CN105136290A - Method of realizing overall gain consistency of multichannel photoelectric detection device and device - Google Patents
Method of realizing overall gain consistency of multichannel photoelectric detection device and device Download PDFInfo
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- CN105136290A CN105136290A CN201510681096.7A CN201510681096A CN105136290A CN 105136290 A CN105136290 A CN 105136290A CN 201510681096 A CN201510681096 A CN 201510681096A CN 105136290 A CN105136290 A CN 105136290A
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Abstract
The embodiment of the invention provides a device for realizing overall gain consistency of a multichannel photoelectric detection device and a method, which relates to the technical field of weak light detection. The device comprises the multichannel photoelectric detection device. The output end of each channel of the multichannel photoelectric detection device is connected with an amplifier; the amplifier connected with the output end of the nth channel of the multichannel photoelectric detection device has a gain of G2n, G2n=G/G1n, G1n is the original gain of the nth channel of the multichannel photoelectric detection device, and G is the overall gain of each channel of the multichannel photoelectric detection device. The method comprises steps: gain compensation is carried out on signals outputted by each channel of the multichannel photoelectric detection device to enable signals outputted by each channel to have consistent overall gain. According to the device and the method provided by the embodiment of the invention, overall gain consistency of each channel can be realized, and signals acquired at the output end of the multichannel photoelectric detection device have high consistency.
Description
Technical field
The present invention relates to faint light detection technical field, realize the conforming method of multichannel light electric detection device entire gain and device in particular to one.
Background technology
Photodetector/device comprises multi-anode photomultiplier, multi-channel photon counter tube (MultiPixelPhotoCounter, or multichannel avalanche photodide (AvalanchePhotoDiode MPPC), APD), its effect light signal is changed into corresponding electric signal.Inventor finds under study for action, because the conversion gain of each passage of multichannel light electric explorer/device is different, some can differ the gain of several times, therefore result in after same light signal incides different passages, its corresponding voltage of conversion output or the in different size of current signal, and then cause the signals collecting of rear end to there is larger inconsistency.
Summary of the invention
In view of this, the object of the embodiment of the present invention is to provide one to realize the conforming method of multichannel light electric detection device entire gain and device, to improve the problems referred to above, realizes the entire gain consistance of multichannel light electric detection device.
First aspect, embodiments provide one and realize the conforming device of multichannel light electric detection device entire gain, comprise multichannel light electric detection device, the output terminal of each passage of described multichannel light electric detection device is connected with amplifier, and the gain of the amplifier of the output terminal connection of the n-th passage of described multichannel light electric detection device is G
2n,g
2n=G ÷ G
1n, wherein, G
1nfor the original gain of the n-th passage of described multichannel light electric detection device, G is the entire gain of each passage of described multichannel light electric detection device, and n is natural number.
In conjunction with first aspect, embodiments provide the first possible embodiment of first aspect, wherein, the amplifier of the output terminal connection of each passage is the amplifier of gain Independent adjustable.
By connecting the amplifier of gain Independent adjustable at the output terminal of each passage, the signal for exporting each passage carries out the gain compensation of respective degrees, and implementation is simple.
In conjunction with first of first aspect the possible embodiment, embodiments provide the embodiment that the second of first aspect is possible, wherein, described amplifier comprises signal amplification circuit and signal attenuation circuit, described signal amplification circuit comprises triode, described signal attenuation circuit comprises damping resistance, and the gain of described amplifier is the product of the gain of described signal amplification circuit and the gain of described signal attenuation circuit.
Amplifier directly can adopt operational amplifier, and implementation is simple, but the shortcoming existed adopts operational amplifier to carry out gain compensation at least to need two operational amplifiers, and the volume of device will be caused so comparatively large, and power consumption is larger.As another kind of embodiment, be signal amplification circuit and signal attenuation circuit two parts by Amplifier Design, described signal amplification circuit comprises triode, described signal attenuation circuit comprises damping resistance, triode carries out signal amplification to the signal that each passage exports, decayed to the signal after amplification by damping resistance, the entire gain of the signal exported to make each passage is consistent again.Adopt triode and damping resistance with the use of mode gain compensation is carried out to signal, reduce the physical dimension of whole device greatly, reduce the power consumption of whole device and the heat energy of generation, significant for electronic product.
