CN2506026Y - Radio transmitting circuit with adjustable radio frequency transmission power - Google Patents
Radio transmitting circuit with adjustable radio frequency transmission power Download PDFInfo
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- CN2506026Y CN2506026Y CN 01266146 CN01266146U CN2506026Y CN 2506026 Y CN2506026 Y CN 2506026Y CN 01266146 CN01266146 CN 01266146 CN 01266146 U CN01266146 U CN 01266146U CN 2506026 Y CN2506026 Y CN 2506026Y
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Abstract
The utility model relates to a radio transmitting circuit with adjustable radio frequency transmission power, which comprises a signal modulation oscillating stage, a power amplifying stage and a filter circuit, wherein the biasing condition of an output transistor in the signal modulation oscillating stage or the power amplifying stage can be adjusted by a biasing control circuit, and thus, the output power of the signal modulation oscillating stage or the power amplifying stage is adjusted. When the utility model is used in a radio input device and is used in a short range, low transmitting power can be selected for use. When the utility model is used in a long range, large transmitting power can be adjusted for use. Thus, the service life of a battery in the radio input device can be effectively prolonged, and the transmitting power can be enlarged when the transmission in a long range is needed, so the purpose of transmission in a long range is achieved.
Description
Technical field
The utility model is the design about a kind of radio transmitter, particularly about a kind of radio transmitter of adjustable radio frequency transmission power, is by the bias condition of adjusting the output transistor in this radio transmitter, and adjusts its power output.
Background technology
Because the function of computer is become stronger day by day, the hierarchy of skill of computer peripheral equipment is also become stronger day by day.In the various computer input units in early days, for example computer mouse, keyboard, rocking bar, trace ball etc., all be by data transmission interface (for example serial, arranged side by side, USB ... Deng), be sent in the computer installation with input data these input units, computer installation can carry out corresponding action after receiving the data that these input units import.
Computer input units such as keyboard in the market, mouse, rocking bar under the continuous research and development of Radio Transmission Technology, are day by day popularized.But, when using the input unit of these wireless types, can't obtain working power from computer via cable, thus must be in this wireless type input unit equipped with battery, for should the required working power of wireless type input unit.
In order to guarantee the normal use of this wireless type input unit, promptly become one of emphasis of wireless product design the useful life of this battery.The size of the useful life of battery and product consumed power has very big relation.When using wireless product, can (such as the transmission end be to the distance of receiving terminal, the influence of the material of peripheral environment because of the difference of at that time environment for use ... etc. factor), the radio frequency transmission power of its transmission end has different demands.Moreover because wireless product is day by day popularized, the problem of interference is on the rise, if when deisgn product, considers above-mentioned problem, can reduce the use amount of battery, and avoid the problem of radiofrequency signal phase mutual interference.
Summary of the invention
Therefore, the utility model is promptly at the problems referred to above and demand, and designs a kind of adjustable radio-frequency transmissions control circuit.When this wireless type product when short distance is used, can use lower transmission (emission) power, when long distance is used, then can adopt bigger transmission (emission) power.So get final product extending battery life in the longer Distance Transmission of need, also can strengthen radio frequency transmission power and reach remote transmission.
Another purpose of the present utility model provides a kind of radio transmitter of adjustable radio frequency transmission power, adjust the power output that circuit is adjusted the output transistor in this radio transmitter by a bias voltage, to adjust the radio frequency transmission power of whole radio transmitter, can reach the useful life of power saving and prolongation battery.
For achieving the above object, in the radio transmitter of adjustable radio frequency transmission power of the present utility model, in its signal modulating oscillation level, a power-amplifier stage, be provided with a bias voltage and adjust circuit, it can be an adjustable resistance, adjust the bias condition that circuit can be adjusted the output transistor in this signal modulating oscillation level/power-amplifier stage by this bias voltage, thus to adjust the radio frequency transmission power of this radio transmitter.In another embodiment of the present utility model, also can include a frequency multiplication amplifying stage, before the power-amplifier stage of this radio transmitter and promote level, and its inside includes a bias voltage and adjusts circuit, with according to required transmitting power size and transmission range distance, adjust circuit by this bias voltage and adjust this power output at different levels.
The structural design of other purpose of the present utility model and circuit thereof will be further described by following embodiment and accompanying drawing.
Description of drawings
Fig. 1 is the circuit function block diagram of the utility model first embodiment;
Fig. 2 is the detailed control circuit of the utility model first embodiment;
Fig. 3 is the circuit function block diagram of the utility model second embodiment;
Fig. 4 is one of detailed circuit diagram of adjustable bias control circuit employed in figure 3;
Fig. 5 be adjustable bias control circuit employed in figure 3 detailed circuit diagram two
Fig. 6 be adjustable bias control circuit employed in figure 3 detailed circuit diagram three;
Fig. 7 be adjustable bias control circuit employed in figure 3 detailed circuit diagram four;
Fig. 8 be adjustable bias control circuit employed in figure 3 detailed circuit diagram five.
Description of reference numerals:
100: radio transmitter 101: radio transmitter
1: signal modulating oscillation level 2: power-amplifier stage
3: filter circuit 31: antenna
4: signal processing circuit 5: signal modulating oscillation level
6: frequency multiplication amplifying stage 7: promote level
8: power-amplifier stage 9: filter circuit
91: antenna 10: signal processing circuit
Embodiment
As shown in Figure 1, be the circuit function block diagram of the radio transmitter 100 of the adjustable radio frequency transmission power of the utility model first embodiment, and Fig. 2 is embodiment control circuit figure of the present utility model.This embodiment circuit application is in general wireless type input unit or indicator device.
Wireless transmission control circuit 100 of the present utility model mainly includes a signal modulating oscillation level 1, a power-amplifier stage 2, a filter circuit 3 and an antenna 31.Wherein the input of this signal modulating oscillation level 1 is connected to a signal processing circuit 4, to receive the input signal S1 that this signal processing circuit 4 is exported.
This signal processing circuit 4 can be for example computer mouse (mouse), keyboard (keyboard), rocking bar (joystick), trace ball (track ball), game console (game controller), Digital camera (digital signal camera/PC camera), digital camera (digital signal videocamera/PC video camera), or the signal processing circuit of other input unit (input device) or indicator device (pointing device) etc., to produce this input signal S1.The signal modulating oscillation level 1 that this input signal S1 at first is sent in the wireless transmission control circuit 100 is carried out the modulation of signal, and then through behind power-amplifier stage 2 and the filter circuit 3, RF signal S 2 is launched by antenna 31.
See also Fig. 2, in this signal modulating oscillation level 1, include the signal modulation and the two big functions of vibrating.Modulation circuit wherein is made up of capacitor C 1, C2, resistance R 1, R2, inductance L 1, diode D1, and this oscillating circuit then is made of oscillator X, resistance R 3, R4, R5, capacitor C 3, C4, C5, inductance L 2, output transistor Q1 and an adjustable resistance VR1.This adjustable resistance VR1 is series in the loop between working power Vcc and this output transistor Q1, adjusts circuit as the bias voltage in the utility model.
When the resistance of this adjustable resistance VR1 increased, the dc point of output transistor Q1 reduced, and had promptly reduced the bias value of output transistor Q1, so made the power output of this output transistor Q1 reduce.On the contrary, when the resistance of this adjustable resistance VR1 reduced, the dc point of output transistor Q1 raise, and had promptly increased the bias value of output transistor Q1, so made the power output of this output transistor Q1 raise.So, can change the bias condition of output transistor Q1, thus to adjust the power output of this signal modulating oscillation level 1 by the adjustable resistance VR1 that adjusts in this signal modulating oscillation level 1.
Signal data after ovennodulation can be sent to the amplification of carrying out radio-frequency power in the power-amplifier stage 2.Including capacitor C 6, C7, resistance R 6, inductance L 3, output transistor Q2 and an adjustable resistance VR2 in this power-amplifier stage 2 constitutes.Wherein the base terminal of this output transistor Q2 is as the signal input part of this power-amplifier stage 2, and it is connected to the collector terminal of the output transistor Q1 of this signal modulating oscillation level 1.And the collector terminal of this output transistor Q2 is connected to filter circuit 3 as the output of this power-amplifier stage 2.When the resistance of this adjustable resistance VR2 increased, the dc point of output transistor Q2 reduced, and had promptly reduced the bias value of output transistor Q2, so made the power output of this output transistor Q2 reduce.On the contrary, when the resistance of this adjustable resistance VR2 reduced, the dc point of output transistor Q2 raise, and had promptly increased the bias value of output transistor Q2, so made the power output of this output transistor Q2 raise.So, can change the bias condition of output transistor Q2, thus to adjust the power output of this power-amplifier stage 2 by the adjustable resistance VR2 that adjusts in this power-amplifier stage 2.
Include capacitor C 8, C9, C10, inductance L 4 in this filter circuit 3, it is connected to antenna 31, so that the output signal of this power-amplifier stage 2 is made Filtering Processing, produces a RF signal S 2, is launched by antenna 31.
Therefore, by the adjustable resistance VR1, the VR2 that adjust in this signal modulating oscillation level 1 and the power-amplifier stage 2, can change the transmitting power of radio transmitter 100.
As shown in Figure 3, be the circuit function block diagram of the radio transmitter 101 of the adjustable radio frequency transmission power of the utility model second embodiment.This embodiment circuit is the circuit structure diagram of general transmitting set.
Wireless transmission control circuit 101 of the present utility model mainly includes a signal modulating oscillation level 5, frequency multiplication amplifying stage 6, promotion level 7, power-amplifier stage 8, filter circuit 9, reaches an antenna 91.Wherein the input of this signal modulating oscillation level 5 is connected to a signal processing circuit 10, to receive the input signal S3 that this signal processing circuit 10 is exported.
The signal modulating oscillation level 5 that this input signal S3 at first is sent in the wireless transmission control circuit 101 is carried out the modulation of signal, and then the signal frequency multiplication of process frequency multiplication amplifying stage 6 is handled, and the signal power that promotes level 7 and power-amplifier stage 8 is amplified, after after the Filtering Processing of filter circuit 9, RF signal S 4 is launched by antenna 91.
Fig. 4 is one of detailed circuit diagram of the adjustable bias control circuit that adopted in the utility model, its can be applicable among Fig. 3 signal modulating oscillation level 5, frequency multiplication amplifying stage 6, promote in level 7 and the power-amplifier stage 8, so that input signal S31 is done the processing of modulation, frequency multiplication or amplification and exports an output signal S41.The circuit of this embodiment includes capacitor C 11, C12, resistance R 11, adjustable resistance VR11, output transistor Q11.In this circuit, the DC power supply Vcc that is applied to circuit is constant, and when the resistance of adjustable resistance VR11 increased, the dc point of output transistor Q11 reduced, promptly reduce the bias value of output transistor Q11, so made the power output of this output transistor Q11 reduce.On the contrary, when the resistance of this adjustable resistance VR11 reduced, the dc point of output transistor Q11 raise, and had promptly increased the bias value of output transistor Q11, so made the power output of this output transistor Q11 raise.So by adjusting the bias condition that this adjustable resistance VR11 can change output transistor Q11, thus to adjust its power output.
Fig. 5 is two of the detailed circuit diagram of the adjustable bias control circuit that adopted in the utility model, its can be applicable to equally among Fig. 3 signal modulating oscillation level 5, frequency multiplication amplifying stage 6, promote in level 7 and the power-amplifier stage 8.The circuit of this embodiment includes capacitor C 21, C22, resistance R 21, R22, output transistor Q21.And aspect the working power of this circuit, then have working power V1, V2, the V3...Vn of several different voltage quasi positions.Via a switching switch SW 1, the accurate position of working power that is supplied in this control circuit can be switched to one of working power V1, V2, V3...Vn.When switch to one have than high levle working power the time, then the power output of this circuit is higher.On the contrary, when switch to one have than low level working power the time, then the power output of this circuit is lower.So, can adjust the power output of this circuit by the accurate position of the working power of adjusting this circuit.
Fig. 6 is three of the detailed circuit diagram of the adjustable bias control circuit that adopted in the utility model, its can be applicable to equally among Fig. 3 signal modulating oscillation level 5, frequency multiplication amplifying stage 6, promote in level 7 and the power-amplifier stage 8.The circuit of this embodiment includes capacitor C 31, C32, resistance R 31, R32, R33, adjustable resistance VR31 and an output transistor Q31.Wherein this resistance R 33 and adjustable resistance VR31 series connection forms a bleeder circuit, is connected to then between a working power Vcc and the earth terminal, can adjust the accurate position of the working power of delivering in this control circuit by adjusting this adjustable resistance VR31.When the resistance of this adjustable resistance VR31 was heightened, the working power of sending was lower, so the power output of this circuit is lower.On the contrary, when the resistance of this adjustable resistance VR31 was turned down, the working power of sending was higher, so the power output of this circuit is higher.So can adjust the power output of this circuit by adjusting the adjustable resistance in this circuit.
Fig. 7 is four of the detailed circuit diagram of the adjustable bias control circuit that adopted in the utility model, its can be applicable to equally among Fig. 3 signal modulating oscillation level 5, frequency multiplication amplifying stage 6, promote in level 7 and the power-amplifier stage 8.The circuit of this embodiment includes capacitor C 41, C42, resistance R 41, adjustable resistance VR41, output transistor Q41.And aspect the working power of this circuit, then have working power V1, V2, the V3...Vn of several different voltage quasi positions.Via a switching switch SW 2, the accurate position of working power that is supplied in this control circuit can be switched to one of working power V1, V2, V3...Vn.When switch to one have than high levle working power the time, then the power output of this circuit is higher.On the contrary, when switch to one have than low level working power the time, then the power output of this circuit is lower.So, can adjust the power output of this circuit by the accurate position of the working power of adjusting this circuit.Except the switching of doing the accurate position of aforesaid voltage (coarse adjustment), the adjustment of this adjustable resistance VR41 that also can arrange in pairs or groups simultaneously and do the further adjustment (fine tuning) of power output.
Fig. 8 is five of the detailed circuit diagram of the adjustable bias control circuit that adopted in the utility model, its can be applicable to equally among Fig. 3 signal modulating oscillation level 5, frequency multiplication amplifying stage 6, promote in level 7 and the power-amplifier stage 8.The circuit of this embodiment includes a resistance R 51, adjustable resistance VR51 and an automatic gain control circuit AGC (Automatic Gain ControlCircuit).When the height of adjusting this adjustable resistance VR51, can control the power output of adjusting this circuit by this automatic gain control circuit AGC.
In addition, when the user operates all kinds of input unit under different environment, when for example the plane of operation is different material (for example when wooden desktop or irony desktop), or when each other interference (interference) between many wireless devices is big, also can select suitable transmitted power to operate, the mutual interference problem that so can reach power saving and avoid strong transmission signal to be produced by the utility model.
By the foregoing description explanation of the present utility model as can be known, the utility model really can provide the radio transmitter of an adjustable radio frequency transmission power, so that the user is when using radio input device, if when short distance is used, only need adopt lower transmitting power, when using, long distance then can select to use bigger transmitting power, so the power consumption of battery can be saved, and the battery life in this wireless device can be prolonged.
Above embodiment explanation only be embodiment explanation of the present utility model, allly is familiar with this operator and works as and can illustrate and do other all improvement and variation according to the foregoing description of the present utility model.Yet all improvement and variation that these are done according to the utility model embodiment, still belong to spirit of the present utility model and the Patent right requirement scope that defined in.
Claims (11)
1. the radio transmitter of an adjustable radio frequency transmission power is characterized by: include:
One signal modulating oscillation level in order to receiving a signal data of signal processing circuit input, and is carried out signal modulation process;
One power-amplifier stage in order to receiving signal data after the modulation that this signal modulating oscillation level sends, and amplifies this signal rate of doing work; This can and go out via antenna emission through the signal data of power amplification after treatment, is received for the receiving system in a distant place;
Wherein include a bias voltage one of in this signal modulating oscillation level, this power-amplifier stage at least and adjust circuit, with according to required transmitting power size and transmission range distance, adjust circuit to adjust the power output of this signal modulating oscillation level and/or power-amplifier stage by this bias voltage.
2. the radio transmitter of adjustable radio frequency transmission power as claimed in claim 1 is characterized by: after this signal data through power amplification can be handled via a filter circuit, gone out by this antenna emission again.
3. the radio transmitter of adjustable radio frequency transmission power as claimed in claim 1, it is characterized by: this signal processing circuit can be the signal processing circuit of computer mouse, keyboard, rocking bar, trace ball, game console, digital camera (digital signal camera/PC camera), digital video camera (digital signal video camera/PC video camera) etc., to produce this signal data.
4. the radio transmitter of adjustable radio frequency transmission power as claimed in claim 1 is characterized by: this bias voltage is adjusted circuit and is included an adjustable resistance, and it is series in the loop between dc supply and output transistor.
5. the radio transmitter of adjustable radio frequency transmission power as claimed in claim 1 is characterized by: this bias voltage is adjusted the dc supply that circuit includes a plurality of voltage quasi positions, supplies the operating voltage as this output transistor via a switching switch.
6. the radio transmitter of adjustable radio frequency transmission power as claimed in claim 1 is characterized by: also can include:
One frequency multiplication amplifying stage is in order to make process of frequency multiplication with the signal of this signal modulating oscillation level output;
One promotes level, first through elementary amplification before delivering to power amplifier in order to the signal that this frequency multiplication amplifying stage is sent;
Wherein also include a bias voltage one of in this signal modulating oscillation level, this power-amplifier stage, this frequency multiplication amplifying stage and this promotion level at least and adjust circuit, with according to required transmitting power size and transmission range distance, adjust the power output that circuit is adjusted this amplifying stage and/or promoted level by this bias voltage.
7. the radio transmitter of adjustable radio frequency transmission power as claimed in claim 6, it is characterized by: this bias voltage is adjusted circuit and is included an adjustable resistance, it is series in the loop between dc supply and output transistor, to adjust the dc point of this output transistor.
8. the radio transmitter of adjustable radio frequency transmission power as claimed in claim 6 is characterized by: this bias voltage is adjusted the dc supply that circuit includes a plurality of voltage quasi positions, supplies the operating voltage as this output transistor via a switching switch.
9. the radio transmitter of adjustable radio frequency transmission power as claimed in claim 6, it is characterized by: this bias voltage is adjusted circuit and is included a bleeder circuit that is made of a resistance and an adjustable resistance, dc supply is through behind this bleeder circuit, provide this output transistor required operating voltage again, and can adjust the dc point of this output transistor by adjusting this adjustable resistance.
10. the radio transmitter of adjustable radio frequency transmission power as claimed in claim 6 is characterized by: this bias voltage is adjusted circuit and is included:
One adjustable resistance, it is series in the loop between dc supply and output transistor, to adjust the dc point of this output transistor;
The dc supply of a plurality of voltage quasi positions, switch switch and this adjustable resistance via one and supply operating voltage again as this output transistor, by adjusting this adjustable resistance and switching the operating voltage of different voltage quasi positions, can adjust the dc point of this output transistor.
11. the radio transmitter of adjustable radio frequency transmission power as claimed in claim 6, it is characterized by: this bias voltage is adjusted circuit and is included an adjustable resistance and an automatic gain control circuit, the dc supply of this circuit via this adjustable resistance after, deliver to again in this automatic gain control circuit as working power, by the height of adjusting this adjustable resistance, can adjust the power output of this circuit via this automatic gain control circuit control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01266146 CN2506026Y (en) | 2001-11-02 | 2001-11-02 | Radio transmitting circuit with adjustable radio frequency transmission power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01266146 CN2506026Y (en) | 2001-11-02 | 2001-11-02 | Radio transmitting circuit with adjustable radio frequency transmission power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2506026Y true CN2506026Y (en) | 2002-08-14 |
Family
ID=33672873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01266146 Expired - Fee Related CN2506026Y (en) | 2001-11-02 | 2001-11-02 | Radio transmitting circuit with adjustable radio frequency transmission power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2506026Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428637C (en) * | 2003-03-19 | 2008-10-22 | 熊猫电子集团有限公司 | Dot frequency radio transmission and receiving circuit and device |
| US7496151B2 (en) | 2004-03-05 | 2009-02-24 | Panasonic Corporation | Transmitting circuit, communication equipment, audio equipment, video equipment, and transmitting method |
| CN105406878A (en) * | 2015-11-26 | 2016-03-16 | 杭州众传数字设备有限公司 | Voltage-adjustable frequency modulation transmitter |
| CN105577202A (en) * | 2016-01-11 | 2016-05-11 | 浙江大学 | 915MHz power adjustable high power radio frequency transmitter |
-
2001
- 2001-11-02 CN CN 01266146 patent/CN2506026Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428637C (en) * | 2003-03-19 | 2008-10-22 | 熊猫电子集团有限公司 | Dot frequency radio transmission and receiving circuit and device |
| US7496151B2 (en) | 2004-03-05 | 2009-02-24 | Panasonic Corporation | Transmitting circuit, communication equipment, audio equipment, video equipment, and transmitting method |
| CN105406878A (en) * | 2015-11-26 | 2016-03-16 | 杭州众传数字设备有限公司 | Voltage-adjustable frequency modulation transmitter |
| CN105577202A (en) * | 2016-01-11 | 2016-05-11 | 浙江大学 | 915MHz power adjustable high power radio frequency transmitter |
| CN105577202B (en) * | 2016-01-11 | 2018-04-03 | 浙江大学 | A kind of high-power RF transmitter of 915MHz power adjustables |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |