CN100536545C - Electronic tuner and portable telephone device using the same - Google Patents
Electronic tuner and portable telephone device using the same Download PDFInfo
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- CN100536545C CN100536545C CNB2007101860486A CN200710186048A CN100536545C CN 100536545 C CN100536545 C CN 100536545C CN B2007101860486 A CNB2007101860486 A CN B2007101860486A CN 200710186048 A CN200710186048 A CN 200710186048A CN 100536545 C CN100536545 C CN 100536545C
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Abstract
An electronic tuner of the invention is provided with a high-frequency amplifier inserted between a television input terminal and a first filter and having a current control input for controlling a current value, and a current control unit for controlling the current of the high-frequency amplifier, and the current of the high-frequency amplifier is set larger while the portable telephone is sending a transmission signal.
Description
Technical field
Even if the present invention relates to the portable telephone device that mobile phone is in use also electronic tuning unit that can received tv broadcast signal and uses this electronic tuning unit.
Background technology
Below with reference to Figure 18 prior mobile phone device 1 is described.
Figure 18 is the block diagram of prior mobile phone device.Among Figure 18, prior mobile phone device 1 is made of the electronic tuning unit 2 and the mobile phone 3 of received tv broadcast signal.Electronic tuning unit 2 has: the TV input terminal 5 of input television broadcasting signal; Suppress the filter 6 of television broadcasting signal when being connected with input terminal 5 with external signal with this TV; The high-frequency amplifier 7 that connects these filter 6 outputs; Can carry out the high-frequency amplifier 8 of gain controlling when connecting these high-frequency amplifier 7 outputs; The input of its other end is then connecting the blender 12 of oscillator 10 outputs when providing these high-frequency amplifier 8 outputs to the input of an end wherein; The filter 13 that is connecting these blender 12 outputs; The TV demodulator circuit 14 that is connecting these filter 13 outputs; And the lead-out terminal 15 that is connecting these TV usefulness demodulator circuit 14 outputs.
On the other hand, mobile phone 3 is by transmission circuit 17 and provide this transmission circuit 17 respectively and the signal processing circuit 18 of the signal of lead-out terminal 15 output is constituted.
In this existing electronic tuning unit 2, the transmission signal that electronic tuning unit 2 is exported owing to the mobile phone 3 that is in the conversation has distortion to take place, can't be with the high-quality television broadcasting signal that receives.In order to suppress the transmission signal that this mobile phone 3 is exported, the TV of electronic tuning unit 2 is connected with the filter 6 that forms multistage formation with input terminal 5.
But with respect to for example highest channel of UHF broadcast singal is 770MHz, and the transmission signal that mobile phone 3 is exported is near 830MHz.This UHF broadcast singal especially diminishes in the countryside, and compare the transmission signal that mobile phone 3 exported with this UHF broadcast singal just very big.
In addition, the mobile phone of being located at mobile phone 3 uses antenna 2a comparatively close on distance with antenna 3a and TV.Therefore, need about 70dB or above this bigger attenuation in the filter 6 of electronic tuning unit 2 with respect to the attenuation that sends signal.
Therefore, just need between TV is with input terminal 5 and high-frequency amplifier 7, insert this filter 6 in the electronic tuning unit 2 of conventional example.But the filter 6 that so has this rapid attenuation of about 70dB is multistage formation.Therefore insertion loss just can increase 3～4dB.
Owing to insertion loss big filter 6 like this directly is connected with the output of TV with input terminal 5, so under the less situation of television broadcasting signal, its receiving sensitivity just reduces this attenuation of insertion loss 3～4dB of filter 6.
Summary of the invention
The invention provides a kind of interference that is not subjected to the transmission signal that the mobile phone in the above-mentioned conversation exports, and receiving sensitivity good electron tuner.
Electronic tuning unit of the present invention is provided with: insert TV with between input terminal and the 1st filter, Current Control with Control current value is with the 1st high-frequency amplifier of importing; And insert the output of the 1st high-frequency amplifier and described Current Control with between the input and detection of transmitted signals control the current control division of the electric current of described the 1st high-frequency amplifier, be detected the electric current that increases described the 1st high-frequency amplifier in the process that sends described transmission signal at mobile phone.
In addition, electronic tuning unit of the present invention is provided with: insert TV with between input terminal and the 1st filter and the Current Control with Control current value with the 1st high-frequency amplifier of importing; Input sends the transmission signal input terminal of the part of signal; Detect this transmission signal and offer the current control division of described Current Control, be detected the electric current that increases described the 1st high-frequency amplifier in the process that sends described transmission signal at mobile phone with input with the part of the described transmission signal of input terminal output and with current controling signal.
Can utilize the current control division that detects the transmission signal that is in the mobile phone in the conversation that the current value of the 1st high-frequency amplifier is increased, so can not be subjected to the interference of mobile phone by carrying out like this.
And, owing between TV is with input terminal and the 1st filter, insert the 1st high-frequency amplifier, so can improve the receiving sensitivity that decreases.
In addition since under the situation of not using mobile phone, the current settings of the 1st high-frequency amplifier is got less, so can reduce power consumption.
Description of drawings
Fig. 1 is the block diagram of the portable telephone device of embodiment of the present invention 1.
Fig. 2 is illustrated to be relation between the transmission signal of television broadcasting signal and mobile phone in the portable telephone device of embodiment of the present invention 1.
Fig. 3 A is with respect to the performance plot of the magnification ratio of electric current in the portable telephone device of embodiment of the present invention 1.
Fig. 3 B is with respect to the performance plot of the noise figure of electric current in the portable telephone device of embodiment of the present invention 1.
Fig. 3 C is with respect to the performance plot of the V (P1dB) of electric current in the portable telephone device of embodiment of the present invention 1.
Fig. 4 is with respect to the performance plot of the electronic tuning unit dislocation rate of incoming signal level in the portable telephone device of embodiment of the present invention 1.
Fig. 5 is the circuit diagram of the 1st filter in the portable telephone device of embodiment of the present invention 1.
Fig. 6 is the selectivity characteristic figure of the 1st filter in the portable telephone device of embodiment of the present invention 1.
Fig. 7 A is the time diagram that sends signal in the portable telephone device of embodiment of the present invention 1.
Fig. 7 B is the time diagram of current controling signal in the portable telephone device of embodiment of the present invention 1.
Fig. 8 is the block diagram of the portable telephone device of embodiment of the present invention 2.
Fig. 9 is the circuit diagram that adopts the extraction circuit of directional coupler in the portable telephone device of embodiment of the present invention 2.
Figure 10 is the circuit diagram that adopts the extraction circuit of power divider in the portable telephone device of embodiment of the present invention 2.
Figure 11 is the block diagram of the portable telephone device of embodiment of the present invention 3.
Figure 12 is the block diagram of transmission circuit in the portable telephone device of embodiment of the present invention 3.
Figure 13 is the circuit diagram of testing circuit in the portable telephone device of embodiment of the present invention 3.
Figure 14 A is the time diagram that sends signal in the portable telephone device of embodiment of the present invention 3.
Figure 14 B is the time diagram of current controling signal in the portable telephone device of embodiment of the present invention 3.
Figure 15 is the block diagram of the portable telephone device of embodiment of the present invention 4.
Figure 16 is the block diagram of transmission circuit in the portable telephone device of embodiment of the present invention 4.
Figure 17 is the block diagram of the portable telephone device of embodiment of the present invention 5.
Figure 18 is the block diagram of prior mobile phone device.
Embodiment
(execution mode 1)
Fig. 1 is the block diagram of the portable telephone device of embodiment of the present invention 1.Among Fig. 1, portable telephone device 20 is constituted with the mobile phone 23 that antenna 24 is connected with the electronic tuning unit 22 of the television broadcasting signal (VHF broadcast singal, UHF broadcast singal) of antenna 21 outputs and with mobile phone by receiving TV.
The following electronic tuning unit 22 of explanation earlier.This electronic tuning unit 22 comprises following formation: the TV that is connected with antenna 21 with TV is with input terminal 25; The high-frequency amplifier 26 that is connected and is provided with the Current Control usefulness input 26a that can carry out current value control with this TV with input terminal 25; Connecting the output of this high-frequency amplifier 26 and suppressing 1st filter 27 of television broadcasting signal with external signal; Connect the output of the 1st filter 27 and be provided with the high-frequency amplifier 29 that the gain controlling that can carry out gain controlling is used input 29a; Wherein end input is connected the blender 32 that its other end input then is connected with the output of oscillator 30 with the output of this high-frequency amplifier 29; The filter 33 that is connecting the output of this blender 32 and allowing intermediate-freuqncy signal pass through; The TV demodulator circuit 34 that is connecting the output of this filter 33; The TV lead-out terminal 35 of this TV with TS (transport stream) signal of demodulator circuit 34 outputs is provided; Oscillator 30 is carried out the PLL control circuit 36 of PLL control; The input and output terminal 23a of the transmission signal of mobile phone 23 is provided; The 3rd filter 38 that is connected with the output of high-frequency amplifier 26 and allows transmission signal from mobile phone 23 pass through; Connecting the output of the 3rd filter 38 and the testing circuit 40 of detection of transmitted signals; And the output and the Current Control that are connected in this testing circuit 40 are used between the input 26a and the current control circuit 41 of the current value of control high-frequency amplifier 26.
Wherein, current control division 42 is made of the 3rd filter 38, testing circuit 40, current control circuit 41.In addition, the output of blender 32 is connected with the input of gain control circuit 44.The output of this gain control circuit 44 is connected with input 29a with gain controlling.
The 3rd filter 38 begins to be connected with capacitor 38c, inductor 38d in turn towards lead-out terminal 38b from input terminal 38a.
The action of the electronic tuning unit 22 of above-mentioned formation now is described.The television broadcasting signal input high-frequency amplifier 26 that antenna 21 receives.Input suppresses the 1st filter 27 of the transmission signal that mobile phone exports from the output signal of this high-frequency amplifier 26.
After carrying out gain controlling from the output signal of the 1st filter 27 by high-frequency amplifier 29, offer the end input of blender 32, input then provides the output signal of oscillator 30 to the other end.
Intermediate-freuqncy signal from for example 57MHz of this blender 32 outputs suppresses institute's signal of wanting interference signal in addition by filter 33.In addition, oscillator 30 can utilize the control signal control frequency that PLL control circuit 36 is exported.
In addition, the gain-controlled voltage from gain control circuit 44 outputs offers the gain controlling of high-frequency amplifier 29 with importing 29a.By like this, the output signal of blender 32 is carried out gain controlling make it to become fixing level.
The output of filter 33 also can be provided the input of gain control circuit 44 in addition.In this case, can utilize the interference signal of filter 33 inhibition transmission signals or adjacent channel etc., so can reduce of the influence of above-mentioned interference signal to gain controlling.
The output signal of blender 32 is imported TV demodulator circuit 34 after utilizing 33 pairs of interference signals of filter fully to suppress.The TS signal that this TV is exported with demodulator circuit 34 is exported with lead-out terminal 35 from TV.
As mentioned above, inputing to TV uses the television broadcasting signal of input terminal 25 to amplify in high-frequency amplifier 26, in high-frequency amplifier 29, carry out gain controlling, by blender 32 conversion frequencies, and will suppress to send the signal input TV demodulator circuit 34 of signal or interference signal through the 1st filter 27, filter 33.So, export with lead-out terminal 35 from TV with the TS signal of demodulator circuit 34 demodulation through TV.
The following describes mobile phone 23.This mobile phone 23 comprises following formation: be connected with the input and output terminal 23a of mobile phone with antenna 24; The transmission circuit 43 that is connected with this input and output terminal 23a; Connecting the lead-out terminal 43b of this transmission circuit 43 and TV respectively with the output of demodulator circuit 34 and the decoding circuit 46 that input signal is decoded; The image displaying part 47 and the audio output unit 48 that are connecting the output of this decoding circuit 46; The voice data input part 49 of input audio data signal; The encoder 50 that is connected between the input terminal 43c of this voice data input part 49 and transmission circuit 43 and audio data signal is encoded; And the control part 52 of control transmission circuit 43 and PLL control circuit 36.
The action of the mobile phone 23 of above-mentioned formation now is described.According to the control signal from control part 52, mobile phone 23 is in talking state.By like this, export with antenna 24 from mobile phone from the transmission signal that the transmission circuit 43 of mobile phone 23 is exported.
Fig. 2 is illustrated to be relation between the transmission signal of television broadcasting signal in the portable telephone device of embodiment of the present invention 1 and mobile phone.Transverse axis 61 is frequency (MHz), and the longitudinal axis 62 is level (dBm).Among Fig. 2, VHF broadcast singal 65 has 90MHz～220MHz frequency range.UHF broadcast singal 66 has 470MHz～770MHz frequency range.
From the transmission signal 67,68,69 of transmission circuit 43 output of mobile phone 23, for example adopt in Japan PDC mode also to have input and output terminal 23a to be in+situation of 28dBm level.The transmission signal Vtx that exports from this input and output terminal 23a uses antenna 24 to export propagation aloft from mobile phone, and is set near mobile phone antenna 24 television receptions antenna 21 receptions.
And send an example of the signal that signal 68,69 exports for the transtation mission circuit that utilizes the mobile phone of different frequency bands respectively, be respectively 1.5GHz and 1.9GHz frequency.These frequencies are fully away from the frequency of UHF broadcast singal 66, so influence is very little.
But TV is installed on the small-sized portable telephone device 20 with antenna 24 with antenna 21 and mobile phone, thus TV with antenna 21 and mobile phone with guaranteeing enough distances aspect the high frequency between the antenna 24.
Therefore, can be by using antenna 21 to receive by TV in the air from mobile phone with the transmission signal of antenna 24 outputs.Here suppose that mobile phone is for example 30dB with antenna 24 to TV with the isolation Viso of antenna 21.
This TV with the transmission signal Vu that antenna 21 receives according to (formula 1) is-2dBm.
Vu＝Vtx-Viso
＝+28dBm-30dB
=-2dBm... (formula 1)
Wherein, Vtx is the transmission signal level of input and output terminal 23a output, and Viso is mobile phone is used antenna 21 to TV with antenna 24 a isolation.
This transmission signal Vu inputs to TV demodulator circuit 34 after suppressing through the 1st filter 27, filter 33.But the 1st filter 27 can't fully suppress to send signal.This transmission signal just inputs to blender 32 by high- frequency amplifier 26,29 amplifications.Therefore, the easiest generation sends the distortion that signal caused in the blender 32, and the jamming performance of electronic tuning unit 22 almost sends signal Vu by this and determines.
In order to suppress the interference in the blender 32, the transmission signal of the 1st filter 27 is suppressed to become important.The following describes the required rejection ratio S1 of transmission signal at the 1st filter 27.
Make the incoming level V (P1dB) of blender 32 be-40dm.In addition, so-called V (P1dB) is-1dB, incoming signal level that output signal level is saturated with respect to the increase output signal level of incoming signal level.
The 1st filter 27 required rejection ratio S1 that insert these blender 32 primes are 68dB, about 70dB according to (formula 2).In addition, the power gain G1 that establishes high-frequency amplifier 26 is+15dB for the power gain G2 of+15dB, high-frequency amplifier 29.
S1＝Vu+G1+G2-V(P1dB)
＝-2dBn+15dB+15dB-(-40dBm)
=68dB... (formula 2)
Wherein, G1 represents the power gain (dB) of high-frequency amplifier 26, and G2 represents the power gain (dB) of high-frequency amplifier 29.In addition, the incoming level (dBm) of V (P1dB) expression blender 32.
But the interval 70 between the highest channel (62ch) of this transmission signal 67 and UHF broadcast singal 66 is near 60MHz.
The following describes and to improve based on the interference characteristic of this transmission signal with based on the electronic tuning unit 22 of these two kinds of performances of receiving sensitivity of filter loss.
Earlier the method for improving receiving sensitivity is described with Fig. 1.In the portable telephone device of embodiment of the present invention 1, between TV is with input terminal 25 and the 1st filter 27, insert middle power-type high-frequency amplifier 26 with good noise figure and distorted characteristic.
Like this, just can alleviate the insertion loss that the 1st filter 27 is caused by before the 1st filter 27, inserting high-frequency amplifier 26.Promptly can improve receiving sensitivity.
The method of the interference that the transmission signal that improves high-frequency amplifier 26 is caused is described with Fig. 3 A～Fig. 3 C, Fig. 4 below.
Insert the 1st filter 27 by in the high-frequency amplifier 26 of TV with antenna 21 1 sides, owing to the transmission signal of the mobile phone 23 that is in use disturbs.In order to improve this interference, high-frequency amplifier 26 adopts the middle power type semiconductor element with good distorted characteristic shown in Fig. 3 A～Fig. 3 C.
Fig. 3 A is with respect to the performance plot of the magnification ratio of electric current in the portable telephone device of embodiment of the present invention 1.Among Fig. 3 A, expression is with respect to the magnification ratio 92 of electric current 91, dots the magnification ratio 7b of existing high-frequency amplifier 7 (with reference to Figure 18) respectively, represents the magnification ratio 26b of high-frequency amplifier 26 of the present invention with solid line.
Fig. 3 B is with respect to the performance plot of the noise figure of electric current in the portable telephone device of embodiment of the present invention 1.Among Fig. 3 B, expression is with respect to the noise figure 93 of electric current 91, dots the noise figure 7c of existing high-frequency amplifier 7 respectively, represents the noise figure 26c of high-frequency amplifier 26 of the present invention with solid line.
Fig. 3 C is with respect to the performance plot of the V (P1dB) of electric current in the portable telephone device of embodiment of the present invention 1.Among Fig. 3 C, expression dots V (P1dB) 7d of existing high-frequency amplifier 7 with respect to the V (P1dB) 94 of electric current 91, represents V (P1dB) 26d of high-frequency amplifier 26 of the present invention with solid line.
Among Fig. 3 A～Fig. 3 C, existing high-frequency amplifier 7 is the semiconductor element of maximum rated 20mA, and the current settings that reality is used is used as current value 101 (8mA).Especially shown in Fig. 3 C, still be V (P1dB) 94a even if existing high-frequency amplifier 7 increases current value 101a (15mA), the improvement degree is less.
In contrast, high-frequency amplifier of the present invention 26 its maximum rated be 100mA, the electric current that reality is used can be set at current value 101 (8mA) respectively or current value 102 (40mA) uses.Especially under the situation with current value 102 (40mA) use, can improve V (P1dB) 94b significantly.
In addition, in the high-frequency amplifier 26 of the present invention, the magnification ratio during current value 102 (40mA), noise figure magnification ratio, the noise figure during with current value 101 (8mA) compared, almost equal variation not.
Fig. 4 is with respect to the performance plot of the dislocation rate of the electronic tuning unit of incoming signal level in the portable telephone device of embodiment of the present invention 1.Specifically, expression is that to adopt in the electronic tuning unit 22 of this high-frequency amplifier 26 receiving quality of the electronic tuning unit 22 of the transmission signal level of being imported with input terminal 25 with respect to TV 105 be BER (dislocation rate) 106.And, dot the BER 107 of electronic tuning unit of the current value 101 (8mA) of this high-frequency amplifier 26, represent the BER 108 of electronic tuning unit of the current value 102 (40mA) of this high-frequency amplifier 26 with solid line.
Among Fig. 4, BER 107 (dotted line) its BER variation under greater than the situation that sends signal level 105a.But BER 108 (solid line), even if greater than the transmission signal level 105b that sends signal level 105a, BER is variation not also.
Like this, the middle power type semiconductor element that will have good distorted characteristic is used for high-frequency amplifier 26, send signal level greater than the situation that sends signal level 105a under, utilize the current control division 42 must be bigger with the current settings of high-frequency amplifier 26.Thus, high-frequency amplifier 26 does not impair noise figure, can improve V (P1dB) significantly.Can be by eliminating the distortion of high-frequency amplifier 26 like this.
In addition, sending under the situation of signal level less than transmission signal level 105a, reducing the electric current of high-frequency amplifier 26.Thus, can reduce power consumption under the situation in not being in conversation.
Fig. 5 is the circuit diagram of the 1st filter in the portable telephone device of embodiment of the present invention 1.Among Fig. 5, as an example, the 1st filter 27 adopts the notch filter mode that characteristic frequency is removed.The 1st filter 27 has input terminal 27a, lead-out terminal 27b.Be connected in series with the body 73 that is connected in parallel of be connected in parallel body 72 and inductor 73a and the capacitor 73b of inductor 72a and capacitor 72b successively from this input terminal 27a to lead-out terminal 27b.In addition, be connected in parallel body 72,73 between the two tie point and ground connection between be connected with the body 75 that is connected in series of inductor 75a and capacitor 75b.
Here, the series resonance frequency of the parallel resonance frequency of the body 72,73 that is connected in parallel and the body 75 that is connected in series is made as near the 830MHz, and makes near this 830MHz frequency decay.
Fig. 6 is the selectivity characteristic figure of the 1st filter in the portable telephone device of embodiment of the present invention 1.Transverse axis 79 is frequency (MHz), and the longitudinal axis 80 is attenuation (dB).Among Fig. 6, expressing to the highest channel of UHF broadcast singal 66 (with reference to Fig. 2) is the smooth basically characteristic of frequency 83 of 770MHz.And the frequency 84 that sends the 830MHz that exists as interference signal of signal 67 (with reference to Fig. 2) can obtain about 70dB or above bigger attenuation.
Can suppress the caused interference of transmission signal in high-frequency amplifier 29, the blender 32 by adopting the 1st filter 27 of above-mentioned formation.
The following describes detection of transmitted signals, and control the current control division 42 of the current value of high-frequency amplifier 26 according to this detected result.
Among Fig. 1,, amplify, offer the input terminal 38a of the 3rd filter 38 by high-frequency amplifier 26 from the transmission signal of transmission circuit 43.The 3rd filter 38 is made of the series resonant circuit of capacitor 38c that connects successively from input terminal 38a to lead-out terminal 38b and inductor 38d, and this series resonance frequency is almost consistent with the frequency 830MHz that sends signal.
The negative electrode of the lead-out terminal 38b tie geophone 40a of the 3rd filter 38 is connected the anode of wave detector 40a with ground connection.Thus, the transmission signal by the 3rd filter 38 is by wave detector 40a detection.The voltage of this process detection averages processing by the integrating circuit that resistance 40b and capacitor 40c are formed.This resistance 40b is set at for example 500 Ω according to the relation of itself and response time.
The end of this 500 Ω resistance 40b and capacitor 38c are connected with tie point between inductor 38d.Can prevent that thus the high-frequency signal of importing wave detector 40a from promptly sending signal attenuation.So, can obtain enough detecting circuits among the wave detector 40a.
The situation that connects resistance 40b between the input of existing illustrative examples such as lead-out terminal 38b and current control circuit 41.The series resonance frequency of capacitor 38c and inductor 38d conforms to the frequency that sends signal.Therefore, lead-out terminal 38b can directly decay because of resistance 40b at the frequency place that sends signal.Therefore, can impair detecting circuit.
Like this, the voltage to capacitor 40c charging offers current control circuit 41.The output of this current control circuit 41 offers the Current Control of high-frequency amplifier 26 with importing 26a.
For example send under the situation of signal existence, it is big that the charging voltage of capacitor 40c becomes, and sets the current value of high-frequency amplifier 26 bigger.In addition, send that signal does not exist or less situation under, the charging voltage of capacitor 40c diminishes, and can set the current value of high-frequency amplifier 26 less.
As mentioned above, detect under the situation that sends signal, utilize current control division 42 that the electric current of high-frequency amplifier 26 is increased.Thus, even if being in the conversation, mobile phone 23 also can carry out television reception.In addition, send that signal does not have or less situation under, reduce the electric current of high-frequency amplifier 26.Thus, under situation about not being in the conversation, can reduce power consumption.
Fig. 7 A is the time diagram of the transmission signal in the portable telephone device of embodiment of the present invention 1.Among Fig. 7 A, the transmission signal of GSM mode is that burst signal 113 exists signal 113b after signal 113a, and then has same signal to send over continuously.
110c is for example 4600usec during till from the time started 110a of this signal 113a to the time started 110b of signal 113b.In addition, 110e is for example 570usec during till from time 110a that signal 113a begins to the time 110d that finishes.
It is output level 111a at time 110a that this signal 113a can be set at it by stages, further increase at time 110f to output level 111b, and be final output level 111c at time 110g.This signal 113a that sets stage by stage for the follow-up signal of signal 113b or this signal 113b too.
Like this, the output level of signal 113a, 113b can be set stage by stage.It the reasons are as follows that face is described.Specifically, this is because being located at the power amplifier of the transtation mission circuit of transmission circuit 43 is made of multistage, and is controlled to be the action that begins these multi-stage power amplifiers successively.
Thus, can suppress to be in the rapid load variations that power amplifier caused in the transmission circuit 43 for oscillator.So, can reduce the variation of the frequency of oscillation of this oscillator.
The following describes the current controling signal 114 that current control division 42 is exported.Sending signal is that burst signal 113 offers testing circuit 40 from input terminal 38a.Utilize the wave detector 40a of this testing circuit 40, the voltage after detection averages processing by the integrating circuit that resistance 40b and capacitor 40c are formed to voltage.Signal through such average treatment offers current control circuit 41.
Fig. 7 B is the time diagram of the current controling signal in the portable telephone device of embodiment of the present invention 1.Among Fig. 7 B, the time 110a of the current controling signal 114a that current control circuit 41 is exported till the time 110h that rises during 110i set forr a short time than 110j during till from time 110a to time 110f.In addition, among this current controling signal 114a during 110i and during pass between the 110j tie up among the current controling signal 114b too.
For instance, during 110j be 10usec, during 110i need be set at 10usec or following.Therefore, the capacitance with capacitor 40c is set at 10nF for instance, and the resistance value of resistance 40b is set at 500 Ω.
During this period 110i is shown in (formula 3), roughly determined by the time constant C * R based on the capacitance C of the resistance value R of resistance 40b and capacitor 40c.
Time constant 110i=C * R
＝10×10
-9×500
=5usec... (formula 3)
In the formula, C represents the capacitance (F) of capacitor 40c, and R represents the resistance value (R) of resistance 40b.
110i is roughly 5usec during can making thus.
In addition, in the time of the signal except that signal 113a, 113b not, the charging voltage of capacitor 40c is carried out the short time discharge according to the load of current control circuit 41.Specifically, burst signal 113 descends among the time 110d, and current controling signal 114 can be 0V among the time 110m.
By carrying out like this, the rise time 110h of current controling signal 114a can detect the output level 111a of initial rising, rises in the 110j between the rising stage of burst signal 113a.In addition, current controling signal 114a fall time 110m by 110d decision fall time of burst signal 113a.This current controling signal 114a for the corresponding current controling signal 114b of burst signal 113b too.
By carrying out like this, can be used to current controling signal 114 from current control division 42, with have send signal during 111e corresponding during the current value of high-frequency amplifier 26 to be set at 40mA among the 111n big like this, with do not send signal during 111f corresponding during then the current value of high-frequency amplifier 26 to be set at 8mA among the 111p so little.In addition, 111p is set at the time of 110m fall time till the rise time 110k of current controling signal 114b from current controling signal 114a during.
As mentioned above, become output level 111b from the output level 111a of burst signal 113a before, available current control signal 114 is set the current value of high-frequency amplifier 26 bigger.Therefore, high-frequency amplifier 26 can suppress the distortion that signal 113a is caused.In addition and since can only during 111n (570usec) set current value bigger, so can reduce power consumption significantly.
In addition, the rise time 110h of current controling signal 114a also can rise time 110g for signal 113a before.
By carrying out like this, detecting under the situation that sends signal, utilize current control division 42 that the electric current of high-frequency amplifier 26 is increased.Thus, even if mobile phone 23 is in the communication process, high-frequency amplifier 26 also is unlikely to because of sending signal distortion to take place, so can carry out high-quality television reception.
And, owing between TV is with input terminal 25 and the 1st filter 27, insert high-frequency amplifier 26, thereby can improve the degree of deterioration of receiving sensitivity.
In addition, send that signal does not have or less situation under, reduce the electric current of high-frequency amplifier 26.Thus, under situation about not being in the conversation, can reduce power consumption.
In addition, also can between TV is with input terminal 25 and high-frequency amplifier 26, insert the 2nd filter (not shown).The 2nd filter configuration be for can suppress to send signal 20～30dB, and is set at less than the 1st filter 27 at the amount of suppression that sends signal.
In addition, for instance, the further miniaturization of portable telephone device is handled, mobile phone with antenna 24 to TV with the isolation Viso of antenna 21 just worse and worse.In this case, also can utilize the 2nd filter to suppress to send signal 20～30dB.So, be unlikely to impair receiving sensitivity, can realize the size portable telephone device of miniaturization more.
(execution mode 2)
Fig. 8 is the block diagram of the portable telephone device of embodiment of the present invention 2.Among Fig. 8, in the portable telephone device 420 of present embodiment 2, current control division 442 is inserted in high-frequency amplifier 39 between filter 438 and the testing circuit 40.In addition, also be, insert between the input of the input of the output of high-frequency amplifiers 26 and the 1st filter 27 and current control division 442 extracting circuit 437 with the portable telephone device situation difference of present embodiment 1.In addition, to the part mark same numeral identical with execution mode 1, its explanation is omitted.
Portable telephone device 420 is made of electronic tuning unit 422 and mobile phone 23.The output of these electronic tuning unit 422 medium-high frequency amplifiers 26 is connecting the input terminal 437a that extracts circuit 437.The lead-out terminal 437b that extracts circuit 437 is then connecting the input terminal 27a of the 1st filter 27.
In addition, the lead-out terminal 437c of extraction circuit 437 is connecting the input terminal 438a of filter 438.The lead-out terminal 438b of this filter 438 is connecting the input of high-frequency amplifier 39.The output of this high-frequency amplifier 39 is connecting the input of testing circuit 40.The output of this testing circuit 40 is connecting the input of current control circuit 41.The output of this current control circuit 41 is connected with input 26a with the Current Control of high-frequency amplifier 26.
Fig. 9 is the circuit diagram that adopts the extraction circuit of directional coupler in the portable telephone device of embodiment of the present invention 2.Among Fig. 9, the input terminal 439a, lead-out terminal 439b, 439c that is located at directional coupler 439 is corresponding with input terminal 437a, lead-out terminal 437b, the 437c of extraction circuit 437 among Fig. 8 respectively.Has following formation between input terminal 439a and the lead-out terminal 439b: resonator 439d; By forming the resonator 439e of directional coupler near configuration with this resonator 439d; Be connected in the end of this resonator 439e and the resistance 439f of 50 Ω between the ground connection; And the lead-out terminal 439c that is connected with the other end of resonator 439e.In addition, resonator 439d, 439e preferably all have the length of wavelength of roughly λ/4 of UHF broadcast singal frequency.
As mentioned above, owing to utilize resonator 439d, 439e to form directional coupler, thereby can make input terminal 439a be reduced to roughly 0.5dB to the loss of lead-out terminal 439b.And the signal level of exporting from lead-out terminal 439c can reduce than little from the signal level of lead-out terminal 439b output.In addition, lead-out terminal 439c is increased to the isolation of lead-out terminal 439b and be 20dB roughly.
Figure 10 is the circuit diagram that adopts the extraction circuit of power divider in the portable telephone device of embodiment of the present invention 2.Among Figure 10, the input terminal 440a, lead-out terminal 440b, the 440c that are located at power divider 440 are corresponding with the input terminal 437a, lead-out terminal 437b, the 437c that extract circuit 437 respectively.Be connected with inductor 440d between input terminal 440a and the lead-out terminal 440b.Be connected with inductor 440e between input terminal 440a and the lead-out terminal 440c.Be connected with capacitor 440f between input terminal 440a and the ground connection.Be connected with capacitor 440g and resistance 440h between lead-out terminal 440b, the 440c.The inductance of inductor 440d is 12nH roughly.The inductance of inductor 440e is 12nH roughly.The capacitance of capacitor 440f is 3pF roughly.The capacitance of capacitor 440g is 6pF roughly.The resistance value of resistance 440h is 100 Ω roughly.
By carrying out like this, be divided into two by power divider 440 from the signal of input terminal 440a and export from lead-out terminal 440b, 440c.Can obtain roughly this bigger isolation of 20dB between this lead-out terminal 440b, 440c.
Like this, just, can utilize high-frequency amplifier 39, directional coupler 439 or power divider 440 fully to guarantee the isolation of the input terminal 27a of testing circuit 40 to the 1st filters 27.So,, can prevent that still this UHF broadcast singal inflow to the input of the 1st filter 27 from being holding wire even if nonlinear distortion composition and UHF broadcast singal in the detecting circuit 40 that bigger transmission signal is caused are overlapping.Therefore,, also be unlikely to produce and disturb, can carry out high-quality television reception even if mobile phone 23 is in the conversation.
In addition, because guarantee the isolation of the input terminal 27a of testing circuit 40 to the 1st filters 27, so need not extract circuit 437 but between the tie point of the input terminal 27a of the output of high-frequency amplifier 26 and the 1st filter 27 and testing circuit 40, insert isolator, also can obtain same effect.
(execution mode 3)
Figure 11 is the block diagram of the portable telephone device of embodiment of the present invention 3.Among Figure 11, portable telephone device 120 has following formation: receive from the electronic tuning unit 122 of TV with the television broadcasting signal (VHF broadcast singal, UHF broadcast singal) of antenna 21; And the mobile phone 123 that is connected with antenna 24 with mobile phone.In addition, to the part mark same numeral identical with execution mode 1, its explanation is omitted.
The following electronic tuning unit 122 of explanation earlier.This electronic tuning unit 122 comprises following formation: the TV that is connected with antenna 21 with TV is with input terminal 25; Be connected with input terminal 25 with this TV and be provided with the Current Control that to control current value high-frequency amplifier 26 with input 26a; Connecting the output of this high-frequency amplifier 26 and suppressing 1st filter 27 of television broadcasting signal with external signal; Connect the output of the 1st filter 27 and be provided with the high-frequency amplifier 29 that the gain controlling that can carry out gain controlling is used input 29a; Wherein end input is connecting the output of this high-frequency amplifier 29, the blender 32 that the input of the face other end is then connecting the output of oscillator 30; The filter 33 that is connecting the output of this blender 32 and allowing intermediate-freuqncy signal pass through; The TV demodulator circuit 34 that is connecting the output of this filter 33; Provide from the TV lead-out terminal 35 of this TV with TS (transport stream) signal of demodulator circuit 34 outputs; Oscillator 30 is carried out the PLL control circuit 36 of PLL control; The transmission signal input terminal 22a of a part of the transmission signal of mobile phone 23 is provided; Provide from this transmission signal with the transmission signal of input terminal 22a and detect the testing circuit 140 of this transmission signal from input terminal 140a; And the lead-out terminal 140b and the Current Control that are connected in this testing circuit 140 are used between the input 26a and the current control circuit 41 of the current value of control high-frequency amplifier 26.
Here, current control division 142 is made of testing circuit 140 and current control circuit 41.And the output of blender 32 is connected with the input of gain control circuit 44.The output of this gain control circuit 44 is connected with input 29a with gain controlling.
The following describes the action of the electronic tuning unit 122 that constitutes as mentioned above.The television broadcasting signal that antenna 21 receives inputs to high-frequency amplifier 26.Input to the 1st filter 27 that suppresses the transmission signal that mobile phone exports from the output signal of this high-frequency amplifier 26.
Should be undertaken offering wherein end input of blender 32, and the output signal of oscillator 30 being offered the other end input of blender 32 after the gain controlling by high-frequency amplifier 29 from the output signal of the 1st filter 27.
Interference signal from the intermediate-freuqncy signal of for example 57MHz of this blender 32 outputs is suppressed desired signals by filter 33 beyond.And, the control signal control frequency that oscillator 30 can utilize PLL control circuit 36 to be exported.
In addition, the gain-controlled voltage that gain control circuit 44 is exported, the gain controlling that offers high-frequency amplifier 29 is with importing 29a.Thus, can carry out that gain controlling makes it to the output signal of blender 32 is a fixing level.
The output of filter 33 also can be provided to the input of gain control circuit 44 in addition.In this case, can utilize the interference signal of filter 33 inhibition transmission signals or adjacent channel etc., so can reduce of the influence of above-mentioned interference signal to gain controlling.
And the output signal of blender 33 inputs to TV demodulator circuit 34 after utilizing 33 pairs of interference signals of filter fully to suppress.Export with lead-out terminal 35 by TV with the TS signal of demodulator circuit 34 outputs from this TV.
As mentioned above, input to the television broadcasting signal of TV with input terminal 25, in high-frequency amplifier 26, amplify, in high-frequency amplifier 29, carry out gain controlling, utilize blender 32 conversion frequencies, and will input to TV through the signal that the 1st filter 27, filter 33 have suppressed to send signal or interference signal with demodulator circuit 34.And, can export through the TS signal of TVs with lead-out terminal 35 from TV with demodulator circuit 34 demodulation.
The following describes mobile phone 123.This mobile phone 123 comprises following formation: be connected with the input and output terminal 23a of mobile phone with antenna 24; The transmission circuit 43 that is connecting this input and output terminal 23a by input and output terminal 43a; Connecting respectively the lead-out terminal 43b of this transmission circuit 43 and TV with the TV of demodulator circuit 34 with lead-out terminal 35 and decoding circuit 46 that input signal is decoded; Respectively with the image displaying part 47 and the audio output unit 48 that are connected from the output of the image of this decoding circuit 46, voice output; The voice data input part 49 of input audio data signal; The coding circuit 50 that is connected between the input terminal 43c of this voice data input part 49 and transmission circuit 143 and audio data signal is encoded; And the control part 52 of control transmission circuit 143 and PLL control circuit 36.
In addition, being arranged at the lead-out terminal 143d that output on the transmission circuit 143 sends the part of signal is connected with input terminal 22a with the transmission signal.
The following describes the action of the mobile phone 132 that constitutes as mentioned above.Can be used to make mobile phone 123 be in talking state from the control signal of control part 52.Thus, the transmission signal of exporting from the transmission circuit 143 of mobile phone 123 can be exported with antenna 24 from mobile phone.
Figure 12 is the block diagram of the transmission circuit in the portable telephone device of embodiment of the present invention 3.Among Figure 12, mobile phone 123 used transmission circuits 143 are provided with: the input and output terminal 43a that is connected with input and output terminal 23a; Decoding circuit 46 is provided the lead-out terminal 43b of decoded signal; Input terminal 43c from the signal of coding circuit 50 is provided; Output sends the lead-out terminal 143d of the part of signal; And provide input terminal 43e from the control signal of control part 52.
And transmission circuit 143 comprises following formation: input and output terminal 43a is connected with the duplexer 263 of common terminal; Be connected in the receiving circuit 264 between these duplexer 263 one of them terminals and the lead-out terminal 43b; Be connected in the transtation mission circuit 266 between another terminal of input terminal 43c and duplexer 263; And provide from the control signal of input terminal 43e and the transmitting-receiving control circuit 276 of control receiving circuit 264 and transtation mission circuit 266.
Transmitting-receiving is with being provided with output 276a, 276b, 276c, 276d, 276e in the control circuit 276.
Supply voltage from output 276a output offers receiving circuit 264, and receiving circuit 264 is in accepting state.Supply voltage from output 276b output then offers transtation mission circuit 266, and transtation mission circuit 266 is in transmit status.Offer the control input of the power control part (not shown) of power amplifier 271 from the control voltage of exporting 276c output, this power amplifier 271 is in and amplifies the state that sends signal.In addition, the control voltage that should export 276c output certainly also can be exported with the control circuit (not shown) beyond the control circuit 276 by transmitting-receiving.Control signal from output 276d, 276e output offers oscillator (not shown), oscillator 269 in the receiving circuit 264, can determine frequency of oscillation separately.
In addition, transtation mission circuit 266 comprises following formation: wherein end input is connected with the blender 267 of input terminal 43c; The oscillator 269 that is connected with the other end input of this blender 267; The power amplifier 271 that is connecting the output of blender 267; Be connected in the resonator 273a between the another terminal of the output of this power amplifier 271 and duplexer 263; By forming the resonator 273b of directional coupler near configuration with this resonator 273a; Be connected in the wherein resistance 273c of 50 Ω between an end and the ground connection of this resonator 273b; The other end that is connected in resonator 273b is promptly exported the gain controlling gain control circuit of importing between the 271a 274 of 273d and power amplifier 271; And be connected in the output 273d of resonator 273b and the resistance 273e between the lead-out terminal 143d.
And, can utilize resonator 273a, 273b, resistance 273c to constitute directional coupler 273.
In addition, resonator 273a, 273b all have the roughly length of 1/4 wavelength with respect to sending signal.
In addition, resistance 273e also can insert between the input terminal 140a of lead-out terminal 143d and testing circuit 140.
Now with Figure 12 explanation action of the transmission circuit 143 of formation as mentioned above.Among Figure 12, transmission circuit 143 can be in transmit status or accepting state according to the control signal from input terminal 43e, and can determine the frequency of received signal or the frequency of transmission signal.
For instance, under accepting state, decode by receiving circuit 264 from the received signal of input and output terminal 43a, and export by lead-out terminal 43b.In addition, under transmit status, offer wherein end input of blender 267 from the code signal of input terminal 43c.The oscillator signal of oscillator 269 can be offered the other end input of this blender 267.
From 267 outputs of this blender be the transmission signal of upper frequency, input to power amplifier 271.Transmission signal by these power amplifier 271 outputs inputs to directional coupler 273.Transmission signal from these directional coupler 273 outputs is exported from input and output terminal 43a by duplexer 263.
In addition, extract the part of the transmission signal of being imported in the middle of the output 273d of directional coupler 273.The transmission signal that this extracted offers the input of gain control circuit 274.The gain controlling of the output signal input power amplifier 271 of this gain control circuit 274 is with importing 271a.Thus, power amplifier 271 makes that through gain controlling it is certain output level.
Transmission signal from these power amplifier 271 outputs inputs to directional coupler 273.Export a part that sends signal from the output 273d of this directional coupler 273, and export from lead-out terminal 143d.Part from the transmission signal of this output 273d output offers lead-out terminal 143d by resistance 273e.This lead-out terminal 143d is routed at the input terminal 140a of the testing circuit 140 of current control division 142 according to for example printed circuit pattern.
This printed circuit pattern has the equivalent capacity that produces between equivalent inductance and ground connection, so have the impedance variation with respect to frequency.This impedance variation can be utilized for example has that the resistance 273e of 4.7 Ω～100 Ω resistance values prevents.
The caused impedance variation of frequency between the output 273d of this resistance 273e directivity capable of being controlled coupler 273 and the input terminal 140a of testing circuit 140.So, can export the transmitted power of even level from the lead-out terminal 143d of transtation mission circuit 266.
Transmission signal from this lead-out terminal 143d output inputs to current control division 142.With Figure 13 action in this current control division 42 is described below.
Figure 13 is the circuit diagram of the testing circuit in the portable telephone device of embodiment of the present invention 3.Among Figure 13, testing circuit 240 is provided with input terminal 140a and lead-out terminal 140b.Be connected with resistance 240a between input terminal 140a and the lead-out terminal 140b.
In addition, be connected with wave detector 240b between input terminal 140a and the ground connection so that negative electrode is in input terminal 140a one side.Be connected with capacitor 240c between lead-out terminal 140b and the ground connection.
Offer the transmission signal of the input terminal 140a of this testing circuit 240, by wave detector 240b detection.The voltage of this process detection averages processing by the integrating circuit that resistance 240a and capacitor 240c are formed to voltage.The signal of this process average treatment offers current control circuit 41 by lead-out terminal 140b.
For instance, have under the situation about existing from the transmission signal of mobile phone 123, this sends signal by wave detector 240b detection, and is big thereby the charging voltage of capacitor 240c becomes.Utilize the current control circuit 41 of this big charging voltage of input, set the current value of high-frequency amplifier 26 bigger.
In addition, from the transmission signal of mobile phone 123 do not exist or less situation under, the charging voltage of capacitor 240c diminishes.Utilize the current control circuit 41 of this less charging voltage of input, set the current value of high-frequency amplifier 26 less.
By carrying out as mentioned above, detecting under the situation of the transmission signal of mobile phone 23, increase the electric current of high-frequency amplifiers 26 by current control division 42.Thus, even if mobile phone 23 is in the conversation, also can carry out television reception.In addition, from the transmission signal of mobile phone 23 do not have or less situation under, reduce the electric current of high-frequency amplifier 26.Thus, cpable of lowering power consumption under situation about not being in the conversation.And do not use under the situation of mobile phone 23, current control division 42 reduces the electric current of high-frequency amplifier 26.Cpable of lowering power consumption thus.
Figure 14 A is the time diagram of the transmission signal in the mobile phone of embodiment of the present invention 3.Among Figure 14 A, the transmission signal of GSM mode is that burst signal 113 exists signal 113b after signal 113a, further sends same signal continuously here.
110c is for example 4600usec during till from the time started 110a of this signal 113a to the time started 110b of signal 113b.In addition, 111e is for example 570usec during till from the time started 110a of signal 113a to the time 110d that finishes.
This signal 113a sets stage by stage, so that be output level 111a, further increase at time 110f and to be output level 111b at time 110a, and be final output level 111c at time 110g.This signal 113a that sets stage by stage for the follow-up signal of signal 113b or this signal 113b too.
Like this, the output level of signal 113a, 113b is set stage by stage.It the reasons are as follows that face is described.Specifically, this is because being located at the power amplifier of the transtation mission circuit of transmission circuit 43 is made of multistage, and is controlled to be the action that begins these multi-stage power amplifiers successively.
Thus, can suppress to be in the rapid load variations that power amplifier caused in the transmission circuit 43 for oscillator.So, can reduce the variation of this its frequency of oscillation of oscillator.
Figure 14 B is the time diagram of the current controling signal in the portable telephone device of embodiment of the present invention 3.Among Figure 14 B, current controling signal 114a, 114b are corresponding with burst signal 113a, 113b respectively, need to rise at short notice or descend.Rising in this short time can improve the distortion that the transmission signal in the high-frequency amplifier 26 is caused, and the decline in the short time can reduce the power consumption in the high-frequency amplifier 26.
Therefore, the rise time 110h of the current controling signal 114a time 110a that is set at burst signal 113a is during the time 110f in the 110j.This relation for current controling signal 114b and burst signal 113b too.In addition, time 110a is set at during the time 110h during 110i.
For instance, during 110j be 10usec, during 110i need be set at 10usec or following.Thus, for example capacitance of capacitor 240c is set at 10nF, the resistance value of resistance 240a is set at 500 Ω.
During this period 110i is shown in (formula 4), roughly determined by the time constant C * R based on the capacitance C of the resistance value R of resistance 240a and capacitor 240c.Thus can with during 110i be set at roughly 5usec.
Time constant 110i=C * R
＝10×10
-9×500
=5 μ sec... (formula 4)
In the formula, C represents the capacitance (F) of capacitor 240c, and R represents the resistance value (R) of resistance 240a.
In addition, in the time of no signal except that signal 113a, 113b, the charging voltage of capacitor 240c is just carried out the short time discharge according to the load of current control circuit 41.In addition, among this current controling signal 114a during 110i and during between 110j relation for current controling signal 114b too.
By carrying out like this, the rise time 110h of current controling signal 114a can detect the output level 111a of initial rising, and rises in the 110j between the rising stage of burst signal 113a.In addition, current controling signal 114a fall time 110m by 110d decision fall time of burst signal 113a.
Available this current controling signal 114a sets the current value of high-frequency amplifier 26 bigger.So can suppress the caused distortion of transmission signal of high-frequency amplifier 26.
This point for the corresponding current controling signal 114b of burst signal 113b too, the rise time 110k of current controling signal 114b can rise in the 110j between the initial rising stage of burst signal 113b.
By carrying out like this, can be used to current controling signal from current control division 142, with have send signal during 111e corresponding during the current value of high-frequency amplifier 26 can be set at 40mA among the 111n big like this, with do not send signal during 111f corresponding during then the current value of high-frequency amplifier 26 can be set at 8mA among the 111p so little.
In addition, 111p is set at the time of 110m fall time till the rise time 110k of current controling signal 114b from current controling signal 114a during.
In addition, the rise time 110h of current controling signal 114a also can be the time before the rise time 110g of signal 113a.
As mentioned above, the transmission signal from mobile phone 123 is that burst signal 113a, 113b are detected by testing circuit 140.Utilize the current control division 42 of this detected signal of input, must be bigger with the current settings of high-frequency amplifier 26.Thus, high-frequency amplifier 26 can suppress to send the caused distortion of signal, so even if mobile phone 23 is in the conversation, also can carry out high-quality television reception.
In addition, send that signal does not have or less situation under, get the current settings of high-frequency amplifier 26 less by current control division 142.Thereby, under situation about not being in the conversation, can reduce power consumption significantly.
In addition, TV is with inserting high-frequency amplifier 26 between input terminal 25 and the 1st filter 27.Therefore, the 1st filter 27 caused loss of signal do not take place, so can improve the degree of receiving sensitivity variation.
In addition, the level of the detection signal that lead-out terminal 140b exported of testing circuit 140 depends on the size of burst signal 113 and increases.Can be by the current value of current control circuit 41 according to the size control high-frequency amplifier 26 of this detection signal.Like this, can make the current value optimization of high-frequency amplifier 26 according to the burst signal level, thereby Control current effectively.
In addition, also can between TV is with input terminal 25 and high-frequency amplifier 26, insert the 2nd filter (not shown).The 2nd filter can send signal suppressing 20～30dB, and is set at less than the amount of suppression with respect to the transmission signal of the 1st filter 27 and uses.
For instance, portable telephone device further carries out miniaturization, mobile phone with antenna 24 to TV with the isolation Viso of antenna 21 just worse and worse.In this case, also can utilize the 2nd filter to suppress to send signal 20～30dB.So, under the unlikely situation that impairs receiving sensitivity, can realize the portable telephone device of the further miniaturization of size.
In addition, testing circuit 140 or current control division 142 also can be built in the mobile phone 123.Thus, send signal and be unlikely to leak in the electronic tuning unit 22, do not take place so send the caused interference of signal.
(execution mode 4)
Figure 15 is the block diagram of the portable telephone device of embodiment of the present invention 4.Figure 16 is the block diagram of the transmission circuit in the portable telephone device of embodiment of the present invention 4.
In the portable telephone device of embodiment of the present invention 3, the detection signal that inputs to current control circuit 41 is provided by the lead-out terminal 140b of testing circuit 140.Difference is therewith, in the portable telephone device 320 of present embodiment 4, and the supply voltage that directly provides transmitting-receiving to be exported to the input of current control circuit 41 as shown in figure 16 with the output 276b of control circuit 276.Supply voltage from this output 276b can make transtation mission circuit 366 be in operate condition.
The available supply voltage that offers this transtation mission circuit 366 is controlled the electric current of high-frequency amplifier 26.Therefore, be characterized in being unlikely to being subjected to the interference that back coupling caused, and wiring easily from the transmission signal of mobile phone 323.In addition, to the part mark same numeral identical with execution mode 3, its explanation is omitted.
Among Figure 15, portable telephone device 320 is made of electronic tuning unit 322 and mobile phone 323.Electronic tuning unit 322 is connected in current control circuit 41 Current Control of high-frequency amplifier 26 with between input 26a and the lead-out terminal 222a.
Among Figure 16, transmission circuit 343 is provided with: the input and output terminal 243a that is connected with input and output terminal 23a; Decoding circuit 46 is provided the lead-out terminal 243b of decoded signal; Input terminal 243c from the signal of coding circuit 50 is provided; Be connected and provide the input terminal 243e of control signal with transmitting-receiving with control circuit 276; And the lead-out terminal 343a that is connected with the output 276b of control circuit 276 with transmitting-receiving.
Offer receiving circuit 264 from the supply voltage of output 276a output, receiving circuit 264 is in accepting state.Offer transtation mission circuit 366 from the supply voltage of output 276b output, transtation mission circuit 366 is in transmit status.
Control signal from output 276d, 276e output offers oscillator (not shown), oscillator 269 in the receiving circuit 264, decision frequency of oscillation separately.
And directional coupler 273 is made of resonator 273a, 273b, resistance 273c.In addition, resonator 273a, 273b all have the roughly length of 1/4 wavelength with respect to sending signal.
In the transmission circuit 343, offer transmitting-receiving with control circuit 276 from the control signal of input terminal 243e.Offer the power supply input and output terminal 343a of transtation mission circuit 366 with the supply voltage of the output 276b output of control circuit 276 from this transmitting-receiving.In addition, this lead-out terminal 343a also can connect output 276c and substitutes and export 276b.
Supply voltage from this lead-out terminal 343a offers current control circuit 41.The output of this current control circuit 41 offers the Current Control of high-frequency amplifier 26 with importing 26a.
Identical with the situation of the execution mode 3 shown in Figure 14 A, Figure 14 B, the rise time 110h of current controling signal 114a in the execution mode 4 is roughly consistent with the rise time 110a of burst signal 113a, and fall time, 110m roughly conformed to 110d fall time of burst signal 113a.For current controling signal 114b and burst signal 113b too.
By carrying out as mentioned above, transtation mission circuit 366 is owing to being in transmit status from transmitting-receiving with the supply voltage of the output 276b of control circuit 276, and output transmission signal.Simultaneously, import 26a from the supply voltage of this output 276b by the Current Control usefulness that current control circuit 41 inputs to high-frequency amplifier 26, and set the current value of high-frequency amplifier 26 bigger.Thus, even if mobile phone 323 is in the conversation, high-frequency amplifier 26 also is unlikely to produce distortion because of sending signal, so can carry out high-quality television reception.
In addition, the transmission signal does not have or sends under the less situation of signal, and the electric current of high-frequency amplifier 26 is reduced.Thus, be not under the situation in the conversation and can reduce power consumption.
The portable telephone device 320 of Gou Chenging is also obtained the effect same with the portable telephone device 120 described in the execution mode 3 as mentioned above.In addition, even if being built in the mobile phone 323, current control circuit 41 also can obtain same effect.
(execution mode 5)
Figure 17 is the block diagram of the portable telephone device of embodiment of the present invention 5.
In the execution mode 3, input to the transmission signal of current control division 142, provide with input terminal 22a by sending signal by the lead-out terminal 143d of transmission circuit 143.In contrast, in the portable telephone device of embodiment of the present invention 5, send signal and be provided with pick-up antenna 521 with input terminal 22a.Can utilize this pick-up to receive and use the part of the transmission signal that transmission circuit 143 exported with antenna 521.In addition, to the part mark same numeral identical with execution mode 3, its explanation is omitted.
Among Figure 17, portable telephone device 520 is made of electronic tuning unit 122 and mobile phone 123.The transmission signal of electronic tuning unit 122 is connected with the pick-up antenna 521 that can receive a part that sends signal with input terminal 22a.Printed circuit pattern, microstrip line etc. can be used for this pick-up antenna 521.
In addition, pick-up can be provided for receiving the part of the transmission signal that portable antenna 24 exported with antenna 521.This pick-up requires to improve the receiving sensitivity at sending signal when being small-sized with antenna 521.
Can utilize following method to realize miniaturization and the receiving sensitivity of this pick-up simultaneously with antenna 521.
For instance, pick-up portable antenna 24 at least a portion configured in parallel wherein of sending signal with respect to output with the part of antenna 521.Thus, pick-up can stably receive transmission signal from portable antenna 24 with antenna 521.
In addition, pick-up is disposed with antenna 21 more close portable antennas 24 than TV with antenna 521 for instance.Thus, pick-up can receive transmission signal from portable antenna 24 in high sensitivity with antenna 21.
In addition, pick-up is to send roughly 1/4 of signal wavelength with the length setting of antenna 521 for instance.Thus, pick-up can receive transmission signal from portable antenna 24 in high sensitivity with antenna 521.In addition, this incoming level can reduce to realize the best by shortening the length of pick-up with antenna 521.
Carry out as mentioned above, mobile phone 123 is under the situation in the conversation, utilizes pick-up to receive a part that sends signals with antenna 521, by testing circuit 40 detections.Voltage after this detection is used by the Current Control of current control circuit 41 input high-frequency amplifiers 26 and is imported 26a, and sets the current value of high-frequency amplifier 26 bigger.
Thus, even if mobile phone 123 is in the conversation, high-frequency amplifier 26 is unlikely to produce distortion because of sending signal, so can carry out high-quality television reception.
In addition, the transmission signal does not have or sends under the less situation of signal, and the electric current of high-frequency amplifier 26 is reduced.Thus, be not under the situation in the conversation and can reduce power consumption.
The portable telephone device 520 of Gou Chenging is also obtained the effect same with the portable telephone device 120 described in the execution mode 3 as mentioned above.
Electronic tuning unit of the present invention even if mobile phone is in the conversation, also can not be subjected to the influence of this mobile phone and received tv broadcast signal, so can be used for being built in the electronic tuning unit of portable telephone device etc.
Claims (19)
1. an electronic tuning unit is built in the portable telephone device, it is characterized in that, described electronic tuning unit comprises:
The TV input terminal of input television broadcasting signal;
Prevention was from the 1st filter of the transmission signal of the mobile phone of described portable telephone device when the signal of importing described TV usefulness input terminal was provided;
Input provides the blender from the output of described the 1st filter to an end wherein;
The oscillator that is connected with the other end input of described blender;
The TV lead-out terminal of the output of described blender is provided;
Insert described TV with between input terminal and described the 1st filter, and have 1st high-frequency amplifier of the Current Control of Control current value with input; And
Control the current control division of the electric current of described the 1st high-frequency amplifier,
Described current control division is detected the electric current that increases described the 1st high-frequency amplifier in the process that sends described transmission signal at described mobile phone.
2. electronic tuning unit as claimed in claim 1 is characterized in that,
Described current control division inserts the output and the described Current Control of described the 1st high-frequency amplifier and uses between the input, and detects the electric current that described transmission signal is controlled described the 1st high-frequency amplifier.
3. electronic tuning unit as claimed in claim 2 is characterized in that,
Described current control division detects the electric current that the signal that rises at first in the middle of the described transmission signal that rises is stage by stage controlled described the 1st high-frequency amplifier.
4. electronic tuning unit as claimed in claim 2 is characterized in that,
Be to use in the electronic tuning unit of GSM mode portable telephone device,
Described current control division increases the electric current of described the 1st high-frequency amplifier in the time that the burst signal that has described mobile phone to send exists,
Then reduce the electric current of described the 1st high-frequency amplifier in the non-existent time in described burst signal.
5. electronic tuning unit as claimed in claim 2 is characterized in that,
Described the 1st filter is made of the notch filter that suppresses described transmission signal.
6. electronic tuning unit as claimed in claim 2 is characterized in that,
Further be included in 2nd filter of described TV with the described transmission signal of inhibition between the input of input terminal and described the 1st high-frequency amplifier,
Described the 2nd filter is set forr a short time for the amount of suppression of described transmission signal than described the 1st filter for the amount of suppression of described transmission signal.
7. electronic tuning unit as claimed in claim 2 is characterized in that,
Described current control division comprises:
The 3rd filter that allows described transmission signal pass through;
Detection is from the testing circuit of the described transmission signal of described the 3rd filter; And
Be connected in the output of described testing circuit and the Current Control of described the 1st high-frequency amplifier and use between the input, and control the current control circuit of the electric current of described the 1st high-frequency amplifier.
8. electronic tuning unit as claimed in claim 2 is characterized in that,
The extraction circuit of lead-out terminal of a part that further comprises between the input of the output of inserting described the 1st high-frequency amplifier and described the 1st filter and have the output signal of described the 1st high-frequency amplifier of output,
The described lead-out terminal of described extraction circuit is connected with the input of described current control division.
9. electronic tuning unit as claimed in claim 2 is characterized in that,
Further comprise between the input of the output of inserting described the 1st high-frequency amplifier and described the 1st filter and have and will distribute the power divider of lead-out terminal of signal output of the output signal of described the 1st high-frequency amplifier,
The described lead-out terminal of described power divider is connected with the input of described current control division.
10. electronic tuning unit as claimed in claim 1 is characterized in that,
The isolator of lead-out terminal of a part that further comprises between the input of the output of inserting described the 1st high-frequency amplifier and described the 1st filter and have the output signal of described the 1st high-frequency amplifier of output,
The described lead-out terminal of described isolator is connected with the input of described current control division.
11. electronic tuning unit as claimed in claim 1 is characterized in that,
The transmission signal input terminal that further comprises a part of importing described transmission signal,
Described current control division detects from the part of described transmission signal with the described transmission signal of input terminal, provides current controling signal to described Current Control with input simultaneously.
12. electronic tuning unit as claimed in claim 11 is characterized in that,
Described current control division detects the electric current that the signal that rises at first in the middle of the described transmission signal that rises is stage by stage controlled described the 1st high-frequency amplifier.
13. electronic tuning unit as claimed in claim 11 is characterized in that,
Be to use in the electronic tuning unit of GSM mode portable telephone device,
Described current control division increases the electric current of described the 1st high-frequency amplifier in the time that the burst signal that has described mobile phone to send exists,
Then reduce the electric current of described the 1st high-frequency amplifier in the non-existent time in described burst signal.
14. electronic tuning unit as claimed in claim 11 is characterized in that,
Described the 1st filter is made of the notch filter that suppresses described transmission signal.
15. electronic tuning unit as claimed in claim 11 is characterized in that,
Further be included in 2nd filter of described TV with the described transmission signal of inhibition between the input of input terminal and described the 1st high-frequency amplifier,
Described the 2nd filter is set forr a short time for the amount of suppression of described transmission signal than described the 1st filter for the amount of suppression of described transmission signal.
16. electronic tuning unit as claimed in claim 11 is characterized in that,
The described transmission signal of importing described transmission signal is connected with the pick-up antenna of the part that can receive described transmission signal with input terminal.
17. electronic tuning unit as claimed in claim 11 is characterized in that,
Described current control division comprises:
Detection offers the testing circuit of described transmission signal with the described transmission signal of input terminal; And
Be connected in the output of described testing circuit and the Current Control of described the 1st high-frequency amplifier and use between the input, and control the current control circuit of the electric current of described the 1st high-frequency amplifier.
18. a portable telephone device adopts the described electronic tuning unit of claim 2.
19. a portable telephone device is characterized in that,
Be built-in with the described electronic tuning unit of mobile phone and claim 12,
The transtation mission circuit that is built in the described mobile phone comprises:
Amplify the power amplifier of described transmission signal;
Insert the output of described power amplifier and the 1st resonator between the described mobile phone usefulness antenna;
Form the 2nd resonator as directional coupler near described the 1st resonator;
Be connected in an end of described the 2nd resonator and the 1st resistance between the ground connection; And
Be connected in the gain control circuit between the gain controlling input of the other end of described the 2nd resonator and described power amplifier,
The other end of described the 2nd resonator is connected with input terminal with described transmission signal.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006304739 | 2006-11-10 | ||
| JP2006304739 | 2006-11-10 | ||
| JP2007037555 | 2007-02-19 | ||
| JP2007063196 | 2007-03-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101179678A CN101179678A (en) | 2008-05-14 |
| CN100536545C true CN100536545C (en) | 2009-09-02 |
Family
ID=39405747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101860486A Expired - Fee Related CN100536545C (en) | 2006-11-10 | 2007-11-09 | Electronic tuner and portable telephone device using the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2008141716A (en) |
| CN (1) | CN100536545C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6329732B2 (en) * | 2013-05-13 | 2018-05-23 | Ｄｘアンテナ株式会社 | Level checker and reception setting method of digital terrestrial television broadcasting using level checker |
| WO2022196642A1 (en) * | 2021-03-16 | 2022-09-22 | 株式会社村田製作所 | Transient voltage absorbing circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4329713A (en) * | 1980-06-26 | 1982-05-11 | Rca Corporation | Television automatic gain control system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0715391A (en) * | 1993-06-24 | 1995-01-17 | Sharp Corp | Radio communications equipment |
| JP2001292037A (en) * | 2000-04-04 | 2001-10-19 | Matsushita Electric Ind Co Ltd | Distortion characteristic control system |
| JP4639809B2 (en) * | 2005-01-17 | 2011-02-23 | パナソニック株式会社 | Electronic tuner and portable device using the same |
| JP2006237793A (en) * | 2005-02-23 | 2006-09-07 | Matsushita Electric Ind Co Ltd | High-frequency signal receiver and high-frequency signal receiver using the same |
| JP2006261998A (en) * | 2005-03-16 | 2006-09-28 | Toshiba Corp | Mobile communication terminal |
-
2007
- 2007-02-19 JP JP2007037555A patent/JP2008141716A/en active Pending
- 2007-11-09 CN CNB2007101860486A patent/CN100536545C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4329713A (en) * | 1980-06-26 | 1982-05-11 | Rca Corporation | Television automatic gain control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101179678A (en) | 2008-05-14 |
| JP2008141716A (en) | 2008-06-19 |
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