In conjunction with the embodiment that the second of first aspect is possible, embodiments provide the third possible embodiment of first aspect, wherein, described triode is microwave triode.
Second aspect, the embodiment of the present invention additionally provides one and realizes the conforming method of multichannel light electric detection device entire gain, comprises the following steps:
Carry out gain compensation to the signal that each passage of described multichannel light electric detection device exports respectively, the entire gain of the signal that each passage is exported is consistent.
In conjunction with second aspect, embodiments provide the first possible embodiment of second aspect, the amplifier of the output terminal connection of each passage of described multichannel light electric detection device is the amplifier of gain Independent adjustable; The amplifier of the output terminal connection of described each passage by described multichannel light electric detection device, respectively gain compensation is carried out to the signal that each passage of described multichannel light electric detection device exports, the entire gain of the signal that each passage is exported is consistent, comprising:
The amplifier of the gain Independent adjustable connected by the output terminal of each passage of described multichannel light electric detection device, the signal exported each passage of described multichannel light electric detection device respectively carries out a signal and amplifies, and the entire gain of the signal that each passage is exported is consistent.
In conjunction with second aspect, embodiments provide the embodiment that the second of second aspect is possible, the amplifier that the output terminal of each passage of described multichannel light electric detection device connects comprises signal amplification circuit and signal attenuation circuit, described signal amplification circuit comprises triode, described signal attenuation circuit comprises damping resistance, and the gain of described amplifier is the product of the gain of described signal amplification circuit and the gain of described signal attenuation circuit;
The amplifier of the output terminal connection of described each passage by described multichannel light electric detection device, respectively gain compensation is carried out to the signal that each passage of described multichannel light electric detection device exports, the entire gain of the signal that each passage is exported is consistent, comprising:
The triode of the described signal amplification circuit of the amplifier connected by the output terminal of each passage of described multichannel light electric detection device, carries out signal amplification to the signal that each passage of described multichannel light electric detection device exports respectively;
The damping resistance of the described signal attenuation circuit of the amplifier connected by the output terminal of each passage of described multichannel light electric detection device, signal after the amplification exported each passage respectively again carries out signal attenuation, and the entire gain of the signal that each passage is exported is consistent.
In conjunction with second aspect, embodiments provide the third possible embodiment of second aspect, the amplifier that the output terminal of each passage of described multichannel light electric detection device connects comprises signal amplification circuit and signal attenuation circuit, described signal amplification circuit comprises triode, described signal attenuation circuit comprises damping resistance, and the gain of described amplifier is the product of the gain of described signal amplification circuit and the gain of described signal attenuation circuit;
The amplifier of the output terminal connection of described each passage by described multichannel light electric detection device, respectively gain compensation is carried out to the signal that each passage of described multichannel light electric detection device exports, the entire gain of the signal that each passage is exported is consistent, comprising:
The damping resistance of the described signal attenuation circuit of the amplifier connected by the output terminal of each passage of described multichannel light electric detection device, carries out signal attenuation to the signal that each passage of described multichannel light electric detection device exports respectively;
The triode of the described signal amplification circuit of the amplifier connected by the output terminal of each passage of described multichannel light electric detection device, signal after the decay exported each passage respectively again carries out signal amplification, and the entire gain of the signal that each passage is exported is consistent.
What the embodiment of the present invention provided realizes the conforming device and method of multichannel light electric detection device entire gain, amplifier is connected with by the output terminal of each passage at multichannel light electric detection device, amplifier amplifies the signal that the signal that this passage exports carries out in various degree, the entire gain that can realize each passage is consistent, makes the signal conformance that gathers at the output terminal of multichannel light electric detection device very high.
Further, what the embodiment of the present invention provided realizes the conforming device of multichannel light electric detection device entire gain, be made up of signal amplification circuit and signal attenuation circuit by amplifier is arranged as, described signal amplification circuit comprises triode, described signal attenuation circuit comprises damping resistance, utilize triode and damping resistance amplify signal respectively and decay, the entire gain of the signal exported to make each passage is consistent.Adopt triode and damping resistance with the use of mode gain compensation is carried out to signal, make the whole small volume realizing the conforming device of multichannel light electric detection device entire gain, and power consumption is lower.
For making above-mentioned purpose of the present invention, feature and advantage become apparent, preferred embodiment cited below particularly, and coordinate appended accompanying drawing, be described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present invention, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 shows a kind of composition structural representation realizing the conforming device of multichannel light electric detection device entire gain that the embodiment of the present invention provides;
The another kind that Fig. 2 shows the embodiment of the present invention to be provided realizes the composition structural representation of the conforming device of multichannel light electric detection device entire gain;
Fig. 3 show the embodiment of the present invention and provide another realize the composition structural representation of the conforming device of multichannel light electric detection device entire gain;
The one that Fig. 4 shows the embodiment of the present invention to be provided realizes the conforming method flow diagram of multichannel light electric detection device entire gain.
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.The assembly of the embodiment of the present invention describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiments of the invention provided in the accompanying drawings and the claimed scope of the present invention of not intended to be limiting, but selected embodiment of the present invention is only represented.Based on embodiments of the invention, the every other embodiment that those skilled in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
Inventor finds under study for action, because the conversion gain of each passage of multichannel light electric explorer/device is different, some can differ the gain of several times, therefore result in after same light signal incides different passages, its corresponding voltage of conversion output or the in different size of current signal, and then cause the signals collecting of rear end to there is larger inconsistency, be unfavorable for the detection of signal.
Based on this, inventor contemplate the mode adopting software compensation, use computing machine to revise the signal collected exactly, but be through and attempt finding, do effect so very limited, after all signal inherently inadequate natural endowment, how computing machine compensates again, and its signal to noise ratio (S/N ratio) can not improve.
Based on this, inventor is through constantly research, what propose that the embodiment of the present invention provides realizes the conforming method of multichannel light electric detection device entire gain and device, and the amplification being undertaken in various degree by the signal exported by each passage, is consistent to make the entire gain of each passage.
What the embodiment of the present invention provided realizes the conforming device of multichannel light electric detection device entire gain, comprise multichannel light electric detection device, the output terminal of each passage of described multichannel light electric detection device is connected with amplifier, and the gain of the amplifier of the output terminal connection of the n-th passage of described multichannel light electric detection device is G
2n, G
2n=G ÷ G
1n, wherein, G
1nfor the original gain of the n-th passage of described multichannel light electric detection device, G is the entire gain of each passage of described multichannel light electric detection device, and n is natural number.
Such as, the original gain of passage 1 is G
11, the light signal being namely incident to the passage 1 of multichannel light electric detection device becomes gain into G after changing
11electric signal, the gain of the amplifier that the output terminal of passage 1 connects is G
21, then gain is G
11electric signal entire gain after the amplification of amplifier be G (G=G
21× G
11) electric signal.The original gain of passage 2 is G
12, the light signal being namely incident to the passage 2 of multichannel light electric detection device becomes gain into G after changing
12electric signal, the gain of the amplifier that the output terminal of passage 2 connects is G
22, then gain is G
12electric signal entire gain after the amplification of amplifier be G (G=G
22× G
12) electric signal.By the amplification that the signal exported by each passage carries out in various degree, the entire gain achieving the signal that each passage exports is consistent.
Concrete, see Fig. 1, as a kind of embodiment, what the embodiment of the present invention provided realizes the conforming device of multichannel light electric detection device entire gain, can comprise multichannel light electric detection device, the output terminal of each passage of described multichannel light electric detection device is connected with amplifier, wherein, the amplifier of the output terminal connection of each passage is the amplifier of gain Independent adjustable, and the amplifier that namely output terminal of each passage connects is respectively independently amplifier.The gain of the amplifier of the output terminal connection of the n-th passage of described multichannel light electric detection device is G
2n.
The amplifier of amplifier or gain Independent adjustable can be the equipment that can realize arbitrarily signal amplification, and such as, as concrete a kind of embodiment, the amplifier of gain Independent adjustable can adopt operational amplifier to realize.The signal realized by the way each passage exports amplifies, carry out gain compensation in various degree, the entire gain that can realize each passage is consistent, and implementation is simple, only needs the operational amplifier configuring corresponding gain at the output terminal of each passage.
But be through testing inspection in kind, inventor finds under study for action further, needs to adopt at least two operational amplifiers, cause the volume of device larger when adopting operational amplifier to realize, and the operational amplifier that passage needs more is more, make the structure of whole device also larger; In addition, each operational amplifier will work, consume electric energy, and producing heat, the heat energy that whole device is produced is comparatively large, can not meet user demand preferably, and operational amplifier uses more power consumptions are larger, the heat energy produced is more, and for electronic product, this is totally unfavorable, has a strong impact on serviceable life and the applied environment of product.
In order to solve size and heat dissipation problem, inventor, through constantly research, in many ways attempts, finally proposes another kind preferably embodiment.
See Fig. 2, the one that the embodiment of the present invention provides realizes the conforming device of multichannel light electric detection device entire gain, multichannel light electric detection device can be comprised, the output terminal of each passage of described multichannel light electric detection device is connected with the amplifier of gain Independent adjustable, wherein, the amplifier of the gain Independent adjustable of the output terminal connection of each passage comprises signal amplification circuit and signal attenuation circuit, described signal amplification circuit comprises triode, described signal attenuation circuit comprises damping resistance, the gain of described amplifier is the product of the gain of described signal amplification circuit and the gain of described signal attenuation circuit.Preferably, the preferred microwave triode of triode, can realize the amplification of high-speed high bandwidth, and noise is low.First by microwave triode, signal is amplified, then by damping resistance, the signal after amplification is decayed, finally make the entire gain of the signal exported consistent.
Be signal amplification circuit and signal attenuation circuit two parts by Amplifier Design, described signal amplification circuit comprises triode, described signal attenuation circuit comprises damping resistance, triode carries out signal amplification to the signal that each passage exports, damping resistance is decayed to signal, and the entire gain of the signal exported to make each passage is consistent.Adopt triode and damping resistance with the use of mode gain compensation is carried out to signal, reduce the physical dimension of whole device greatly, reduce the power consumption of whole device and the heat energy of generation, particularly for the Electro-Optical Sensor Set with tens up to a hundred passages, the physical dimension of whole device reduce and the effect of lower power consumption more obvious, significant for electronic product.What the embodiment of the present invention provided realizes the conforming device of multichannel light electric detection device entire gain, not only achieve the consistance of multichannel light electric detection device entire gain, and structure is less, low in energy consumption, meet modern to the small size of electronic product, the requirement of low-power consumption.
When the amplifier that recycling comprises triode and damping resistance carries out gain compensation to the signal that each passage exports, first can carry out signal amplification by triode to signal, by damping resistance, signal attenuation is carried out to the signal after amplification again, or also first can carry out signal attenuation by damping resistance to signal, by triode, signal amplification is carried out to the signal after decay again, finally make the entire gain of the output signal of each passage consistent.
Due to the amplification performance of triode and temperature correlation larger, in order to ensure the signal amplification performance stability of triode, preferably, what the embodiment of the present invention provided realize the conforming device of multichannel light electric detection device entire gain can also comprise a thermostat, utilizes this thermostat that the triode in each signal amplification circuit is in isoperibol.
In the transistor epoch, triode is almost eliminated, not use by technician.And the gain consistance that triode amplifies is more far short of what is expected than operational amplifier, more no one expects using triode to carry out signal amplification.Inventor through constantly attempting research, in embodiments of the present invention, by triode and damping resistance with the use of, the entire gain not only achieving the signal that each passage exports is consistent, and the volume of whole device is little, consumes energy low, solve heat dissipation problem, achieve technological breakthrough.
See Fig. 3, embodiments provide another and realize the conforming device of multichannel light electric detection device entire gain, multichannel light electric detection device can be comprised, the output terminal of each passage of described multichannel light electric detection device is connected with amplifier, amplifier comprises signal amplification circuit and signal attenuation circuit, signal amplification circuit comprises triode, described signal attenuation circuit comprises damping resistance, the amplifier that the output terminal of adjacent two passages connects shares a described signal amplification circuit, the gain of the amplifier of the output terminal connection of each passage is the product of the gain of described signal amplification circuit and the gain of described signal attenuation circuit.
Be signal amplification circuit and signal attenuation circuit two parts by Amplifier Design, adjacent two passages amplify (signal of two passages hocket signal amplify) by the signal sharing signal amplification circuit and carry out same degree to the signal exported separately, again by respective signal attenuation circuit respectively to the decay that the signal after amplifying separately carries out in various degree, the entire gain of the signal exported to make each passage is consistent.The amplifier that the output terminal of adjacent two passages connects passes through to share signal amplification circuit, the physical dimension of whole device is reduced further, reduce further the power consumption of whole device and the heat energy of generation.
In the scheme that the present embodiment provides, adjacent two passages share a signal amplification circuit, be convenient to the layout setting of signal amplification circuit, easy understand, a signal amplification circuit can be shared by any two passages, also can share a signal amplification circuit by multiple passage, the embodiment of the present invention does not limit this.
In structure shown in Fig. 3, signal amplification circuit is first connected with the output terminal of each passage, and the signal first exported individual passage carries out the amplification of same degree, then is connected with each signal attenuation circuit, to the decay that the signal after amplification carries out in various degree.As another kind of embodiment, also can each signal attenuation circuit first be connected with the output terminal of each passage, the signal first exported individual passage carries out decay in various degree, then is connected with each signal amplification circuit, the signal after decay is carried out to the amplification of same degree.
Preferably, the impedance matching of the damping resistance in the signal attenuation circuit of the amplifier of the output terminal connection of each passage, the reflection that can realize like this exporting on transmission line at signal reduces.
The embodiment of the present invention additionally provides one and realizes the conforming method of multichannel light electric detection device entire gain, comprises step:
Carry out gain compensation to the signal that each passage of described multichannel light electric detection device exports respectively, the entire gain of the signal that each passage is exported is consistent.
Such as, G
1nfor the original gain of the n-th passage of described multichannel light electric detection device, G is the entire gain of each passage of described multichannel light electric detection device, and the gain that the signal demand that the n-th passage of so described multichannel light electric detection device exports carries out gain compensation is G
2n, G
2n=G ÷ G
1n, n is natural number.
The mode that the signal realizing exporting each passage of described multichannel light electric detection device respectively carries out gain compensation can have multiple, such as, as a kind of embodiment:
The signal exported each passage of described multichannel light electric detection device respectively adopts the amplifier of gain Independent adjustable to carry out a signal amplification, and the entire gain of the signal that each passage is exported is consistent.
Concrete, can by connecting the amplifier realized by least two operational amplifiers of a gain Independent adjustable at the output terminal of each passage, the amplifier that the output terminal of each passage connects carries out a signal amplification to the signal that each passage exports.
As shown in Figure 4, as another kind of embodiment:
S101: to each channel input signal.
S102: the signal amplification circuit of the composition amplifier utilizing the output terminal of each passage to connect carries out signal amplification to the signal that respective passage exports respectively.
When realizing, the output terminal of each passage connects the amplifier of gain Independent adjustable respectively, amplifier comprises signal amplification circuit and signal attenuation circuit, and signal amplification circuit comprises triode, preferably adopts microwave triode to carry out signal amplification to the signal that respective passage exports.
S103: the signal after the amplification that the signal attenuation circuit of the composition amplifier utilizing the output terminal of each passage to connect again respectively exports respective passage carries out signal attenuation, and the entire gain of the signal exported to make each passage is consistent.
When realizing, signal attenuation circuit comprises damping resistance, carries out signal attenuation by damping resistance to the signal after amplification.
S104: each passage exports the consistent signal of entire gain.
Similar, as another kind of embodiment:
The signal that each passage of signal attenuation circuit to described multichannel light electric detection device of the composition amplifier utilizing the output terminal of each passage to connect respectively exports carries out signal attenuation;
Signal after the decay that the signal amplification circuit of the composition amplifier that the output terminal recycling each passage connects exports each passage respectively carries out signal amplification, and the entire gain of the signal after the amplification that each passage is exported is consistent.
The method that the embodiment of the present invention provides, the gain compensation being undertaken in various degree by the signal exported each passage of described multichannel light electric detection device, the entire gain that can realize the signal that each passage exports is consistent.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (10)
1. one kind realizes the conforming device of multichannel light electric detection device entire gain, it is characterized in that, comprise multichannel light electric detection device, the output terminal of each passage of described multichannel light electric detection device is connected with amplifier, and the gain of the amplifier of the output terminal connection of the n-th passage of described multichannel light electric detection device is G
2n, G
2n=G ÷ G
1n, wherein, G
1nfor the original gain of the n-th passage of described multichannel light electric detection device, G is the entire gain of each passage of described multichannel light electric detection device, and n is natural number.
2. device according to claim 1, is characterized in that, the amplifier of the output terminal connection of each passage is the amplifier of gain Independent adjustable.
3. device according to claim 2, it is characterized in that, described amplifier comprises signal amplification circuit and signal attenuation circuit, described signal amplification circuit comprises triode, described signal attenuation circuit comprises damping resistance, and the gain of described amplifier is the product of the gain of described signal amplification circuit and the gain of described signal attenuation circuit.
4. device according to claim 3, is characterized in that, described triode is microwave triode.
5. device according to claim 4, is characterized in that, the impedance matching of the damping resistance of the amplifier of the output terminal connection of any two passages.
6. according to the arbitrary described device of claim 1-5, it is characterized in that, described multichannel light electric detection device is multi-anode photomultiplier or multi-channel photon counter tube or multichannel avalanche photodide or multiple independent photomultiplier.
7. application rights requires that the device described in 1 realizes the conforming method of multichannel light electric detection device entire gain, it is characterized in that, comprises the following steps:
By the amplifier that the output terminal of each passage of described multichannel light electric detection device connects, carry out gain compensation to the signal that each passage of described multichannel light electric detection device exports respectively, the entire gain of the signal that each passage is exported is consistent.
8. method according to claim 7, is characterized in that, the amplifier of the output terminal connection of each passage of described multichannel light electric detection device is the amplifier of gain Independent adjustable;
The amplifier of the output terminal connection of described each passage by described multichannel light electric detection device, respectively gain compensation is carried out to the signal that each passage of described multichannel light electric detection device exports, the entire gain of the signal that each passage is exported is consistent, comprising:
The amplifier of the gain Independent adjustable connected by the output terminal of each passage of described multichannel light electric detection device, the signal exported each passage of described multichannel light electric detection device respectively carries out a signal and amplifies, and the entire gain of the signal that each passage is exported is consistent.
9. method according to claim 7, it is characterized in that, described amplifier comprises signal amplification circuit and signal attenuation circuit, described signal amplification circuit comprises triode, described signal attenuation circuit comprises damping resistance, and the gain of described amplifier is the product of the gain of described signal amplification circuit and the gain of described signal attenuation circuit;
The amplifier of the output terminal connection of described each passage by described multichannel light electric detection device, respectively gain compensation is carried out to the signal that each passage of described multichannel light electric detection device exports, the entire gain of the signal that each passage is exported is consistent, comprising:
The triode of the described signal amplification circuit of the amplifier connected by the output terminal of each passage of described multichannel light electric detection device, carries out signal amplification to the signal that each passage of described multichannel light electric detection device exports respectively;
The damping resistance of the described signal attenuation circuit of the amplifier connected by the output terminal of each passage of described multichannel light electric detection device, signal after the amplification exported each passage respectively again carries out signal attenuation, and the entire gain of the signal that each passage is exported is consistent.
10. method according to claim 7, it is characterized in that, the amplifier that the output terminal of each passage of described multichannel light electric detection device connects comprises signal amplification circuit and signal attenuation circuit, described signal amplification circuit comprises triode, described signal attenuation circuit comprises damping resistance, and the gain of described amplifier is the product of the gain of described signal amplification circuit and the gain of described signal attenuation circuit;
The amplifier of the output terminal connection of described each passage by described multichannel light electric detection device, respectively gain compensation is carried out to the signal that each passage of described multichannel light electric detection device exports, the entire gain of the signal that each passage is exported is consistent, comprising:
The damping resistance of the described signal attenuation circuit of the amplifier connected by the output terminal of each passage of described multichannel light electric detection device, carries out signal attenuation to the signal that each passage of described multichannel light electric detection device exports respectively;
The triode of the described signal amplification circuit that the amplifier connected by the output terminal of each passage of described multichannel light electric detection device is shared, signal after the decay exported each passage respectively again carries out signal amplification, and the entire gain of the signal that each passage is exported is consistent.
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Cited By (1)
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Application publication date: 20151209 |