CN204046583U - High dynamically high-gain broadband receiver - Google Patents
High dynamically high-gain broadband receiver Download PDFInfo
- Publication number
- CN204046583U CN204046583U CN201420369394.3U CN201420369394U CN204046583U CN 204046583 U CN204046583 U CN 204046583U CN 201420369394 U CN201420369394 U CN 201420369394U CN 204046583 U CN204046583 U CN 204046583U
- Authority
- CN
- China
- Prior art keywords
- output
- input
- circuit
- electrically controlled
- controlled attenuator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Abstract
The utility model discloses a kind of high dynamically high-gain broadband receiver, comprise radio-frequency (RF) front-end circuit, multistage electrically controlled attenuator circuit, two-stage mixting circuit and multistage gain amplifier, wherein, described radio-frequency (RF) front-end circuit forms primarily of first order electrically controlled attenuator, LNA and first order gain amplifier; Described multistage electricity adjusts attenuator circuit to be made up of electrically controlled attenuator, integrating circuit, detection tube and power splitter; Described two-stage mixting circuit is primarily of the frequency mixer in two broadbands and local oscillator composition; Described multistage gain amplifier is made up of multiple gain amplifier, the cascade of multistage gain amplifier.The effect that the utility model is useful: (1) the utility model can realize the high-gain dynamic range of receiver, and radio frequency bandwidth widened by multistage mixting circuit, multistage gain amplifier ensures high-gain; (2) the utility model makes whole receiver link adopt pure analog circuit, and without the need to digital interface, debugging is convenient, increases work efficiency; (3) the utility model improves the reliability of product, and fitness is large, and antijamming capability is strong.
Description
Technical field
The utility model belongs to moving communicating field, relates to a kind of high dynamically high-gain broadband receiver.
Background technology
At present; in our mobile communication product; the gain of receiver is done higher and higher; receiver sensitivity requires also more and more harsher; the signal that antenna sometimes receives is larger; often have influence on receiver normally to use; nowadays when the signal that antenna opening receives often can run into and grow from weak to strong; wish the normal work not affecting receiver this time; namely when the signal that antenna opening receives is very strong or very weak time; wish that the intermediate frequency power output of receiver is all constant, this just needs the receiver designing a high dynamic range, high-gain.Sometimes this receiver still can not meet the requirement of communication, and often present radiofrequency signal is all very wide, and enter into traditional receiver and can bring into much spuious, this just requires the receiver in a broadband.
Summary of the invention
Technical problem to be solved in the utility model successively starts to control electrically controlled attenuator to realize the high-gain dynamic range of receiver by multistage electrically controlled attenuator, and radio frequency bandwidth widened by multistage mixting circuit, and multistage gain amplifier ensures high-gain.
The purpose of this utility model is the deficiency overcoming prior art existence, and a kind of high dynamically high-gain broadband receiver is provided, multistage mixting circuit improves radiofrequency signal bandwidth, multistage electrically controlled attenuator successively starts to control and realizes high-gain dynamic range fast, the cascade of multistage gain amplifier realizes high-gain, and the pure analog circuit of whole receiver link, without the need to digital interface, debugging is convenient, enhances productivity.
