CN207475533U - A kind of signal source circuit - Google Patents
A kind of signal source circuit Download PDFInfo
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- CN207475533U CN207475533U CN201721701557.3U CN201721701557U CN207475533U CN 207475533 U CN207475533 U CN 207475533U CN 201721701557 U CN201721701557 U CN 201721701557U CN 207475533 U CN207475533 U CN 207475533U
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Abstract
The utility model is related to electronic measuring instrument field, more particularly to a kind of signal source circuit；Including control circuit, the control circuit is used to control the work of radio frequency combiner circuit, including CPU, regulator circuit and interface circuit；Radio frequency combiner circuit is further included, the radio frequency combiner circuit includes digital baseband or DDS circuit, mixting circuit, radio frequency filter circuit and level control circuit；The utility model provides signal source circuit and realizes scheduled signal processing flow by particular electrical circuit connection relation so that circuit work is more stablized.
Description
Technical field
The utility model is related to electronic measuring instrument field, more particularly to a kind of signal source circuit.
Background technology
In radiofrequency signal field, electronic gauge is essential test equipment, and the signal source in electronic gauge
The even more core devices of electronic gauge are mainly responsible for generation with specific frequency, the radio signal of amplitude, signal source electricity
The whether reliable and stable overall performance for directly determining electronic measuring instrument in road.
Utility model content
The purpose of this utility model is that the technology of reliable and stable signal source circuit is needed in face of electronic measuring instrument to be needed
It asks, a kind of signal source circuit for electronic gauge is provided.
In order to realize above-mentioned purpose of utility model, the utility model provides following technical scheme：
A kind of signal source circuit, including control circuit, the control circuit is used to control the work of radio frequency combiner circuit,
Including CPU, regulator circuit and interface circuit；
Radio frequency combiner circuit, the radio frequency combiner circuit include digital baseband or DDS circuit, mixting circuit, rf filtering
Circuit and level control circuit；
The mixting circuit includes intermediate-freuqncy signal source, and the intermediate-freuqncy signal source is used to generate 21.4MHz intermediate-freuqncy signals；It is logical
The first low-pass filter is crossed to connect with an input terminal of the first frequency mixer；Another input terminal of first frequency mixer receives
149.6MHz signals, the 149.6MHz signals pass sequentially through the first amplification filter with 21.4MHz signals after the mixing of the first frequency mixer
171MHz signals are exported after wave circuit, the second filtering and amplifying circuit to RF switch；The RF switch receives at least two-way
171MHz signals, meanwhile, the output terminal of the RF switch is connect with the first attenuator, and first attenuator is low by third
Bandpass filter exports signal；The attenuator is voltage adjustable attenuator.
Further, the regulator circuit includes external power interface circuit；
The first port of the external power interface circuit, second port access -5V external power supplys, pass through the first filtered electrical
After the processing of road, to objective circuit output -5V power supplys；
Third port, the 4th port access+5.5V external power supplys, after being handled by the second filter circuit, respectively by the
One regulator circuit, the second regulator circuit, third regulator circuit, the 4th regulator circuit are to objective circuit output+5.5V power supplys；
Fifth port, the 6th port are simultaneously grounded after connecing；
7th port, the 8th port access+5V external power supplys, after being handled by third filter circuit, respectively by the 5th
Regulator circuit, the 6th regulator circuit are to objective circuit output+3.3V power supplys；+ 5V the external power supplys also pass sequentially through third filter
Output+2.5V power supplys after wave circuit and the processing of the 7th regulator circuit；
9th port, the tenth port are simultaneously grounded after connecing；
Tenth Single port, the tenth Two-port netwerk access+3.3V external power supplys handle backward target electricity by the 4th filter circuit
Road output+3.3V power supplys.Further, first filter circuit includes the first filter once connected and the first inductance；
The both ends of first inductance pass through the first capacitance, the second capacity earth respectively；First inductance and the second electricity
The one end for holding connection also passes through third capacity earth simultaneously.
