digitized signal of sets of signals, the device that is used to make up the fractionation signal of amplification can split these signal digitalized.The device that is used to select can only be selected a subclass of these signals that will carry out combination of numbers, or allows the non-selected signal times be zero zoom factor with the value.As a result, in combination, only used selecteed signal.
Fig. 7 is a kind of process flow diagram of test and sensing device with signal digitalized method that be.The method of this digitized signal is included in 60 signal is split into the fractionation signal, in 62 each is split signal and amplifies in relevant frequency range, to form amplifying signal and in 64 amplifying signal to be combined into digitized signal.Be different from the frequency range that splits signal correction with another with at least one frequency range that splits signal correction.
After in 60 signal being split, the frequency spectrum that splits signal can become mutually the same basically.For example, use the resistive power divider that signal is split into and split the fractionation signal that signal can cause having essentially identical frequency spectrum.Yet those skilled in the art will understand, because the cause of non-ideal components, the frequency spectrum that causes splitting signal is incomplete same.And, if the relative amplitude of the frequency component of a frequency spectrum is identical with the relative amplitude of the frequency component of another frequency spectrum, think that then these two frequency spectrums are basic identical.For example, if resistive power resolver has uneven fractionation ratio, then because this splits the cause of ratio, the absolute amplitude of the frequency component of fractionation signal is with inequality, but the relative amplitude of these frequency components is with mutually the same.
In addition, splitting signal in 60 can comprise signal is split into the fractionation signal that does not have similar frequency spectrum entirely.Signal can be split into a plurality of frequency bands, and wherein, each splits signal has from frequency component above-mentioned signal, that occupy a frequency band.Signal also can be split into the fractionation signal, wherein has only a fractionation signal to have and is different from the frequency spectrum that other splits signal.For example, the signal with frequency component of 0-20GHz can be split into four and split signal, and wherein, three split the signal frequency span is 0-15GHz, and one splits the signal frequency span is 15-20GHz.And above-mentioned frequency band can be discontinuous.For example, signal can be split into two frequency bands, one of them scope is 2-8GHz, and another scope is 12-18GHz.
Be illustrated although signal is split, will understand that those skilled in the art above-mentioned fractionation need not depend on the frequency component of signal with regard to the frequency spectrum of signal.For example, can be configured to the multiband dividing filter network that signal splits into 0-10GHz frequency band and 10-20GHz frequency band split have be in 2 and 3GHz between the signal of frequency component.Because this signal does not have the frequency component that is in the 10-20GHz frequency range, thereby the frequency component of this signal will can not occur in the fractionation signal, but this signal will be split into these frequency bands.
Consult Fig. 8, in 64, carry out amplifying signal is combined into digitized signal can be included in 66 each amplifying signal is digitized into digitized amplifying signal and in 68 with the synthetic digitized signal of digitized amplifying signal digit groups.Can these digitized amplifying signals be made up with identical or different weight.For example, if the amplifying signal of identical amplitude is digitized into identical digitized amplifying signal, then can use identical weight.In addition, if because of imbalance has appearred in the cause of fractionation, amplification, digitizing or the like, then can come the amplifying signal of combined digitalization, to compensate described imbalance with different weights.
As mentioned above, amplifying signal can have frequency range.As a result, when with specific amplifying signal digitizing, can be used for the sample rate of sample rate of other amplifying signals of digitizing with its digitizing to be different from.For example, if the frequency component of an amplifying signal is lower than the frequency component of another amplifying signal, then is used for the former sample rate of digitizing and can be lower than and be used for the digitizing latter's sample rate.As a result, the digital quantizer that is used to have the amplifying signal of lower frequency components can be the less and lower-cost digital quantizer of bandwidth.
Consult Fig. 9, in 64, amplifying signal is combined into digitized signal and can be included in 70 amplifying signal is combined into composite signal, and in 72, this composite signal is digitized into digitized signal.
Consult Figure 10, in 74, can carry out equilibrium the frequency response that influences the amplifying signal that makes up.The fractionation that signal is carried out, amplification, combination or the like may be imperfect.As a result, the frequency response that influences array response may have amplitude or phase distortion.Can compensate this distortion.Be derived from the frequency response of fractionation, amplification and the combination of signal by equilibrium, can obtain more accurate expression about input signal.
The combination amplifying signal can comprise that the subclass with amplifying signal is combined into digitized signal.Can select the subclass of amplifying signal, with a part used as digitized signal.Can select to comprise a amplifying signal to any number of all amplifying signals.By selecting the subclass of amplifying signal, other amplifying signals can be got rid of from combination.As a result, can check the particular frequency range of input signal, simultaneously, avoid digitized signal being exerted one's influence from the undesired signal or the noise of unselected frequency band.
In addition, can carry out above-mentioned selection by machinery or digital device.For example, mechanical switch mechanically disconnects amplifying signal, thereby it is removed from combination.In addition, before making up, digitized amplifying signal can be made as zero, or it be applied among the combination.Can finish selection in artificial or automatic mode to frequency band.For example, user's state that can change mechanical switch is selected the amplifying signal of subclass.In addition, the user can select signal from a menu on the test and sensing device, and then this instrument will be controlled the selection of signal.
A kind ofly can comprise that each is split signal carries out filtering for the method for test and sensing device digitized signal.Each is split signal, can in a certain frequency range, carry out filtering it.At least one frequency range that splits signal is different from the frequency range that other split signal.For example, the frequency range of the filtering of the signal of generation fractionation therein can be complementary with the passband of the amplification that the fractionation signal takes place therein.Yet passband that will wave filter is limited to that passband of the amplification that signal takes place to split therein.For example, when in the frequency range of 0-5GHz, 5-10GHz and 10-15GHz, amplifying the fractionation signal, can be that the wave filter of 0-10GHz carries out filtering to the frequency band of 0-5GHz and 5-10GHz with passband, be that the wave filter of 10-20GHz carries out filtering to the frequency band of 10-15GHz with passband.
Although below specific frequency range is illustrated,, those skilled in the art will understand, owing to reasons such as the bandwidth of input signal and existing parts, also can use other frequency range.For example, more than input signal is described with the frequency range of 0-20GHz, yet, depending on signal source, input signal can have the frequency component that is in the greater or lesser frequency range.As a result, can correspondingly adjust the number of frequency ranges that splits signal.In addition, the frequency range that more than will split the frequency band of signal is described as the span with 5GHz.Yet, can regulate the frequency range that splits signal, to consider existing various parts.For example, if obtain having the amplifier of the frequency range of octave form easily, then the frequency range that splits signal can be arranged to 2-4GHz, 4-8GHz, 8-12GHz or the like.
Although certain embodiments is illustrated,, must understand, the invention is not restricted to these embodiment.Under the prerequisite that does not deviate from the scope of the invention of in following claim, stating, can carry out various changes and modification.
Claims (18)
1. multi-band amplifier that is used for test and sensing device comprises:
Input signal (12) is split into the resolver of from the group of forming by resistive power divider and multiband dividing filter network, choosing (10) of a plurality of fractionation signals (14);
A plurality of amplifiers (16), each amplifier are used for amplifying relevant fractionation signal in an amplifier passband, to produce one or more amplifying signals (20);
The combiner of from the group of forming by resistive power combiner and multiband dividing filter network, choosing (18) with described amplifying signal (20) combination; With
With the digitized digital quantizer of the amplifying signal that is made up (24);
Wherein, the amplifier passband of at least one amplifier (16) is different from the amplifier passband of another amplifier.
2. the multi-band amplifier in the claim 1 also comprises balanced device (26), and equilibrium is from the frequency response of the input that inputs to described balanced device of described resolver.
3. the multi-band amplifier in the claim 1, also comprise a plurality of attenuators (30), each attenuator is connected to a relevant amplifier in described a plurality of amplifier (16), and before the relevant amplifier of relevant fractionation signal (14) input, this relevant fractionation signal is used to decay, and each attenuator has the attenuator passband that equates substantially with the amplifier passband of described relevant amplifier.
4. the multi-band amplifier in the claim 1 also comprises a plurality of switches (34), and each switch is connected to a relevant amplifier in described a plurality of amplifier (16), and is used for controlling selectively the influence of relevant amplifying signal to described digitized signal.
5. the multi-band amplifier in the claim 1, also comprise a plurality of wave filters (38), each wave filter is connected to a relevant amplifier in described a plurality of amplifier (16), and before the relevant amplifier of relevant fractionation signal (14) input, be used to this relevant fractionation signal is carried out filtering, and each wave filter has the filter passbands that equates substantially with the amplifier passband of described relevant amplifier.
6. one kind is the method for test and sensing device digital input signal (12), comprising:
With the resolver of from the group of forming by resistive power divider and multiband dividing filter network, choosing (10) described input signal (12) is split into a plurality of fractionation signals (14);
In relevant amplifier passband, each is split signal (14) zoom into amplifying signal (20); With
Described amplifying signal (20) is combined into digitized signal (28);
Wherein, splitting the relevant amplifier passband of amplifying signal (20) with at least one is different from and the relevant amplifier passband of another fractionation amplifying signal.
7. the method in the claim 6, wherein make up described amplifying signal and also comprise:
Each amplifying signal (20) is digitized into digitized amplifying signal; With
Described digitized amplifying signal digitally is combined into described digitized signal (28).
8. the method in the claim 6, wherein make up described amplifying signal and also comprise:
The combiner of choosing from the group of being made up of resistive power combiner and multiband dividing filter network (18) is combined into composite signal with described amplifying signal (20); With
Described composite signal (22) is digitized into digitized signal (28).
9. the method in the claim 6 also comprises the balanced output signal frequency response that is obtained by fractionation, amplification and the combination of signal.
10. the method in the claim 6 wherein splits described signal and comprise described signal is split into the fractionation signal, and described fractionation signal has essentially identical frequency spectrum.
11. the method in the claim 6 wherein splits described signal and comprises signal is split into the fractionation signal, and at least one splits signal and does not have and with another frequency spectrum that splits signal extensive overlapping frequency spectrum takes place.
12. the method in the claim 6 wherein makes up described amplifying signal and comprises a subclass is combined into described digitized signal, and this subclass by part but not whole described amplifying signal formed.
13. the method in the claim 6 also comprises each described fractionation signal is carried out filtering, each is split signal carry out filtering in a frequency range, and the frequency range of at least one fractionation signal is different from the frequency range that another splits signal.
14. a multi-band amplifier that is used for test and sensing device comprises:
Input signal (12) is split into the resolver of from the group of forming by resistive power divider and multiband dividing filter network, choosing (10) of a plurality of fractionation signals (14);
A plurality of amplifiers (16), each amplifier are used for amplifying relevant fractionation signal (14) in an amplifier passband, to produce one or more amplifying signals;
A plurality of digital quantizers (24), each digital quantizer is with relevant amplifying signal digitizing;
With
Described digitized amplifying signal is combined into the combiner (42) of digitized signal;
Wherein, the amplifier passband of at least one amplifier is different from the amplifier passband of another amplifier.
15. the multi-band amplifier in the claim 14 also comprises balanced device (26), equilibrium
Frequency response from the input that inputs to described balanced device of described resolver (10).
16. the multi-band amplifier in the claim 14, also comprise a plurality of attenuators (30), each attenuator is connected to a relevant amplifier in described a plurality of amplifier (16), and before the relevant amplifier of relevant fractionation signal (14) input, this relevant fractionation signal (14) is used to decay, and, have the attenuator passband that equates substantially with the amplifier passband of described relevant amplifier.
17. the multi-band amplifier in the claim 14, also comprise a plurality of switches (34), each switch is connected to a relevant amplifier in described a plurality of amplifier (16), and is used for controlling selectively the influence of relevant amplifying signal to described digitized signal.
18. the multi-band amplifier in the claim 14, also comprise a plurality of wave filters (38), each wave filter is connected to a relevant amplifier in described a plurality of amplifier (16), and before the relevant amplifier of relevant fractionation signal (14) input, be used to this relevant fractionation signal is carried out filtering, and each wave filter has the filter passbands that equates substantially with the amplifier passband of described relevant amplifier.
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| CN101917373B (en) * | 2010-06-18 | 2013-01-23 | 西安电子科技大学 | Method for realizing high-efficiency amplification based on signal decomposition and amplification device |
| CN101917197B (en) * | 2010-08-19 | 2013-06-12 | 河南科技大学 | Double-channel analog/digital combined variable gain data acquisition device |
| EP3442120B1 (en) * | 2017-08-08 | 2021-02-03 | Rohde & Schwarz GmbH & Co. KG | Amplifier circuit and method |
| CN110336537B (en) * | 2019-06-21 | 2023-04-07 | 西安天和防务技术股份有限公司 | Multi-frequency point control circuit |
| CN113625032A (en) * | 2021-07-01 | 2021-11-09 | 普源精电科技股份有限公司 | Probe measurement system and method |
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2006
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