CN104868856A - Non-linear feedback circuit and integrated amplifying circuit - Google Patents
Non-linear feedback circuit and integrated amplifying circuit Download PDFInfo
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- CN104868856A CN104868856A CN201510284241.8A CN201510284241A CN104868856A CN 104868856 A CN104868856 A CN 104868856A CN 201510284241 A CN201510284241 A CN 201510284241A CN 104868856 A CN104868856 A CN 104868856A
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Abstract
The invention discloses a non-linear feedback circuit and an integrated amplifying circuit, and belongs to the technical field of electronics. The non-linear feedback circuit comprises at least one over-critical detector and a non-linear dynamic companding processor, wherein the over-critical detector is used for converting a received signal into a linear difference original signal, and transmitting the linear different original signal to the non-linear dynamic companding processor; and the non-linear fd dynamic companding processor is used for compressing or amplifying the linear difference original signal in order that an output signal is up to standard and output effectively. Through adoption of the non-linear feedback circuit and the integrated amplifying circuit, the aim of realizing distortion control is fulfilled through batch production without large-scale complex component screening and difficult matching work.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of non-linear feedback circuit and integrated amplifier.
Background technology
In prior art, the distortion of amplifying for analog signal in most of circuit controls, and is the output size of consistency by simple profound and negative feedbck and components and parts itself and operational characteristic decision distortion completely.On the other hand, due to the restriction of prior art, if continue to obtain higher index on the basis that existing distortion controls, can only by mating a large amount of screenings of components and parts or obtained by the mode of the operational characteristic of chip manufacturing, the complexity increasing manpower and materials greatly drops into by such mode, and the consistency of element is not easy to be well controlled, therefore by batch production realize distortion control become and can not realize, can only on the device product of some high values customized application.
Summary of the invention
Main purpose of the present invention is to propose a kind of non-linear feedback circuit and integrated amplifier, is intended to solve the distortion that in the circuit of prior art, signal amplifies and controls cost higher problem.
For achieving the above object, a kind of non-linear feedback circuit provided by the invention, is characterized in that, described non-linear feedback circuit comprises at least one and crosses critical detector, Nonlinear Dynamic companding processor:
The critical detector of described mistake is used for converting the signal of reception to linear differences primary signal, and described linear differences primary signal is transferred to described Nonlinear Dynamic companding processor;
Described Nonlinear Dynamic companding processor is used for described linear differences primary signal to carry out compressing or amplifying thus make the signal of output reach standard effectively to export.
A kind of non-linear feedback circuit as above is provided, the critical detector of described mistake comprises the bridge arm circuit be made up of the first resistance, the second resistance, the 3rd resistance and the 4th resistance: the electric connection point of described first resistance and the second resistance and the electric connection point of described 3rd resistance and the 4th resistance are respectively used to Received signal strength and output signal, and the electric connection point of described first resistance and the 3rd resistance and the electric connection point of described 4th resistance and described second resistance are for connecting a reference source; Or
The critical detector of described mistake comprises the bridge arm circuit be made up of the first resistance, the second resistance, the first diode and the second diode, wherein: the electric connection point of described first resistance and the second resistance and the electric connection point of described first diode and the second diode are respectively used to Received signal strength and output signal, the electric connection point of described first resistance and the first diode and the electric connection point of described second resistance and described second diode are for connecting described a reference source.
There is provided a kind of non-linear feedback circuit as above, described Nonlinear Dynamic companding processor comprises gain controller, point amount controller, rectifier and buffer:
Described point of amount controller is used for the described linear differences primary signal received to pro rata distribute to be two signals, one of them Signal transmissions gives described gain controller as input signal, and the gain control signal of another signal successively as described gain controller after described rectifier and buffer process inputs described gain controller;
Wherein, the signal that described rectifier is used for receiving carries out amplifications averaged, and the signal that described buffer is used for receiving cushions, described gain controller for the amplitude of the signal of reception is adjusted to default companding ratio threshold values after export.
A kind of non-linear feedback circuit as above is provided, between the critical detector of described mistake and described Nonlinear Dynamic companding processor, is also provided with reverser.
A kind of non-linear feedback circuit as above is provided, the signal input part that described non-linear feedback circuit also comprises N linear adjustment potentiometer described in N linear adjustment potentiometer is connected with the signal output part of described Nonlinear Dynamic companding processor, and wherein N is more than or equal to 1.
There is provided a kind of non-linear feedback circuit as above, described Nonlinear Dynamic companding processor is digital threshold values companding multiplier-divider;
The critical detector of described mistake is that numeral crosses critical detector, also for carrying out analog-to-digital conversion to by described linear differences primary signal.
For achieving the above object, the present invention also provides a kind of integrated amplifier, it is characterized in that, described integrated amplifier comprises non-linear feedback circuit as above, amplifying circuit and summing circuit:
Described summing circuit, for the primary signal of Received signal strength generating means and the feedback signal of non-linear feedback circuit feedback, and sends to described amplifying circuit after described primary signal and described feedback signal being sued for peace; Described amplifying circuit, sends to signal receiving device after the signal for being sent by described summing circuit amplifies;
Described non-linear feedback circuit, for detecting the output signal of described amplifying circuit and sending described feedback signal to described summing circuit.
There is provided a kind of integrated amplifier as above, described summing circuit, also for sending signal to described non-linear feedback circuit while sending signal to described amplifying circuit;
Described non-linear feedback circuit, the signal also for sending according to output signal and the described summing circuit of described amplifying circuit sends described feedback signal to described summing circuit.
For achieving the above object, the present invention also provides a kind of integrated amplifier, and described integrated amplifier comprises at least one non-linear feedback circuit as above and at least one amplifying circuit:
Each amplifying circuit non-linear feedback circuit all in parallel.
For achieving the above object, the present invention also provides a kind of integrated amplifier, comprises non-linear feedback circuit as above, amplifying circuit and digital signal summing circuit:
Described digital signal summing circuit, for the digital feedback signal of the primary signal of receiving digital signals generating means and described non-linear feedback circuit feedback, and convert analog signal to after described primary signal and described digital feedback signal being sued for peace and send to described amplifying circuit;
Described amplifying circuit, sends to signal receiving device after the signal for being sent by described digital signal summing circuit amplifies;
Described non-linear feedback circuit, for detecting the output signal of described amplifying circuit and feeding back described digital feedback signal to described summing circuit.
For achieving the above object, the present invention also provides a kind of integrated amplifier, comprises non-linear feedback circuit as above, amplifying circuit, summing circuit and digital to analog converter:
Described non-linear feedback circuit, for detecting the output signal of described amplifying circuit and feedback signal being sent to described digital to analog converter;
Described summing circuit, for the primary signal of Received signal strength generating means and the output signal of described digital to analog converter, and sends to described amplifying circuit after described primary signal and described output signal being sued for peace;
Described amplifying circuit, sends to signal receiving device after the signal for being sent by described summing circuit amplifies.
The non-linear feedback circuit that the present invention proposes and integrated amplifier, owing to have employed critical detector and Nonlinear Dynamic companding processor, can the realize target distortion factor adjustment continuous dynamic conditioning, and to the consistency coupling of element itself and the less demanding of technique, without the need to carrying out loaded down with trivial details large-scale Component screening and difficult pairing work, achieve the object being realized distortion control by the production of batch, the closed loop simultaneously solving general profound and negative feedbck circuit amplifies bandwidth problem, also be greatly reduce amount of negative feedback and make circuit more stable while solution distortion adjustment, can easily broadening amplifier have dedicated bandwidth.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of the nonlinearity of amplifying circuit;
Fig. 2 is the feedback function topological diagram of the non-linear feedback circuit of first embodiment of the invention;
Fig. 3 is the circuit block diagram of the critical detector of mistake in the execution mode of in non-linear feedback circuit shown in Fig. 1;
Fig. 4 is the circuit block diagram of the critical detector of mistake in another execution mode in non-linear feedback circuit shown in Fig. 1;
Fig. 5 is the module frame chart of the Nonlinear Dynamic companding processor in non-linear feedback circuit shown in Fig. 1;
Fig. 6 is the module frame chart of another execution mode of the non-linear feedback circuit of first embodiment of the invention;
The circuit block diagram of a kind of integrated amplifier that Fig. 7 provides for second embodiment of the invention;
The circuit block diagram of a kind of integrated amplifier that Fig. 8 provides for third embodiment of the invention;
The circuit block diagram of a kind of integrated amplifier that Fig. 9 provides for fourth embodiment of the invention;
The circuit block diagram of a kind of integrated amplifier that Figure 10 fifth embodiment of the invention provides;
The circuit block diagram of a kind of integrated amplifier that Figure 11 sixth embodiment of the invention provides;
The circuit block diagram of a kind of integrated amplifier that Figure 12 seventh embodiment of the invention provides;
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
For a better understanding of the present invention, need to be described amplifier nonlinearity degree.The nonlinearity of broad sense refers to the deviation relative to exporting a relative so-called ideal line (chain-dotted line as in Fig. 1) in input relation coordinate.And the dotted line in Fig. 1 is the signal curve of the nonlinear properties before amplifier correction, its nonlinearity is larger; Solid line is revised signal curve, and it has the good linearity.This inclined extent N.L.=(reality exports-try to achieve output)/specified full width exports.
The better straight line standardization of nonlinearity need measure peak value positive and negative deviation, and adjusts (realizing by regulating gain and imbalance) the slope of element transfer function, to make the maximum positive and negative deviation of measurement equal.The method can obtain optimum precision, but needs user to measure whole output signal range due to the method, to determine maximum positive and negative deviation, is therefore difficult to realize.What prior art adopted usually is simple end points standardization, namely only requires that user carries out lacking of proper care and gain calibration on extreme point, and the omnidistance element of non-signal is measured and dynamic conditioning in real time.And adopt non-linear feedback circuit of the present invention and integrated amplifier, can change nonlinearity that existing technical staff generally believes not by dynamic pre-adjustment to be reduced in the viewpoint of the application of amplifier region.
The embodiment of the present invention one provides a kind of non-linear feedback circuit.Refer to Fig. 2, it comprises at least one and crosses critical detector 21 and Nonlinear Dynamic companding processor 22.
This crosses critical detector 21 for converting the signal S100 of reception to linear differences primary signal (i.e. signal S101), and this signal S101 is transferred to this Nonlinear Dynamic companding processor 22;
This Nonlinear Dynamic companding processor 22 effectively exports for being carried out compressing or amplifying by signal S101 thus making the signal S102 of output reach standard.
Please continue to refer to Fig. 3, cross the bridge arm circuit that critical detector 21 comprises the first resistance R1, the second resistance R2, the 3rd resistance R3 and the 4th resistance R4 formation: the electric connection point of this first resistance R1 and the second resistance R2 and the electric connection point of the 3rd resistance R3 and the 4th resistance R4 are respectively used to Received signal strength and output signal, and the electric connection point of the electric connection point of this first resistance R1 and the 3rd resistance R3 and the 4th resistance R4 and this second resistance R2 is for connecting a reference source 211.
In a preferred scheme, 3rd resistance 2 and the 4th resistance also can replace to diode as required, now the electrical connection of each element as shown in Figure 4, the electric connection point of this first resistance R1 and the second resistance R2 and the electric connection point of this first diode D1 and the second diode D2 are respectively used to Received signal strength and output signal, and the electric connection point of the electric connection point of this first resistance R1 and the first diode D1 and this second resistance R2 and this second diode D2 is for connecting this reference source 211.Two diodes in this preferred scheme can select tunnel diode.
In actual applications, when this non-linear feedback circuit is applied in integrated amplifier, cross critical detector and receive reference current from the signal correction of main element (as amplifier) and signal S100, through the preset value of adjustment a reference source, the Static output of signal S100 can be made to be zero output, after the bridge arm circuit be made up of resistance and diode (wherein diode also can replace to resistance as required) when signal S100 feed-in afterwards, output component signal S101, just obtains linear differences primary signal.In practical application, this difference threshold values crossing critical detector 21 is determined by presetting early stage.
In a preferred scheme, non-linear feedback circuit can also arrange the critical detector of mistake of the parallel connection of multiple different stage, thus makes amplification circuit obtain the better linearity.
Refer to Fig. 5, Nonlinear Dynamic companding processor 22 comprises gain controller 221, point amount controller 222, rectifier 223 and buffer 224.Amount controller 222 is divided to be two signals for being pro rata distributed by the linear differences primary signal S101 of reception, one of them Signal transmissions gives this gain controller 221 as input signal, another signal inputs this gain controller 221 as the gain control signal of this gain controller successively after this rectifier and buffer process, wherein, the signal of reception is carried out amplification averaged by this rectifier 223; This buffer 224 is for cushioning the signal received; The amplitude of the signal of reception is adjusted to the threshold values of default companding ratio by this gain controller, thus makes the signal S102 of output reach standard effectively to export.
In actual applications, after receiving the linear differences primary signal S101 exported from excessively critical detector 21 detection, first signal S101 is two signals by point amount controller 222 pro-rata: one inputs as gain controller signal, another is through amplifying averaged, extremely preset the threshold values of companding ratio after buffering as the amplitude of the gain control signal adjustment signal S101 of control unit, now can obtain enough large feedback compensation signal voltage at the signal input part of amplifying circuit.
This voltage the adjustment amount of feed-in the best can be obtained a minimum linear value (distortion factor is adjusted to minimum) distortion factor can along with FD feed be in ascending process in the process of adjustment by adjustable potentiometer, the distorted result that A exports can be one by height to minimum and then become large process, and in practical application, only get the minimum value adjusted to.Generally this kind of adjustment mode needs repeatedly to carry out in systems in which, because the nonlinear state of the change active device of whole system along with temperature in running has difference, so the adjustment carrying out the last distortion factor after system is finally stable can set.
In a preferred scheme, non-linear feedback circuit can also comprise the linear adjustment potentiometer 23 of N.The signal input part of the linear adjustment potentiometer 23 of this N is connected with the signal output part of this Nonlinear Dynamic companding processor 22, and wherein N is more than or equal to 1, as shown in Figure 6.In the present embodiment, the linear adjustment potentiometer of N can adopt machinery adjustment potentiometer, adjusts the linear adjustment potentiometer 23 of this N by machinery, makes to export distortion factor continuously adjustabe whole to minimum.
The non-linear feedback circuit of the present embodiment, comprised critical detector and Nonlinear Dynamic companding processor, when it receives the output signal of integrated amplifier, cross critical detector the original input signal that this output signal and integrated amplifier receive to be carried out proportional arrangement and carries out difference signal detecting and exporting, the difference signal be less than in preset range (i.e. linear differences primary signal) is exported to Nonlinear Dynamic companding processor process, by Nonlinear Dynamic companding processor, the compression of this linear differences primary signal row or the standard that is amplified to effectively are exported the Signal averaging received with integrated amplifier, the low gain or the high-gain moment that obtain relative nonlinear state carry out gain compensation to opposite linear district, signal after now compensating will closer to linear condition, the detection that repetition said process finally reached critical detector exports as " zero ", thus the continuous dynamic conditioning of realize target distortion factor adjustment, and to the consistency coupling of element itself and the less demanding of technique, without the need to carrying out loaded down with trivial details large-scale Component screening and difficult pairing work, achieve the object being realized distortion control by the production of batch.
Based on the non-linear feedback circuit of above-described embodiment, second embodiment of the invention proposes a kind of integrated amplifier.It should be noted that, the integrated amplifier of the present embodiment is current feedback amplifying circuit.In the present embodiment, amplifier circuit can comprise multiple amplifier, for convenience of description the operation principle of the present embodiment integrated amplifier, the amplifying circuit 730 of the present embodiment can be reduced to a main amplifier as shown in Figure 7.Refer to Fig. 7, this integrated amplifier comprises non-linear feedback circuit 710, summing circuit 720, amplifying circuit 730.
This summing circuit 720, for the primary signal of Received signal strength generating means and the feedback signal of non-linear feedback circuit feedback, and sends to this amplifying circuit 730 after this primary signal and this feedback signal being sued for peace;
This amplifying circuit 730, sends to signal receiving device after the signal for being sent by this summing circuit 720 amplifies;
This non-linear feedback circuit 710, for detecting the output signal of this amplifying circuit 730 and sending out 720 to this summing circuit and give this feedback signal.
In the present embodiment, this summing circuit 720, also for sending signal to this non-linear feedback circuit 710 while sending signal to this amplifying circuit 730;
This non-linear feedback circuit 710, also for sending this feedback signal according to the output signal of this amplifying circuit 730 and the signal of this summing circuit 710 to this summing circuit.
Concrete, the different stage that non-linear feedback circuit 710 is provided with N number of parallel connection crosses critical detector 711, Nonlinear Dynamic companding processor 712 and the linear adjustment potentiometer 713 of N, and the pre-set threshold value of the critical detector of each mistake is not identical yet.First signal input part of the critical detector 711 of this N number of mistake, be electrically connected with the signal output part of amplifying circuit 730, secondary signal input is electrically connected with the secondary signal output of summing circuit, and the signal output part of the critical detector 711 of this N number of mistake is electrically connected with the signal input part of Nonlinear Dynamic companding processor 712; The signal output part of Nonlinear Dynamic companding processor 712 is electrically connected with the signal input part of the linear adjustment potentiometer 713 of N.The signal output part of the linear adjustment potentiometer 713 of N is the signal output part of this non-linear feedback circuit 710, is connected with the secondary signal input of summing circuit 720.
The primary signal generating means of the first signal input part Received signal strength generating means of this summing circuit 720, secondary signal input is electrically connected with the signal output part of this non-linear feedback circuit 710.
Signal receiving device is further, when amplifying circuit is gain amplifier, and restrictedly can also set up the linearity that linear feedback circuit 740 adjusts amplifying circuit when requiring in integrated amplifier.The signal input part of this linear feedback circuit is electrically connected with the secondary signal output of amplifying circuit, and signal output part is electrically connected with the secondary signal input of summing circuit.
Because the feedback function crossing critical detector also provide for the stable circuit-mode of high-gain, gain scale can be arranged equally, but the sensitivity of adjustment can be changed while arranging, thus gain A amplifier is restricted require time can by increasing the nonlinearity of linear feedback circuit 740 adjustment amplifying circuit 730 further.
This integrated amplifier operationally, when after input primary signal (as effective linear signal) to summing circuit 720, this signal is assigned with the negative input end being sent to main amplifier and the second input crossing critical detector 711, the signal sending into main amplifier was fed back into critical detector 711 after amplifying to carry out proportional arrangement with primary signal and carries out difference signal detecting and exporting, difference threshold values is determined by presetting early stage, the difference signal be less than in preset range is exported to Nonlinear Dynamic companding processor 712 process, the signal of difference is carried out compressing or be amplified to standard and effectively exports and summing circuit Signal averaging by Nonlinear Dynamic companding processor 712, the low gain of the relative nonlinear state of main amplifier or high-gain moment are carried out gain compensation to opposite linear district, signal after now compensating will closer to linear condition, signal after compensation will feed back again has been critical detector 711, the detection that repetition said process finally reached critical detector 711 exports as " zero ".It should be noted that, as long as electronic component all can introduce linear distortion in practical application, but the distortion of detection part and the linearity are better than the linearity of active amplifier unit far away, thus the amplifier (low distortion realization) of the Linear Amplifer characteristic be greatly improved at the signal output part of main amplifier.And the present embodiment adopts different progression parallel connection, the critical detector of mistake 711 with different pre-set threshold value can obtain the better linearity.
The integrated amplifier of the present embodiment, owing to have employed non-linear feedback circuit, can the realize target distortion factor adjustment continuous dynamic conditioning, and to the consistency coupling of element itself and the less demanding of technique, without the need to carrying out loaded down with trivial details large-scale Component screening and difficult pairing work, achieve the object being realized distortion control by the production of batch.
Based on the non-linear feedback circuit of above-described embodiment, third embodiment of the invention proposes a kind of integrated amplifier.The integrated amplifier of the present embodiment is voltage feedback type amplifying circuit.It should be noted that, in the present embodiment, amplifier circuit can comprise multiple amplifier, the operation principle of the present embodiment integrated amplifier for convenience of description, the amplifying circuit 830 of the present embodiment can be referred to Fig. 8 by the main amplifier be reduced to as shown in Figure 8, this integrated amplifier comprises non-linear feedback circuit 810, summing circuit 820, amplifying circuit 830.
This summing circuit 820, for the primary signal of Received signal strength generating means and the feedback signal of non-linear feedback circuit feedback, and sends to this amplifying circuit 830 after this primary signal and this feedback signal being sued for peace;
This amplifying circuit 830, sends to signal receiving device after the signal for being sent by this summing circuit 820 amplifies;
This non-linear feedback circuit 810, for detecting the output signal of this amplifying circuit 830 and sending out 820 to this summing circuit and give this feedback signal.
In the present embodiment, this summing circuit 820, also for sending signal to this non-linear feedback circuit 810 while sending signal to this amplifying circuit 830;
This non-linear feedback circuit 810, also for sending this feedback signal according to the output signal of this amplifying circuit 830 and the signal of this summing circuit 810 to this summing circuit.
Concrete, the critical detector of mistake 811 that non-linear feedback circuit 810 is provided with N number of different progression parallel connection, that have different pre-set threshold value, Nonlinear Dynamic companding processor 812 and the linear adjustment potentiometer 813 of N, the pre-set threshold value of the critical detector of each mistake is not identical yet.First signal input part of the critical detector 811 of this N number of mistake, be electrically connected with the signal output part of amplifying circuit 830, secondary signal input is electrically connected with the secondary signal output of summing circuit, the signal output part of the critical detector 811 of this N number of mistake is equipped with reverser 814, and is electrically connected with the signal input part of Nonlinear Dynamic companding processor 812 by reverser 814; The signal output part of Nonlinear Dynamic companding processor 812 is electrically connected with the signal input part of the linear adjustment potentiometer 813 of N.The signal output part of the linear adjustment potentiometer 813 of N is the signal output part of this non-linear feedback circuit 810, is connected with the secondary signal input of summing circuit 820.
The primary signal of the first signal input part Received signal strength generating means of this summing circuit 820, secondary signal input is electrically connected with the signal output part of this non-linear feedback circuit 810.
Further, when amplifying circuit is gain amplifier, and restrictedly can also set up the linearity that linear feedback circuit 840 adjusts amplifying circuit when requiring in integrated amplifier.The signal input part of this linear feedback circuit is electrically connected with the secondary signal output of amplifying circuit, and signal output part is electrically connected with the secondary signal input of summing circuit.
Because excessively critical feedback function also provide for the stable circuit-mode of high-gain, gain scale can be arranged equally, but the sensitivity of adjustment can be changed while arranging, thus gain A amplifier is restricted require time can by increasing the nonlinearity of linear feedback circuit 840 adjustment amplifying circuit 830 further.
This integrated amplifier operationally, when after input primary signal (as effective linear signal) to summing circuit 820, this signal is assigned with the negative input end being sent to main amplifier and the second input crossing critical detector 811, the signal sending into main amplifier was fed back into critical detector 811 after amplifying to carry out proportional arrangement with primary signal and carries out difference signal detecting and exporting, difference threshold values is determined by presetting early stage, the difference signal be less than in preset range is exported to Nonlinear Dynamic companding processor 812 process, the signal of difference is carried out compressing or be amplified to standard and effectively exports and summing circuit Signal averaging by Nonlinear Dynamic companding processor 812, the low gain of the relative nonlinear state of main amplifier or high-gain moment are carried out gain compensation to opposite linear district, signal after now compensating will closer to linear condition, signal after compensation will feed back again has been critical detector 811, the detection that repetition said process finally reached critical detector 811 exports as " zero ".It should be noted that, as long as electronic component all can introduce linear distortion in practical application, but the distortion of detection part and the linearity are better than the linearity of active amplifier unit far away, thus the amplifier (low distortion realization) of the Linear Amplifer characteristic be greatly improved at the signal output part of main amplifier.And the present embodiment adopt different progression parallel connection, there is different pre-set threshold value cross critical detector 811 and can obtain the better linearity.
The integrated amplifier of the present embodiment, owing to have employed non-linear feedback circuit, can the realize target distortion factor adjustment continuous dynamic conditioning, and to the consistency coupling of element itself and the less demanding of technique, without the need to carrying out loaded down with trivial details large-scale Component screening and difficult pairing work, achieve the object being realized distortion control by the production of batch.
Fourth embodiment of the invention proposes a kind of integrated amplifier, and the integrated amplifier of the present embodiment is traditional high-power audio amplifier and the combination of non-linear feedback circuit.Refer to Fig. 9, this integrated amplifier comprises the first amplifying circuit 911, second amplifying circuit 912, the 3rd amplifying circuit 913 and three non-linear feedback circuit (921,922,923).
First amplifying circuit 911 and the 3rd amplifier 913 include a reverser, and the second amplifying circuit 912 comprises an amplifier.First amplifying circuit 911, second amplifying circuit 912 and the 3rd amplifying circuit 913 are sequentially connected in series.Wherein the signal input part of the first amplifying circuit 911 is electrically connected with signal generator AC, and the signal output part of the 3rd amplifying circuit 913 is connected with loudspeaker equivalent load circuit 94.
First amplifying circuit 911 is in parallel with non-linear feedback circuit 921, and the signal input part of this non-linear feedback circuit 921 is provided with an a divider resistance R91 and shunt resistance R92.
Second amplifying circuit 912 is in parallel with non-linear feedback circuit 922, and the signal input part of this non-linear feedback circuit 922 is also provided with an a divider resistance R91 and shunt resistance R92, and wherein this bleeder circuit R91 and reverser G1 is chained together.
First amplifying circuit 911 is in parallel with non-linear feedback circuit 921, and the signal input part of this non-linear feedback circuit 921 is provided with an a divider resistance R91 and shunt resistance R92.
It should be noted that, in actual applications, can select as required retain or remove traditional linear feedback circuit 93.
When the integrated amplifier of the present embodiment is applied to high-power audio amplifier field, the frequency response of complete machine is by very big broadening, and the distortion factor is down to minimum.At HIFI (High-Fidelity, high-fidelity) field is without the need to strict device screening technique, high fidelity <0.01% can be reached very easily by the threshold values adjusting critical detector, especially when a large amount of Parallel opertation driving tube of employing rear class, scheduling and planning work will reduce greatly, make batch production become possibility.In practical application, for saving cost also directly can replace conventional feedback by one-level non-linear feedback circuit, every grade of amplification feedback model bandwidth relatively can be narrower so relatively certainly.
Fifth embodiment of the invention proposes a kind of integrated amplifier, and the present embodiment integrated amplifier can be applicable to general small signal simulation amplification driving circuit, as the output buffer stage circuit of various consumer playing audio/video.
Refer to Figure 10, this integrated amplifier comprises an amplifier 101 and a non-linear feedback circuit.
Amplifier 101 is in parallel with non-linear feedback circuit 102, and the signal input part of this non-linear feedback circuit 102 is provided with an a divider resistance R101 and shunt resistance R102, and wherein this bleeder circuit R101 and reverser G2 is chained together.
The integrated amplifier of the present embodiment, owing to have employed non-linear feedback circuit, can the realize target distortion factor adjustment continuous dynamic conditioning, and to the consistency coupling of element itself and the less demanding of technique, without the need to carrying out loaded down with trivial details large-scale Component screening and difficult pairing work, achieve the object being realized distortion control by the production of batch.
A kind of integrated amplifier that sixth embodiment of the invention provides.Because analog quantity is convertible into digital signal, so based on same principle, the present embodiment utilizes numeral to cross critical numerical value multiplication and division correcting mode can reach distortion adjustment control model equally.Refer to Figure 11, this integrated amplifier comprises: summing circuit 111, amplifying circuit 112, non-linear feedback circuit 113 and digital to analog converter 114.
This non-linear feedback circuit 113 comprises numeral and crosses critical detector 1131, digital threshold values companding multiplier-divider 1132.
Numeral crosses critical detector 1131, for receiving the signal of the signal output part of amplifying circuit 112 and converting the signal of reception to linear differences primary signal, and this linear differences primary signal is converted to digital data transmission to digital threshold values companding multiplier-divider 1132.Can directly increase a digital to analog converter at the signal output part of the critical detector of the mistake of Fig. 3 or Fig. 4 in practical application and realize the function that this numeral crosses critical detector 1131.
Numeral threshold values companding multiplier-divider 1132, can be undertaken compressing or amplifying by the digital signal of reception thus make the signal of output reach standard and effectively export.
The signal input part of digital to analog converter 114 is electrically connected with the signal output part of digital threshold values companding multiplier-divider 1132, and the signal output part of digital to analog converter 114 is electrically connected with the signal input part of summing circuit 111.
Summing circuit 111, the primary signal of Received signal strength generating means and the signal (i.e. feedback signal) of digital to analog converter, and send to amplifying circuit after this primary signal and this feedback signal being sued for peace.112。
The integrated amplifier of the present embodiment, can control to take into account distortion adjustment at digital volume simultaneously, very practical in the circuit having digital signal processor.
Seventh embodiment of the invention provides a kind of integrated amplifier.The present embodiment is described with the example that is applied as of integrated amplifier in signal generator field.Refer to Figure 12, the present embodiment integrated amplifier comprises: digital signal summing circuit 121, amplifying circuit 122, non-linear feedback circuit 123 and analog to digital converter 124.
Non-linear feedback circuit 123 comprises: numeral crosses critical detector 1231, digital threshold values companding multiplier-divider 1232.
Numeral crosses critical detector 1231, for receiving the signal of the signal output part of amplifying circuit 122 and converting the signal of reception to linear differences primary signal, and this linear differences primary signal is converted to digital data transmission to digital threshold values companding multiplier-divider 1232.In practical application, can directly increase a digital to analog converter at the signal output part of the critical detector of the mistake of Fig. 3 or Fig. 4 and realize the function that this numeral crosses critical detector 1231.
Numeral threshold values companding multiplier-divider 1232, can be undertaken compressing or amplifying by the digital signal of reception thus make the signal of output reach standard and effectively export.
The raw digital signal of digital signal summing circuit 121 receiving digital signals generating means and the digital feedback signal of digital threshold values companding multiplier-divider 1232, and convert analog signal to after this raw digital signal and this digital feedback signal being sued for peace and send to this amplifying circuit 122.
Amplifying circuit 122 is Simulation scale-up multiplier (-icator), and its signal output part is electrically connected with analog to digital converter 124.
In practical application, the output of amplifying circuit 122 also can direct outputting analog signal.
In the present embodiment, digital audio source is used to produce digital audio, control amplitude size by Simulation scale-up gain after digital audio being carried out digital-to-analogue conversion, the feedback processing correction distortion factor, can realize the signal generating source of high quality standards with very little cost simultaneously.
It should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or device and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or device.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the device comprising this key element and also there is other identical element.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (11)
1. a non-linear feedback circuit, is characterized in that, described non-linear feedback circuit comprises at least one and crosses critical detector and Nonlinear Dynamic companding processor:
The critical detector of described mistake is used for converting the signal of reception to linear differences primary signal, and described linear differences primary signal is transferred to described Nonlinear Dynamic companding processor;
Described Nonlinear Dynamic companding processor is used for described linear differences primary signal to carry out compressing or amplifying thus make the signal of output reach standard effectively to export.
2. non-linear feedback circuit according to claim 1, it is characterized in that, the critical detector of described mistake comprises bridge arm circuit, described bridge arm circuit comprises the first resistance, the second resistance, the 3rd resistance and the 4th resistance: the electric connection point of described first resistance and the second resistance and the electric connection point of described 3rd resistance and the 4th resistance are respectively used to Received signal strength and output signal, and the electric connection point of described first resistance and the 3rd resistance and the electric connection point of described 4th resistance and described second resistance are for connecting a reference source; Or
Described bridge arm circuit comprises the first resistance, the second resistance, the first diode and the second diode, wherein: the electric connection point of described first resistance and the second resistance and the electric connection point of described first diode and the second diode are respectively used to Received signal strength and output signal, the electric connection point of described first resistance and the first diode and the electric connection point of described second resistance and described second diode are for connecting described a reference source.
3. non-linear feedback circuit according to claim 1, is characterized in that, described Nonlinear Dynamic companding processor comprises gain controller, point amount controller, rectifier and buffer:
Described point of amount controller is used for the described linear differences primary signal received to pro rata distribute to be two signals, one of them Signal transmissions gives described gain controller as input signal, and the gain control signal of another signal successively as described gain controller after described rectifier and buffer process inputs described gain controller;
Wherein, the signal that described rectifier is used for receiving carries out amplifications averaged, and the signal that described buffer is used for receiving cushions, described gain controller for the amplitude of the signal of reception is adjusted to default companding ratio threshold values after export.
4. the non-linear feedback circuit according to any one of claims 1 to 3, is characterized in that, is also provided with reverser between the critical detector of described mistake and described Nonlinear Dynamic companding processor.
5. non-linear feedback circuit according to claim 4, it is characterized in that, the signal input part that described non-linear feedback circuit also comprises N linear adjustment potentiometer described in N linear adjustment potentiometer is connected with the signal output part of described Nonlinear Dynamic companding processor, and wherein N is more than or equal to 1.
6. non-linear feedback circuit according to claim 1, is characterized in that, described Nonlinear Dynamic companding processor is digital threshold values companding multiplier-divider;
The critical detector of described mistake is that numeral crosses critical detector, also for carrying out analog-to-digital conversion to by described linear differences primary signal.
7. an integrated amplifier, is characterized in that, described integrated amplifier comprises non-linear feedback circuit, amplifying circuit and summing circuit as described in any one of claim 1 to 5:
Described summing circuit, for the primary signal of Received signal strength generating means and the feedback signal of non-linear feedback circuit feedback, and sends to described amplifying circuit after described primary signal and described feedback signal being sued for peace;
Described amplifying circuit, sends to signal receiving device after the signal for being sent by described summing circuit amplifies;
Described non-linear feedback circuit, for detecting the output signal of described amplifying circuit and sending described feedback signal to described summing circuit.
8. integrated amplifier according to claim 7, is characterized in that,
Described summing circuit, also for sending signal to described non-linear feedback circuit while sending signal to described amplifying circuit;
Described non-linear feedback circuit, the signal also for sending according to output signal and the described summing circuit of described amplifying circuit sends described feedback signal to described summing circuit.
9. an integrated amplifier, is characterized in that, described integrated amplifier comprises at least one non-linear feedback circuit as described in any one of claim 1 to 5 and at least one amplifying circuit:
Each amplifying circuit non-linear feedback circuit all in parallel.
10. an integrated amplifier, is characterized in that, comprises non-linear feedback circuit as claimed in claim 6, amplifying circuit and digital signal summing circuit:
Described digital signal summing circuit, for the digital feedback signal of the primary signal of receiving digital signals generating means and described non-linear feedback circuit feedback, and convert analog signal to after described primary signal and described digital feedback signal being sued for peace and send to described amplifying circuit;
Described amplifying circuit, sends to signal receiving device after the signal for being sent by described digital signal summing circuit amplifies;
Described non-linear feedback circuit, for detecting the output signal of described amplifying circuit and feeding back described digital feedback signal to described summing circuit.
11. 1 kinds of integrated amplifiers, is characterized in that, comprise non-linear feedback circuit as claimed in claim 6, amplifying circuit, summing circuit and digital to analog converter:
Described non-linear feedback circuit, for detecting the output signal of described amplifying circuit and feedback signal being sent to described digital to analog converter;
Described summing circuit, for the primary signal of Received signal strength generating means and the output signal of described digital to analog converter, and sends to described amplifying circuit after described primary signal and described output signal being sued for peace;
Described amplifying circuit, sends to signal receiving device after the signal for being sent by described summing circuit amplifies.
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| CN201510284241.8A CN104868856B (en) | 2015-05-28 | 2015-05-28 | A kind of non-linear feedback circuit and integrated amplifier |
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| CN201510284241.8A CN104868856B (en) | 2015-05-28 | 2015-05-28 | A kind of non-linear feedback circuit and integrated amplifier |
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| CN104868856B (en) | 2018-03-23 |
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