Further, second filter circuit includes the second inductance, one end and the external electricity of+5.5V of second inductance
Source connects, and other end is+5V power output ends；Meanwhile the both ends of second inductance pass through the 4th capacitance and the 5th respectively
Capacity earth；One end of second inductance and the 5th capacitance connection also passes through the 6th capacitance, the 7th capacity earth respectively；
First regulator circuit includes the first voltage-stablizer；The input terminal of first voltage-stablizer is the same as the second filter circuit
Output terminal connect, the input terminal of first voltage-stablizer also by the 8th capacity earth, meanwhile, the output of first voltage-stablizer
End passes through the 9th capacitance, the tenth capacity earth respectively；
Second regulator circuit includes the second voltage-stablizer, and the input terminal of second voltage-stablizer is the same as the second filter circuit
Output terminal connect, the input terminal of second voltage-stablizer also by the 11st capacity earth, meanwhile, second voltage-stablizer it is defeated
Outlet passes through the 12nd capacitance, the 13rd capacity earth respectively；
The third regulator circuit includes third voltage-stablizer, and the input terminal of the third voltage-stablizer is the same as the second filter circuit
Output terminal connect, the input terminal of the third voltage-stablizer also by the 14th capacity earth, meanwhile, the third voltage-stablizer it is defeated
Outlet passes through the 15th capacitance, the 16th capacity earth respectively；
4th regulator circuit includes the 4th voltage-stablizer, and the input terminal of the 4th voltage-stablizer is the same as the second filter circuit
Output terminal connect, the input terminal of the 4th voltage-stablizer also by the 17th capacity earth, meanwhile, the 4th voltage-stablizer it is defeated
Outlet passes through the 18th capacitance, the 19th capacity earth respectively.
Further, first voltage-stablizer, the second voltage-stablizer, third voltage-stablizer, the 4th voltage-stablizer are LT1963AES8.
Further, the third filter circuit includes third inductance；The input terminal of the third inductance and the external electricity of+5V
Source connects, while the input terminal also passes through the 20th capacity earth；The output terminal of the third inductance is+5V power supplys, simultaneously should
Output terminal also passes through the 21st capacitance, the 22nd capacity earth respectively；
5th regulator circuit includes the 5th voltage-stablizer, input terminal and the third filter circuit of the 5th voltage-stablizer
Output terminal connects, and the input terminal of the 5th voltage-stablizer also passes through the 23rd capacitance, the 24th capacity earth respectively；Together
When, the output terminal of the 5th voltage-stablizer also by and the 25th capacitance, the 26th capacity earth that connect；
6th regulator circuit includes the 6th voltage-stablizer, input terminal and the third filter circuit of the 6th voltage-stablizer
Output terminal connects, and the input terminal of the 6th voltage-stablizer also passes through the 27th capacitance, the 28th capacity earth respectively；Together
When, the output terminal of the 6th voltage-stablizer also by and the 29th capacitance, the 30th capacity earth that connect；
7th regulator circuit includes the 7th voltage-stablizer, input terminal and the third filter circuit of the 7th voltage-stablizer
Output terminal connects, and the input terminal of the 7th voltage-stablizer also passes through the 31st capacitance, the 32nd capacity earth respectively；Together
When, the output terminal of the 7th voltage-stablizer also by and the 33rd capacitance, the 34th capacity earth that connect.
Further, the 4th filter circuit includes the 4th inductance being sequentially connected in series and second filter；
The input terminal of 4th inductance is connect with+3.3 V external power supplys, meanwhile, the input terminal of the 4th inductance is also
Pass through the 33rd capacity earth；
The output terminal of 4th inductance is connect respectively by the 34th capacitance, the 35th capacitance, the 36th capacitance
Ground.
Further, first filtering and amplifying circuit include sequentially connected 5th filter circuit, the first amplifier and
First low-pass filter.
Further, the 5th filter circuit is formed for three resistance of π type structures.
Further, second filtering and amplifying circuit includes sequentially connected second amplifier and the second low-pass filtering
Device.
Compared with prior art, the beneficial effects of the utility model：The utility model provides a kind of for electronic gauge
The signal source circuit of signal source realizes scheduled signal processing flow so that the utility model by particular electrical circuit connection relation
The signal source circuit work of offer is more stablized, so as to reach the radiofrequency signal in the target zone for making signal source output qualified
Purpose.
Description of the drawings：
Fig. 1 is the utility model principle block diagram.
Fig. 2 is the functional block diagram of regulator circuit in the utility model.
Fig. 3 is external power interface circuit circuit diagram in the utility model.
Fig. 4 a are the circuit connection diagram of the first filter circuit in the utility model.
Fig. 4 b are the circuit connection diagram of the second filter circuit in the utility model.
Fig. 5 a are the circuit connection diagram of the first regulator circuit and the second regulator circuit in the utility model.
Fig. 5 b are the circuit connection diagram of third regulator circuit and the 4th regulator circuit in the utility model.
Fig. 6 is the circuit connection diagram of third filter circuit in the utility model.
Fig. 7 is the circuit connection diagram of the 5th regulator circuit, the 6th regulator circuit, the 7th regulator circuit in the utility model.
Fig. 8 is the circuit connection diagram of the 4th regulator circuit in the utility model.
Fig. 9 is the functional block diagram of mixting circuit in the utility model.
Figure 10 is that intermediate-freuqncy signal source, the first low-pass filter connect circuit diagram with the first frequency mixer in the utility model.
Figure 11 a are the first filtering and amplifying circuit circuit diagram in the utility model.
Figure 11 b are the second filtering and amplifying circuit circuit diagram in the utility model.
Figure 12 is radio-frequency switch circuit figure in the utility model.
Figure 13 is attenuator circuit figure in the utility model.
Figure 14 is Post Mixer schematic block circuit diagram in embodiment.
Figure 15 is that the first frequency mixer, the 6th filter circuit, band pass filter circuit connect in Post Mixer circuit in embodiment
Map interlinking.
Figure 16 is the second low-pass filter, amplifier, the 7th filter circuit connection figure in Post Mixer circuit in embodiment.
Figure 17 is third low-pass filter, digital step attenuator circuit connection diagram in Post Mixer circuit in embodiment.
Figure 18 is the functional block diagram of channel filtering circuit in radio frequency filter circuit in embodiment.
Figure 19 is the second low-pass filter, first digital step attenuator and the 8th filtered electrical in channel filtering circuit
The circuit connection diagram on road.
Figure 20 is third low-pass filter, second digital step attenuator and the 9th filtered electrical in channel filtering circuit
The circuit connection diagram on road.
Figure 21 is the functional block diagram of filtering gain circuit in the utility model radio frequency filter circuit.
Figure 22 is the 11st filter circuit in the utility model, the first amplifier, the 12nd filter circuit, the 13rd filtering
The circuit connection diagram of circuit.
Figure 23 is third frequency mixer, the 14th filter circuit, the second amplifier, the 16th filtered electrical in the utility model
Road, the circuit connection diagram of the 4th frequency mixer.
Figure 24 is the circuit connection diagram of the 15th filter circuit in the utility model.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail the utility model.But this should not be understood
Range for the above-mentioned theme of the utility model is only limitted to following embodiment, all technologies realized based on the utility model content
Belong to the scope of the utility model.
Embodiment 1：As shown in Figures 1 to 8, the present embodiment provides a kind of signal source circuit, including external power interface electricity
Road, the fifth port of external power interface circuit, the 6th port, the 9th port, the tenth port ground connection；
The first port of the external power interface circuit, second port access -5V external power supplys, pass through the first filtered electrical
After road 1 is handled, to objective circuit output -5V power supplys；First filter circuit 1 includes the first filter F26 once connected
And the 5th inductance L60；The both ends of first inductance are grounded respectively by the first capacitance C239, the second capacitance C240；5th electricity
One end that sense L60 is connect with the second capacitance C240 is also grounded simultaneously by third capacitance C243.
Third port, the 4th port access+5.5V external power supplys, after being handled by the second filter circuit 2, respectively by the
One regulator circuit 51, the second regulator circuit 52, third regulator circuit 53, the 4th regulator circuit 54 are to objective circuit output+5.5V
Power supply；Specifically, the second filter circuit 2 includes the second inductance L61, one end and the+5.5V external power supplys of second inductance L61 connect
It connects, other end is+5V power output ends；Meanwhile the both ends of the second inductance L61 pass through the 4th capacitance C245 and respectively
Five capacitance C243 are grounded；One end that the second inductance L61 is connect with the 5th capacitance C243 also respectively by the 6th capacitance C250,
7th capacitance C247 is grounded；First regulator circuit 51 includes the first voltage-stablizer N25；The input terminal of the first voltage-stablizer N25 is same
The output terminal connection of second filter circuit 2, the input terminal of the first voltage-stablizer N25 are also grounded by the 8th capacitance C254, together
When, the output terminal of the first voltage-stablizer N25 is grounded respectively by the 9th capacitance C154, the tenth capacitance C155；Second voltage stabilizing electricity
The input terminal that road 52 includes the second voltage-stablizer N26, the second voltage-stablizer N26 is connected with the output terminal of the second filter circuit 2, institute
The input terminal for stating the second voltage-stablizer N26 is also grounded by the 11st capacitance C253, meanwhile, the output of the second voltage-stablizer N26
End is grounded respectively by the 12nd capacitance C257, the 13rd capacitance C169；Third regulator circuit 53 includes third voltage-stablizer N28,
The input terminal of the third voltage-stablizer N28 is connected with the output terminal of the second filter circuit, the input terminal of the third voltage-stablizer N28
Also it is grounded by the 14th capacitance C251, meanwhile, the output terminal of the third voltage-stablizer N28 passes through the 15th capacitance respectively
C171, the 16th capacitance C183 are grounded；4th regulator circuit 54 includes the 4th voltage-stablizer N18, and the 4th voltage-stablizer N18's is defeated
The output terminal for entering end with the second filter circuit 2 connects, and the input terminal of the 4th voltage-stablizer N18 also passes through the 17th capacitance C218
Ground connection, meanwhile, the output terminal of the 4th voltage-stablizer N18 is grounded respectively by the 18th capacitance C216, the 19th capacitance C217.
7th port, the 8th port access+5V external power supplys, after being handled by third filter circuit 3, respectively by the 5th
Regulator circuit 55, the 6th regulator circuit 56 are to objective circuit output+3.3V power supplys；+ 5V the external power supplys also pass sequentially through
Output+2.5V power supplys after three filter circuits 3 and the processing of the 7th regulator circuit 57；Specifically, in the present embodiment, third filter circuit
3 include third inductance L63；The input terminal of the third inductance L63 is connect, while the input terminal also passes through with+5V external power supplys
20th capacitance C261 is grounded；The output terminal of the third inductance L63 is+5V power supplys, while the output terminal is also respectively by the
21 capacitance C267, the 22nd capacitance C172 are grounded；5th regulator circuit 55 include the 5th voltage-stablizer N23, the described 5th
The input terminal of voltage-stablizer N23 is connect with the output terminal of third filter circuit 3, and the input terminal of the 5th voltage-stablizer N23 is also distinguished
It is grounded by the 23rd capacitance C298, the 24th capacitance C147；Meanwhile the output terminal of the 5th voltage-stablizer N23 is also logical
The 25th capacitance C272, the 26th capacitance the C265 ground connection crossed and connect；6th regulator circuit 56 includes the 6th voltage stabilizing
Device N14, the input terminal of the 6th voltage-stablizer N14 are connect with the output terminal of third filter circuit 3, the 6th voltage-stablizer N14
Input terminal also respectively pass through the 27th capacitance C184, the 28th capacitance C188 ground connection；Meanwhile the 6th voltage-stablizer
The output terminal of N14 also by and the 29th capacitance C189, the 30th capacitance C208 that connect be grounded；7th regulator circuit 57
Including the 7th voltage-stablizer N12, the input terminal of the 7th voltage-stablizer N12 is connect with the output terminal of third filter circuit 3, and described
The input of seven voltage-stablizer N12 is grounded respectively by the 31st capacitance C111；Meanwhile the output terminal of the 7th voltage-stablizer N12
Also it is grounded by the 32nd capacitance C112.
Tenth Single port, the tenth Two-port netwerk access+3.3V external power supplys, backward target is handled by the 4th filter circuit 4
Circuit output+3.3V power supplys.4th filter circuit 4 includes the 4th inductance L62 being sequentially connected in series and second filter F30；
The input terminal of the 4th inductance L62 is connect with+3.3 V external power supplys, meanwhile, the input terminal of the 4th inductance L62 is also logical
Cross the 33rd capacitance C244 ground connection；The output terminal of the 4th inductance L62 passes through the 34th capacitance C241, the 30th respectively
Five capacitance C246, the 36th capacitance C249 are grounded.
As shown in Fig. 9 to Figure 13, the mixting circuit in the present embodiment includes, for generating in 21.4MHz intermediate-freuqncy signals
Frequency source signal 11；Intermediate-freuqncy signal source 11 is connect by the first low-pass filter 12 with an input terminal of the first frequency mixer 13.
Another input terminal of first frequency mixer 13 receives 149.6MHz signals, which believes with 21.4MHz
Number through the first frequency mixer 13 mixing after pass sequentially through the first filtering and amplifying circuit 14, the second filtering and amplifying circuit 15 after export
171MHz signals are to RF switch 16；In the present embodiment, the first filtering and amplifying circuit 14 includes sequentially connected first filtered electrical
Road, the first amplifier and the first low-pass filter；First filter circuit is three resistance R18, R19, R20 of π type structures
It forms.
The RF switch 16 is HMC536.The RF switch 16 receives at least two-way 171MHz signals, meanwhile, it is described
The output terminal of RF switch 16 is connect with the first attenuator 17, and first attenuator 17 is by third low-pass filter by signal
Output, the attenuator are voltage adjustable attenuator, and the attenuator is HSMP-3814.As shown in figure 5, the access in this circuit
Amplitude mainly adjusts 17 digital attenuations of decaying, end 20dBm gains control by first.Cal_amp is that control electricity adjusts attenuation most
Big voltage is about that electricity adjusts attenuation minimum to 3.2V or so at this time, and voltage reduces attenuation increase, and cal_amp voltage 0.8V when declines
Subtract accessible 20dBm, final output signal signal 2st Mixer.
The signal 2st Mixer of the present embodiment output are finally by the Post Mixer circuit as shown in Figure 14 to Figure 17
Reason, the Post Mixer circuit include, the second frequency mixer 21, which is used for the two paths of signals 2st that will be received
Mixer and 1520MHz signals export after being mixed；In the present embodiment, the second frequency mixer 21 uses RMS-30；First mixing
The output terminal of device 21 passes sequentially through the 6th filter circuit 22, bandpass filter 23, the second low-pass filter 24, third amplifier
25th, third low-pass filter 27 is exported to digital step attenuator 28, and exports 1691BPF；The third amplifier 25 it is defeated
Outlet is connect simultaneously by the 7th filter circuit 26 with+5Vam power supplys；In a particular embodiment, the 6th filter circuit 22 is π types
Tri- resistance of R21, R24, R25 of structure are formed；Bandpass filter 23 uses 1691MHz_BPF；Digital step attenuator is to believe
Signal carries out adjustable attenuation to rf wave in order to control by number ATT3.
Radio frequency filter circuit includes channel filtering circuit and filtering gain circuit, which includes the 4th low pass
Wave filter 31, the input terminal reception input signal of the 4th low-pass filter 31, output terminal and the first digital step attenuator 32
Input terminal connects；In the present embodiment, the output terminal of first digital step attenuator 32 is defeated with third low-pass filter 33
Enter end connection；The output terminal of the third low-pass filter 33 is connect with the input terminal of the second digital step attenuator 34；It is described
The output terminal output echo signal ATT of second digital step attenuator 34；The LE ports of first digital step attenuator 32
Also it is connect by the 8th filter circuit 36 with power supply+3.3Vatt1；The LE ports of second digital step attenuator 34 are also logical
The 9th filter circuit 35 is crossed to connect with power supply+3.3Vatt.
8th filter circuit 36 include the 15th resistance R45 and, the connect respectively with the 15th resistance R45 both ends
37 capacitance C66, the 38th capacitance C72；The 37th capacitance C66, the 38th capacitance C72 are freely terminated
Ground.
9th filter circuit 35 includes sequentially connected third feed through system capacitor F14, the 16th resistance R40；The
The input terminal of three feed through system capacitor F14 is connect with the power supply+3.3Vatt；16th resistance R40 declines with the second digital stepping
Subtract the LE ports connection of device 32.9th filter circuit 35 further includes, the 39th electricity being connect respectively with the 16th resistance both ends
Hold C65, the 40th capacitance C71；The free ending grounding of the 39th capacitance C65, the 40th capacitance C71.
As shown in FIG. 21 to 24, the filtering gain circuit it include the 11st filter circuit 41, the 11st filtering
Circuit 1 is exported after the signal received is filtered to the input terminal of the 4th amplifier 42, the output terminal of the 4th amplifier 42
It is connect by the 12nd filter circuit 43 with power supply, meanwhile, the output terminal of the 4th amplifier 42 also passes through the 13rd filtering
Circuit 44 exports signal to the port 3 of third frequency mixer 45；The port 8 of third frequency mixer 45 passes through the 14th filter circuit
46th, the 5th amplifier 47 exports signal to the port 5 of the 4th frequency mixer 48, meanwhile, the port 5 of the third frequency mixer 45 is logical
The 41st capacitance C337 is crossed to export signal to the port 8 of the 4th frequency mixer 48；As shown in figure 23, the end of third frequency mixer 45
Mouth 1 and port 2 receive signal amp in and signal through in respectively；The two signals are respectively by the end of the second frequency mixer 8
Mouth 2, the output of port 1 feedback；4th frequency mixer, 48 port 3 exports the signal after mixing by the 5th filter circuit 49；
5th amplifier 47 is also connect by the 6th filter circuit 40 with power supply, meanwhile, the output terminal of the 5th amplifier 47 and
The output terminal connection of six filter circuits 40.
11st filter circuit 41 is to be filtered by the π shapes that first resistor R59, second resistance R80,3rd resistor R81 are formed
Structure；13rd filter circuit 44 is to filter knot by the π shapes that the 4th resistance R70, the 5th resistance R82, the 6th resistance R83 are formed
Structure；14th filter circuit 46 is the π shape filter structures being made of the 7th resistance R60, the 8th resistance R55, the 9th resistance R56；
15th filter circuit 49 includes the first low-pass filter F17 and the 5th π shapes being connect with first low-pass filter F17 filter
Wave structure, the 5th π shapes filter structure are made of the 11st resistance R85, the 12nd resistance R86, the 13rd resistance R87；Tenth
Two filter circuits 3 include sequentially connected first feed through system capacitor F15, the 5th inductance L6, the electricity of the tenth resistance R140 and the 6th
Feel L16；The input terminal of first feed through system capacitor F15 is connect with power supply；The free end of 6th inductance L16 and the 4th amplifier 42
Output terminal connection；The output terminal of first feed through system capacitor F15 is grounded by the 42nd capacitance C98；5th inductance L6 with
Tenth resistance R140 is grounded simultaneously by the 43rd capacitance C99；Tenth resistance R140 and the 6th inductance L16 pass through the 4th simultaneously
14 capacitance C248 are grounded.
16th filter circuit 40 includes the second feed through system capacitor F16；The output terminal of second feed through system capacitor F16 with
The port 4 of 5th amplifier 47 connects；The output terminal of second feed through system capacitor F16 also passes through the 45th capacitance respectively simultaneously
C78, the 46th capacitance C116 are grounded.
Claims (9)
1. a kind of signal source circuit, which is characterized in that including,
Control circuit, the control circuit is used to control the work of radio frequency combiner circuit, including CPU, regulator circuit and interface
Circuit；
Radio frequency combiner circuit, the radio frequency combiner circuit include digital baseband or DDS circuit, mixting circuit, radio frequency filter circuit
And level control circuit；
The mixting circuit includes intermediate-freuqncy signal source, and the intermediate-freuqncy signal source is used to generate 21.4MHz intermediate-freuqncy signals；It passes through
One low-pass filter is connect with an input terminal of the first frequency mixer；Another input terminal of first frequency mixer receives
149.6MHz signals, the 149.6MHz signals pass sequentially through the first amplification filter with 21.4MHz signals after the mixing of the first frequency mixer
171MHz signals are exported after wave circuit, the second filtering and amplifying circuit to RF switch；The RF switch receives at least two-way
171MHz signals, meanwhile, the output terminal of the RF switch is connect with the first attenuator, and first attenuator is low by third
Bandpass filter exports signal；The attenuator is voltage adjustable attenuator.
2. circuit as described in claim 1, which is characterized in that the regulator circuit includes external power interface circuit；
The first port of the external power interface circuit, second port access -5V external power supplys, at the first filter circuit
After reason, to objective circuit output -5V power supplys；
Third port, the 4th port access+5.5V external power supplys are steady by first respectively after being handled by the second filter circuit
Volt circuit, the second regulator circuit, third regulator circuit, the 4th regulator circuit are to objective circuit output+5.5V power supplys；
Fifth port, the 6th port are simultaneously grounded after connecing；
7th port, the 8th port access+5V external power supplys, after being handled by third filter circuit, respectively by the 5th voltage stabilizing
Circuit, the 6th regulator circuit are to objective circuit output+3.3V power supplys；+ 5V the external power supplys also pass sequentially through third filtered electrical
Output+2.5V power supplys behind road and the processing of the 7th regulator circuit；
9th port, the tenth port are simultaneously grounded after connecing；
It is defeated to handle backward objective circuit by the 4th filter circuit for tenth Single port, the tenth Two-port netwerk access+3.3V external power supplys
Go out+3.3V power supplys.
3. circuit as claimed in claim 2, which is characterized in that first filter circuit includes the once connect first filtering
Device and the first inductance；
The both ends of first inductance pass through the first capacitance, the second capacity earth respectively；First inductance and the second capacitance connect
One end for connecing while also by third capacity earth.
4. circuit as claimed in claim 2, which is characterized in that second filter circuit include the second inductance, described second
One end of inductance is connect with+5.5V external power supplys, and other end is+5V power output ends；Meanwhile the both ends of second inductance
Pass through the 4th capacitance and the 5th capacity earth respectively；One end of second inductance and the 5th capacitance connection also passes through the 6th respectively
Capacitance, the 7th capacity earth；
First regulator circuit includes the first voltage-stablizer；The input terminal of first voltage-stablizer is the same as the output of the second filter circuit
End connection, the input terminal of first voltage-stablizer also by the 8th capacity earth, meanwhile, the output terminal of first voltage-stablizer point
Do not pass through the 9th capacitance, the tenth capacity earth；
Second regulator circuit includes the second voltage-stablizer, the output of same second filter circuit of input terminal of second voltage-stablizer
End connection, the input terminal of second voltage-stablizer also by the 11st capacity earth, meanwhile, the output terminal of second voltage-stablizer
Pass through the 12nd capacitance, the 13rd capacity earth respectively；
The third regulator circuit includes third voltage-stablizer, the output of same second filter circuit of input terminal of the third voltage-stablizer
End connection, the input terminal of the third voltage-stablizer also by the 14th capacity earth, meanwhile, the output terminal of the third voltage-stablizer
Pass through the 15th capacitance, the 16th capacity earth respectively；
4th regulator circuit includes the 4th voltage-stablizer, the output of same second filter circuit of input terminal of the 4th voltage-stablizer
End connection, the input terminal of the 4th voltage-stablizer also by the 17th capacity earth, meanwhile, the output terminal of the 4th voltage-stablizer
Pass through the 18th capacitance, the 19th capacity earth respectively.
5. circuit as claimed in claim 2, which is characterized in that the third filter circuit includes third inductance；The third
The input terminal of inductance is connect with+5V external power supplys, while the input terminal also passes through the 20th capacity earth；The third inductance
Output terminal is+5V power supplys, while the output terminal also passes through the 21st capacitance, the 22nd capacity earth respectively；
5th regulator circuit includes the 5th voltage-stablizer, the input terminal of the 5th voltage-stablizer and the output of third filter circuit
End connection, the input terminal of the 5th voltage-stablizer also pass through the 23rd capacitance, the 24th capacity earth respectively；Meanwhile institute
State the output terminal of the 5th voltage-stablizer also by and the 25th capacitance, the 26th capacity earth that connect；
6th regulator circuit includes the 6th voltage-stablizer, the input terminal of the 6th voltage-stablizer and the output of third filter circuit
End connection, the input terminal of the 6th voltage-stablizer also pass through the 27th capacitance, the 28th capacity earth respectively；Meanwhile institute
State the output terminal of the 6th voltage-stablizer also by and the 29th capacitance, the 30th capacity earth that connect；
7th regulator circuit includes the 7th voltage-stablizer, and the input of the 7th voltage-stablizer N12 also passes through the 31st capacitance
Ground connection；Meanwhile the output terminal of the 7th voltage-stablizer also passes through the 32nd capacity earth.
6. circuit as claimed in claim 2, which is characterized in that the 4th filter circuit includes the 4th inductance being sequentially connected in series
And second filter；
The input terminal of 4th inductance is connect with+3.3 V external power supplys, meanwhile, the input terminal of the 4th inductance also passes through
33rd capacity earth；
The output terminal of 4th inductance passes through the 34th capacitance, the 35th capacitance, the 36th capacity earth respectively.
7. circuit as described in claim 1, which is characterized in that first filtering and amplifying circuit includes the sequentially connected 5th
Filter circuit, the first amplifier and the first low-pass filter.
8. circuit as claimed in claim 7, which is characterized in that the 5th filter circuit is three resistance structures of π type structures
Into.
9. circuit as described in claim 1, which is characterized in that second filtering and amplifying circuit includes sequentially connected second
Amplifier and the second low-pass filter.
Priority Applications (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107835016A (en) * | 2017-12-08 | 2018-03-23 | 成都前锋电子仪器有限责任公司 | A kind of signal source circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107835016A (en) * | 2017-12-08 | 2018-03-23 | 成都前锋电子仪器有限责任公司 | A kind of signal source circuit |
| CN107835016B (en) * | 2017-12-08 | 2024-01-30 | 成都前锋电子仪器有限责任公司 | Signal source circuit |
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