CN201657336U - Self-adjusting circuit of output of communication equipment - Google Patents
Self-adjusting circuit of output of communication equipment Download PDFInfo
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- CN201657336U CN201657336U CN2010201498191U CN201020149819U CN201657336U CN 201657336 U CN201657336 U CN 201657336U CN 2010201498191 U CN2010201498191 U CN 2010201498191U CN 201020149819 U CN201020149819 U CN 201020149819U CN 201657336 U CN201657336 U CN 201657336U
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Abstract
The utility model relates to a self-adjusting circuit of an output of communication equipment, which can be used for mobile wireless communication equipment and controlling an output thereof. The self-adjusting circuit mainly comprises a power adjusting circuit, a first flexibility detection circuit, a second flexibility detection circuit and a comparison circuit, wherein the power adjusting circuit is used for adjusting power of transmission signals, the first flexibility detection circuit is used for detecting the first flexibility of the amplified transmission signals, the second flexibility detection circuit is used for detecting the second flexibility of the amplified transmission signals, and the comparison circuit is used for comparing output signal combination to local transmission slope signals generated by the wireless communication equipment. According to comparison results, dynamic range of the power adjusting circuit is controlled so as to realize self-adjustment of output signals.
Description
Technical field
The utility model relates to communication apparatus, and the transmission that relates in particular to the mobile radio communication equipment in the control TDMA mobile radio communication system is exported, it is exported self-adjusting technology.
Background technology
In global system for mobile communications GSM, in order to increase the communication traffic amount, general employing reduces the method for the size of communications zone (being also referred to as the communication cell) as far as possible, for portable communication apparatus, is the output that requires to reduce transmitting power.If reduced the communications zone size, the dynamic range that higher emission output will cause launching output control is widened, under the situation of using the transmitting power detection system, this can cause the expansion of the dynamic range of detector, thereby the emission output of using during to detected transmission output control is had higher requirement, and comparatively difficulty becomes.
Common detector comprises an independent diode, because the unilateral conduction of diode and certain conducting voltage (silicone tube is about 0.7V, and germanium tube is about 0.3V) cause such detector to be difficult to cover whole detection ranges of emission output.Therefore, the control system of available technology adopting FEEDBACK CONTROL replaces detecting emission output, also uses and detect the control system of electric current to feed back that enters current amplification circuit on current amplification circuit.
Yet, in such transmission current detection system, when system environments changes (for example temperature, supply voltage, channel frequency etc.), be difficult to the efficient of power adjusting circuit is carried out the compensation of standard.In the prior art in order to address this problem, storing one in the mobile wireless communication apparatus in advance is used for the memory table of adjusting is exported in transmission, based on software transmission output is adjusted and compensated, but, this method not only requires to be the jumbo memory of system configuration, and also needs to increase the quantity of the adjustment project that is used to adjust when making the mobile wireless communication apparatus.
The utility model content
In order to address the above problem, the purpose of this utility model is the output self-adjusting circuit that proposes a kind of communication apparatus.The output self-adjusting circuit of a kind of communication apparatus of the utility model disclosed output self-adjusting circuit comprises: signal generator branch, communication part and power adjusting circuit; Wherein, the signal generator branch is used to produce baseband signal and the transmitted waveform generation signal that has certain waveform; Communication part is used for described baseband signal is converted to radio-frequency transmission signals and offers power adjusting circuit; Power adjusting circuit is used for obtaining described radio-frequency transmission signals and it being enlarged into the transmission signals of the amplification of launching by antenna from communication part, by control the dynamic range of described power adjusting circuit with reference to the transmission signals of described amplification.
Preferably, described output self-adjusting circuit also comprises: first testing circuit, second testing circuit and combinational circuit.
Preferably, the waveform of described transmitted waveform generation signal is the slope.
Preferably, described first testing circuit comprises: the first sensitivity testing circuit, adopt first sensitivity to detect the transmission signals of described amplification to obtain the first sensitivity detection signal; Voltage limiting circuit comprising diode, thereby is used for the voltage limit of the described first sensitivity detection signal is produced first output voltage signal in specific voltage value scope.
Preferably, described second testing circuit comprises: the second sensitivity testing circuit, adopt second sensitivity to detect the transmission signals of described amplification to obtain the second sensitivity detection signal; The offset voltage supercircuit, thus the predetermined offset voltage that is used for superposeing on the described second sensitivity detection signal produces second output voltage signal.
Preferably, described offset voltage supercircuit comprises: offset voltage source is used to produce described predetermined offset voltage; Resistance circuit is used to connect described offset voltage source and the described second sensitivity testing circuit; Operation amplifier circuit is used for producing the second sensitivity detection signal of described predetermined offset voltage that superposeed, thereby produces described second output voltage signal.
Description of drawings
Fig. 1 is the output self-adjusting circuit block diagram of the communication apparatus of an embodiment of the present utility model;
Fig. 2 is the figure that shows transmitting power and time relation.
Symbol description
1 antenna, 2 power adjusting circuits
3 transmission signals, 4 couplers
5 first sensitivity testing circuits, 6 buffers
7 diodes, 8 buffers
9 resistance, 10 second sensitivity testing circuits
11 buffers, 12 resistance
13 offset voltages, 14 resistance
15 operational amplifiers, 16 resistance
17 resistance, 18 comparison circuits
19 transmitted waveform generation signals, 20 resistance
21 signal generators divide 22 communication parts
Embodiment
For the utility model is more readily understood, the utility model is described in more detail below in conjunction with accompanying drawing.
With reference to figure 1, the output self-adjusting circuit of this communication apparatus has the signal generator that produces baseband signal and divides 21 and be used for baseband signal is converted to the communication part 22 of radiofrequency signal (RF) as transmission signals 3, and transmission signals 3 offers power adjusting circuit 2.Power adjusting circuit 2 produces the transmission signals by the amplification of antenna 1 emission with transmission signals 3 power amplifications.
The transmission signals of the amplification that power adjusting circuit 2 produces carries out time control by following mode.Coupler 4 extracts the part of the transmission signals that amplifies and offers the testing circuit part.Testing circuit partly comprises first sensitivity (for example high sensitivity) testing circuit 5 and second sensitivity (for example muting sensitivity) testing circuit 10.The first sensitivity testing circuit 5 and the second sensitivity testing circuit 10 are carried out envelope detection and are produced one first sensitivity detection signal and one second sensitivity detection signal respectively.The first sensitivity testing circuit 5 is connected in series to a buffer 6.Equally, the second sensitivity testing circuit 10 is connected in series to a buffer 11.
The first sensitivity detection signal is provided for buffer 6.A diode 7 in parallel between the output of buffer 6 and earth potential.Diode 7 is used for preventing that buffer 6 from producing the voltage that is higher than diode 7 conducting voltage.That is to say that the voltage that offers buffer 8 is equal to or less than the conducting voltage of diode 7.
The second sensitivity detection signal is provided for buffer 11.The output of buffer 11 offers operational amplifier 15 by resistance 12.Further, by resistance 14 offset voltage 13 is offered operational amplifier 15.Resistance 16 is as feedback resistance.The size of offset voltage 13 is equal to or less than the conducting voltage of diode 7.
The output of the output of buffer 8 and operational amplifier 15 is combined into the combination voltage signal by resistance 9 and 17 respectively, offers comparison circuit 18.Divide 21 transmitted waveform generation signal 19 also to be provided for comparison circuit 18 from signal generator.Comparison circuit 18 compares combination voltage signal and transmitted waveform generation signal 19 and produces compare result signal.Comparative result is fed back to the input of comparison circuit 18 and feed back to the power control end of power adjusting circuit 2 by resistance 20.Power adjusting circuit 2 produces an output signal with reference to compare result signal control.
Figure 2 shows that the situation that the transmission signals power output rises in time.
With reference to figure 2 and Fig. 1, the power output of transmission signals must be controlled (as shown in Figure 2) by the time according to the transmitted waveform generation signal 19 with certain waveform (for example slope) or voltage.If power output is lower than the level A among Fig. 2, the first sensitivity testing circuit 5 produces an output voltage and buffer 6 produces an envelope detection signal separately.At this moment, the second sensitivity testing circuit 10 that has when power output is lower than level A than second sensitivity does not produce detection signal.Therefore, if power output is lower than level A, then the envelope detection signal (the first sensitivity detection signal) with buffer 6 offers comparison circuit 18 by buffer 8.As mentioned above, comparison circuit 18 compares the transmitted waveform generation signal 19 and the first sensitivity detection signal, produces the compare result signal of representing the difference between them.This compare result signal is provided for the power control end of power adjusting circuit 2.
When power output reached level A, the second sensitivity testing circuit 10 began to produce the second sensitivity detection signal.By buffer 11 this second sensitivity detection signal is offered operational amplifier 15.The voltage signal that operational amplifier 15 obtains superposeing by stack offset voltage 13 on the second sensitivity detection signal.After producing the second sensitivity detection signal, the output voltage of buffer 6 is near the conducting voltage of diode 7, thereby makes electric current flow through diode 7 gradually.As mentioned above, the output voltage of buffer 6 can not surpass the conducting voltage of diode 7.
The voltage signal that the voltage that comparison circuit 18 reception buffers 8 are exported by resistance 17 by the voltage and the operational amplifier 15 of resistance 9 outputs makes up.Comparison circuit 18 is transmitted waveform generation signal 19 and combination voltage signal relatively.As mentioned above, compare result signal is provided for the power control end of power adjusting circuit 2.
When power output reached level B, the output voltage of buffer 6 was not increased to the conducting voltage that is higher than diode 7.On the other hand, operational amplifier 15 produces the envelope detection signal (voltage signal of stack) that obtains by stack offset voltage 13 on the second sensitivity detection signal.Therefore, the output voltage of operational amplifier 15 (voltage signal of stack) provides the leading voltage to comparison circuit 18.
As mentioned above, according to the utility model, voltage limitator is connected to the output of the first sensitivity testing circuit and bias voltage is added on the second sensitivity testing circuit.Therefore, second sensitivity of can automaticallying switch output and first sensitivity output, thus realize transmitting the intelligence adjustment of output.And, because the output of the saturation voltage of the first sensitivity testing circuit and second sensitivity testing circuit generation beginning voltage is mutually the same.Therefore, the switching between the first sensitivity testing circuit and the second sensitivity testing circuit can be carried out reposefully.
With way of example the utility model is illustrated above, but the utility model is not limited to above-mentioned specific embodiment, all any change or modification of doing based on the utility model all belong to the claimed scope of the utility model.
Claims (6)
1. the output self-adjusting circuit of a communication apparatus comprises: signal generator branch, communication part and power adjusting circuit; Wherein, the signal generator branch is used to produce baseband signal and the transmitted waveform generation signal that has certain waveform; Communication part is used for described baseband signal is converted to radio-frequency transmission signals and offers power adjusting circuit; Power adjusting circuit is used for obtaining described radio-frequency transmission signals and it being enlarged into the transmission signals of the amplification of launching by antenna from communication part, by control the dynamic range of described power adjusting circuit with reference to the transmission signals of described amplification.
2. the output self-adjusting circuit of a kind of communication apparatus according to claim 1 is characterized in that, described output self-adjusting circuit also comprises: first testing circuit, second testing circuit and combinational circuit.
3. the output self-adjusting circuit of a kind of communication apparatus according to claim 1 is characterized in that, the waveform of described transmitted waveform generation signal is the slope.
4. the output self-adjusting circuit of a kind of communication apparatus according to claim 2, it is characterized in that, described first testing circuit comprises: the first sensitivity testing circuit, adopt first sensitivity to detect the transmission signals of described amplification to obtain the first sensitivity detection signal; Voltage limiting circuit comprising diode, thereby is used for the voltage limit of the described first sensitivity detection signal is produced first output voltage signal in specific voltage value scope.
5. the output self-adjusting circuit of a kind of communication apparatus according to claim 2, it is characterized in that, described second testing circuit comprises: the second sensitivity testing circuit, adopt second sensitivity to detect the transmission signals of described amplification to obtain the second sensitivity detection signal; The offset voltage supercircuit, thus the predetermined offset voltage that is used for superposeing on the described second sensitivity detection signal produces second output voltage signal.
6. the output self-adjusting circuit of a kind of communication apparatus according to claim 5 is characterized in that, described offset voltage supercircuit comprises: offset voltage source is used to produce described predetermined offset voltage; Resistance circuit is used to connect described offset voltage source and the described second sensitivity testing circuit; Operation amplifier circuit is used for producing the second sensitivity detection signal of described predetermined offset voltage that superposeed, thereby produces described second output voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201498191U CN201657336U (en) | 2010-04-06 | 2010-04-06 | Self-adjusting circuit of output of communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201498191U CN201657336U (en) | 2010-04-06 | 2010-04-06 | Self-adjusting circuit of output of communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201657336U true CN201657336U (en) | 2010-11-24 |
Family
ID=43122563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201498191U Expired - Fee Related CN201657336U (en) | 2010-04-06 | 2010-04-06 | Self-adjusting circuit of output of communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201657336U (en) |
-
2010
- 2010-04-06 CN CN2010201498191U patent/CN201657336U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20120406 |