CN206195737U - Be applied to multi -frequency radio -frequency signal source's attenuator circuit - Google Patents
Be applied to multi -frequency radio -frequency signal source's attenuator circuit Download PDFInfo
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- CN206195737U CN206195737U CN201621216230.2U CN201621216230U CN206195737U CN 206195737 U CN206195737 U CN 206195737U CN 201621216230 U CN201621216230 U CN 201621216230U CN 206195737 U CN206195737 U CN 206195737U
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- resistance
- diode
- electric capacity
- circuit
- attenuator circuit
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Abstract
The utility model discloses a be applied to multi -frequency radio -frequency signal source's attenuator circuit, including diode attenuator circuit, diode attenuator circuit includes signal input part IN, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C5, electric capacity C6, electric capacity C7, diode V8, diode V9, diode V10, signal output part OUT, signal input part IN is connected with diode V8's positive pole, and diode V8's negative pole and diode V9's positive pole are connected, and diode V9's negative pole and signal output part OUT are connected. The utility model discloses use a plurality of PIN diodes, constitute two branch roads, reach the unchangeable characteristic of impedance, through selecting suitable diode bias current for the impedance of two upper and lower branch roads is followed the input and is seen into the resistance that remains throughout certain, thereby the impedance mismatch's of the wave filter before the attenuator circuit influence falls to minimumly among the messenger radio -frequency signal source.
Description
Technical field
The utility model is related to attenuator circuit, and in particular to be applied to the attenuator circuit of multi-frequency radio-frequency signal source.
Background technology
PIN diode has characteristic known to and special, that is, its resistance at radio frequencies can be with covariant biased electrical
The change of stream and change.Single PIN diode attenuator is very simple, but so simple design be extremely difficult to it is good
Good impedance matching, because the impedance of diode can change with the change of bias voltage, in multi-frequency radio-frequency signal source, declines
Filter circuit is connected with before powered down road, bad impedance matching can bring problem between them, because being connected to attenuator
The response of wave filter would generally change because of the difference of load.
Utility model content
Technical problem to be solved in the utility model is that the impedance of diode can change with the change of bias voltage,
Bad impedance matching can bring problem between attenuator and the wave filter of connection, it is therefore intended that offer is applied to multi-frequency radio frequency
The attenuator circuit of signal source, using multiple PIN diodes, constitutes two branch roads, makes the impedance operator of attenuator circuit constant, makes to decline
Influence of the powered down road to the impedance mismatching of the wave filter for connecting is preferably minimized degree.
The utility model is achieved through the following technical solutions：
It is applied to the attenuator circuit of multi-frequency radio-frequency signal source, including diode attenuator circuit, diode attenuator circuit bag
Include signal input part IN, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C5, electric capacity C6, electric capacity C7, diode V8, two poles
Pipe V9, diode V10, signal output part OUT, the signal input part IN are connected with the anode of diode V8, diode V8's
Negative electrode is connected with the anode of diode V9, and the negative electrode of diode V9 is connected with signal output part OUT；Electric capacity C5 one end is connected to two
The anode of pole pipe V8, its other end is connected with the anode of diode V10, and the negative electrode of diode V10 connects with the negative electrode of diode V9
Connect；Described resistance R1 one end is connected with signal input part IN, its other end ground connection；Described resistance R2 one end be connected to resistance R1 with
On the circuit of signal input part IN connections, its other end ground connection；Resistance R3 one end is connected to one end of resistance R2 ground connection, and its is another
End is connected with electric capacity C6；The other end ground connection that electric capacity C6 is connected with resistance R3, connects just on the circuit that electric capacity C6 is connected with resistance R3
12V voltages.Diode V8, diode V9, diode V10 use PIN diode, using multiple PIN diodes, constitute two
Branch road, reaches constant impedance operator, influence of the attenuator circuit to the impedance mismatching of the wave filter for connecting is preferably minimized degree.
Further, the attenuator circuit of multi-frequency radio-frequency signal source is applied to, also including control input terminal circuit, the control
Inlet circuit processed includes resistance R5, resistance R6, potentiometer R7, electric capacity C8, inductance L2, control signal ATT, the inductance L2
One end is connected on the circuit that electric capacity C5 is connected with diode V10, and its other end is connected with control signal ATT, electric capacity C8 mono-
End is connected on the circuit that inductance L2 is connected with control signal ATT, its other end ground connection；The centre cap connection of potentiometer R7
On the circuit that inductance L2 is connected with electric capacity C8, the positive 12V voltages of termination of resistance R5, the fixation of its other end and potentiometer R7
Upper end connects, and the fixed lower end of potentiometer R7 is connected with one end of resistance R6, the other end ground connection of resistance R6.Adjust for convenience
Examination, increased the control voltage that the centre cap of a route potentiometer R7 is provided in circuit；When control signal ATT voltages are inadequate
Gao Shi, the rf attenuation amount of whole attenuator circuit is very big, when control signal ATT voltages are higher, the radio frequency of whole attenuator
Attenuation reduces, and when the control of control signal ATT voltages is to a certain degree, the rf attenuation amount of attenuator circuit can reach most
It is small.
Further, it is also associated with being input into modulate circuit between signal input part IN and diode V8, the input is adjusted
Reason circuit include resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, electric capacity C3, crystal oscillator F1, signal input part IN with
It is connected with resistance R8, crystal oscillator F1, resistance R12, electric capacity C3 on the circuit of diode V8 connections in turn, described resistance R11 one end connects
It is connected on the circuit that resistance R8 is connected with crystal oscillator F1, its other end ground connection；Resistance R9 one end is connected to signal input part IN with electricity
On the circuit of resistance R8 connections, its other end is connected with one end of resistance R10, the other end ground connection of resistance R10.It is using crystal oscillator F1
Attenuator circuit provides basic clock signal, and the resistance for using plays a part of current limliting, step-down, boosting.
The utility model compared with prior art, has the following advantages and advantages：The utility model uses multiple
PIN diode, constitutes two branch roads, the constant characteristic of impedance is reached, by selecting suitable diode bias current so that on
The impedance of lower two branch roads enters to remain at certain resistance from terms of input, so that attenuator circuit in radio-frequency signal source
The influence of the impedance mismatching of wave filter before is preferably minimized.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, constitutes the one of the application
Part, does not constitute the restriction to the utility model embodiment.In the accompanying drawings：
Fig. 1 is the utility model structural representation.
Specific embodiment
To make the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, is not intended as to restriction of the present utility model.
Embodiment
As shown in figure 1, the attenuator circuit of multi-frequency radio-frequency signal source is applied to, including diode attenuator circuit, described two
Pole pipe attenuator circuit includes signal input part IN, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C5, electric capacity C6, electric capacity
C7, diode V8, diode V9, diode V10, electric capacity C9, signal output part OUT, the signal input part IN and diode
The anode connection of V8, the negative electrode of diode V8 is connected with the anode of diode V9, negative electrode and the signal output part OUT of diode V9
Connection, electric capacity C9 is connected on the circuit that diode C9 is connected with signal output part OUT；Electric capacity C5 one end is connected to diode V8
Anode, its other end is connected with the anode of diode V10, and the negative electrode of diode V10 is connected with the negative electrode of diode V9；It is described
Resistance R1 one end is connected with signal input part IN, its other end ground connection；It is defeated with signal that described resistance R2 one end is connected to resistance R1
Enter to hold on the circuit of IN connections, its other end ground connection；Resistance R3 one end is connected to one end of resistance R2 ground connection, its other end and electricity
Hold C6 connections；That one end of resistance R2 and resistance R3 ground connection is also associated with the right-hand member of electric capacity C4, electric capacity C4 left ends ground connection；Electric capacity C6
The other end ground connection being connected with resistance R3, connects positive 12V voltages on the circuit that electric capacity C6 is connected with resistance R3.Control signal electricity
Road, the control input terminal circuit includes resistance R5, resistance R6, potentiometer R7, electric capacity C8, inductance L2, control signal ATT,
Described inductance L2 one end is connected on the circuit that electric capacity C5 is connected with diode V10, and its other end connects with control signal ATT
Connect, electric capacity C8 one end is connected on the circuit that inductance L2 is connected with control signal ATT, its other end ground connection；Potentiometer R7's
Centre cap is connected on the circuit that inductance L2 is connected with electric capacity C8, and the one of resistance R5 terminates positive 12V voltages, its other end and electricity
The fixed upper end connection of position device R7, the fixed lower end of potentiometer R7 is connected with one end of resistance R6, and the other end of resistance R6 is grounded.
Be also associated between signal input part IN and diode V8 be input into modulate circuit, the input modulate circuit include resistance R8,
Resistance R9, resistance R10, resistance R11, resistance R12, electric capacity C3, crystal oscillator F1, the circuit that signal input part IN is connected with diode V8
On be connected with resistance R8, crystal oscillator F1, resistance R12, electric capacity C3 in turn, described resistance R11 one end is connected to resistance R8 and crystal oscillator F1
On the circuit of connection, its other end ground connection；Resistance R9 one end is connected on the circuit that signal input part IN is connected with resistance R8, its
The other end is connected with one end of resistance R10, the other end ground connection of resistance R10.
Control signal ATT is the control voltage input port of attenuator circuit, when the voltage of control signal ATT is not high enough
When, because diode V10 is in reverse-biased, so the electric current for flowing through diode V10 is minimum, the resistance of diode V10 is very big,
So that the resistance of the branch road radio frequency path of electric capacity C5 and diode V10 is very big, and now diode V8 and diode V9 branch roads
Direct current forward bias is obtained from resistance R1, resistance R2, resistance R3, resistance R4, there is electric current to flow through diode V8 and diode V9, made
Diode V8 and diode V9 is presented relatively low impedance, so that the impedance of the radio frequency path of diode V8, electric capacity C7 composition is very
Low, radio-frequency power switches to ground from the branch road so that the rf attenuation amount of whole attenuator circuit is very big.
When the control voltage of control input port ATT is higher, diode V10 obtain forward bias, so as to have electric current from
On flow through, the electric current can improve the voltage at its two ends while diode V10 impedances are reduced on resistance R4, so that two poles
The DC bias current reduction of pipe V8 and diode V9, improves the impedance of diode V8 and diode V9, so that diode V8,
The impedance of the radio frequency path of electric capacity C7 compositions is uprised so that the rf attenuation amount of whole attenuator reduces.
When the control voltage of control input port ATT it is high to a certain extent when, electric current reaches maximum, two on diode V10
Pole pipe V10 impedances change to minimum, and now the direct current biasing of diode V8 and diode V9 becomes reverse bias, and impedance is changed to most
Greatly, so that the impedance of the radio frequency path of diode V8, electric capacity C7 composition changes to highest, so that the radio frequency of whole attenuator circuit
Attenuation reaches minimum.
In sum, two AC impedances of radio frequency path are presented Negative correlation, always become in an impedance for branch road
When big, the impedance of another branch road diminishes, and by selecting suitable operating point, can make the input and output impedance of whole attenuator
Certain resistance is maintained at, impedance mismatching is minimized.
The component model used in the present embodiment is as follows：
Resistance R1-39K ohm, resistance R2-22K ohm, resistance R3-12K ohm, resistance R4-2.7K ohm, resistance R5-
4.7K ohm, resistance R6-4.7K ohm, resistance R8-10K ohm, resistance R9-10K ohm, resistance R10-10K ohm, resistance
R11-10K ohm, resistance R12-10K ohm, electric capacity C3-100nF, electric capacity C5-100nF, electric capacity C6-100nF, electric capacity C7-
100nF, electric capacity C8-100nF, diode V8-2K4C, diode V9-2K4C, diode V10-2K4C, potentiometer R7-10K Europe
Nurse, inductance L2-0.33H.
Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect
One step is described in detail, be should be understood that and be the foregoing is only specific embodiment of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, equally replaces
Change, improve, should be included within protection domain of the present utility model.
Claims (3)
1. the attenuator circuit of multi-frequency radio-frequency signal source is applied to, it is characterised in that including diode attenuator circuit, two pole
Pipe attenuator circuit include signal input part IN, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C5, electric capacity C6, electric capacity C7,
Diode V8, diode V9, diode V10, the anode of signal output part OUT, the signal input part IN and diode V8 connect
Connect, the negative electrode of diode V8 is connected with the anode of diode V9, the negative electrode of diode V9 is connected with signal output part OUT；Electric capacity
C5 one end is connected to the anode of diode V8, and its other end is connected with the anode of diode V10, the negative electrode of diode V10 and two
The negative electrode connection of pole pipe V9；Described resistance R1 one end is connected with signal input part IN, its other end ground connection；Described resistance R2 one end
It is connected on the circuit that resistance R1 is connected with signal input part IN, its other end ground connection；Resistance R3 one end is connected to resistance R2 and connects
The one end on ground, its other end is connected with electric capacity C6；The other end ground connection that electric capacity C6 is connected with resistance R3, electric capacity C6 and resistance R3 connects
Positive 12V voltages are connect on the circuit for connecing.
2. the attenuator circuit for being applied to multi-frequency radio-frequency signal source according to claim 1, it is characterised in that also including control
Inlet circuit processed, the control input terminal circuit includes resistance R5, resistance R6, potentiometer R7, electric capacity C8, inductance L2, control
Input ATT, described inductance L2 one end is connected on the circuit that electric capacity C5 is connected with diode V10, and its other end is defeated with control
Enter and hold ATT to connect, electric capacity C8 one end is connected on the circuit that inductance L2 is connected with control signal ATT, its other end ground connection；Electricity
The centre cap of position device R7 is connected on the circuit that inductance L2 is connected with electric capacity C8, and the one of resistance R5 terminates positive 12V voltages, and its is another
One end is connected with the fixed upper end of potentiometer R7, and the fixed lower end of potentiometer R7 is connected with one end of resistance R6, and resistance R6's is another
One end is grounded.
3. the attenuator circuit for being applied to multi-frequency radio-frequency signal source according to claim 1, it is characterised in that defeated in signal
Enter to hold and be also associated with being input into modulate circuit between IN and diode V8, the input modulate circuit includes resistance R8, resistance R9, electricity
Resistance R10, resistance R11, resistance R12, electric capacity C3, crystal oscillator F1, connect successively on the circuit that signal input part IN is connected with diode V8
Resistance R8, crystal oscillator F1, resistance R12, electric capacity C3 are connected to, described resistance R11 one end is connected to the line that resistance R8 is connected with crystal oscillator F1
Lu Shang, its other end ground connection；Resistance R9 one end is connected on the circuit that signal input part IN is connected with resistance R8, its other end with
One end connection of resistance R10, the other end ground connection of resistance R10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621216230.2U CN206195737U (en) | 2016-11-11 | 2016-11-11 | Be applied to multi -frequency radio -frequency signal source's attenuator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621216230.2U CN206195737U (en) | 2016-11-11 | 2016-11-11 | Be applied to multi -frequency radio -frequency signal source's attenuator circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206195737U true CN206195737U (en) | 2017-05-24 |
Family
ID=58734999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621216230.2U Expired - Fee Related CN206195737U (en) | 2016-11-11 | 2016-11-11 | Be applied to multi -frequency radio -frequency signal source's attenuator circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206195737U (en) |
-
2016
- 2016-11-11 CN CN201621216230.2U patent/CN206195737U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170524 Termination date: 20171111 |