CN201491009U - Simple ultra-wideband receiver circuit - Google Patents
Simple ultra-wideband receiver circuit Download PDFInfo
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- CN201491009U CN201491009U CN2009200476864U CN200920047686U CN201491009U CN 201491009 U CN201491009 U CN 201491009U CN 2009200476864 U CN2009200476864 U CN 2009200476864U CN 200920047686 U CN200920047686 U CN 200920047686U CN 201491009 U CN201491009 U CN 201491009U
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Abstract
The utility model relates to an ultra-wideband receiver circuit, in particular to an ultra-wideband receiver circuit with simple structure. The ultra-wideband receiver circuit comprises a sampling accumulation circuit, a filter circuit, an amplification circuit and a secondary circuit, which are connected in turn. The ultra-wideband receiver circuit only needs one path of input and only can use an antenna, which greatly lowers the complication of a system, lessens the overall dimension of the system, and reduces the production cost. An ultra low-pass filter is installed in a single-sided receiver, can provide ultra low cut-off frequency, sharply obstructs attenuation, can filter away unnecessary noise signal, and greatly improves the signal-to-noise ratio of the receiver.
Description
Technical field
The utility model relates to a kind of ultra-broadband receiver circuit, especially a kind of ultra-broadband receiver circuit simple in structure.
Background technology
The ultra broadband receiving system has very big absolute bandwidth, there are some new technical problems in it at aspects such as target echo model, target detection, clutter suppression method, signal processing, system's formations, and conventional processing procedure is successively the ultra broadband echo-signal to be carried out amplification filtering, sampling, analog-to-digital conversion, Digital Signal Processing, terminal processes.Such ultra wideband receiver design difficulty is big, system complex, cost are higher.In some simple and easy hand-held detecting devicess, rationally control cost and whether practical volume be system's key 2 points.As shown in Figure 1, be the ultra-broadband receiver circuit structure of differential configuration, positive and negative input is connected respectively to antenna separately, like this makes the structure of system become complicated more with regard to the quantity that has increased reception antenna.Though partial noise that the external devices filtering has been passed through in the differential amplification of rear end, noise still exists, and still can cause the information of output error.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of simple ultra-broadband receiver circuit is provided, and can realize the moving-target measuring ability to the ultra broadband echo-signal, and is simple, efficient, cheap.
According to the technical scheme that the utility model provides, described simple ultra-broadband receiver circuit comprises sampling summation circuit, filter circuit, amplifying circuit and the second amplifying circuit that connects successively.
Described sampling summation circuit comprises first electric capacity and first resistance that is in series, and described first electric capacity connects input signal, and the node between first electric capacity and the input signal is by the first build-out resistor ground connection; Node between first electric capacity and first resistance connects the anode of diode, and the negative electrode of diode is by the second build-out resistor ground connection; Node between first resistance and the described filter circuit connects bias voltage by second resistance.
Described filter circuit comprises first amplifier, and the positive input terminal of first amplifier is connected with described sampling summation circuit; The negative input end that the 3rd electric capacity that the output process of first amplifier is in parallel and the 3rd resistance are connected to first amplifier; The negative input end of first amplifier is through the 4th resistance and the 4th capacity earth of series connection; The output of first amplifier is the output of described filter circuit.
Described amplifying circuit comprises that the input of low pass filter connects the output of filter circuit, and the clock pin of low pass filter is by the 5th capacity earth; The output of low pass filter is the output of described amplifying circuit.
Described second amplifying circuit comprises the positive input terminal ground connection of second amplifier, and the negative input end of second amplifier is connected the output of described amplifying circuit successively with the 6th electric capacity by the 6th resistance; The output of second amplifier is connected the negative input end of second amplifier with the 7th resistance through the 7th electric capacity in parallel; The output of second amplifier is the output of described second amplifying circuit.
The positive input terminal of described first amplifier is by second capacity earth.
The utility model has the advantages that: only need one tunnel input, can only use an antenna, greatly reduce the complexity of system, reduced the size of whole system, reduced cost of manufacture simultaneously; Add a utmost point low pass filter in single-ended receiver, this utmost point low pass filter can provide the cut-off frequency of extremely low frequency, and very sharp keen stopband attenuation can filter out unwanted noise signal, has improved the signal to noise ratio of receiver greatly.
Description of drawings
Fig. 1 is the ultra-broadband receiver circuit structure chart of differential configuration.
Fig. 2 is a circuit structure diagram of the present utility model.
Fig. 3 is circuit theory diagrams of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
The utility model is single-ended receiver circuit, only needs one tunnel input, as shown in Figure 2, comprises the sampling summation circuit, filter circuit, amplifying circuit and the second amplifying circuit that connect successively.
As shown in Figure 3, the input of super bandwidth receiver connects the positive input terminal of first capacitor C 1 and first resistance R, 1 to first amplifier A1 successively through coaxial wire; Node between first capacitor C 1 and the input signal is by the first build-out resistor RT1 ground connection; First capacitor C 1 forms the signal integration device, the electric current decision that provided by second resistance R 2 discharge time of first capacitor C 1; Second resistance R 2 connects positive input terminal and the bias voltage of the first amplifier A1.The representative value of second resistance R 2 is M Ω orders of magnitude, and the representative value of first capacitor C 1 is 0.01 μ F.
First resistance R 1 is kept apart the ultra wide band frequency and the first amplifier A1, and the value of first resistance R 1 must be greater than the first build-out resistor RT1, but neither be too high, makes noise reduce.Its representative value is 10K Ω.
The positive input terminal that second capacitor C 2 is placed on the first amplifier A1 increases isolation to ground, and prevents that the radio frequency in the ultra broadband input from appearing at amplifier input terminal, otherwise, can cause the circuit instability.The baseband voltage of detecting amplifier input.
The input of low pass filter F1 is linked in the output of the first amplifier A1, here adopt the MAX291 low pass filter, the CLK pin of low pass filter F1 is through the 5th capacitor C 5 ground connection, and by the cut-off frequency of the 5th capacitor C 5 control low pass filter F1, its representative value is 30nF.The GND pin ground connection of low pass filter F1, the OP IN pin of low pass filter F1 links to each other with OP OUT pin.
The output of low pass filter F1 is through the 6th capacitor C 6 of series connection and the negative input end of the 6th resistance R 6 to second amplifier A2, the positive input terminal ground connection of the second amplifier A2.The negative input end that the 7th capacitor C 7 that the output process of the second amplifier A2 is in parallel and the 7th resistance R 7 turn back to it.The negative input end that the 3rd capacitor C 3 that the output process of the first amplifier A1 is in parallel and the 3rd resistance R 3 turn back to it.The negative input end of the first amplifier A1 arrives ground through the 4th capacitor C 4 and the 4th resistance R 4 of series connection.The first amplifier A1 and the second amplifier A2 are operational amplifiers.The 6th capacitor C 6-the 6th resistance R 6 and the 7th capacitor C 7-the 7th resistance R 7 are separately as differentiator and integrator, and perhaps combining becomes a base band band pass filter.
The anode of diode D1 is connected on the node between first capacitor C 1 and first resistance R 1, and negative electrode connects the second build-out resistor RT2, the second build-out resistor RT2 other end ground connection.
Circuit described in the utility model can be realized two-sided deposited copper, components and parts marshalling by double-deck FR4 circuit board, rationally arrange the position of filter capacitor, power line adopts star connection, live width 0.4mm, holding wire is by minimum range wiring, live width 0.254mm, the good earth of attention circuit board and shell.
Realize that needed chip of foregoing circuit and device all are devices commonly used, design debug is not difficult, and cost is lower, is fit to produce in batches.
Receiver described in the utility model can provide high sensitivity and high-gain, and its high sensitivity is obtained by high-caliber signal integration and high detection efficient, shows that the uncorrelated noise source is removed through pulse integration and filtering.Sampling summation circuit integration of the present utility model or average, last 10000 pulses that add up reach the inhibition of high sensitivity and irrelevant signal.
The utility model is to design for receiving ultra-broadband signal specially, and is simple, compact, low-cost, also has high sensitivity.And it is operated in high repetition frequency, has outstanding noise suppressing system, is mainly used in the radio ultra wide band system of high repetition frequency, low peak power.
Claims (6)
1. a simple ultra-broadband receiver circuit is characterized in that: comprise the sampling summation circuit, filter circuit, amplifying circuit and the second amplifying circuit that connect successively.
2. a kind of simple ultra-broadband receiver circuit as claimed in claim 1, it is characterized in that described sampling summation circuit comprises first electric capacity (C1) and first resistance (R1) that is in series, described first electric capacity (C1) connects input signal, and the node between first electric capacity (C1) and the input signal is by first build-out resistor (RT1) ground connection; Node between first electric capacity (C1) and first resistance (R1) connects the anode of diode (D1), and the negative electrode of diode (D1) is by second build-out resistor (RT2) ground connection; Node between first resistance (R1) and the described filter circuit connects bias voltage by second resistance (R2).
3. a kind of simple ultra-broadband receiver circuit as claimed in claim 1 is characterized in that described filter circuit comprises first amplifier (A1), and the positive input terminal of first amplifier (A1) is connected with described sampling summation circuit; The negative input end that the 3rd electric capacity (C3) that the output process of first amplifier (A1) is in parallel and the 3rd resistance (R3) are connected to first amplifier (A1); The negative input end of first amplifier (A1) is through the 4th resistance (R4) and the 4th electric capacity (C4) ground connection of series connection; The output of first amplifier (A1) is the output of described filter circuit.
4. a kind of simple ultra-broadband receiver circuit as claimed in claim 1 is characterized in that described amplifying circuit comprises that the input of low pass filter (F1) connects the output of filter circuit, and the clock pin of low pass filter (F1) is by the 5th electric capacity (C5) ground connection; The output of low pass filter (F1) is the output of described amplifying circuit.
5. a kind of simple ultra-broadband receiver circuit as claimed in claim 1, it is characterized in that described second amplifying circuit comprises the positive input terminal ground connection of second amplifier (A2), the negative input end of second amplifier (A2) is connected the output of described amplifying circuit successively with the 6th electric capacity (C6) by the 6th resistance (R6); The output of second amplifier (A2) is connected the negative input end of second amplifier (A2) with the 7th resistance (R7) through the 7th electric capacity (C7) in parallel; The output of second amplifier (A2) is the output of described second amplifying circuit.
6. a kind of simple ultra-broadband receiver circuit as claimed in claim 3, the positive input terminal that it is characterized in that described first amplifier (A1) is by second electric capacity (C2) ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200476864U CN201491009U (en) | 2009-07-21 | 2009-07-21 | Simple ultra-wideband receiver circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200476864U CN201491009U (en) | 2009-07-21 | 2009-07-21 | Simple ultra-wideband receiver circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201491009U true CN201491009U (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200476864U Expired - Fee Related CN201491009U (en) | 2009-07-21 | 2009-07-21 | Simple ultra-wideband receiver circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101610096B (en) * | 2009-07-21 | 2012-08-29 | 江苏北方湖光光电有限公司 | Simple ultra-broadband receiver circuit |
-
2009
- 2009-07-21 CN CN2009200476864U patent/CN201491009U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101610096B (en) * | 2009-07-21 | 2012-08-29 | 江苏北方湖光光电有限公司 | Simple ultra-broadband receiver circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20150721 |
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| EXPY | Termination of patent right or utility model |