The purpose of this utility model has been come by following technical solution.The dynamic high-gain broadband receiver of this height, comprise radio-frequency (RF) front-end circuit, multistage electricity adjusts attenuator circuit, two-stage mixting circuit and multistage gain amplifier, wherein, described radio-frequency (RF) front-end circuit forms primarily of first order electrically controlled attenuator, LNA and first order gain amplifier, described multistage electricity adjusts attenuator circuit to be made up of electrically controlled attenuator, integrating circuit, detection tube and power splitter, described two-stage mixting circuit is primarily of the frequency mixer in two broadbands and local oscillator composition, described multistage gain amplifier is made up of multiple gain amplifier, the cascade of multistage gain amplifier, the input of first order electrically controlled attenuator is connected to antenna opening, its output is connected to the input of LNA, the output of LNA is connected to the input of first order gain amplifier, the output of first order gain amplifier is connected to the input of the first power splitter, an output of the first power splitter is connected to the input of first detector, the output of first detector is connected to the input of first integral circuit, the output of first integral circuit is connected to the voltage controling end of first order electrically controlled attenuator, another output of first power splitter is connected to the input of filter a, the output of filter a is connected to the input of frequency mixer a, the output of frequency mixer a is connected to the input of filter b, the output of filter b is connected to the input of second level electrically controlled attenuator, the output of second level electrically controlled attenuator is connected to the input of second level gain amplifier, the output of second level gain amplifier is connected to the input of the second power splitter, an output of the second power splitter is connected to the input of second detector, the output of second detector is connected to the input of second integral circuit, the output of second integral circuit is connected to the voltage controling end of second level electrically controlled attenuator, another output of second power splitter is connected to the input of filter c, the output of filter c is connected to the input of frequency mixer b, the output of frequency mixer b is connected to the input of filter d, the output of filter d is connected to the input of third level electrically controlled attenuator, the output of third level electrically controlled attenuator is connected to the input of third level gain amplifier, the output of third level gain amplifier is connected to the input of the 3rd power splitter, an output of the 3rd power splitter is connected to the input of third detector, the output of third detector is connected to the input of third integral circuit, the output of third integral circuit is connected to the voltage controling end of third level electrically controlled attenuator, another output of 3rd power splitter is connected to the input of next stage electrically controlled attenuator, the link circuit of N level electrically controlled attenuator is as the link circuit (N >=4) of N-1 level electrically controlled attenuator, form multistage electricity and adjust attenuator circuit, N level power splitter exports final signal.
As preferably, described multistage electricity adjusts attenuator circuit by arranging the different reference thresholds of N number of integrating circuit to the power detection of diverse location on link, under the condition that the power of the delivery outlet ensureing receiver is constant, the watt level change received along with antenna opening, described multistage electricity adjusts attenuator circuit successively to start to control, and in order to not affect receiver sensitivity, N level electrically controlled attenuator first starts to control, successively decrease successively and start to control, until first order electrically controlled attenuator finally starts to control.
As preferably, described integrating circuit is realized by operational amplifier, resistance (R) and an electric capacity (C), and adjusting resistance (R) and electric capacity (C) value can change the response time of integrating circuit, the anode of described operational amplifier arranges a reference thresholds (V+), negative terminal exports a magnitude of voltage (V-) by wave detector under different input powers, two (V+) and (V-) be worth respectively as described integrating circuit, the output voltage (Vontrol) of described integrating circuit is as the control voltage of electrically controlled attenuator, according to integrating circuit principle, when controlled electrically controlled attenuator starts to start to control, V+ and V-is equal, along with input signal (Pin) increases, the output voltage (Vontrol) of described integrating circuit slowly reduces, and power output (Po) remains unchanged, until exceed the dynamic range of electrically controlled attenuator.
As preferably, described multistage electricity is adjusted attenuator circuit to be analog voltage and is controlled, and realizes the dynamic range of gain dynamic range from zero to N level electrically controlled attenuator of whole link; Described first order electrically controlled attenuator, for the protection of described LNA, burns out in order to avoid high-power.
As preferably, described two-stage mixting circuit is for suppressing the mirror image of radio-frequency input signals; After the radiofrequency signal in broadband enters frequency mixer a, mirror image may drop in band, and adopt two-stage mixting circuit, radiofrequency signal is first mixed to a higher intermediate frequency by frequency mixer a, and then passes through the lower intermediate frequency of frequency mixer b mixing, realizes the expansion of bandwidth.
As preferably, one end of described power splitter is used for detection, and the other end is used for exporting radiofrequency signal to next link; Described detection tube changes different input power into different magnitude of voltage.
As preferably, the cascade of described multistage gain amplifier, realizes the high-gain of receiver.
The beneficial effects of the utility model are:
(1) the utility model can realize the high-gain dynamic range of receiver, and radio frequency bandwidth widened by multistage mixting circuit, and multistage gain amplifier ensures high-gain;
(2) the utility model makes whole receiver link adopt pure analog circuit, and without the need to digital interface, debugging is convenient, increases work efficiency;
(3) the utility model improves the reliability of product, and fitness is large, and antijamming capability is strong.
Accompanying drawing explanation
Fig. 1 is the high dynamically high-gain broadband receiver principle block diagram of the utility model;
Fig. 2 is the utility model electrically controlled attenuator theory diagram;
Fig. 3 is the utility model two-stage mixting circuit theory diagram.
Embodiment
Below in conjunction with accompanying drawing, detailed introduction is done to the utility model:
As shown in Figure 1, the utility model discloses a kind of high dynamically high-gain broadband receiver to comprise: radio-frequency (RF) front-end circuit, multistage electricity adjust attenuator circuit, two-stage mixting circuit and multistage gain amplifier composition, wherein, radio-frequency (RF) front-end circuit is made up of first order electrically controlled attenuator, LNA and first order gain amplifier, multistage electricity adjusts attenuator circuit to be made up of electrically controlled attenuator, integrating circuit, detection tube and power splitter, two-stage mixting circuit is made up of the frequency mixer in two broadbands and local oscillator, multistage gain amplifier is made up of multiple gain amplifier, it is characterized in that, the input of first order electrically controlled attenuator is connected to antenna opening, its output is connected to the input of LNA, the output of LNA is connected to the input of first order gain amplifier, the output of first order gain amplifier is connected to the input of the first power splitter, an output of the first power splitter is connected to the input of first detector, the output of first detector is connected to the input of first integral circuit, the output of first integral circuit is connected to the voltage controling end of first order electrically controlled attenuator, another output of first power splitter is connected to the input of filter a, the output of filter a is connected to the input of frequency mixer a, the output of frequency mixer a is connected to the input of filter b, the output of filter b is connected to the input of second level electrically controlled attenuator, the output of second level electrically controlled attenuator is connected to the input of second level gain amplifier, the output of second level gain amplifier is connected to the input of the second power splitter, an output of the second power splitter is connected to the input of second detector, the output of second detector is connected to the input of second integral circuit, the output of second integral circuit is connected to the voltage controling end of second level electrically controlled attenuator, another output of second power splitter is connected to the input of filter c, the output of filter c is connected to the input of frequency mixer b, the output of frequency mixer b is connected to the input of filter d, the output of filter d is connected to the input of third level electrically controlled attenuator, the output of third level electrically controlled attenuator is connected to the input of third level gain amplifier, the output of third level gain amplifier is connected to the input of the 3rd power splitter, an output of the 3rd power splitter is connected to the input of third detector, the output of third detector is connected to the input of third integral circuit, the output of third integral circuit is connected to the voltage controling end of third level electrically controlled attenuator, another output of 3rd power splitter is connected to the input of next stage electrically controlled attenuator, the link circuit of N level electrically controlled attenuator is as the link circuit (N >=4) of N-1 level electrically controlled attenuator, form multistage electricity and adjust attenuator circuit, N level power splitter exports final signal.
As shown in Figure 2, electrically controlled attenuator circuit adjusts attenuator circuit, power splitter, detection tube and integrating circuit to form primarily of electricity, and one end (Po1) of power splitter is used for detection, and one end (Po) is used as the input of next stage link; Different input power (Po1) is mainly changed corresponding different magnitudes of voltage (V) by detection tube; Integrating circuit is realized by operational amplifier, resistance (R) and an electric capacity (C), adjusting resistance (R) and electric capacity (C) value can change the response time (C is 4.7nF, R is 10K Ω) of integrating circuit.The anode of operational amplifier arranges a reference thresholds (V+), this threshold value is that the watt level of now Po1 is by post-detector magnitude of voltage, negative terminal exports a magnitude of voltage (V-) by wave detector under different input powers, two (V+) and (V-) be worth respectively as integrating circuit, the output voltage (Vontrol) of integrating circuit is as the control voltage of electrically controlled attenuator, when attenuator circuit starts to start to control, V+ and V-is equal, along with input signal (Pin) increases, the output voltage (Vontrol) of integrating circuit slowly reduces, the pad value of electrically controlled attenuator slowly increases, and power output (Po) remains unchanged, until exceed the dynamic range of electrically controlled attenuator.As long as the power of intermediate frequency delivery outlet (IF) is constant, and when receiver link maximum gain, calculate Po1, Po2, Po3 of every one-level ... the watt level of PoN, according to the watt level of every one-level by the reference thresholds of magnitude of voltage out after detection tube as every one-level integrating circuit.When antenna message is number very little time (namely during receiver link maximum gain), now multistage electrically controlled attenuator does not all start to control, when the signal of antenna opening increases gradually, in order to ensure the NF of whole link, first order electrically controlled attenuator and the second level electrically controlled attenuator of antenna opening all do not start to control, the third level is first started to control, after input signal increases to the dynamic range exceeding afterbody electrically controlled attenuator, start to start to control the second level, when input signal increases to the dynamic range exceeding two-stage electrically controlled attenuator below, start first order electrically controlled attenuator, now because input signal is very large, signal to noise ratio is high, first order electrically controlled attenuator starts to control can not affect receiver sensitivity, so first order electrically controlled attenuator both can protect LNA below after starting to control, also the dynamic range of an adjustment receiver is again played.Want good segmentation to start to control multistage electricity and adjust attenuator circuit, the power detection of every one-level is crucial, as long as set the reference thresholds (according to every one-level electrically controlled attenuator start to control power level to determine) of the power detection of every one-level, just can realize classification rapidly to start to control, the gain of rapid adjustment link, reach final maintenance IF power output constant, whole link is without the need to software control, nil circuit, pcb board placement-and-routing is easy.
As shown in Figure 3, two-stage mixting circuit forms primarily of the frequency mixer in two broadbands, after the radiofrequency signal in broadband enters frequency mixer a, mirror image may drop in band, and adopt two-stage mixting circuit, radiofrequency signal is first mixed to a higher intermediate frequency by frequency mixer a, and then pass through the lower intermediate frequency of frequency mixer b mixing, such two-stage mixing can suppress the mirror image of radio-frequency input signals, adds outside filter, widens radio frequency bandwidth.
The above, be only the good execution mode of the utility model, do not form the restriction to the utility model protection range.Any do within the utility model spirit amendment, equivalent to replace and improvement etc., all should be included within claims of the present utility model.
Claims (6)
1. one kind high dynamic high-gain broadband receiver, it is characterized in that: comprise radio-frequency (RF) front-end circuit, multistage electricity adjusts attenuator circuit, two-stage mixting circuit and multistage gain amplifier, wherein, described radio-frequency (RF) front-end circuit forms primarily of first order electrically controlled attenuator, LNA and first order gain amplifier, described multistage electricity adjusts attenuator circuit to be made up of electrically controlled attenuator, integrating circuit, detection tube and power splitter, described two-stage mixting circuit is primarily of the frequency mixer in two broadbands and local oscillator composition, described multistage gain amplifier is made up of multiple gain amplifier, the cascade of multistage gain amplifier, the input of first order electrically controlled attenuator is connected to antenna opening, its output is connected to the input of LNA, the output of LNA is connected to the input of first order gain amplifier, the output of first order gain amplifier is connected to the input of the first power splitter, an output of the first power splitter is connected to the input of first detector, the output of first detector is connected to the input of first integral circuit, the output of first integral circuit is connected to the voltage controling end of first order electrically controlled attenuator, another output of first power splitter is connected to the input of filter a, the output of filter a is connected to the input of frequency mixer a, the output of frequency mixer a is connected to the input of filter b, the output of filter b is connected to the input of second level electrically controlled attenuator, the output of second level electrically controlled attenuator is connected to the input of second level gain amplifier, the output of second level gain amplifier is connected to the input of the second power splitter, an output of the second power splitter is connected to the input of second detector, the output of second detector is connected to the input of second integral circuit, the output of second integral circuit is connected to the voltage controling end of second level electrically controlled attenuator, another output of second power splitter is connected to the input of filter c, the output of filter c is connected to the input of frequency mixer b, the output of frequency mixer b is connected to the input of filter d, the output of filter d is connected to the input of third level electrically controlled attenuator, the output of third level electrically controlled attenuator is connected to the input of third level gain amplifier, the output of third level gain amplifier is connected to the input of the 3rd power splitter, an output of the 3rd power splitter is connected to the input of third detector, the output of third detector is connected to the input of third integral circuit, the output of third integral circuit is connected to the voltage controling end of third level electrically controlled attenuator, another output of 3rd power splitter is connected to the input of next stage electrically controlled attenuator, the link circuit of N level electrically controlled attenuator is as the link circuit (N >=4) of N-1 level electrically controlled attenuator, form multistage electricity and adjust attenuator circuit, N level power splitter exports final signal.
2. the dynamic high-gain broadband receiver of height according to claim 1, it is characterized in that: described multistage electricity adjusts attenuator circuit by arranging the different reference thresholds of N number of integrating circuit to the power detection of diverse location on link, under the condition that the power of the delivery outlet ensureing receiver is constant, the watt level change received along with antenna opening, described multistage electricity adjusts attenuator circuit successively to start to control, N level electrically controlled attenuator first starts to control, successively decrease successively and start to control, until first order electrically controlled attenuator finally starts to control.
3. the dynamic high-gain broadband receiver of height according to claim 1, is characterized in that: described integrating circuit is realized by an operational amplifier, resistance R and electric capacity C, and adjusting resistance R and electric capacity C value change the response time of integrating circuit; The anode of described operational amplifier arranges a reference thresholds V+, negative terminal exports a magnitude of voltage V-by wave detector under different input powers, two V+ and V-be worth respectively as described integrating circuit, the output voltage of described integrating circuit is as the control voltage of electrically controlled attenuator, when controlled electrically controlled attenuator starts to start to control, V+ and V-is equal, along with input signal increases, the output voltage of described integrating circuit slowly reduces, and power output remains unchanged, until exceed the dynamic range of electrically controlled attenuator.
4. the dynamic high-gain broadband receiver of height according to claim 1, is characterized in that: described multistage electricity is adjusted attenuator circuit to be analog voltage and controlled, and realizes the dynamic range of gain dynamic range from zero to N level electrically controlled attenuator of whole link; Described first order electrically controlled attenuator is for the protection of described LNA.
5. the dynamic high-gain broadband receiver of height according to claim 1, is characterized in that: described two-stage mixting circuit is for suppressing the mirror image of radio-frequency input signals; After the radiofrequency signal in broadband enters frequency mixer a, mirror image may drop in band, and adopt two-stage mixting circuit, radiofrequency signal is first mixed to a higher intermediate frequency by frequency mixer a, and then passes through the lower intermediate frequency of frequency mixer b mixing, realizes the expansion of bandwidth.
6. the dynamic high-gain broadband receiver of height according to claim 1, is characterized in that: one end of described power splitter is used for detection, and the other end is used for exporting radiofrequency signal to next link; Described detection tube changes different input power into different magnitude of voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420369394.3U CN204046583U (en) | 2014-07-04 | 2014-07-04 | High dynamically high-gain broadband receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420369394.3U CN204046583U (en) | 2014-07-04 | 2014-07-04 | High dynamically high-gain broadband receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204046583U true CN204046583U (en) | 2014-12-24 |
Family
ID=52247204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420369394.3U Withdrawn - After Issue CN204046583U (en) | 2014-07-04 | 2014-07-04 | High dynamically high-gain broadband receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204046583U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092471A (en) * | 2014-07-04 | 2014-10-08 | 三维通信股份有限公司 | High-dynamic high-gain broadband receiver |
| CN106209273A (en) * | 2016-07-25 | 2016-12-07 | 波达通信设备（广州）有限公司 | The detection method of receiver incoming level, Apparatus and system |
| CN108055424A (en) * | 2018-01-23 | 2018-05-18 | 扬州海科电子科技有限公司 | 2~18GHz Larger Dynamic detection Log Video Amplifiers |
| CN108923796A (en) * | 2018-06-08 | 2018-11-30 | 中国电子科技集团公司第四十研究所 | A kind of pre- fixed ampllitude dynamic regulation circuit in broadband and adjusting method |
| CN110346756A (en) * | 2019-07-10 | 2019-10-18 | 四川中电昆辰科技有限公司 | A kind of signal envelope detection device and method and its arrival time modification method |
| CN111049487A (en) * | 2019-12-12 | 2020-04-21 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Automatic gain control circuit and control method |
| CN112543032A (en) * | 2019-09-23 | 2021-03-23 | 海能达通信股份有限公司 | Receiver and processing method |
-
2014
- 2014-07-04 CN CN201420369394.3U patent/CN204046583U/en not_active Withdrawn - After Issue
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092471A (en) * | 2014-07-04 | 2014-10-08 | 三维通信股份有限公司 | High-dynamic high-gain broadband receiver |
| CN106209273A (en) * | 2016-07-25 | 2016-12-07 | 波达通信设备（广州）有限公司 | The detection method of receiver incoming level, Apparatus and system |
| CN108055424A (en) * | 2018-01-23 | 2018-05-18 | 扬州海科电子科技有限公司 | 2~18GHz Larger Dynamic detection Log Video Amplifiers |
| CN108055424B (en) * | 2018-01-23 | 2020-11-13 | 扬州海科电子科技有限公司 | 2-18GHz large dynamic detection logarithmic video amplifier |
| CN108923796A (en) * | 2018-06-08 | 2018-11-30 | 中国电子科技集团公司第四十研究所 | A kind of pre- fixed ampllitude dynamic regulation circuit in broadband and adjusting method |
| CN110346756A (en) * | 2019-07-10 | 2019-10-18 | 四川中电昆辰科技有限公司 | A kind of signal envelope detection device and method and its arrival time modification method |
| CN112543032A (en) * | 2019-09-23 | 2021-03-23 | 海能达通信股份有限公司 | Receiver and processing method |
| CN112543032B (en) * | 2019-09-23 | 2022-06-24 | 海能达通信股份有限公司 | Receiver and processing method |
| CN111049487A (en) * | 2019-12-12 | 2020-04-21 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Automatic gain control circuit and control method |
| CN111049487B (en) * | 2019-12-12 | 2023-12-29 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Automatic gain control circuit and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104092471B (en) | A kind of high dynamically high-gain broadband receiver | |
| CN204046583U (en) | High dynamically high-gain broadband receiver | |
| CN103580610B (en) | Multimode power amplifier and corresponding mobile communication terminal | |
| CN102652392A (en) | Semiconductor integrated circuit and tuner system provided with same | |
| CN102710224B (en) | Multimode power amplifier and corresponding mobile communication equipment | |
| CN203057121U (en) | AGC circuit quick control system based on linear receiver | |
| CN207926572U (en) | A kind of high dynamic broadband range receiver | |
| CN109951244B (en) | Power measurement and radio frequency receiving gain control method applied to channel simulator | |
| CN203522662U (en) | Mixed-control device for gain of short-wave receiver | |
| CN201690414U (en) | Transceiving channel device for KA frequency converter | |
| US9484864B2 (en) | Doherty amplifier | |
| CN201956980U (en) | Automatic gain adjusting circuit in high dynamic range | |
| US7505743B2 (en) | Dual band transmitter having filtering coupler | |
| CN208112621U (en) | A kind of sample circuit applied to radar communications system | |
| CN202586944U (en) | Short wave preselector | |
| CN104702307A (en) | Micro transceiver assembly | |
| CN205139630U (en) | Broadband automatic control's letter is made an uproar rate of flow and is installed mutually | |
| KR100737539B1 (en) | A power amplifier matching circuit of mobile communication terminal | |
| CN104702231B (en) | AGC and ALC high-gain active circuit components with synchronization control function | |
| Tran et al. | Design of a front-end for satellite receiver | |
| Han et al. | Design and implementation of AGC algorithm circuit for high PAPR signal | |
| CN203747757U (en) | Front end amplification assembly of radio frequency receiver | |
| CN105929883B (en) | emission current control method and device | |
| CN215641523U (en) | Novel millimeter wave large dynamic high linear logarithm detector | |
| CN216599558U (en) | AGC temperature compensation circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141224 Effective date of abandoning: 20160420 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |