CN200966037Y - High frequency sampler - Google Patents
High frequency sampler Download PDFInfo
- Publication number
- CN200966037Y CN200966037Y CN 200620125180 CN200620125180U CN200966037Y CN 200966037 Y CN200966037 Y CN 200966037Y CN 200620125180 CN200620125180 CN 200620125180 CN 200620125180 U CN200620125180 U CN 200620125180U CN 200966037 Y CN200966037 Y CN 200966037Y
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- diodes
- high frequency
- amplifier
- input terminal
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Abstract
The utility model discloses a high frequency sampling device, and specifically speaking relates to the high sampling device that samples the signals in the process of the signal processing of the radio communication and the radio detection. The high frequency sampling device comprises a differential amplifier, a comparative amplifier, two Schmitt triggers and two diodes. Two differential output terminals of the differential amplifier are respectively connected with the input terminal of one Schmitt trigger; two diodes are connected in series in the same direction and the terminals of the two diodes where the connection in series is not implemented are respectively connected with the output terminals of two Schmitt triggers, and a resistance is respectively connected between the terminals of the two diodes where the connection in series is not implemented and the ground. The terminals of two diodes where the connection in series is implemented are connected with the positive input terminal of the comparative amplifier. The resistance is respectively connected between the negative input terminal of the comparative amplifier and the output terminal of the comparative amplifier and between the negative input terminal of the comparative amplifier and the ground, and a capacitor is also connected between the positive input terminal of the comparative amplifier and the ground. The high frequency sampling device not only can sample with low frequency, but also can realize to sampling with high frequency and has a wider application range.
Description
Technical field
The utility model relates to a kind of electronic circuit.Be specifically in the signal processing of radio communication and radio detection, the high frequency sampling apparatus that signal is sampled.
Background technology
In the signal processing of radio communication and radio detection, be a very important and requisite link to signals sampling.If can not successfully sample to signal, whole system just can't be worked.
Traditional sample circuit mostly is a gate circuit.This gate circuit is by four diodes and joins end to end and form, and by the difference burst pulse clock that amplitude is enough big the signal of input is sampled.The sampling ability of this sample circuit depends on the width of ultra-narrow pulse, and promptly the width of burst pulse should be much smaller than the cycle of the number of accepting and believing.If the frequency of the number of accepting and believing improves, then the width of required pulse is just narrower.But be created in that high frequency repeats to stablize, pulsewidth is less than 1ns even tens ps and burst pulse with certain amplitude unusual difficulty then.Therefore, above-mentioned sample circuit can only carry out low-frequency sampling, is difficult to realize high frequency sampling, and the scope of application is little.
The utility model content
Problem to be solved in the utility model provides a kind of high frequency sampling apparatus.This high frequency sampling apparatus can carry out low-frequency sampling, can realize high frequency sampling again, and is applied widely.
For addressing the above problem, the utility model is taked following scheme:
The characteristics of high frequency sampling apparatus of the present utility model are to contain differential amplifier, comparison amplifier, two Schmidt triggers and two diodes.Two difference output ends of differential amplifier link to each other with the input of a Schmidt trigger respectively.Be in the same way polyphone between two diodes, their non-series side joins with the output of two Schmidt triggers respectively, also is connected to a resistance between their non-series side and ground respectively.The series side of two diodes links to each other with the positive input terminal of comparison amplifier, is connected to a resistance between the negative input end of comparison amplifier and its output and between ground respectively, and also is connected to capacitor between the positive input terminal of comparison amplifier and ground.
Take such scheme, have the following advantages:
Because high frequency sampling apparatus of the present utility model is by differential amplifier, comparison amplifier, two Schmidt triggers and two diodes, two difference output ends of differential amplifier link to each other with a Schmidt trigger input respectively.Be in the same way polyphone between two diodes, their non-series side joins with the output of two Schmidt triggers respectively, also is connected to resistance between their non-series side and ground.The series side of two diodes links to each other with the positive input terminal of comparison amplifier, is connected to resistance between the negative input end of comparison amplifier and its output and between ground respectively, and also is connected to capacitor between the positive input terminal of comparison amplifier and ground.After when clock signal access differential amplifier, by the differential amplifier amplification, can become the very precipitous difference square wave of rising, trailing edge.When a Schmidt trigger output high level, another Schmidt trigger meeting output low level makes satisfactory to both parties diode current flow.At this moment, the signal that is sampled can pass through two diodes, makes entire circuit be in sample states.When a Schmidt trigger output low level, another Schmidt trigger can be exported high level, and two diodes are ended, and entire circuit is in hold mode.Because the output signal level of comparison amplifier is the RF signal level of instantaneous variation, can make hold mode until level upset next time just finishes.This shows, its sampling ability of sample circuit of the present utility model depends on square wave rising, the precipitous degree of trailing edge and the response speed of diode that Schmidt trigger produces, and sample effect depends on the stability of clock and the stability of Schmidt trigger.Therefore, as long as select enough quick and stable Schmidt trigger for use, and provide stable sine wave or square wave clock signal, need not use burst pulse as clock signal, just can realize high frequency sampling, the scope of application is wider.
Description of drawings
Accompanying drawing is a high frequency sampling apparatus electricity principle schematic of the present utility model.
Embodiment
As shown in drawings, high frequency sampling apparatus of the present utility model contains differential amplifier N1, comparison amplifier N2, two Schmidt trigger Q1, Q2 and two diode D1, D2.The input of differential amplifier N1 is the input of sampling clock, and its two difference output ends link to each other with the input of Schmidt trigger Q2 with Schmidt trigger Q1 respectively.The output of Schmidt trigger Q1 is connected on the positive pole of diode D1, and the output of Schmidt trigger Q2 is connected on the negative pole of diode D2.The positive pole of the negative pole of diode D1 and diode D2 is serially connected.Between the positive pole and ground of diode D1, be connected to resistance R 1 and R2 respectively between diode D2 negative pole and the ground.During work, radiofrequency signal RFIN inserts the positive pole of diode D1.The positive input terminal of comparison amplifier N2 is connected on the positive pole of the negative pole of diode D1 and diode D2.Be connected to resistance R 3, R4 between the negative input end of comparison amplifier N2 and its output and between ground respectively, also be connected to capacitor C1 between its positive input terminal and ground.
Claims (1)
1. high frequency sampling apparatus, it is characterized in that comprising differential amplifier (N1), comparison amplifier (N2), two Schmidt triggers (Q1, Q2) and two diodes (D1, D2), two difference output ends of differential amplifier (N1) link to each other with the input of a Schmidt trigger (Q1 or Q2) respectively; Be in the same way polyphone between two diodes (D1, D2), their non-series side joins with the output of two Schmidt triggers (Q1, Q2) respectively, also is connected to a resistance (R1 or R2) between their non-series side and ground respectively; The series side of two diodes (D1, D2) links to each other with the positive input terminal of comparison amplifier (N2), be connected to a resistance (R3 or R4) between the negative input end of comparison amplifier (N2) and its output and between ground respectively, and also be connected to capacitor (C1) between the positive input terminal of comparison amplifier (N2) and ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620125180 CN200966037Y (en) | 2006-11-10 | 2006-11-10 | High frequency sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620125180 CN200966037Y (en) | 2006-11-10 | 2006-11-10 | High frequency sampler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200966037Y true CN200966037Y (en) | 2007-10-24 |
Family
ID=38870056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620125180 Expired - Fee Related CN200966037Y (en) | 2006-11-10 | 2006-11-10 | High frequency sampler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200966037Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1968015B (en) * | 2006-11-10 | 2010-05-26 | 江苏北方湖光光电有限公司 | High frequency sampling device |
| CN106772269A (en) * | 2017-03-03 | 2017-05-31 | 南京邮电大学 | A kind of equivalent sampling circuit of application ground penetrating radar echo signals collection |
-
2006
- 2006-11-10 CN CN 200620125180 patent/CN200966037Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1968015B (en) * | 2006-11-10 | 2010-05-26 | 江苏北方湖光光电有限公司 | High frequency sampling device |
| CN106772269A (en) * | 2017-03-03 | 2017-05-31 | 南京邮电大学 | A kind of equivalent sampling circuit of application ground penetrating radar echo signals collection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |