CN101150329B - Radio transceiver bias circuit - Google Patents

Radio transceiver bias circuit Download PDF

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CN101150329B
CN101150329B CN 200710162868 CN200710162868A CN101150329B CN 101150329 B CN101150329 B CN 101150329B CN 200710162868 CN200710162868 CN 200710162868 CN 200710162868 A CN200710162868 A CN 200710162868A CN 101150329 B CN101150329 B CN 101150329B
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current
amplifier
output
unit
connected
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CN 200710162868
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CN101150329A (en )
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杨展升
魏淑芬
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络达科技股份有限公司
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Abstract

This invention relates to a bias circuit of a radio transceiver, especially to one used in regulating gain of a amplifier including a first stage of bias unit for receiving a current, a control voltage and a first reference voltage and outputting a first output current, in which, the control voltage is used in controlling size of the first output curent and rising or falling it in the mode of analogy so as to apply the first output current in the regulation of the gain of an amplifier and change the gain of the amplifier in the way of analogy to reduce the instant reaction to the lowest when regulating the gain of the amplifier.

Description

无线收发器的偏压电路 Wireless transceiver bias circuit

技术领域 FIELD

[0001] 本发明涉及一种无线收发器的偏压电路,尤指一种可用于调整放大器增益的偏压电路,可将放大器增益调整时所产生的瞬时反应降到最低。 [0001] The present invention relates to a wireless transceiver bias circuit, particularly to a bias circuit for adjusting an amplifier gain, the amplifier gain adjustment when the transient response can be generated to a minimum.

背景技术 Background technique

[0002] 请参阅图1,为现有技术中的无线收发器的前端电路图。 [0002] Referring to FIG. 1, the distal end of the prior art circuit diagram of a wireless transceiver. 如图所示,无线收发器(transceiver)的前端电路10包括有一天线11、一放大器13、一混频器15及一本地振荡器17。 As illustrated, a wireless transceiver (transceiver) front end circuit 10 includes an antenna 11, an amplifier 13, a mixer 15 and a local oscillator 17. 其中天线11用以接收一接收讯号,例如为一射频或类比讯号,并将所接收讯号传送至放大器13以进行接收讯号的放大,一般放大器13可为一低噪声放大器(low noise amplifier ;LNA)。 Wherein the receiving antenna 11 receives a signal, for example, a radio frequency or analog signal, and transmits the received signal to the amplifier 13 amplifies the received signals, the amplifier 13 may typically be a low noise amplifier (low noise amplifier; LNA) . 而后,再将放大讯号透过混频器15及本地振荡源17进行混波动作,藉此将接收讯号降频为一中频讯号。 Then, the amplified signal and then perform the operation of the mixer through a mixer 15 and local oscillator 17, whereby the received signal is down-converted to an intermediate frequency signal. 透过上述降频动作的进行,无线收发器的后端电路(未显示)才可以对降频后的讯号(中频讯号)进行处理。 Down through the above-described operation, the back-end circuit of the wireless transceiver (not shown) can process the signal (IF signal) after down.

[0003] 一般而言,放大器13的增益主要是根据天线11所接收的接收讯号的强弱来进行调整,例如:当接收讯号为一微弱的讯号时,便需要提高放大器13的增益,并使得放大器13 可以将微弱的讯号进行适度的放大,藉此无线收发器的后端电路才能对讯号进行处理。 [0003] In general, the gain of amplifier 13 is carried out primarily in accordance with the strength of the received signal received by the antenna 11 is adjusted, for example: when receiving a signal is a faint signal, it is necessary to increase the gain of the amplifier 13, and such that amplifier 13 the signal may be weak moderate amplification, whereby the rear end to the wireless transceiver circuit for processing the signal. 相反的,若接收讯号为一较大的讯号时,便需要降低放大器13的增益,以使得放大器13的增益适用于较大的讯号,并以放大器13对较大的讯号进行适度的放大。 Conversely, if the received signal is a large signal, it is necessary to reduce the gain of amplifier 13, so that the amplifier gain signal 13 applied to larger and larger to a signal amplifier 13 for amplifying appropriate.

[0004] 一般放大器13的增益大小主要是由与放大器13相连接的控制电路19所控制,该控制电路19是以数字方式制定出多阶的增益模式来建置,藉此以进行放大器13增益的调整。 [0004] Usually gain of the main amplifier 13 is controlled by the control circuit 13 and the amplifier 19 is connected to the control circuit 19 is digitally develop a multi-step gain mode to build, whereby the gain of the amplifier 13 for adjustments. 换言之,控制电路19将根据天线11所传送的接收讯号的强度来调整放大器13的增益。 In other words, the control circuit 19 adjusts the gain of the amplifier 13 the received signal according to the intensity of the transmitted antenna 11.

[0005] 以现有技术的控制电路19来进行放大器13增益的调整时将会存在有下列的问题:现有技术的控制电路19是以数字控制讯号来改变放大器13的增益,因此放大器13的增益无论是在调升或调降的过程当中都会有瞬时反应出现,在应用时就必须等到瞬时反应结束后才可以放大器13进行讯号的放大,对此将会影响无线收发器的前端电路10的工 [0005] In the time control circuit 19 of the prior art to adjust the gain of the amplifier 13 will present the following problems: the prior art control circuit 19 is a digital control signal to vary the gain of amplifier 13, amplifier 13 thus gain in the process of either raised or lowered, there will be a transient response occurs when the application must wait until the end of the transient response can be an amplifier 13 amplifying the signal, this will affect the front-end circuit of the wireless transceiver 10 work

作效率。 For efficiency.

[0006] 此外,控制电路19所输出的数字控制讯号的大小,主要是由后端电路侦测放大器13所输出的放大讯号的强度来决定,而后端电路还是要等待瞬时反应结束才能进行讯号强度的侦测,否则后端电路将会侦测到错误的放大讯号强度,例如可能会侦测到瞬时反应时的讯号强度,而造成放大器13增益的调整出现错误。 [0006] In addition, the size of the digital control signal output from the control circuit 19 is mainly determined by the strength of the amplified signal 13 outputted from the amplifier circuit detects the rear end, the rear end of the circuit or to wait for the end of the reaction to be instantaneous signal strength detection, or back-end circuit will detect the error amplification signal strength, for example, could detect the signal strength of the instantaneous reaction, causing amplifier 13 to adjust the gain error. 由于在每一次放大器19增益的调整时,后端电路都必须要等到瞬时反应结束后才可以进行放大讯号强度的感测,再以控制电路19对放大器13的增益进行调整,不仅会有侦测错误的情形发生,亦会造成无线收发器的工作效率下降。 Since at each gain adjusting amplifier 19, the rear end of the circuit must wait until after the end of the reaction can be carried out instantaneously sense amplification signal strength, then the control circuit 19 to the gain adjusting amplifier 13, will detect only an error occurs, it will result in the efficiency of the wireless transceiver decline.

发明内容 SUMMARY

[0007] 为此,如何针对上述现有技术的缺点,而设计出一种可应用于调整放大器增益的偏压电路,不仅可避免在放大器增益变动时所造成的瞬时反应,并可提高无线收发器处理接收讯号的效率,此为本发明的发明重点的一;另外,增益变化同时放大器的噪声指数与线性度同时伴随着变化,其中线性度的表现亦可以透过偏压电路的调整,进而调整晶体管的电流密度,最后调整在某特定增益下的线性度表现。 [0007] For this purpose, how the above-described disadvantages of the prior art for, and applicable to design a bias circuit to adjust the gain of the amplifier, not only to avoid transient response when the amplifier gain fluctuation caused by, and can improve radio the efficiency of processing the received signals, the focus of this invention is a present invention; Further, while the gain variation of the amplifier noise figure and linearity while accompanied by changes, the linearity performance which also can be adjusted through the bias circuit, and further adjusting the current density of the transistor, and finally adjusting the linearity performance at a specific gain.

[0008] 本发明的主要目的,在于提供一种无线收发器的偏压电路,其中偏压电路用以进行放大器增益的调整,并使得放大器增益的变化曲线为一类比的平滑曲线,藉此将可避免放大器增益变动时出现瞬时反应的可能。 [0008] The main object of the present invention is to provide a bias circuit of the wireless transceiver, wherein the bias circuit for adjusting the gain of the amplifier, and the amplifier gain such that the curve is a smooth curve analogy, whereby possible instantaneous reaction when changes can be avoided gain amplifier.

[0009] 本发明的次要目的,在于提供一种无线收发器的偏压电路,其中该偏压电路可输出一平滑的输出电流,且该输出电流的调升或调降是以类比的方式进行,并使得与偏压电路相连接的放大器增益的调整亦是以类比的方式进行。 [0009] Secondary object of the present invention is to provide a bias circuit of the wireless transceiver, wherein the bias circuit may output a smooth output current and the output current is raised or lowered in a manner analogous performed, and so adjust the gain of the amplifier is connected to the bias circuit is also analogous manner.

[0010] 本发明的又一目的,在于提供一种无线收发器的偏压电路,其中该偏压电路透过一转换器与放大器相连接,而转换器可将偏压电路所产生的输出电流转换成为一调整电压,藉此将更有利于进行放大器增益的调整。 [0010] A further object of the present invention is to provide a bias circuit of the wireless transceiver, wherein the bias circuit is connected via a converter and an amplifier, and the converter may be generated by the bias circuit output current converted into a voltage adjustment, whereby the adjustment will be more conducive to the amplifier gain.

[0011] 本发明的又一目的,在于提供一种无线收发器的偏压电路,其中放大器包括有调整单元,并透过调整单元进行放大器增益的改变,藉此将可以增加放大器增益的调整范围。 [0011] A further object of the present invention is to provide a wireless transceiver bias circuit, wherein the amplifier comprises adjusting means, and changing the gain of the amplifier by adjusting means, whereby the adjustment range can increase the amplifier gain .

[0012] 为达成上述目的,本发明提供一种无线收发器的偏压电路,主要包括有一第一级偏压单元用以接收一定电流、一控制电压及一第一参考电压,并依据所接收的定电流、控制电压及第一参考电压而产生一第一输出电流,其中第一输出电流的大小是由控制电压所控制,并以类比的方式进行调升或调降,以使该第一输出电流的输出曲线与该控制电压的控制相符。 [0012] To achieve the above object, the present invention provides a bias circuit radio transceiver, including a first stage unit receives a constant current bias, a control voltage and a first reference voltage, and based on the received constant current control voltage and a first reference voltage to generate a first output current, wherein the magnitude of the first output current is controlled by the control voltage, and in a manner analogous raised or lowered, so that the first output curve of the output current is consistent with the control voltage.

[0013] 本发明尚提供一种无线收发器的偏压电路,主要包括有:一定电流单元,用以产生一偏压电流;一第一差动单元,连接定电流单元,并接收一控制电压、一参考电压及偏压电流;一第一电流镜,连接第一差动单元,并产生一第一输出电流;及一负载单元,与第一差动单元相连接。 [0013] The present invention still provides a bias circuit of the wireless transceiver, mainly comprising: a constant current means for generating a bias current; a first differential unit, connected to a constant current unit, and receives a control voltage , a voltage reference and bias current; a first current mirror, connected to a first differential unit, and generating a first output current; and a load unit, connected to the first differential unit.

[0014] 本发明又提供一种无线收发器的偏压电路,主要包括有:一第一级偏压单元,包括有:一定电流单元,用以产生一偏压电流;一第一差动单元,连接定电流单元,并接收一控制电压、一第一参考电压及定电流单元所产生的偏压电流;一第一电流镜,连接第一差动单元,并产生一第一输出电流;及一第二电流镜,连接第一差动单元,并产生一第二电流;及至少一第二级偏压单元,包括有:一第三电流镜,连接第二电流镜,并接收第二电流镜所产生的第二电流;一第二差动单元,连接第三电流镜,并接收控制电压及一第二参考电压;一负载单元,连接第二差动单元;及一第四电流镜,连接第二差动单元,并产生一第三输出电流。 [0014] The present invention further provides a wireless transceiver bias circuit, including: a first stage bias means comprises: a constant current means for generating a bias current; a first differential unit , the constant current unit is connected, and receives a control voltage, a bias current and a first reference voltage generated by the constant current unit; a first current mirror, connected to a first differential unit, and generating a first output current; and a second current mirror, connected to a first differential unit, and generating a second current; and at least one second stage bias means comprises: a third current mirror, connected to the second current mirror, and a second current receiving generated by the second current mirror; a second differential unit, connected to the third current mirror, and receives a control voltage and a second reference voltage; a load unit, connected to the second differential means; and a fourth current mirror, connecting the second differential unit, and generates a third output current.

[0015] 以下结合附图和具体实施例对本发明进行详细描述,但不作为对本发明的限定。 [0015] The following embodiments in conjunction with accompanying drawings and specific embodiments of the present invention will be described in detail, but do not limit the present invention.

[0016] 附图说明 [0016] BRIEF DESCRIPTION OF DRAWINGS

[0017] 图1 :为现有技术中的无线收发器的前端电路图; [0017] FIG. 1: is a circuit diagram of the front end of the prior art radio transceiver;

[0018] 图2 :为本发明无线收发器的偏压电路一较佳实施例的方块示意图; [0018] FIG. 2: the bias circuit of the wireless transceiver of the present invention a preferred embodiment of a schematic block diagram;

[0019] 图3 :为本发明偏压电路一较佳实施例的电路图; [0019] FIG 3: a circuit diagram of a preferred embodiment of the bias circuit of the present invention;

[0020] 图4 :为本发明偏压电路所连接的放大器的电路图; [0020] Figure 4: a circuit diagram of an amplifier biasing circuit of the present invention is connected;

[0021] 图5 :为本发明偏压电路的输出电流曲线图;[0022] 图6:为本发明无线收发器的偏压电路又一实施例的方块示意图;[0023] 图7:为本发明偏压电路又一实施例的电路图;[0024] 图8:为本发明偏压电路所连接的放大器的电路图;[0025] 图9:为本发明偏压电路的输出电流曲线图;[0026] 图lo:为本发明偏压电路又一实施例的电路图;[0027] 图11:为本发明上述实施例的输出电流曲线图;[0028] 图12:为本发明偏压电路与放大器的方块示意图;[0029] 图13:为本发明偏压电路与放大器的电路图;[0030] 其中,附图标记:[0031] 10 前端电路。 [0021] Figure 5: a graph showing the output current of the present invention, bias circuit; [0022] FIG 6: is a block schematic diagram of a bias circuit embodiment the wireless transceiver to still another embodiment of the present invention; [0023] Figure 7: the present embodiment of the invention, a circuit diagram of a further embodiment of the bias circuit; [0024] FIG. 8: a circuit diagram of an amplifier biasing circuit of the present invention is connected; [0025] Figure 9: a graph showing the output current of the bias circuit of the present invention; [0026 ] FIG LO: a circuit diagram of the bias circuit further embodiment of the present invention; [0027] Figure 11: a graph showing the output current of the above-described embodiment of the present invention; [0028] FIG. 12: a bias circuit of the amplifier of the present invention. schematic block; [0029] Figure 13: a circuit diagram of a bias circuit of the amplifier of the present invention; [0030] wherein reference numerals: [0031] 10 front end circuit. L 1 ,乏线[0032] 13 放大器15 混频器[0033] 17 本地震荡器19 控制电路[0034] 20 无线收发器200 偏压电路[0035] 2] 第一级偏压单元211 定电流单元[0036] 212 定电流源213 f乜流镜电路[0037] 214 第一差动单元215 第一电流镜[0038] 216 负载单元217 吊体管[0039] 218 第二电流镜23 转换器[0040] 231 E乜阻233 晶体管[0041] 235 E乜容25 放大器[0042] 250 调整单元251 i~,g控晶体管[0043] 252 E乜阻253 电阻[0044] 255 放大晶体管27 天线[0045] 30 无线收发器300 偏压电路[0046] 31 第一级偏压单元311 定电流单元[0047] 314 第一差动单元315 第一电流镜[0048] 3 16 第二电流镜33 第二级偏压单元[0049] 33 1 第三电流镜334 第二差动单元[0050] 335 负载单元336 第四电流镜[0051] 35 放大器351 第一接收晶体管[0052] 352 第一负载电阻353 第二接收晶体管[0053] 354 第二负载电阻355 第一放大晶体管[0054] 356 第二放大晶体管357 f乜阻[0055] 358 E乜 L 1, lack of line [0032] 13 amplifier 15 mixer [0033] 17 local oscillator control circuit 19 [0034] 20 wireless transceiver bias circuit 200 [0035] 2] The first stage 211 constant current biasing unit cell [0036] The constant current source 212 current mirror circuit NIE 213 f [0037] The first 214 of the first differential unit 215 current mirror [0038] 216 217 hanging load cell transistor [0039] 218 of the second current mirror converter 23 [0040 ] 231 E NIE barrier 233 transistor [0041] 235 E NIE container 25 amplifier [0042] 250 adjustment unit 251 i ~, g control transistor [0043] 252 E NIE barrier 253 resistor [0044] 255 of the amplifying transistor 27 antenna [0045] 30 wireless transceiver 300 bias circuit [0046] 31 of the first stage 311 constant current biasing unit cell [0047] The first current mirror 314 315 [0048] 316 of the second current mirror 33 of the second stage of the first differential unit biasing unit [0049] The third current mirror 331 of the second differential unit 334 [0050] 335 of the load unit 336 of the fourth current mirror [0051] 35 receives the first amplifier transistor 351 [0052] 352 receives the first load resistor and a second transistor 353 [0053] The second load resistor 354 of the first amplifying transistor 355 [0054] 356 of the second amplifier transistor 357 f-what-barrier [0055] 358 E NIE 37 天线[0056] 400 偏压电路4l 晶体管[0057] 50 无线收发器500 偏压电路[0058] 51 第一级偏压单元511 定电流单元[0059] 514 第一差动单元515 第一电流镜[0060] 518 第二电流镜具体实施方式 37 antenna [0056] 400 transistor bias circuit 4l [0057] 50 wireless transceiver 500 bias circuit [0058] 51 of the first stage 511 constant current biasing unit cell [0059] 514 of the first differential unit 515 of the first current mirror [0060] The second current mirror 518 DETAILED DESCRIPTION

[0061] 首先,请参阅图2,为本发明无线收发器的偏压电路一较佳实施例的方块示意图。 Block [0061] First, referring to FIG 2, a wireless transceiver of the present invention, a preferred embodiment of the biasing circuit of FIG. 如图所示,无线收发器(transceiver) 20主要包括有一偏压电路200、放大器25及天线27, 其中偏压电路200包括有一第一级偏压单元21,而放大器25分别与第一级偏压单元21及天线27相连接,并用以将天线27所接收的接收讯号进行放大,例如接收讯号可为一射频或类比讯号。 As illustrated, a wireless transceiver (transceiver) 20 includes a bias circuit 200, an amplifier 25 and antenna 27, wherein the bias circuit 200 comprises a first stage biasing unit 21, and the amplifier stage 25 with the first partial and a pressing unit 21 is connected to an antenna 27, and for receiving the signals received by the antenna 27 is amplified, for example, may be a radio frequency signal received or analog signals. 放大器25的增益可由第一级偏压单元21进行调整,例如以第一级偏压单元21 所输出的第一输出电流11的大小来控制放大器25的增益,而第一级偏压单元21在进行放大器25增益的调整时,主要是以天线27所传送的接收讯号的大小为依据,以使得放大器25 所输出的放大讯号符合后端电路(未显示)的需求。 Gain of the amplifier 25 is biased by the first stage unit 21 is adjusted, for example, a size of a first output stage bias current of the first output unit 2111 controls the gain of the amplifier 25, and the first stage bias unit 21 when the gain adjusting amplifier 25, the size of the received signals mainly transmitted by the antenna 27 as the basis, so that the amplifier 25 the amplified signal output line with the rear end of the circuit (not shown) needs.

[0062] 第一级偏压单元21用以接收一定电流Is、一控制电压VAGC及一第一参考电压Vrefl,并依据该定电流Is、控制电压VAGC及第一参考电压Vrefl而产生一第一输出电流II,使得第一输出电流Il具有一平滑的输出曲线,并以类比的方式进行第一输出电流Il的调升或调降。 [0062] The first stage of the bias unit 21 for receiving a constant current Is, a first control voltage VAGC and a reference voltage Vrefl, and according to the constant current Is, the control voltage VAGC and the first reference voltage to generate a first Vrefl II output current, the output current Il that the first output has a smooth curve, and the manner in analogy first output current Il is raised or lowered. 其中第一参考电压Vrefl为一固定电压,而控制电压VAGC则为一可变电压, 并透过控制电压VAGC的改变来调整第一输出电流Il的大小。 Wherein the first reference voltage Vrefl is a fixed voltage, and the control voltage VAGC compared with a variable voltage, and to adjust the size of the first output current Il through the control voltage VAGC is changed.

[0063] 而且,本发明实施例所述的第一级偏压单元21,不仅可采用电流调控的方式来改变放大器25的增益,亦可配合放大器25的不同而改以电压调控的方式来改变放大器25的增益。 [0063] Further, 21, may be employed not only the current regulation stage bias unit according to a first embodiment of the embodiment of the present invention to change the gain of the amplifier 25, the amplifier 25 can fit a different voltage to change the way to change the regulation gain amplifier 25. 例如可以在第一级偏压单元21与放大器25的间增设有一转换器23,该转换器23用以将第一级偏压单元21所产生的第一输出电流Il转换成一调整电压Vreg,并透过调整电压Vreg来改变放大器25的增益。 For example, the additional biasing means 21 between the first-stage amplifier 25 has a converter 23, the converter 23 for converting a first output stage bias current Il of the first unit 21 to generate a regulated voltage Vreg, and voltage Vreg through adjustments to change the gain of amplifier 25. 而且,调整电压Vreg的大小将会随着第一级偏压单元21 所输出的第一输出电流Il而改变,因此同样可以第一级偏压单元21的控制电压VAGC对调整电压Vreg及放大器25增益进行调整。 Furthermore, the magnitude of the adjustment voltage Vreg output current Il will as the first stage of the first biasing means 21 output changes, so the same cell may be the first stage bias control voltage VAGC 21 to 25 and an amplifier adjustment voltage Vreg gain adjustment.

[0064] 由上述的实施方式可得知,放大器25的增益主要是由第一级偏压单元21所输入的第一输出电流Il或调整电压Vreg所控制,且放大器25增益的曲线与第一输出电流Il 或调整电压Vreg的变化曲线相关。 [0064] can be seen from the above-described embodiment, the first current output voltage Vreg Il or adjust the gain of the amplifier 25 is mainly composed of a first input stage bias unit 21 controls, 25 and the gain curve of the first amplifier correlation curve or change in output current Il of the regulated voltage Vreg. 在本发明中主要是藉由第一级偏压单元21的设置,使得第一输出电流Il及调整电压Vreg的曲线成为一类比的输出曲线,藉此放大器25的增益将同样以类比的方式进行改变,并可避免放大器25增益在改变时有瞬时反应的发生。 In the present invention, the first stage is mainly provided by the biasing means 21, such that the first output current Il and the curve adjustment voltage Vreg output curve becomes an analogy, whereby the gain of the amplifier 25 will be the same in a manner analogous change, and avoid the occurrence of the amplifier 25 is gain transient response upon change.

[0065] 请参阅图3及图4,分别为本发明偏压电路一较佳实施例的电路图及偏压电路所连接的放大器的电路图。 [0065] Please refer to FIGS. 3 and 4, respectively, a circuit diagram of a bias circuit and the bias circuit diagram of an amplifier circuit according to the preferred embodiment of the present invention is connected. 如图所示,偏压电路200包括有一定电流单元211、一第一差动单元214、一第一电流镜215及一负载单元216,其中第一差动单元214分别连接定电流单元211、第一电流镜215及负载单元216,并接收该定电流单元211所产生的偏压电流Ibias。 As shown, the bias circuit 200 comprises a constant current unit 211, a first differential unit 214, a first current mirror 215, and a load cell 216, wherein the first differential unit 214 are connected to a constant current unit 211, the first current mirror 215 and the load unit 216, and receives bias current Ibias generated by the constant current unit 211.

[0066] 定电流单元211包括有一定电流源212及一电流镜电路213,电流镜电路213连接该定电流源212,以映射该定电流源212的定电流Is而产生偏压电流Ibias,并将偏压电流Ibias提供给第一差动单元214。 [0066] unit 211 includes a constant current 213, the current mirror circuit 213 is connected to the constant current source 212, to map the constant current source 212 generates a constant bias current Is the Ibias current, and a constant current source 212 and a current mirror circuit the bias current Ibias is supplied to a first differential unit 214.

[0067] 第一差动单元214接收一控制电压VAGC、一第一参考电压Vrefl以及定电流单元211所产生的偏压电流Ibias,并一据控制电压VAGC、第一参考电压Vrefl及偏压电流Ibias而产生电流Ia及lb。 [0067] The first unit 214 receives a differential control voltage VAGC, a first reference voltage Vrefl and a bias current Ibias generated by the constant current unit 211, and a data control voltage VAGC, a first bias current and the reference voltage Vrefl Ibias generated current Ia and lb.

[0068] 第一电流镜215用以映像第一差动单元214的电流Ia而产生第一输出电流II, 且偏压电路200的第一输出电流Il会随着控制电压VAGC的大小而改变。 [0068] 215 for a first image of a first current mirror differential cell current Ia 214 generate a first output current II, and the first output current Il will bias circuit 200 as the control voltage VAGC size is changed. 例如当控制电压VAGC上升的同时电流Ia将会随之增加,电流Ib会随着电流Ia的上升而下降,而第一输出电流Il则会随着电流Ia的增加而增力卩,藉此将可以控制电压VAGC的大小来控制第一输出电流Il的值。 For example when the control voltage VAGC will rise while the current Ia increases, the current Ib will rise with current Ia decreases, the first output current Il will increase as the energizing current Ia Jie, whereby voltage VAGC can be controlled to control the size of the value of the first output current Il.

[0069] 在本发明另一实施例中,偏压电路200包括有负载单元216,例如负载单元216可为一晶体管217、一第二电流镜218或是电阻等负载组件。 [0069] In another embodiment of the present invention, the bias circuit 200 includes a load unit 216, load cell 216 may be for example a transistor 217, a second current mirror 218 or the like resistive load components. 若负载单元216为一第二电流镜218,该第二电流镜218将会映像第一差动单元214的电流Ib而产生一第二输出电流12, 由于电流Ib会随着控制电压VAGC而改变,因此第二输出电流12的大小同样可以由控制电压VAGC来进行调整,且第二输出电流12是以相对于第一输出电流Il的方式改变,例如第一输出电流Il增加时第二输出电流12将会下降,如图5所示的曲线。 If the load unit 216 is a second current mirror 218, the second current mirror 218 will be the first image of the differential unit 214 and the current Ib to generate a second output current 12, the current Ib will change as the control voltage VAGC , the size of the second output current 12 can also be adjusted by the control voltage VAGC, 12 and the second output current with respect to the first output current is changed in a manner Il, for example, increasing the first output current of the second output current Il 12 will be reduced, the curve shown in Figure 5.

[0070] 在实际应用时偏压电路200亦可与一转换器23或一放大器25相连接,例如偏压电路200的第一电流镜215连接转换器23及/或放大器25。 [0070] 200 and also a converter or a bias circuit 23 is connected to amplifier 25 in practical applications, for example, the first current mirror 215 connected to the bias circuit 200 of the converter 23 and / or the amplifier 25. 当转换器23与偏压电路200 的第一电流镜215相连接时,转换器23将接收偏压电路200所输出的第一输出电流II,并将第一输出电流Il转换成为一调整电压Vreg。 When the converter 23 is connected to the first current mirror 215 of bias circuit 200, the converter 23 receives the output from the bias circuit 200 output a first current II, and a first output current Il is converted into an adjustment voltage Vreg . 而放大器25则连接转换器23并接收调整电压Vreg,藉此以控制调整电压Vreg的大小进行放大器25增益的调整,并以调整的放大器25增益将接收讯号进行适度的放大。 And the amplifier 25 connected to the converter 23 and receives the regulated voltage Vreg, thereby to adjust the control voltage Vreg to adjust the size of the gain amplifier 25, and to adjust the gain of the received signal amplifier 25 for amplifying appropriate.

[0071] 转换器23包括有一电阻231及一晶体管233的串联,例如电阻231连接晶体管233的漏极端,且晶体管233的栅极端与漏极端共连接。 [0071] The converter 23 includes a series resistor 231 and a transistor 233, a resistor 231 is connected, for example, the drain terminal of the transistor 233, the gate terminal and the drain terminal of the transistor 233 is connected in common. 第一输出电流Il在流入转换器23 后,将会有部分的第一输出电流Il流过电阻231及晶体管233,而在串联的电阻231及晶体管233上负载一调整电压Vreg,该调整电压Vreg会随着第一输出电流11而增加。 A first output current Il flows into the converter 23, there will be a first portion of the output current Il flows through resistor 231 and transistor 233, and a load adjustment voltage Vreg across the resistor 231 and the transistor 233 connected in series, the tuning voltage Vreg 11 as the first output current will increase. 在本发明另一实施例中,转换器23尚包括有一电容235,电容235与电阻231及晶体管233并联以稳定调整电压Vreg的大小。 In another embodiment of the present invention, the converter 23 still comprises a capacitor 235, capacitor 235 and resistor 231 and the transistor sizes to adjust the voltage Vreg of the stabilized 233 in parallel.

[0072] 放大器25包括有一放大晶体管255及一调整单元250,而放大晶体管255透过调整单元250与偏压电路200或转换器23相连接,例如调整单元250包括有一调控晶体管251 及电阻252/253。 [0072] The amplifier 25 includes an amplifying transistor 255, and an adjusting unit 250, the amplifying transistor 255 via the adjusting unit 250 and the bias circuit 200 or the converter 23 is connected to, for example, adjusting unit 250 includes a regulation transistor 251 and resistors 252 / 253. 放大晶体管255的源极端与电阻252及电阻253相连接,而电阻252尚串联有一调控晶体管251,且调控晶体管251的栅极端连接转换器23并接收调整电压Vreg。 The source terminal of the resistor 252 and the resistor 253 is connected to the amplifying transistor 255 and resistor 252 in series with a still regulation transistor 251 and the gate terminal of the regulation transistor 251 is connected to the converter 23 and receives the regulated voltage Vreg.

[0073] 在应用时可透过调整电压Vreg对调控晶体管251进行开/关的切换,藉此以改变电阻252及电阻253上的电流,并调整放大晶体管255的源极端上的电压,而达到放大器25 增益改变的目的。 [0073] When the application voltage Vreg can be adjusted through the regulation transistor 251 on / off switch, thereby to vary the current in the resistor 252 and the resistor 253, and adjust the magnification of the voltage on the source terminal of transistor 255, to achieve the purpose of the gain amplifier 25 is changed. 当然在不同实施例中调整单元250的调控晶体管251亦可直接与偏压电路200相连接,并可省去转换器23的设置。 Of course, the adjustment unit 250 in various embodiments may regulation transistor 251 is directly connected to the bias circuit 200 may be omitted provided the converter 23.

[0074] 调整单元250的工作方式如下,当第一输出电流Il上升的同时调整电压Vreg将会随的增加,然而在调整电压Vreg未超过调控晶体管251的临界电压Vt时,调控晶体管251将呈现关闭状态,此时放大器25的增益将由工作偏压Vbias及电阻253上所负载的电压决定。 Work [0074] The adjusting unit 250 as follows, when a first adjustment voltage Vreg output current Il will rise simultaneously with the increase, however, when the regulated voltage Vreg adjustment does not exceed the threshold voltage Vt of the transistor 251, the transistor 251 will be rendered regulation closed state when the voltage on the gain determined by the resistor 253 and the bias voltage Vbias working amplifier 25 is loaded.

[0075] 反的,若第一输出电流Il持续增加,并使得调整电压Vreg超过调控晶体管251的临界电压Vt,调控晶体管251将缓慢的打开,开始有部分的电流会流过电阻252及调控晶体管251,而放大晶体管255的源极端的电压将会被改变,藉此以达到改变放大器25增益的目的。 [0075] The opposite, when the first output current Il continues to increase, and so adjust the regulated voltage Vreg exceeds the threshold voltage Vt of the transistor 251, the transistor 251 will slow regulation to open, a current starts flowing through the resistor portion will regulation transistor 252 and 251, while the source terminal voltage of the amplifying transistor 255 will be changed, thereby to achieve the purpose of changing the gain of the amplifier 25. 因此,在本发明实施例中,可以偏压电路200所产生的第一输出电流Il来改变电阻252/253上的电流,而达到以偏压电路200改变放大器25增益,近而改变该增益的下放大器的线性度表现的目的。 Thus, the output current Il in the first embodiment of the present invention, the bias circuit 200 may be generated by changing the current across resistor 252/253, to achieve the change in the bias circuit 200 25 gain amplifier, and varying the gain of nearly Objective of the linearity of the amplifier performance. [0076] 请参阅图6,为本发明无线收发器的偏压电路又一实施例的方块示意图。 [0076] Referring to FIG 6, a block schematic example of a bias circuit radio transceiver further embodiment of the present invention. 本发明所述的偏压电路可以如图2所述实施例,一般为单一级的偏压电路,亦可因放大器的不同而设计成两级或者是多级形式的偏压电路。 The bias circuit of the present invention, the second embodiment can be illustrated, typically a single bias circuit, the amplifier may vary designed in two stages or multiple stages of the bias circuit. 如图所示,无线收发器30的偏压电路300包括有一第一级偏压单元31及一第二级偏压单元33,该第一级偏压单元31及第二级偏压单元33 皆与一放大器35相连接,并用于进行放大器35增益的调整。 As illustrated, a wireless transceiver 30, a bias circuit 300 includes a first stage 31 and a biasing means biasing the second stage unit 33, the first stage and the second biasing means 31 biasing means 33 are two 35 is connected to an amplifier, and the amplifier 35 for adjusting the gain.

[0077] 在实际应用时放大器35分别接收第一级偏压单元31及第二级偏压单元33所产生的第一输出电流Il及第三输出电流13,且放大器35的增益将随着第一输出电流Il及第三输出电流13的大小而改变。 [0077] The first output current Il 35 respectively receive a first bias stage amplifier unit in the practical application of the bias unit 31 and a second stage 33 and the third output current generated by 13, and the gain of amplifier 35 will vary a third output current and the output current Il 13 varies. 其中偏压电路300将依据天线37所接收的接收讯号的大小来调整放大器35的增益,以使得放大器35所输出的放大讯号符合后端电路的需求。 Wherein the bias circuit 300 adjusts the gain of the amplifier 35 depending on the size of the receive signals received by the antenna 37, so that the signal amplified by the amplifier 35 output to meet the needs of the back-end circuit.

[0078] 第一级偏压单元31接收一定电流Is、一控制电压VAGC及一第一参考电压Vrefl, 并依据定电流Is、控制电压VAGC及第一参考电压Vrefl而产生第一输出电流Il及一第二输出电流12。 [0078] The first stage bias unit 31 receives a constant current Is, a first control voltage VAGC and a reference voltage Vrefl, and based on a constant current Is, and the control voltage VAGC to generate a first reference voltage Vrefl and a first output current Il a second output current 12. 而第二级偏压单元33连接第一级偏压单元31,以接收第二输出电流12、控制电压VAGC及第二参考电压Vref2,并产生第三输出电流13。 And the second stage 33 is connected to a first stage biasing unit biasing means 31, 12 for receiving the second output current, the control voltage VAGC and the second reference voltage Vref2, and generates a third output current 13. 其中第一参考电压Vrefl及第二参考电压Vref2为一固定电压,控制电压VAGC则为一可变电压,而第一输出电流Il及第三输出电流13的大小是由控制电压VAGC的大小来进行控制。 Wherein the first reference voltage Vrefl and the second reference voltage Vref2 is a fixed voltage, the control voltage VAGC compared with a variable voltage, and a first output current Il and the size of the third output current 13 is performed by the size of the control voltage VAGC control. 而且,第一输出电流Il及第三输出电流13是以相对应的方式进行变化,例如:当第一输出电流Il增加时,第三输出电流13将相对的减少。 Further, the first output current and the third output current Il is 13 changes corresponding manner, for example: When the first output current Il increases, the third output current 13 is reduced relatively.

[0079] 在本发明实施例中,第一级偏压单元31及第二级偏压单元33所输出的第一输出电流II、第二输出电流12及第三输出电流13皆具有一平滑的输出曲线,换言的,上述三者皆是以类比的方式进行变化。 [0079] In an embodiment of the present invention, a first stage and a second stage biasing means 31 biasing means 33 outputs a first output current II, the second current output 12 and the third output current 13 both have a smooth output curve, in other words, the above-described changes are all three-way of analogy. 藉此放大器35的增益同样会以类比的方式进行改变,并可避免放大器35增益改变时有瞬时反应的发生。 Whereby the gain of the amplifier 35 will be varied in the same way of analogy, and to avoid the occurrence of the transient response when the gain of the amplifier 35 changes.

[0080] 请参阅图7及图8,分别为本发明偏压电路又一实施例的电路图及偏压电路所连接的放大器的电路图。 [0080] Please refer to FIGS. 7 and 8, respectively, and the bias circuit diagram showing a circuit diagram of an amplifier circuit according to the bias circuit is connected to still another embodiment of the present invention. 如图所示,偏压电路300包括有第一级偏压单元31及第二级偏压单元33,并用以输出一第一输出电流Il及一第三输出电流13,藉此将可以偏压电路300所产生的第一输出电流Il及第三输出电流13对放大器35的增益进行调整。 As shown, the bias circuit 300 comprises a first stage and a second stage biasing means 31 biasing means 33, and a first output for outputting a third output current of the current Il and 13, may be biased whereby Il current gain of the first output circuit 300 and the generated output current of 13 pairs of a third amplifier 35 can be adjusted.

[0081 ] 第一级偏压单元31包括有一定电流单元311、一第一差动单元314、一第一电流镜315及一第二电流镜316,本发明实施例的第一级偏压单元31的构造、连接方式及作用皆与图3所述的偏压电路(200)相近,在此便不再阐述。 [0081] The first stage of the bias unit 31 comprises a constant current unit 311, a first differential unit 314, a first current mirror 315 and a second current mirror 316, a first stage bias unit of the embodiment of the present invention configuration, connection and function are similar to FIG. 31 of the bias circuit (200) of claim 3, it will not be explained here.

[0082] 第二级偏压单元33包括有一第三电流镜331、一第二差动单元334、一负载单元335及一第四电流镜336,其中负载单元335可为一负载晶体管或电阻等可形成负载的组件。 [0082] The second stage of the bias unit 33 comprises a third current mirror 331, a second differential unit 334, a load unit 335, and a fourth current mirror 336, wherein the load unit 335 may be a load transistor or a resistor, etc. load assembly can be formed. 第三电流镜331连接第一级偏压单元31的第二电流镜316,以接收第二电流镜316所产生的第二输出电流12,并映射第二输出电流12而产生电流Ic。 Third current mirror 331 connected to the first stage unit of the second bias current mirror 31 316, to receive the second output current 316 generated by the second current mirror 12, and generates a second output current Ic current map 12. 第二差动单元334连接第三电流镜331,以接收控制电压VAGC、一第二参考电压Vref2及第三电流镜331所产生的电流Ic,并形成电流Id及Ie。 The second differential unit 334 connected to the third current mirror 331, to receive the control voltage VAGC, a second current Ic and the third reference voltage Vref2 generated by current mirror 331, and forms a current Id and Ie. 负载单元335连接第二差动单元334以接收电流Id,第四电流镜336连接第二差动单元334以接收电流Ie,并且根据电流Ie映射产生一第三输出电流13。 Load unit 335 connected to the second differential unit 334 to receive the current Id, the fourth current mirror 336 is connected to the second differential unit 334 receives the current Ie, and the mapping to generate a third output current 13 current Ie.

[0083] 如上所述,第一输出电流11及第三输出电流13的大小皆可透过控制电压VAGC来控制,而第一输出电流Il及第三输出电流13之间是以相对应的方式变化,例如控制电压VAGC增大时第一输出电流Il将会随之增加,而第三输出电流13则会随之减小,如图9所示的曲线,当控制电压VAGC上升至第二参考电压Vref2时,第三输出电流13将会随之上升; 当控制电压VAGC上升至第一参考电压Vrefl时,第一输出电流Il将随之上升而第三输出电流13则会下降。 [0083] As described above, the output current of a first magnitude and a third output 11 of the current 13 can be accessed via the control voltage VAGC controls, and a first output current and the third output current Il is between 13 corresponding manner changes, for example, control the first output current Il increases the voltage VAGC will increase, and the third output current will be 13 decreases, the curve shown in Figure 9, when the control voltage VAGC to rise to the second reference voltage Vref2, the output of the third current 13 will rise; when the control voltage VAGC rises to a first reference voltage Vrefl, a first output current Il will rise and the third output current 13 will fall. 放大器35将根据第一输出电流Il及第三输出电流13的间的变化而切换增益,使得放大器35可达成两级或多级增益切换的目的。 The gain of the amplifier 35 is switched according to a change between the first and the third output current of the output current Il 13 such that amplifier 35 may be two or more stages to achieve the purpose of gain switching.

[0084] 放大器35包括有一第一接收晶体管351、一第二接收晶体管353、一第一放大晶体管355及一第二放大晶体管356。 [0084] The amplifier 35 includes a transistor 351 receives a first, a second receiving transistor 353, a first amplification transistor 355 and a second amplifying transistor 356. 其中第一放大晶体管355的栅极端连接一第一负载电阻352,而第二放大晶体管356的栅极端则连接一第二负载电阻354,此外第二放大晶体管356 的源极端尚连接一电阻358。 Wherein the gate terminal of the first amplifying transistor 355 is connected to a first load resistor 352, and the gate terminal of the second amplifying transistor 356 is connected to a second load resistor 354, in addition to the source terminal of the second amplifier transistor 356 is still connected to a resistor 358. 第一接收晶体管351及第二接收晶体管353分别接收偏压电路300所提供的第一输出电流Il及第三输出电流13,其中,第二接收晶体管353尚连接一电阻357。 Receiving the first and the second transistor 351 receives the output transistor 353 receive the first and the third output current of the current Il bias circuit 300 provides 13, wherein the second transistor 353 is still receiving a resistor 357 is connected.

[0085] 在实际应用时接收讯号由放大器35的输入端输入,放大器35将会对接收讯号进行放大,并于放大器35的输出端输出一放大讯号。 [0085] receive signals from the input terminal of the input amplifier 35, the amplifier 35 will amplify the received signal, and outputs to the output terminal of the amplifier 35 amplifies a signal in the practical application. 放大器35的增益主要是由第一输出电流Il及第三输出电流13来进行调整,第一输出电流Il及第三输出电流13的大小将会影响第一放大晶体管355及第二放大晶体管356的栅极电压,藉此将可以达到改变放大器35 增益的目的。 The gain of the amplifier 35 is mainly adjusted to 13 by the first output current and the third output current Il, will affect the size of the output current Il of the first and the third output current of the amplifier transistor 13 of the first 355 and the second amplifying transistor 356 the gate voltage, whereby the gain of the amplifier 35 can achieve the purpose of change.

[0086] 在本发明实施例中,第二放大晶体管356连接有一电阻358,而在本发明另一实施例中,该电阻358亦可以一调整单元(250,如图4所示)进行取代,藉此将可以增加放大器35增益的调整范围与增强放大器线性度表现。 [0086] In an embodiment of the present invention, the second amplifying transistor 356 is connected to a resistor 358, and in another embodiment of the present invention, the resistor 358 can also be an adjusting unit (250, FIG. 4) is substituted, the adjustment range can be increased whereby the gain of the amplifier 35 and the booster linearity performance.

[0087] 请参阅图10及图11,分别为本发明偏压电路又一实施例的电路图及输出电流曲线图。 [0087] Please refer to FIGS. 10 and 11, respectively, and the output current of a circuit diagram of an example of a graph of still another embodiment of the bias circuit of the present invention. 本发明实施例所述的偏压电路400相较于图7所述的偏压电路(300)相异的处在于增设一晶体管41,例如为一P通道晶体管。 Example bias circuit 400 of the embodiment of the present invention as compared to FIG. 7, the bias circuit (300) that the addition of a distinct transistor 41, for example, a P-channel transistor. 该晶体管41的栅极端连接第二电流镜316,并与第二电流镜316的晶体管的栅极相连接,此外,晶体管41尚与第一电流镜315相连接。 The gate terminal of transistor 41 is connected to a second current mirror 316, and is connected to the gate of the transistor of the second current mirror 316, and further, the transistor 41 is still connected to the first current mirror 315.

[0088] 晶体管41将会映像第一差动单元314上的电流Ib而产生一电流If,并将电流If 回授至第一电流镜315。 [0088] The current Ib of transistor 41 will be mapped on a first differential unit 314 generates a current If, and the feedback current If to the first current mirror 315. 藉此第一电流镜315所产生的第一输出电流Il将不会随着控制电压VAGC的持续降低而出现趋近于零的情况,并形成如图11所示的输出电流曲线。 Whereby the first output current Il to produce the first current mirror 315 will not continue to decrease as the control voltage VAGC to occur close to zero, and forming an output current curve 11 shown in FIG. 相较之下图9为图7所述的偏压电路(300)的输出电流曲线,其中第一输出电流Il将会因为控制电压VAGC的持续下降而有趋近于零的现象,当第一输出电流Il为零的时候将会对放大器(35)增益的线性度造成影响,而藉由本发明实施例的晶体管41的设置将可避免上述问题的发生。 FIG 9 is a comparison under the bias circuit according to FIG. 7 (300) of the output current curve, wherein the first output current Il will decrease because the control voltage VAGC is continued while the phenomenon approaches zero, when the first Il is zero when the output current is likely to affect the amplifier (35) gain linearity, the present invention is provided by the transistor 41 of the embodiment can avoid these problems.

[0089] 在本发明实施例中,当电流Ia减小的同时电流Ib将会增加,此时晶体管41则会映射电流Ib而产生电流If,并将电流If回授至第一电流镜315,藉此第一电流镜315所输出的第一输出电流Il将不会为零。 [0089] In an embodiment of the present invention, when the current Ia decreases while the current Ib will increase, when the transistor 41 will map the current Ib generated current If, and the feedback current If to the first current mirror 315, whereby the first output current Il of the first current mirror output 315 will not be zero.

[0090] 请参阅图12,为本发明偏压电路与放大器的方块示意图。 [0090] Please refer to FIG. 12, a block schematic diagram of a bias circuit of the amplifier of the present invention. 如图所示,无线收发器50包括有一偏压电路500、放大器35及天线27,其中偏压电路500包括有一第一级偏压单元51,而放大器35分别与第一级偏压单元51及天线27相连接。 As shown, the radio transceiver 50 includes a bias circuit 500, an amplifier 35 and an antenna 27, wherein the bias circuit 500 comprises a first stage biasing unit 51, and the amplifier stage 35 with the first biasing means 51 and The antenna 27 is connected.

[0091] 第一级偏压单元51用以接收一定电流Is、一控制电压VAGC及一第一参考电压Vrefl,并依据一定电流Is、一控制电压VAGC及一第一参考电压Vrefl而产生一第一输出电流Il及第二输出电流12。 [0091] The first stage of the bias unit 51 for receiving a constant current Is, a first control voltage VAGC and a reference voltage Vrefl, and based on a constant current Is, a first control voltage VAGC and a reference voltage to generate a first Vrefl an output current Il and the second output current 12. 控制电压VAGC为一可变电压,透过控制电压VAGC的改变将可以对第一输出电流Il及第二输出电流12的大小进行调整,使得第一输出电流Il及第二 The control voltage VAGC is a variable voltage, can be changed by controlling the magnitude of the first voltage VAGC output current Il and the second output current 12 is adjusted such that the first and second output current Il

10输出电流12为一类比的输出曲线,并可以第一输出电流Il及第二输出电流12控制放大器35的增益。 10 is an analog output current 12 output curve, and may output a first current Il and the second output current 12 controls the gain of amplifier 35.

[0092] 最后,请参阅图13,为本发明偏压电路与放大器的电路图。 [0092] Finally, referring to FIG 13, a circuit diagram of a bias circuit of the amplifier of the present invention. 如图所示,偏压电路500包括有一定电流单元511、一第一差动单元514、一第一电流镜515及一第二电流镜518,而放大器35分别与第一电流镜515及第二电流镜518相连接,并接收第一输出电流Il 及第二输出电流12。 As shown, the bias circuit 500 comprises a constant current unit 511, a first differential unit 514, a first current mirror 515 and a second current mirror 518, and the amplifier 35 with the first and second current mirror 515 second current mirror 518 is connected to, and receives the first output current and the second output current Il 12. 另外,偏压电路500所输出的第一输出电流Il及第二输出电流12的曲线如图5所示,并可以第一输出电流Il及第二输出电流12控制放大器35的增益。 Further, the output current Il of the first bias circuit output 500 and a second output current curve 12 shown in Figure 5, and may output a first current Il and the second output current 12 controls the gain of amplifier 35.

[0093] 本发明上述实施例的偏压电路不仅可应用于无线收发器的前端电路的放大器,亦可应用于无线收发器的后端电路的放大器。 The bias circuit [0093] The above-described embodiments of the present invention may be applied not only to a front end amplifier circuit radio transceiver, also be applied to the rear end of the amplifier circuit of the wireless transceiver. 此外本发明所述的偏压电路可产生一以类比方式改变的输出电流或输出电压,因此可适用于各种放大器以进行放大器增益的调整,并可将输出电流、输出电压及/或放大器的瞬时反应降到最低,以提高整体的工作效率。 In addition to the bias circuit of the present invention produce an output current or an output voltage change by analogy, therefore applicable to various amplifiers to adjust the amplifier gain, and the output current, output voltage and / or amplifier instantaneous reaction to a minimum, in order to improve overall efficiency.

[0094] 当然,本发明还可有其它多种实施例,在不背离本发明精神及其实质的情况下,熟悉本领域的技术人员当可根据本发明作出各种相应的改变和变形,但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。 [0094] Of course, the present invention may have a variety of other embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding modifications and variations according to the present invention, but these corresponding changes and variations should fall within the scope of the appended claims.

Claims (21)

  1. 一种无线收发器的偏压电路,包括有一第一级偏压单元用以接收一定电流、一控制电压及一第一参考电压,并依据所接收的定电流、控制电压及第一参考电压而产生一第一输出电流,其特征在于,该第一输出电流的大小是由该控制电压所控制,并以类比的方式进行该第一输出电流的调升或调降,以使该第一输出电流的输出曲线与该控制电压的控制相符;该第一级偏压单元还会依据该定电流、该控制电压及该第一参考电压而产生一第二输出电流;该偏压电路包括有至少一第二级偏压单元与该第一级偏压单元相连接,并用以接收该控制电压、一第二参考电压及该第二输出电流,以产生一第三输出电流,且该第三输出电流是以类比的方式进行调升或调降,以使该第三输出电流的输出曲线与该控制电压的控制相符。 A radio transceiver bias circuit, comprising a first stage unit receives a constant current bias, a control voltage and a first reference voltage, and a constant current according to the received control voltage and a first reference voltage generating a first output current, wherein the magnitude of the first output current is controlled by the control voltage, and in a manner analogous to the first output current is raised or lowered, so that the first output consistent control of the output current curve of the control voltage; the first stage unit also according to the bias constant current, the control voltage and the first reference voltage to generate a second output current; the bias circuit comprises at least a second stage connected to the biasing means biasing the first stage unit, and for receiving the control voltage, a second reference voltage and the second output current to generate a third output current, and the third output analog current is lowered or raised manner, so that the output current curve of the third output matching with the control voltage.
  2. 2.如权利要求1所述的偏压电路,其特征在于,该第一级偏压单元与一放大器相连接, 并以该第一输出电流控制该放大器的增益。 2. The bias circuit according to claim 1, wherein the first biasing unit and an amplifier stage connected to the first output and a current control gain of the amplifier.
  3. 3.如权利要求2所述的偏压电路,其特征在于,尚包括有一转换器设置于该第一级偏压单元及该放大器之间,并以该转换器将该第一输出电流转换成为一调整电压,而该放大器的增益会随着该调整电压的大小而改变。 3. The bias circuit according to claim 2, characterized in that the transducer comprises a still disposed between the first amplifier stage and said biasing means, and in that the converter output current is converted into a first a voltage adjustment, the gain of the amplifier will vary with the magnitude of the adjustment voltage is changed.
  4. 4.如权利要求1所述的偏压电路,其特征在于,该第一级偏压单元与一转换器相连接, 该转换器用以将该第一输出电流转换成一调整电压。 4. The bias circuit according to claim 1, wherein the first stage unit and a bias voltage is connected to the converter, the converter for converting the output current into a first voltage adjustment.
  5. 5.如权利要求1所述的偏压电路,其特征在于,该第一级偏压单元与一放大器相连接, 并以该第一输出电流及该第二输出电流控制该放大器的增益。 5. The bias circuit according to claim 1, wherein the first biasing unit and an amplifier stage connected to the first output and the second output current and a current control gain of the amplifier.
  6. 6.如权利要求1所述的偏压电路,其特征在于,该第一级偏压单元及该第二级偏压单元与一放大器相连接,该放大器的增益会随着该第一输出电流及该第三输出电流的大小而改变。 6. The bias circuit as claimed in claim 1, the gain of the amplifier will vary with the first output current, characterized in that the first stage and the second stage biasing means biasing unit connected to an amplifier, and the magnitude of the third output current changes.
  7. 7. 一种无线收发器的偏压电路,其特征在于,包括有:一定电流单元,用以产生一偏压电流;一第一差动单元,连接该定电流单元,并接收一控制电压、一参考电压及该偏压电流;一第一电流镜,连接该第一差动单元,并产生一第一输出电流,该第一输出电流的大小是由该控制电压所控制,并以类比的方式进行该第一输出电流的调升或调降,以使该第一输出电流的输出曲线与该控制电压的控制相符;一负载单元,与该第一差动单元相连接。 A bias circuit of the wireless transceiver, wherein, comprising: a constant current means for generating a bias current; a first differential unit connected to the constant current unit, and receives a control voltage, a reference voltage and the bias current; a first current mirror, connected to the first differential unit, and generating a first output current, the magnitude of the first output current is controlled by the control voltage, and to analogy way of the first output current is raised or lowered, so that the output curve of the first output current is consistent with the control voltage; a load unit, connected to the first differential unit.
  8. 8.如权利要求7所述的偏压电路,其特征在于,该定电流单元包括有一电流镜电路及一定电流源的连接。 8. The bias circuit according to claim 7, wherein the constant current means comprises a current mirror circuit and connected to a constant current source.
  9. 9.如权利要求7所述的偏压电路,其特征在于,该第一电流镜与一放大器相连接,并以第一输出电流控制该放大器的增益。 9. The bias circuit according to claim 7, wherein the first current mirror is connected to an amplifier, and a first output current to control the gain of the amplifier.
  10. 10.如权利要求9所述的偏压电路,其特征在于,该第一电流镜与该放大器间尚设置一转换器,该转换器用以将该第一输出电流转换成一调整电压。 10. The bias circuit according to claim 9, characterized in that a converter is still provided between the first current mirror with the amplifier, the converter for converting the output current into a first voltage adjustment.
  11. 11.如权利要求10所述的偏压电路,其特征在于,该转换器包括有一电阻及一晶体管的串联。 11. The bias circuit according to claim 10, wherein the transducer comprises a resistor and a transistor connected in series.
  12. 12.如权利要求11所述的偏压电路,其特征在于,该转换器尚包括有一电容,而该电容与该电阻及该晶体管并联。 12. The bias circuit according to claim 11, wherein the transducer comprises a capacitance still, and the resistor and the capacitor and the transistor in parallel.
  13. 13.如权利要求9所述的偏压电路,其特征在于,该放大器包括有一调整单元。 13. The bias circuit according to claim 9, wherein the amplifier comprises an adjusting unit.
  14. 14.如权利要求7所述的偏压电路,其特征在于,该负载单元可选择为一晶体管、一电阻及一第二电流镜的其中的一者。 14. The bias circuit according to claim 7, wherein the load unit is a select transistor, a resistor and a second current mirror, wherein one of.
  15. 15.如权利要求7所述的偏压电路,其中该负载单元为一第二电流镜并用以输出一第二输出电流。 15. The bias circuit according to claim 7, wherein the load unit is a second current mirror, and for outputting a second output current.
  16. 16.如权利要求15所述的偏压电路,其特征在于,该第一电流镜及该第二电流镜与一放大器相连接,并以该第一输出电流及该第二输出电流控制该放大器的增益。 16. The bias circuit according to claim 15, wherein the first current mirror and the second current mirror and an amplifier connected to the first output and the second output current and controls the current amplifier gain.
  17. 17. 一种无线收发器的偏压电路,其特征在于,包括有:一第一级偏压单元,包括有:一定电流单元,用以产生一偏压电流;一第一差动单元,连接该定电流单元,并接收一控制电压、一第一参考电压及该定电流单元所产生的偏压电流;一第一电流镜,连接该第一差动单元,并产生一第一输出电流,该第一输出电流的大小是由该控制电压所控制,并以类比的方式进行该第一输出电流的调升或调降,以使该第一输出电流的输出曲线与该控制电压的控制相符;一第二电流镜,连接该第一差动单元,并产生一第二电流;至少一第二级偏压单元,包括有:一第三电流镜,连接该第二电流镜,并接收该第二电流镜所产生的第二电流;一第二差动单元,连接该第三电流镜,并接收该控制电压及一第二参考电压;一负载单元,连接该第二差动单元;一第四电流镜, 17. A wireless transceiver bias circuit comprising: a first stage bias means comprises: a constant current means for generating a bias current; a first differential unit, connected to the constant current unit, and receives a control voltage, a first bias current and the reference voltage generated by the constant current unit; a first current mirror, connected to the first differential unit, and generating a first output current, the magnitude of the first output current is controlled by the control voltage, and in a manner analogous to the first output current is raised or lowered, so that the control of the output curve matching with the first output current control voltage ; a second current mirror, connected to the first differential unit, and generating a second current; at least a second stage biasing means comprises: a third current mirror, the second current mirror connection, and receives the a second current generated by the second current mirror; a second differential unit, connected to the third current mirror, and receives the control voltage and a second reference voltage; a load unit, connected to the second differential unit; a The fourth current mirror, 连接该第二差动单元,并产生一第三输出电流,该第三输出电流的大小是由该控制电压所控制,并以类比的方式进行该第三输出电流的调升或调降,以使该第三输出电流的输出曲线与该控制电压的控制相符。 Connected to the second differential unit, and generates a third output current, the size of the third output current is controlled by the control voltage, and in a manner analogous to the third output current is raised or lowered, in order to the third control output current matches the curve of the output control voltage.
  18. 18.如权利要求17所述的偏压电路,其特征在于,该定电流单元包括有一电流镜电路及一定电流源的连接。 18. The bias circuit according to claim 17, wherein the constant current means comprises a current mirror circuit and connected to a constant current source.
  19. 19.如权利要求17所述的偏压电路,其特征在于,该第一级偏压单元及第二级偏压单元连接一放大器,该放大器的增益会随着该第一输出电流及该第三输出电流而改变。 19. The bias circuit according to claim 17, wherein the first and second two-stage biasing means biasing unit connected to an amplifier, the gain of the amplifier will vary with the first and the second output current three output current changes.
  20. 20.如权利要求19所述的偏压电路,其特征在于,该放大器尚包括有一调整单元。 20. The bias circuit according to claim 19, characterized in that the amplifier still comprises an adjusting unit.
  21. 21.如权利要求17所述的偏压电路,其特征在于,包括有一晶体管,其栅极端连接该第二电流镜而漏极端则连接第一电流镜。 21. The bias circuit according to claim 17, characterized in that it comprises a transistor whose gate terminal connected to the second current mirror and the drain terminal of the first current mirror is connected.
CN 200710162868 2007-10-16 2007-10-16 Radio transceiver bias circuit CN101150329B (en)

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US8669808B2 (en) * 2009-09-14 2014-03-11 Mediatek Inc. Bias circuit and phase-locked loop circuit using the same
CN103872992B (en) * 2012-12-10 2017-02-08 环旭电子股份有限公司 Electronic systems, radio frequency power amplifiers and output power Compensation

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CN1750391A (en) 2005-10-26 2006-03-22 威盛电子股份有限公司 Variable gain amplifying circuit and relative method
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CN1849742A (en) 2003-07-10 2006-10-18 崇贸科技股份有限公司 PFC-PWM controller having a power saving means
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CN2438134Y (en) 2000-08-04 2001-07-04 浙江星月动力机械有限公司 Indicator type voltmeter for moped
US20060061408A1 (en) 2002-09-27 2006-03-23 Oki Electric Industry Co., Ltd. Bias circuit
CN1729618A (en) 2002-12-19 2006-02-01 皇家飞利浦电子股份有限公司 Power amplifier for bias control
CN1849742A (en) 2003-07-10 2006-10-18 崇贸科技股份有限公司 PFC-PWM controller having a power saving means
CN1610251A (en) 2003-10-16 2005-04-27 株式会社瑞萨科技 High frequency power amplifier circuit and electronic component for high frequency power amplifier
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