CN101127932A - An integrated talk back module and talk back system based on this module - Google Patents
An integrated talk back module and talk back system based on this module Download PDFInfo
- Publication number
- CN101127932A CN101127932A CNA2007100771786A CN200710077178A CN101127932A CN 101127932 A CN101127932 A CN 101127932A CN A2007100771786 A CNA2007100771786 A CN A2007100771786A CN 200710077178 A CN200710077178 A CN 200710077178A CN 101127932 A CN101127932 A CN 101127932A
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- signaling
- integrated
- radio
- 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.)
- Granted
Links
Images
Landscapes
- Transceivers (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
The utility model discloses an integrated talkback module and a module-based talkback system. The integrated talkback module comprises a radio frequency receiving part, a radio frequency emitting part and a baseband signal processing part. The radio frequency receiving part is used to receive the radio frequency signal; demodulate the voice signal and the signaling signal and output the voice signal and the signaling signal to the baseband signal processing part. The baseband signal processing part is used to process the voice signal and the signaling signal received from the radio frequency receiving part and input the processed voice signal and signaling signal to the radio frequency emitting part. The radio frequency emitting part is used to modulate the voice signal and the signaling signal received from the baseband signal processing part on the radio frequency carrier for outputting. The radio frequency receiving part, the radio frequency emitting part and the baseband signal processing part are integrated in a single chip via the CMOS technology. Because all the circuits are integrated in a single chip, the device of the utility model has the advantages of simple circuit, low cost, improved technical parameter and strong stability.
Description
Technical field
The present invention relates to field of wireless communication, relate in particular to a kind of integrated intercommunication module and based on the intercom system of this module.
Background technology
Existing intercom is divided into professional machine and civil aircraft (public's intercom) two big classes.The specialty machine is meant the machine of transmitting power greater than 4W, the main satisfied application far away to speech range, as: public security, security personnel and professional mountaineer etc.; Civil aircraft is meant that transmitting power is not more than the machine of 0.5W, and is main satisfied with the not tight application of speech range requirement, as: restaurant, hotel, exhibition and out on tours etc.; On the present intercom market, no matter be professional machine or civil aircraft, dominant technology all is based on pll frequency synthesizer and receives the superhet analog signal processing technology of double conversion; Its advantage is that technology maturation, entry threshold are lower, thereby is widely used.But along with intercom is little to volume, cost is low, function is strong, reliability is high, more commercial trend development, this traditional analog signal processing technology also shows increasing problem., discrete component complicated as the differentiation of: circuit structure reaches thousands of of hundreds of, serious restriction the research and development innovation of intercom product; Its production debugging is complicated in addition, poor, the cost height of consistency of stability and technical parameter.
Summary of the invention
In view of this, the invention provides a kind of integrated intercommunication module and based on the intercom system of this module, volume is little, cost is low, good reliability.
For achieving the above object, integrated intercommunication module of the present invention adopts following technical scheme:
A kind of integrated intercommunication module comprises radio frequency receiving unit, radio-frequency transmissions part and base band signal process part; Described radio frequency receiving unit is used for received RF signal and demodulation output voice signal and signaling-information to the base band signal process part; Described base band signal process partly is used for the voice signal and the signaling-information of described demodulation output are carried out exporting after the Base-Band Processing, also is used for carrying out being input to described radio-frequency transmissions part after the Base-Band Processing sending voice signal and signaling-information; Described radio-frequency transmissions partly is used for exporting being modulated on the radio-frequency carrier through the transmission voice signal after the Base-Band Processing and signaling-information; Described radio frequency receiving unit, radio-frequency transmissions part and base band signal process part are integrated on the chip piece by CMOS technology.
Described integrated intercommunication module also comprises the digital interface control section, and described digital interface control section is used to control the operating state and the parameter of radio frequency receiving unit, radio-frequency transmissions part and base band signal process part.
Described radio frequency receiving unit is the receiving circuit of nearly zero low-if version.
The receiving circuit of described nearly zero low-if version comprises low noise amplifier, orthogonal mixer, two-way intermediate-freuqncy signal processing unit, digital FM demodulator; Described low noise amplifier is used for the radiofrequency signal that receives is carried out the low noise amplification and divided two-way to output to described orthogonal mixer; Described orthogonal mixer is used for the mixing conversion and goes out two-way quadrature intermediate-freuqncy signal and output to two-way intermediate-freuqncy signal processing unit respectively; Described two-way intermediate-freuqncy signal processing unit is handled the intermediate-freuqncy signal of input respectively, the output digital intermediate frequency signal; Described digital FM demodulator is used for the two-way digital intermediate frequency signal of input is carried out demodulation, exports voice signal and signaling-information respectively.
Described radio-frequency transmissions partly is the radiating circuit of direct phase-locked loop frequency comprehensive form.
The radiating circuit of described direct phase-locked loop frequency comprehensive form comprises warble rate adjuster, phase-locked loop frequency integrator and power amplifier, and described warble rate adjuster is used for the voice signal of input and signaling-information are carried out the warble rate adjusting; Described phase-locked loop frequency integrator is used to produce the modulated RF carrier signal; Described power amplifier is used for described modulated RF carrier signal is carried out exporting after the power amplification.
Described base band signal process partly comprises the reception Audio Processing Unit, sends Audio Processing Unit, signaling-information processing unit; Described signaling-information processing unit is used for that the signaling-information that receives or send is carried out filter shape to be handled; Described reception Audio Processing Unit is used for the voice signal of described radio frequency receiving unit output is carried out exporting after digital-to-analogue conversion and the filter amplifying processing; The transmission voice signal that described transmission Audio Processing Unit is used for importing to external world carries out outputing to the radio-frequency transmissions part after analog-to-digital conversion and the Filtering Processing.
The invention also discloses a kind of integrated intercom system that contains above arbitrary described integrated intercommunication module.
Described integrated intercom system also comprises central processing portion, and described central processing portion links to each other with the digital interface control section, and described central processing portion also is used for receiving or sending signaling-information.
Integrated intercommunication module of the present invention adopts Digital Signal Processing to realize that all circuit of intercommunication transmitting-receiving path are integrated in a slice chip, only needs few peripheral components can finish the radio-frequency receiving-transmitting function, and circuit is simple, and is with low cost; Not only solve the problem that the differentiation of traditional analog intercom technology circuit structure is complicated, discrete component is many, production cost is high, and greatly improved the technical parameter and the stability of product.
Description of drawings
Fig. 1 is the integrated intercommunication modular structure block diagram of the specific embodiment of the invention;
Fig. 2 is an integrated intercommunication module particular circuit configurations block diagram shown in Figure 1;
Fig. 3 is the intercom system block diagram of the specific embodiment of the invention.
Embodiment
The invention will be further described in conjunction with embodiment for the contrast accompanying drawing below.
As illustrated in fig. 1 and 2, the integrated intercommunication module of the specific embodiment of the invention comprises radio frequency receiving unit 1, radio-frequency transmissions part 2, base band signal process part 3 and digital interface control section 4.Radio frequency receiving unit 1 comprises low noise amplifier 11, frequency mixer 12, low pass filter 13, programmable amplifier 14, first analog to digital converter 15, digital processing element 16, digital FM demodulator 17.Radio-frequency transmissions part 2 comprises warble rate adjuster 21, phase-locked loop frequency integrator 22 and power amplifier 23.Base band signal process part 3 comprises filter shape device 331, first voice filter 311, digital to analog converter 312, speech amplifier 313, second analog to digital converter 321, second digital filter 322, second voice filter 323.Reception path when respectively integrated intercommunication module being carried out radio-frequency receiving-transmitting below and emission path are done a description:
Radio frequency receives path: radio frequency receiving unit 1 adopts the receiving circuit form of nearly zero Low Medium Frequency structure.The input radio frequency signal at first arrives low noise amplifier 11, and low noise amplifier 11 is a differential low noise amplifier, is divided into two-way after amplifying through the low noise difference and is sent to orthogonal mixer 12, can directly radiofrequency signal be converted to nearly zero Low Medium Frequency.For traditional secondary superhet converter technique, frequency mixer is typically carries out the upper sideband mixing, local oscillation signal exceeds an intermediate frequency than rf frequency, and the picture frequency that this kind mode makes frequency be higher than rf frequency twice intermediate frequency also is converted to intermediate frequency, thereby has brought the picture frequency interference.And the nearly zero Low Medium Frequency structure that present embodiment adopts not only can realize high integration, and can effectively reduce the outer discrete component of sheet, avoids using external radio frequency image-reject filter, reduces overall cost.
The intermediate-freuqncy signal of orthogonal mixer 12 output two-way quadratures, promptly I road signal and Q road signal are sent into two-way intermediate-freuqncy signal processing unit respectively.The intermediate-freuqncy signal processing unit comprises low pass filter 13, programmable amplifier 14, first digital to analog converter 15, digital signal processing unit 16.
I road signal and Q road signal at first enter the low pass filter 13 on the path separately, and this low pass filter 13 is three rank Chebyshev filters, and major function is the adjacentchannel selectivity of increase system, and improve the block resistance of system.Filtered intermediate-freuqncy signal is amplified by programmable amplifier 14, and the gain of programmable amplifier 14 is set by its inner register or digital AGC (Automatic GainControl, automatic gain control) circuit.Afterwards, intermediate-freuqncy signal is input to first analog to digital converter 15 and is converted to digital intermediate frequency signal.Digital intermediate frequency signal is input to digital processing element 16 again and carries out digital processing, wherein digital processing element 16 comprises first digital filter 161, sampler 162, finite impulse response filter 163 and digital controlled oscillator 164, digital controlled oscillator 164 is used for providing the numerical control local oscillation signal in when sampling to sampler 162, first digital filter 161, sampler 162, finite impulse response (FIR) filter 163 carry out filtering, sampling to digital signal successively, filter out all bands by finite impulse response filter 163 again and disturb outward.Arrive digital FM demodulator 17 at last through the two-way quadrature digital intermediate frequency signal after the digital processing and demodulate signaling-information and voice signal respectively.
Radio-frequency transmissions path: after the transmission voice signal of extraneous input and signaling-information are handled through base band signal process part 3, the warble rate adjuster 21 that at first arrives in the radio-frequency transmissions part 2 carries out the warble rate adjusting, be admitted to phase-locked loop frequency integrator 22 then, finish digital direct frequency modulation modulation, produce stable modulated RF carrier signal, the modulated RF carrier signal is gone out by power amplifier 23 amplifying emission.Whole radio-frequency transmissions part 2 is the radiating circuit of direct phase-locked loop frequency comprehensive form.
Base band signal process: base band signal process part 3 mainly is divided into three unit: receive Audio Processing Unit, send Audio Processing Unit, signaling-information processing unit.Wherein the signaling-information processing unit is a filter shape device 331, is used for that the signaling-information that receives (receiving from digital FM demodulator 17) or transmission (by external world's input, will deliver to warble rate adjuster 21) is carried out filter shape and handles.Receive Audio Processing Unit and comprise first voice filter 311, digital to analog converter 312 and speech amplifier 313.Carry out successively exporting after filtering, digital-to-analogue conversion and the amplification by first voice filter 311, digital to analog converter 312 and speech amplifier 313 from the voice signal of digital FM demodulator 17 outputs.Send Audio Processing Unit and comprise second analog to digital converter 321, second digital filter 322, second voice filter 323.By the transmission voice signal of external world input at first by second analog to digital converter 321 be converted to digital signal, again by second digital filter, 322 filtering out of band signals, at last by outputing to radio-frequency transmissions part 2 after 323 filtering of second voice filter.
Second analog to digital converter 321 adopts high performance Delta-Sigma analog to digital converter, and sample frequency can be consistent with the clock frequency of whole integrated intercommunication module, and such selection can make front end not need frequency overlapped-resistable filter.Voltage controlled oscillator (not shown) in the phase-locked loop frequency integrator 22 is operated in 1.4GHz to 2GHz, produces drageffect to avoid power amplifier 23.Voltage controlled oscillator is through the needed frequency range of frequency division output intercommunication module.Simultaneously, phase-locked loop frequency integrator 22 also offers frequency mixer 12 simultaneously with local oscillation signal, also needs to adopt in addition other devices to obtain local oscillation signal to avoid frequency mixer.Phase-locked loop frequency integrator 22 adopts high performance fractional phase lock loop frequency synthesizer, thereby has realized high-performance, the low-cost design that low phase noise, the phase-locked time that is exceedingly fast and any frequency are adjustable.
Digital interface control section 4: above-mentioned radio frequency receiving unit 1, radio-frequency transmissions part 2 and base band signal process part 3 all can be by 4 controls of digital interface control section, operating state and parameter to above-mentioned three parts are adjusted, and comprise each parameters such as loop characteristics of receiving gain, the gain of emission frequency modulation, frequency, radio-frequency receiving-transmitting control and phase-locked loop frequency integrator.Digital interface control section 4 adopts three-way (I
2C) bus realizes data interaction and control with central processing unit as two-way control bus.
The power management of integrated intercommunication module is by built-in low-dropout linear voltage-regulating circuit of module and control circuit, for each function element in the module provides the galvanic current source.
Fig. 3 shows a kind of intercom system that contains above-mentioned integrated intercommunication module, and described intercom system also comprises central processing portion 5 except that comprising integrated intercommunication module.Central processing portion 5 mainly by with finish mutual with integrated intercommunication module being connected of the digital interface control section 4 of integrated intercommunication module.During reception, radiofrequency signal is input to integrated intercommunication module through duplexer and filter successively, integrated intercommunication module is carried out aforementioned processing to radiofrequency signal, the output voice signal is to loud speaker (loudspeaker), and signaling-information outputed to central processing portion 5, central processing portion 5 is controlled the output state of voice signal according to signaling-information: the preset value in signaling-information and the central processing portion 5 compares, if it is identical with preset value, central processing portion 5 controls are opened loud speaker and are discharged voice signal, if it is different, then mute speaker does not discharge voice signal.During emission, send voice and convert audio electrical signal to by receiver (microphone), after producing specified radio-frequency power through power amplifier behind the integrated intercommunication resume module output frequency-shift keying modulation signal, launch by antenna through duplexer, central processing portion 5 produces signaling-information simultaneously and sends into integrated intercommunication module, by launching together with voice signal after the integrated intercommunication resume module.
This intercom system also comprises keyboard input unit and display unit, to make things convenient for the use of this intercom system.
Can infer, integrated intercommunication module of the present invention can be applied to existing calculation element fully, as in the products such as removable computer, mobile phone increase intercommunication function for these products, in such application, because these calculation elements self all contain CPU (CPU) and keyboard, display unit usually, therefore, the central processing portion 5 in the above-mentioned intercom system, keyboard input unit and display unit can be the functional unit that calculation element self contains fully.
Integrated intercommunication module of the present invention and use the intercom system of this module has solved traditional complicated, problems such as discrete component is many, poor stability of analog signal processing technology circuit structure differentiation well.Simplify product design greatly and reduced cost, improved the technology content and the intelligentized design of product.
This module is embedded in the products such as mobile phone, can realizes having mobile phone or other products of intercommunication function.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. an integrated intercommunication module is characterized in that, described integrated intercommunication module comprises radio frequency receiving unit (1), radio-frequency transmissions part (2) and base band signal process part (3); Described radio frequency receiving unit (1) is used for received RF signal and demodulation output voice signal and signaling-information to base band signal process part (3); Described base band signal process part (3) is used for the voice signal and the signaling-information of described demodulation output are carried out exporting after the Base-Band Processing, also is used for carrying out outputing to described radio-frequency transmissions part (2) after the Base-Band Processing sending voice signal and signaling-information; Described radio-frequency transmissions part (2) is used for exporting being modulated on the radio-frequency carrier through the transmission voice signal after the Base-Band Processing and signaling-information; Described radio frequency receiving unit (1), radio-frequency transmissions part (2) and base band signal process part (3) are integrated on the chip piece by CMOS technology.
2. integrated intercommunication module as claimed in claim 1, it is characterized in that, also comprise digital interface control section (4), described digital interface control section (4) is used to control the operating state and the parameter of radio frequency receiving unit (1), radio-frequency transmissions part (2) and base band signal process part (3).
3. integrated intercommunication module as claimed in claim 2 is characterized in that, described radio frequency receiving unit (1) is the receiving circuit of nearly zero low-if version.
4. integrated intercommunication module as claimed in claim 3 is characterized in that, the receiving circuit of described nearly zero low-if version comprises low noise amplifier (11), orthogonal mixer (12), two-way intermediate-freuqncy signal processing unit, digital FM demodulator (17); Described low noise amplifier (11) is used for the radiofrequency signal that receives is carried out the low noise amplification and divided two-way to output to described orthogonal mixer (12); Described orthogonal mixer (12) is used for the mixing conversion and goes out two-way quadrature intermediate-freuqncy signal and output to two-way intermediate-freuqncy signal processing unit respectively; Described two-way intermediate-freuqncy signal processing unit is handled the intermediate-freuqncy signal of input respectively, the output digital intermediate frequency signal; Described digital FM demodulator (17) is used for the two-way digital intermediate frequency signal of input is carried out demodulation, exports voice signal and signaling-information respectively.
5. integrated intercommunication module as claimed in claim 2 is characterized in that, described radio-frequency transmissions part (2) is the radiating circuit of direct phase-locked loop frequency comprehensive form.
6. integrated intercommunication module as claimed in claim 5, it is characterized in that, the radiating circuit of described direct phase-locked loop frequency comprehensive form comprises warble rate adjuster (21), phase-locked loop frequency integrator (22) and power amplifier (23), and described warble rate adjuster (21) is used for the voice signal of input and signaling-information are carried out the warble rate adjusting; Described phase-locked loop frequency integrator (22) is used to produce the rf modulations carrier signal; Described power amplifier (23) is used for described rf modulations carrier signal is carried out exporting after the power amplification.
7. integrated intercommunication module as claimed in claim 2 is characterized in that, described base band signal process part (3) comprises the reception Audio Processing Unit, sends Audio Processing Unit, signaling-information processing unit; Described signaling-information processing unit is used for that the signaling-information that receives or send is carried out filter shape to be handled; Described reception Audio Processing Unit is used for the voice signal of described radio frequency receiving unit (1) output is carried out exporting after digital-to-analogue conversion and the filter amplifying processing; The transmission voice signal that described transmission Audio Processing Unit is used for importing to external world carries out outputing to radio-frequency transmissions part (2) after analog-to-digital conversion and the Filtering Processing.
8. integrated intercom system that contains just like the arbitrary described integrated intercommunication module of claim 1 to 7.
9. integrated intercom system as claimed in claim 8 is characterized in that, also comprises central processing portion (5), and described central processing portion (5) links to each other with digital interface control section (4), and described central processing portion (5) also is used for receiving or sending signaling-information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100771786A CN100562143C (en) | 2007-09-17 | 2007-09-17 | A kind of integrated intercommunication module reaches the intercom system based on this module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100771786A CN100562143C (en) | 2007-09-17 | 2007-09-17 | A kind of integrated intercommunication module reaches the intercom system based on this module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101127932A true CN101127932A (en) | 2008-02-20 |
| CN100562143C CN100562143C (en) | 2009-11-18 |
Family
ID=39095825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100771786A Active CN100562143C (en) | 2007-09-17 | 2007-09-17 | A kind of integrated intercommunication module reaches the intercom system based on this module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100562143C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888571A (en) * | 2010-07-13 | 2010-11-17 | 深圳市力同亚太科技有限公司 | Integrated talkback chip and integrated talkback system comprising same |
| CN101998289A (en) * | 2009-08-19 | 2011-03-30 | 中兴通讯股份有限公司 | Method and device for controlling voice playing device in call process of cluster terminals |
| CN102572878A (en) * | 2011-12-26 | 2012-07-11 | 南京瀚之显电子科技有限公司 | Zigbee protocol analyzing device |
| CN102572616A (en) * | 2012-03-21 | 2012-07-11 | 天津七一二通信广播有限公司 | Digital interphone with digital and analogue hybrid receiving function |
| CN103227659A (en) * | 2013-03-04 | 2013-07-31 | 福建省万华电子科技有限公司 | Digital DPMR (digital private mobile radio) interphone based on single-point modulation of digital frequency synthesizer |
| CN101309464B (en) * | 2008-07-15 | 2013-11-06 | 中兴通讯股份有限公司 | Voice apparatus controlling method for clustered terminal and clustered terminal |
| CN104105013A (en) * | 2014-07-10 | 2014-10-15 | 四川兴事发能源科技有限公司 | Multi-party real-time intercom system and data flow thereof |
| CN104254042A (en) * | 2014-07-30 | 2014-12-31 | 宁波音王电声股份有限公司 | Wireless microphone |
| CN106972869A (en) * | 2017-02-08 | 2017-07-21 | 泉州力同科技有限公司 | A kind of radio frequency chip circuit and intercom |
| CN109861704A (en) * | 2018-11-08 | 2019-06-07 | 同方电子科技有限公司 | Voice signal AGC control system and method in a kind of Digital Receiver |
-
2007
- 2007-09-17 CN CNB2007100771786A patent/CN100562143C/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101309464B (en) * | 2008-07-15 | 2013-11-06 | 中兴通讯股份有限公司 | Voice apparatus controlling method for clustered terminal and clustered terminal |
| CN101998289A (en) * | 2009-08-19 | 2011-03-30 | 中兴通讯股份有限公司 | Method and device for controlling voice playing device in call process of cluster terminals |
| CN101888571A (en) * | 2010-07-13 | 2010-11-17 | 深圳市力同亚太科技有限公司 | Integrated talkback chip and integrated talkback system comprising same |
| CN102572878A (en) * | 2011-12-26 | 2012-07-11 | 南京瀚之显电子科技有限公司 | Zigbee protocol analyzing device |
| CN102572616B (en) * | 2012-03-21 | 2014-07-09 | 天津七一二通信广播有限公司 | Digital interphone with digital and analogue hybrid receiving function |
| CN102572616A (en) * | 2012-03-21 | 2012-07-11 | 天津七一二通信广播有限公司 | Digital interphone with digital and analogue hybrid receiving function |
| CN103227659A (en) * | 2013-03-04 | 2013-07-31 | 福建省万华电子科技有限公司 | Digital DPMR (digital private mobile radio) interphone based on single-point modulation of digital frequency synthesizer |
| CN104105013A (en) * | 2014-07-10 | 2014-10-15 | 四川兴事发能源科技有限公司 | Multi-party real-time intercom system and data flow thereof |
| CN104254042A (en) * | 2014-07-30 | 2014-12-31 | 宁波音王电声股份有限公司 | Wireless microphone |
| CN104254042B (en) * | 2014-07-30 | 2017-05-24 | 宁波音王电声股份有限公司 | Wireless microphone |
| CN106972869A (en) * | 2017-02-08 | 2017-07-21 | 泉州力同科技有限公司 | A kind of radio frequency chip circuit and intercom |
| CN109861704A (en) * | 2018-11-08 | 2019-06-07 | 同方电子科技有限公司 | Voice signal AGC control system and method in a kind of Digital Receiver |
| CN109861704B (en) * | 2018-11-08 | 2021-04-06 | 同方电子科技有限公司 | Voice signal AGC control method in digital receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100562143C (en) | 2009-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100562143C (en) | A kind of integrated intercommunication module reaches the intercom system based on this module | |
| CN101888571A (en) | Integrated talkback chip and integrated talkback system comprising same | |
| US8041386B2 (en) | Configurable multiple mode RFIC | |
| CN107819489A (en) | A kind of ultra wide band high bandwidth radio-frequency receiving-transmitting two-way integral integration module | |
| CN204794979U (en) | Wireless receiver circuit | |
| CN105375945A (en) | RF front-end architecture for machine-to-machine applications | |
| US20090117938A1 (en) | Ic for a high frequency communication device with minimal off chip components | |
| CN103166670B (en) | Radio frequency transceiver of Beidou satellite navigation and positioning system | |
| CN203608193U (en) | Hand-held short-wave radio station based on radio frequency digitalization | |
| CN101917206B (en) | Integrated talkback chip and integrated talkback system with dual tone multiple frequency coding and decoding function | |
| CN201878199U (en) | Interphone with functions of mobile phone | |
| CN103762979B (en) | Broadband frequency source for LTE channel simulator | |
| CN210958360U (en) | Signal processing circuit and antenna device | |
| CN106533472B (en) | Ultratvide frequency band general purpose receiver | |
| CN202818280U (en) | Mobile terminal and radio frequency front end thereof with radio frequency digital-to-analogue conversion type linear transmitter | |
| US20100097966A1 (en) | Concurrent dual-band receiver and communication device having same | |
| CN208128240U (en) | High performance mini multi-standard digital walkie-talkie module | |
| CN203193625U (en) | Miniaturized zero intermediate frequency transceiver | |
| CN210157213U (en) | Satellite modem | |
| CN2768320Y (en) | Multifunctional mobile phone | |
| CN103124247B (en) | A kind of signal demodulating system, receptor and demodulation filtering method | |
| CN101938292B (en) | Multimode multi-standard mobile phone radio frequency transceiver | |
| CN210075289U (en) | Wireless microphone system control platform based on Web server | |
| CN202334496U (en) | Optical density unit (ODU) frequency source | |
| CN203233411U (en) | Radio frequency transceiver for Beidou satellite navigation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160422 Address after: Fengze District of Quanzhou City, Fujian province 362000 Quanzhou Software Park Development Zone started R & D 6 floor Patentee after: Quanzhou Power Technology Co. Ltd. Address before: 518040 Guangdong city in Shenzhen Province, Futian District Tian An digital Times Building A room 1201~1202 Patentee before: Shenzhen Litong Yatai Technology Co., Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20080220 Assignee: With the core force (Hongkong) Co. Ltd. Assignor: Quanzhou Power Technology Co. Ltd. Contract record no.: 2016990000469 Denomination of invention: An integrated talk back module and talk back system based on this module Granted publication date: 20091118 License type: Common License Record date: 20161111 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |