CN104967492A - Detection circuit and terminal - Google Patents
Detection circuit and terminal Download PDFInfo
- Publication number
- CN104967492A CN104967492A CN201510292121.2A CN201510292121A CN104967492A CN 104967492 A CN104967492 A CN 104967492A CN 201510292121 A CN201510292121 A CN 201510292121A CN 104967492 A CN104967492 A CN 104967492A
- Authority
- CN
- China
- Prior art keywords
- module
- receiving
- frequency
- switch element
- 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
Landscapes
- Transceivers (AREA)
Abstract
The invention discloses a detection circuit and a terminal. The detection circuit comprises a radio frequency transmitting-receiving module, a coupling module and a detecting module. The coupling module is connected with the radio frequency transmitting-receiving module and the detecting module. The coupling module comprises a coupling resistor and a switching unit. One end of the coupling resistor is connected with the radio frequency transmitting-receiving module while the other end is connected with the input end of the switching unit. The output end of the switching unit is connected with the detecting module. When the received signal strength of the radio frequency transmitting-receiving module is detected, the input end and the output end of the switching unit are connected. The coupling module makes the radio frequency signals received by the radio frequency transmitting-receiving module coupled to the detecting module so that the detecting module can detect the received signal strength of the radio frequency transmitting-receiving module. After the received signal strength of the radio frequency transmitting-receiving module is detected, the input end and the output end of the switching unit are disconnected. The above-mentioned scheme can make radio frequency signal attenuation caused by the coupling module alleviated. The detection precision and the receiving sensitivity can be further improved.
Description
Technical field
The application relates to the communications field, particularly a kind of testing circuit and terminal.
Background technology
In radio circuit or broadband time slot detect, generally include testing circuit, as shown in Figure 1, testing circuit comprises radio-frequency (RF) receiving and transmission module 110, coupling module 120 and detection module 130.Coupling module 120 connects radio-frequency (RF) receiving and transmission module 110 and detection module 130 respectively.Radio-frequency (RF) receiving and transmission module 110 is for transmitting radio frequency signal; Coupling module 120 is coupled to detection module 130 for radiofrequency signal radio-frequency (RF) receiving and transmission module 110 received; Detection module 130 is for detecting the received signal strength (Received Signal Strength Indication, RSSI) of radio-frequency (RF) receiving and transmission module 120.
Wherein, coupling module 120 is made up of coupling capacitance usually.But, from the degree of coupling and the signal attenuation curve chart of coupling module 120 as shown in Figure 2, when adopting this coupled modes, the degree of coupling of coupling module 120 can change along with the change of frequency, degree of coupling fluctuation range is more than 30dB, thus the RSSI causing detection module 130 to arrive in different frequency detecting is different, measure error is larger; Further, coupling module 120 also causes larger signal attenuation, reduces receiving sensitivity.
Summary of the invention
The application provides a kind of testing circuit and terminal, can reduce signal attenuation, improves accuracy of detection and receiving sensitivity.
For solving the problem, the technical scheme that the application adopts is: provide a kind of testing circuit, comprise radio-frequency (RF) receiving and transmission module, coupling module and detection module, described coupling module connects described radio-frequency (RF) receiving and transmission module and described detection module, wherein, described coupling module comprises coupling resistance and switch element; One end of described coupling resistance connects described radio-frequency (RF) receiving and transmission module, and the other end of described coupling resistance connects the input of described switch element, and the output of described switch element connects described detection module; Described radio-frequency (RF) receiving and transmission module is used for transmitting radio frequency signal; Described coupling module is used for the radiofrequency signal that described radio-frequency (RF) receiving and transmission module receives to be coupled to described detection module; Described detection module is for detecting the received signal strength of described radio-frequency (RF) receiving and transmission module; When detecting the received signal strength of described radio-frequency (RF) receiving and transmission module, the input of described switch element and the output of described switch element connect, the radiofrequency signal that described radio-frequency (RF) receiving and transmission module receives is coupled to described detection module by described coupling module, enables described detection module detect the received signal strength of described radio-frequency (RF) receiving and transmission module; When having detected the received signal strength of described radio-frequency (RF) receiving and transmission module, the input of described switch element and the output of described switch element have disconnected.
Wherein, described circuit also comprises control module, described control module connects described radio-frequency (RF) receiving and transmission module and described detection module respectively, and the intensity that described control module is used for the radiofrequency signal detected according to described detection module adjusts the receiving sensitivity of described radio-frequency (RF) receiving and transmission module.
Wherein, described switch element also comprises control end, and the control end of described switch element connects described control module; When detecting the received signal strength of described radio-frequency (RF) receiving and transmission module, described control module controls described input and described output connects; When having detected the received signal strength of described radio-frequency (RF) receiving and transmission module, described control module controls described input and described output disconnects.
Wherein, described switch element comprises electronic switch, and described electronic switch is transistor or electronic analog swtich.
Wherein, described transistor is triode or field effect transistor.
Wherein, described switch element also comprises current-limiting resistance, and one end of described current-limiting resistance connects power supply, and the other end of described current-limiting resistance connects the input of described switch element.
Wherein, described switch element also comprises the first choke, and one end of described first choke connects the output of described switch element, the other end ground connection of described first choke.
Wherein, the input of described switch element is also connected the second choke with between described current-limiting resistance.
Wherein, described switch element also comprises the first divider resistance and the second divider resistance, one end of described first divider resistance connects described control module, the other end of described first divider resistance connects the control end of described electronic switch, the control end of described electronic switch also connects one end of described second divider resistance, the other end ground connection of described second divider resistance.
For solving the problem, another technical scheme that the application adopts is: provide a kind of terminal, described terminal comprises processor, memory, wherein, described terminal also comprises the testing circuit described in above-mentioned any one, and described processor connects described memory and described testing circuit respectively.
In such scheme, by arranging coupling resistance and switch element between radio-frequency (RF) receiving and transmission module and detection module, when detection module detects the received signal strength of radio-frequency (RF) receiving and transmission module, switching means conductive; After detection, switch element disconnects, thus isolation radio-frequency (RF) receiving and transmission module and detection module, the radio frequency signal attenuation that coupling module causes can be reduced, improve accuracy of detection and receiving sensitivity.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of testing circuit that prior art provides;
Fig. 2 is the degree of coupling and the signal attenuation curve chart of coupling module in Fig. 1;
Fig. 3 is the structural representation of a kind of testing circuit that the embodiment of the present application provides;
Degree of coupling when Fig. 4 is the switching means conductive in the coupling module that provides of the embodiment of the present application and signal attenuation curve chart;
Fig. 5 is the degree of coupling of the switch element in the coupling module that provides of the embodiment of the present application when disconnecting and signal attenuation curve chart;
Fig. 6 is the structural representation of the another kind of testing circuit that the embodiment of the present application provides;
Fig. 7 is the circuit structure diagram of Fig. 6 breaker in middle unit;
Fig. 8 is the structural representation of a kind of terminal that the embodiment of the present application provides.
Embodiment
In below describing, in order to illustrate instead of in order to limit, propose the detail of such as particular system structure, interface, technology and so on, thoroughly to understand the application.
Consult Fig. 2, Fig. 2 is the structural representation of a kind of testing circuit that the embodiment of the present application provides.The testing circuit of the present embodiment is applied to rf terminal or broadband time slot sense terminals, but is not limited to this, can also be applied to other terminal in other embodiments.
The testing circuit of the present embodiment comprises radio-frequency (RF) receiving and transmission module 210, coupling module 220 and detection module 230, and coupling module 220 connects radio-frequency (RF) receiving and transmission module 210 and detection module 230.Wherein, coupling module 220 comprises coupling resistance 221 and switch element 222, and switch element 222 comprises input 223 and output 224.
One end of coupling resistance 221 connects radio-frequency (RF) receiving and transmission module 210, the input 223 of the other end connecting valve unit 222 of coupling resistance 221, output 224 connection detection module 230 of switch element 222.
Radio-frequency (RF) receiving and transmission module 210 is for transmitting radio frequency signal.Coupling module 220 is coupled to detection module 230 for radiofrequency signal radio-frequency (RF) receiving and transmission module 210 received.Detection module 230 is for detecting the received signal strength (Received Signal StrengthIndication, RSSI) of radio-frequency (RF) receiving and transmission module 210.
When detecting the received signal strength of radio-frequency (RF) receiving and transmission module 210, the input 223 of switch element 222 connects with the output 224 of switch element 222, switch element 222 conducting, the radiofrequency signal that radio-frequency (RF) receiving and transmission module 210 receives is coupled to detection module 230 by coupling module 220, makes detection module 230 can detect the received signal strength of radio-frequency (RF) receiving and transmission module 210.
When having detected the received signal strength of radio-frequency (RF) receiving and transmission module 210, the input 223 of switch element 222 has disconnected with the output 224 of switch element 222, and switch element 222 disconnects.
Particularly, when detection module 230 detects the received signal strength of radio-frequency (RF) receiving and transmission module 210, the input 223 of control switch unit 222 connects with the output 224 of switch element 222, makes switch element 222 conducting.After switch element 222 conducting, the radiofrequency signal that radio-frequency (RF) receiving and transmission module 210 receives is coupled to detection module 230 by coupling module 220.Detection module 230 detects the received signal strength of radio-frequency (RF) receiving and transmission module 210.
When detection module 230 detects complete, the input 223 of control switch unit 222 disconnects with the output 224 of switch element 222, and switch element 222 is disconnected.
Wherein, the value of coupling resistance is larger, and the degree of coupling of coupling module 220 is lower, and detection module 230 detects that the received signal strength of radio-frequency (RF) receiving and transmission module 210 is more weak.The value of coupling resistance can be arranged according to actual needs, is not restricted herein.Switch element 222 can be simulant electronic switch, also can be the electronic switch of other types, not be restricted herein.
In the present embodiment, the method for control switch unit 222 conducting and disconnection for send triggering signal by detection module 230 to radio-frequency (RF) receiving and transmission module 210, can trigger radio-frequency (RF) receiving and transmission module 210 control switch unit 222 and is turned on or off; Also can be turned on or off for the direct control switch unit 222 of detection module 230.In other embodiments, can also be other control mode, not be restricted herein.
See also Fig. 4 to Fig. 5, degree of coupling when Fig. 4 is the switching means conductive in the coupling module that provides of the embodiment of the present application and signal attenuation curve chart, Fig. 5 is the degree of coupling of the switch element in the coupling module that provides of the embodiment of the present application when disconnecting and signal attenuation curve chart.
As shown in Figure 4, when switch element 222 conducting, the degree of coupling curve of coupling module 220 is more smooth, and the fluctuation range of the degree of coupling is less.Wherein, as frequency f=410.0MHz, the degree of coupling of coupling module 220 is-10.101dB, and the signal attenuation caused by coupling module 220 is-1.5dB.
As shown in Figure 5, when switch element disconnects, the isolation due to switch element 222 is not 100%, thus makes the portion radio frequency signal of radio-frequency (RF) receiving and transmission module 210 be coupled to detection module 230.The degree of coupling curve of coupling module 220 is curve.As frequency f=410.0MHz, the degree of coupling of coupling module 220 is-31.679dB, and the signal attenuation caused by coupling module 220 is-0.07dB.
Wherein, the absolute value of the degree of coupling of coupling module 220 is larger, and its signal attenuation introduced is less, and detection module 230 detects that the received signal strength of radio-frequency (RF) receiving and transmission module 210 is more weak.
The absolute value of signal attenuation is larger, and detection module 230 detects that the received signal strength of radio-frequency (RF) receiving and transmission module 210 is stronger.
In such scheme, coupling resistance and switch element are set between radio-frequency (RF) receiving and transmission module and detection module, when detection module detects the received signal strength of radio-frequency (RF) receiving and transmission module, switching means conductive; After detection, switch element disconnects, thus isolation radio-frequency (RF) receiving and transmission module and detection module, the radio frequency signal attenuation that coupling module causes can be reduced, improve accuracy of detection and receiving sensitivity.
Refer to Fig. 6 to Fig. 7, Fig. 6 is the structural representation of the another kind of testing circuit that the embodiment of the present application provides, and Fig. 7 is the circuit structure diagram of Fig. 6 breaker in middle unit.
The testing circuit of the present embodiment is applied to rf terminal or broadband time slot sense terminals, but is not limited to this, can also be applied to other terminal in other embodiments.The testing circuit of the present embodiment comprises radio-frequency (RF) receiving and transmission module 310, coupling module 320, detection module 330 and control module 340, coupling module 320 connects radio-frequency (RF) receiving and transmission module 310 and detection module 330, and control module 340 connects radio-frequency (RF) receiving and transmission module 310, coupling module 320 and detection module 330 respectively.Be understandable that, detection module 230 and control module 340 can become one, and also can be two independently modules.
Wherein, coupling module 320 comprises coupling resistance 321 and switch element 322, and switch element 322 comprises input 323, output 324 and control end 325.
One end of coupling resistance 321 connects radio-frequency (RF) receiving and transmission module 310, the input 323 of the other end connecting valve unit 322 of coupling resistance 321, output 324 connection detection module 330 of switch element 222, coupling module 320 is by control end 325 link control module 340 of switch element 322.
Wherein, switch element 222 comprises electronic switch Q, and electronic switch Q can be transistor or electronic analog swtich.Transistor can be field effect transistor, triode or Darlington transistor.
When electronic switch Q is field effect transistor, the control end 325 of switch element 322, input 323 and output 324 correspond to the grid of field effect transistor, source electrode or drain electrode respectively.
Wherein, when electronic switch Q is P type field effect transistor, grid is control end, source electrode is input, drain output.When electronic switch Q is N-type field effect transistor, grid is control end, drain electrode input, source electrode are output.
When electronic switch Q be triode or Darlington transistor time, the control end 325 of switch element 322, input 323 and output 324 correspond to base stage, the collector and emitter of Darlington transistor or triode respectively.
Switch element 322 also comprises current-limiting resistance R1, and one end of current-limiting resistance R1 connects power Vcc, the input 323 of the other end connecting valve unit 322 of current-limiting resistance R1.
Switch element 322 also comprises the first choke L1, the other end ground connection of output 324, the first choke L1 of one end connecting valve unit 322 of the first choke L1.
Alternatively, switch element 322 input 323 be also connected the second choke L2 between current-limiting resistance R1.
Alternatively, switch element 322 also comprises the first divider resistance R2 and the second divider resistance R3, one end of first divider resistance R2 connects by control end 325 link control module 340, the other end of the first divider resistance R2 connects the control end of electronic switch Q, the control end of electronic switch Q also connects one end of the second divider resistance R3, the other end ground connection of the second divider resistance R3.
Radio-frequency (RF) receiving and transmission module 210 is for transmitting radio frequency signal.Coupling module 220 is coupled to detection module 230 for radiofrequency signal radio-frequency (RF) receiving and transmission module 210 received.Detection module 230 is for detecting the received signal strength of radio-frequency (RF) receiving and transmission module 210.Control module 340 is for the receiving sensitivity of the intensity adjustment radio-frequency (RF) receiving and transmission module 310 of the radiofrequency signal that detects according to detection module 330.
Wherein, the current-limiting resistance R1 in switch element 322 is for reducing the electric current of the input of electronic switch Q.First choke L1 enters reference horizontal plane of manufacturing for preventing the radiofrequency signal flowing through output 324, causes signal disturbing to earth signal.Second choke L2 mixes with power supply for preventing the radiofrequency signal flowing through input 323, causes signal disturbing to power supply signal.First divider resistance R2 and the second divider resistance R3 is used for providing bias voltage for electronic switch Q.
When detection module 330 detects the received signal strength of radio-frequency (RF) receiving and transmission module 310, the input of control module 340 control switch unit 322 and the output of switch element 322 connect, control switch unit 322 conducting; When detection module 330 has detected the received signal strength of radio-frequency (RF) receiving and transmission module 310, the input of control module 340 control switch unit 322 and the output of switch element 322 have disconnected, and control switch unit 322 disconnects.
The receiving sensitivity of the intensity adjustment radio-frequency (RF) receiving and transmission module 310 of the radiofrequency signal that control module 340 detects according to detection module 330.
Particularly, as shown in Figure 7, the input 323 of switch element 322 connects the input of electronic switch Q, and the output of switch element 322 connects the output of electronic switch Q, and the control end 325 of switch element 322 is connected to the control end of electronic switch Q by the first divider resistance R2.
The input 323 of switch element 322 be also connected current-limiting resistance R1 and the second choke L2 between power Vcc.The output 324 of switch element 322 also connects one end of the first choke L1, the other end ground connection of the first choke L1.The control end 325 of switch element 322 also connects one end of the first divider resistance R2, the other end of the first divider resistance R2 connects the control end of electronic switch Q, the control end of electronic switch Q also connects one end of the second divider resistance R3, the other end ground connection of the second divider resistance R3.
Wherein, electronic switch Q can be transistor or electronic analog swtich.Transistor can be field effect transistor, triode or Darlington transistor.When electronic switch Q is field effect transistor, the control end 325 of switch element 322, input 323 and output 324 correspond to the grid of field effect transistor, source electrode or drain electrode respectively.Wherein, when electronic switch Q is P type field effect transistor, grid is control end, source electrode is input, drain output.When electronic switch Q is N-type field effect transistor, grid is control end, drain electrode input, source electrode are output.
When electronic switch Q be triode or Darlington transistor time, the control end 325 of switch element 322, input 323 and output 324 correspond to base stage, the collector and emitter of Darlington transistor or triode respectively.
When the value enough large (such as, R1 is greater than 500 Ω) of current-limiting resistance R1, the second choke L2 is optional.L2 can be 890nH.
When control module 340 can provide enough bias voltages for electronic switch Q, when control electronic switch Q is turned on or off, the first divider resistance R2 and the second divider resistance R3 is also optional.R2, R3 can be 20K Ω.
When detection module 330 detects the received signal strength of radio-frequency (RF) receiving and transmission module 310, control module 340 passes through control end 325 to switch element 322 input control signal, the input 323 of control switch unit 322 connects with the output 324 of switch element 322, makes switch element 322 conducting.After switch element 322 conducting, the radiofrequency signal that radio-frequency (RF) receiving and transmission module 310 receives is coupled to detection module 330 by coupling resistance 321 and switch element 322 by coupling module 320.Detection module 330 detects the received signal strength of radio-frequency (RF) receiving and transmission module 310.
When detection module 230 detects complete, control module 340 is by control end 325 to switch element 322 input control signal, and the input 323 of control switch unit 322 disconnects with the output 324 of switch element 322, and switch element 322 is disconnected.
Wherein, the value of coupling resistance is larger, and the degree of coupling of coupling module 320 is lower, and detection module 330 detects that the received signal strength of radio-frequency (RF) receiving and transmission module 310 is more weak.The value of coupling resistance can be arranged according to actual needs, is not restricted herein.
When electronic switch Q is field effect transistor, the control end 325 of switch element 322, input 323 and output 324 correspond to the grid of thin-film transistor, source electrode or drain electrode respectively.
Wherein, when electronic switch Q is P type field effect transistor, grid is control end, source electrode is input, drain output.When electronic switch Q is N-type field effect transistor, grid is control end, drain electrode input, source electrode are output.
When electronic switch Q is P type field effect transistor, when detection module 330 detects the received signal strength of radio-frequency (RF) receiving and transmission module 310, control module 340 is high level signal by control end 325 to the control signal that switch element 322 inputs, Vcc is forward voltage, connect with the source electrode and drain electrode that control field effect transistor, make field effect transistor Q conducting.When detecting complete, control module 340 is low level signal by control end 325 to the control signal that switch element 322 inputs, and disconnects, field effect transistor Q is disconnected with the source electrode and drain electrode that control field effect transistor.
When electronic switch Q is N-type field effect transistor, when detection module 330 detects the received signal strength of radio-frequency (RF) receiving and transmission module 310, control module 340 is low level signal by control end 325 to the control signal that switch element 322 inputs, Vcc is forward voltage, connect with the drain electrode and source electrode that control field effect transistor, make field effect transistor Q conducting.When detecting complete, control module 340 is high level signal by control end 325 to the control signal that switch element 322 inputs, and disconnects, field effect transistor Q is disconnected with the drain electrode and source electrode that control field effect transistor.
When electronic switch Q be triode or Darlington transistor time, the control end 325 of switch element 322, input 323 and output 324 correspond to base stage, the collector and emitter of Darlington transistor or triode respectively.
Wherein, when electronic switch Q is P type triode or P type Darlington transistor, when detection module 330 detects the received signal strength of radio-frequency (RF) receiving and transmission module 310, control module 340 is high level signal by control end 325 to the control signal that switch element 322 inputs, Vcc is forward voltage, connect with the collector and emitter controlling field effect transistor, make P type triode or the conducting of P type Darlington transistor.When detecting complete, control module 340 is low level signal by control end 325 to the control signal that switch element 322 inputs, and disconnects with the collector and emitter controlling field effect transistor, and P type triode or P type Darlington transistor are disconnected.
When electronic switch Q is N-type triode or N-type Darlington transistor, when detection module 330 detects the received signal strength of radio-frequency (RF) receiving and transmission module 310, control module 340 is low level signal by control end 325 to the control signal that switch element 322 inputs, Vcc is negative voltage, connect with the collector and emitter controlling field effect transistor, make N-type triode or the conducting of N-type Darlington transistor.When detecting complete, control module 340 is high level signal by control end 325 to the control signal that switch element 322 inputs, and disconnects with the collector and emitter controlling field effect transistor, and N-type triode or N-type Darlington transistor are disconnected.
Be understandable that, electronic switch Q is not limited to simulant electronic switch, triode, Darlington transistor, field effect transistor, can also be the electronic switch of other types.
After detection module 230 has detected the RSSI of radio-frequency (RF) receiving and transmission module 310, RSSI is sent to control module 340, adjusted the receiving sensitivity of radio-frequency (RF) receiving and transmission module 310 to make control module 340 according to the RSSI made referrals to.Wherein, the signal attenuation in testing circuit is larger, and the receiving sensitivity of radio-frequency (RF) receiving and transmission module 310 is also poorer.
See also Fig. 4 to Fig. 5, degree of coupling when Fig. 4 is the switching means conductive in the coupling module that provides of the embodiment of the present application and signal attenuation curve chart, Fig. 5 is the degree of coupling of the switch element in the coupling module that provides of the embodiment of the present application when disconnecting and signal attenuation curve chart.
As shown in Figure 4, when switch element 322 conducting, the degree of coupling curve of coupling module 320 is more smooth, and the fluctuation range of the degree of coupling is less.Wherein, as frequency f=410.0MHz, the degree of coupling of coupling module 320 is-10.101dB, and the signal attenuation caused by coupling module 320 is-1.5dB.
As shown in Figure 5, when switch element disconnects, the isolation due to switch element 322 is not 100%, thus makes the portion radio frequency signal of radio-frequency (RF) receiving and transmission module 210 be coupled to detection module 330.The degree of coupling curve of coupling module 320 is curve.As frequency f=410.0MHz, the degree of coupling of coupling module 320 is-31.679dB, and the signal attenuation caused by coupling module 320 is-0.07dB.
Wherein, the absolute value of the degree of coupling of coupling module 320 is larger, and its signal attenuation introduced is less, and detection module 330 detects that the received signal strength of radio-frequency (RF) receiving and transmission module 310 is more weak.
The absolute value of signal attenuation is larger, and detection module 330 detects that the received signal strength of radio-frequency (RF) receiving and transmission module 310 is stronger.
In such scheme, coupling resistance and switch element are set between radio-frequency (RF) receiving and transmission module and detection module, when detection module detects the received signal strength of radio-frequency (RF) receiving and transmission module, switching means conductive; After detection, switch element disconnects, thus isolation radio-frequency (RF) receiving and transmission module and detection module, the radio frequency signal attenuation that coupling module causes can be reduced, improve accuracy of detection and receiving sensitivity.
Refer to Fig. 8, Fig. 8 is the structural representation of a kind of terminal that the embodiment of the present application provides.Terminal in the present embodiment comprises testing circuit 410, processor 420 and memory 430.Processor 420 is connection detection circuit 410 and memory 430 respectively.Wherein, testing circuit 410 is the testing circuit described in above-mentioned any embodiment, specifically refers to the associated description in above-described embodiment, does not repeat herein.
In more than describing, in order to illustrate instead of in order to limit, propose the detail of such as particular system structure, interface, technology and so on, thoroughly to understand the application.But, it will be clear to one skilled in the art that and also can realize the application in other execution mode not having these details.In other situation, omit the detailed description to well-known device, circuit and method, in order to avoid unnecessary details hinders the description of the application.
Claims (10)
1. a testing circuit, described testing circuit comprises radio-frequency (RF) receiving and transmission module, coupling module and detection module, described coupling module connects described radio-frequency (RF) receiving and transmission module and described detection module, it is characterized in that, described coupling module comprises coupling resistance and switch element;
One end of described coupling resistance connects described radio-frequency (RF) receiving and transmission module, and the other end of described coupling resistance connects the input of described switch element, and the output of described switch element connects described detection module;
Described radio-frequency (RF) receiving and transmission module is used for transmitting radio frequency signal;
Described coupling module is used for the radiofrequency signal that described radio-frequency (RF) receiving and transmission module receives to be coupled to described detection module;
Described detection module is for detecting the received signal strength of described radio-frequency (RF) receiving and transmission module;
When detecting the received signal strength of described radio-frequency (RF) receiving and transmission module, the input of described switch element and the output of described switch element connect, the radiofrequency signal that described radio-frequency (RF) receiving and transmission module receives is coupled to described detection module by described coupling module, enables described detection module detect the received signal strength of described radio-frequency (RF) receiving and transmission module;
When having detected the received signal strength of described radio-frequency (RF) receiving and transmission module, the input of described switch element and the output of described switch element have disconnected.
2. circuit according to claim 1, it is characterized in that, described circuit also comprises control module, described control module connects described radio-frequency (RF) receiving and transmission module and described detection module respectively, and the intensity that described control module is used for the radiofrequency signal detected according to described detection module adjusts the receiving sensitivity of described radio-frequency (RF) receiving and transmission module.
3. circuit according to claim 2, is characterized in that, described switch element also comprises control end, and the control end of described switch element connects described control module;
When detecting the received signal strength of described radio-frequency (RF) receiving and transmission module, described control module controls described input and described output connects; When having detected the received signal strength of described radio-frequency (RF) receiving and transmission module, described control module controls described input and described output disconnects.
4. circuit according to claim 3, is characterized in that, described switch element comprises electronic switch, and described electronic switch is transistor or electronic analog swtich.
5. circuit according to claim 4, is characterized in that, described transistor is triode or field effect transistor.
6. circuit according to claim 5, is characterized in that, described switch element also comprises current-limiting resistance, and one end of described current-limiting resistance connects power supply, and the other end of described current-limiting resistance connects the input of described switch element.
7. the circuit according to any one of claim 1 to 6, is characterized in that, described switch element also comprises the first choke, and one end of described first choke connects the output of described switch element, the other end ground connection of described first choke.
8. circuit according to claim 7, is characterized in that, the input of described switch element is also connected the second choke with between described current-limiting resistance.
9. the circuit according to Claim 8 described in any one, it is characterized in that, described switch element also comprises the first divider resistance and the second divider resistance, one end of described first divider resistance connects described control module, the other end of described first divider resistance connects the control end of described electronic switch, the control end of described electronic switch also connects one end of described second divider resistance, the other end ground connection of described second divider resistance.
10. a terminal, described terminal comprises processor, memory, it is characterized in that, described terminal also comprises the testing circuit as described in any one of claim 1-9, and described processor connects described memory and described testing circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292121.2A CN104967492B (en) | 2015-06-01 | 2015-06-01 | A kind of detection circuit and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292121.2A CN104967492B (en) | 2015-06-01 | 2015-06-01 | A kind of detection circuit and terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104967492A true CN104967492A (en) | 2015-10-07 |
| CN104967492B CN104967492B (en) | 2018-04-24 |
Family
ID=54221447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510292121.2A Active CN104967492B (en) | 2015-06-01 | 2015-06-01 | A kind of detection circuit and terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104967492B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242127A (en) * | 1996-10-29 | 2000-01-19 | 三星电子株式会社 | Circuit for eliminating external interference signals in code division multiple access mobile phone |
| CN1324197A (en) * | 2000-05-11 | 2001-11-28 | 英业达集团（南京）电子技术有限公司 | Power output regulating method and regulator for radio auxiliary terminal |
| CN101425680A (en) * | 2008-12-08 | 2009-05-06 | 中兴通讯股份有限公司 | Overdriving protection method and circuit |
| CN102496036A (en) * | 2011-11-16 | 2012-06-13 | 深圳市远望谷信息技术股份有限公司 | Antenna switching device for receiving and transmitting diversity and RFID (Radio Frequency Identification) reader-writer |
| US20130252661A1 (en) * | 2010-07-23 | 2013-09-26 | Novero Dabendorf Gmbh | Coupling an electronic apparatus having a radio link, in particular a mobile telephone, to devices of a motor vehicle |
-
2015
- 2015-06-01 CN CN201510292121.2A patent/CN104967492B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242127A (en) * | 1996-10-29 | 2000-01-19 | 三星电子株式会社 | Circuit for eliminating external interference signals in code division multiple access mobile phone |
| CN1324197A (en) * | 2000-05-11 | 2001-11-28 | 英业达集团（南京）电子技术有限公司 | Power output regulating method and regulator for radio auxiliary terminal |
| CN101425680A (en) * | 2008-12-08 | 2009-05-06 | 中兴通讯股份有限公司 | Overdriving protection method and circuit |
| US20130252661A1 (en) * | 2010-07-23 | 2013-09-26 | Novero Dabendorf Gmbh | Coupling an electronic apparatus having a radio link, in particular a mobile telephone, to devices of a motor vehicle |
| CN102496036A (en) * | 2011-11-16 | 2012-06-13 | 深圳市远望谷信息技术股份有限公司 | Antenna switching device for receiving and transmitting diversity and RFID (Radio Frequency Identification) reader-writer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104967492B (en) | 2018-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103384962B (en) | Antenna switch circuit and wireless terminal device | |
| CN109150203B (en) | Antenna switching circuit and antenna system | |
| CN103580610B (en) | Multimode power amplifier and corresponding mobile communication terminal | |
| CN106941382B (en) | Self-calibration implementation method and device of radio frequency matrix switch | |
| US9113367B2 (en) | Method, apparatus and system for determining voltage standing wave ratio in a downlink period of radio communication | |
| CN105024677A (en) | Rf switch circuit | |
| US9804984B2 (en) | Device and method for detecting types of universal serial bus cable | |
| US20100225378A1 (en) | Radio frequency switching circuit and semiconductor device | |
| CN102608513B (en) | On-chip testing structure for a radio frequency switching chip and testing method | |
| US9147937B2 (en) | Multiple-antenna system | |
| US8027648B2 (en) | Radio frequency power monitor | |
| CN102055697B (en) | Energy-saving circuit of cable modem | |
| CN104079275A (en) | Radio frequency switch assembly | |
| CN103795482B (en) | A kind of antenna transmission performance adjusting method | |
| CN109379141B (en) | Time division duplex radio over fiber transmission system | |
| CN102647163B (en) | Variable-gain amplification circuit | |
| CN113612496A (en) | Automatic radio frequency matching control system, base station system and method | |
| US20140287699A1 (en) | Rf front-end module | |
| CN104714116A (en) | Antenna detection circuit | |
| CN104967492A (en) | Detection circuit and terminal | |
| CN102487276B (en) | double-pole double-throw switch device | |
| CN216082956U (en) | Antenna on-site detection unit and radio frequency device | |
| US6683912B1 (en) | Communication bus system | |
| CN206725750U (en) | A kind of VHF ionospheric irregularities detection system transmit-receive switch | |
| CN207460126U (en) | A kind of switching circuit carried out through same interface signal input and output |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |