CN103151987A - High precision linear amplifier - Google Patents

High precision linear amplifier Download PDF

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Publication number
CN103151987A
CN103151987A CN2013100850995A CN201310085099A CN103151987A CN 103151987 A CN103151987 A CN 103151987A CN 2013100850995 A CN2013100850995 A CN 2013100850995A CN 201310085099 A CN201310085099 A CN 201310085099A CN 103151987 A CN103151987 A CN 103151987A
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CN
China
Prior art keywords
resistance
operational amplifier
resistor
electric capacity
potentiometer
Prior art date
Application number
CN2013100850995A
Other languages
Chinese (zh)
Inventor
樊勇
Original Assignee
成都龙腾中远信息技术有限公司
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Publication date
Application filed by 成都龙腾中远信息技术有限公司 filed Critical 成都龙腾中远信息技术有限公司
Priority to CN2013100850995A priority Critical patent/CN103151987A/en
Publication of CN103151987A publication Critical patent/CN103151987A/en

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Abstract

The invention discloses a high precision linear amplifier which comprises a first operational amplifier, a second operational amplifier, a third operational amplifier, a first transistor, a second transistor, a first potentiometer, a second potentiometer, a third potentiometer, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor. With the adoption of the technical scheme, the amplifier is high in amplification precision and linearity; the working efficiency of the amplifier is improved; and the amplifier can meet requirements of 3G (The 3rd Generation) base stations on the linearity and output power.

Description

High-precise linear amplifier

Technical field

The present invention relates to a kind of linear amplifier, particularly relate to a kind of high-precise linear amplifier.

Background technology

The extensive use of non-permanent envelope and multi-carrier modulation technology makes the RF signal present very high peak-to-average force ratio and envelope variation fast, causes whole system to non-linear very responsive.In order to guarantee the linearity, traditional amplifier must operate at larger power output rollback point, and this makes efficiency of amplitude greatly reduce, and has increased the operating cost of NodeB.The efficient of existing amplifier and the linearity have and can not satisfy the demand.

Novel content

The high-precise linear amplifier that provides a kind of high power, high efficiency and the linearity high in order to address the above problem is provided.

The present invention is achieved by the following technical solutions:

a kind of high-precise linear amplifier comprises the first operational amplifier, the second operational amplifier, the 3rd operational amplifier, the first transistor, transistor seconds, the first potentiometer, the second potentiometer, the 3rd potentiometer, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance, the 19 resistance, the 20 resistance, the 21 resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity, the first end of described the first resistance are output, and the second end of described the first resistance is connected with the first end of described the first potentiometer, the sliding end of described the first potentiometer respectively with the first end of described the first electric capacity, the second end of the first potentiometer be connected the second resistance first end be connected the first end of the 5th resistance and connect, the second end of described the second resistance respectively with the first end of described the 21 resistance, the emitter of transistor seconds be connected the first end of the 3rd resistance and connect, the second end of described the 3rd resistance respectively with the first end of described the 4th resistance, the first end of the second potentiometer, the first end of the sliding end of the second potentiometer and the 7th resistance connects, the second end of described the 7th resistance is connected with the second pin of described the first operational amplifier, the first pin of described the first operational amplifier is connected with the first end of described the 6th resistance, the second end of described the 6th resistance respectively with the first end of described the 5th resistance be connected the second end of the first electric capacity and be connected, the 3rd pin of described the first operational amplifier is connected with the first end of described the 9th resistance, the second end of described the 9th resistance respectively with the first end of described the 8th resistance be connected the first end of the 3rd potentiometer and be connected, the second end of described the 8th resistance respectively with the sliding end of described the 3rd potentiometer and the first end of described the tenth resistance, the first end of the 4th electric capacity be connected the 5th pin of the first operational amplifier and connect, the second end ground connection of described the 4th electric capacity, the 8th pin of described the first operational amplifier is connected with the first end of described the 3rd electric capacity, the second end of described the 3rd electric capacity is connected with power cathode after the 7th pin of the first operational amplifier is connected with being connected with the first end of described the second electric capacity respectively, the 6th pin of described the first operational amplifier respectively with the first end of described the 13 resistance be connected the first end of the 12 resistance and be connected, the second end of described the 12 resistance is connected with the first end of described the 5th electric capacity, the second end ground connection of described the 5th electric capacity, the second end of described the 13 resistance respectively with the first end of described the 14 resistance be connected the negative pole of the second operational amplifier and be connected, the output of described the second operational amplifier is connected with the base stage of described the first transistor, the collector electrode of described the first transistor respectively with the first end of described the 16 resistance be connected the first end of the 18 resistance and be connected, the second end of described the 16 resistance respectively with the second end of described the 13 resistance, the second end of the 14 resistance be connected the negative pole of the second operational amplifier and connect, the second end of described 18 resistance respectively with the first end of described the 21 resistance be connected the negative pole of the 3rd operational amplifier and be connected, the positive pole of described the 3rd operational amplifier is connected with the first end of described the 19 resistance, the second end ground connection of described the 19 resistance, the collector electrode of described the first transistor is connected with the first end of described the 17 resistance, and the second end of described the 17 resistance is connected with the 7th pin of described the first operational amplifier.

Further, the normal phase input end of described the second operational amplifier is connected with the first end of described the 6th electric capacity, the second end ground connection of described the 6th electric capacity, the inverting input of described the second operational amplifier is connected with the first end of described the 7th electric capacity, the second end ground connection of described the 7th electric capacity.

Further, the normal phase input end of described the 3rd operational amplifier is connected with the first end of the 8th electric capacity respectively, the second end ground connection of described the 8th electric capacity, the inverting input of described the 3rd operational amplifier is connected with the first end of described the 9th electric capacity, the second end ground connection of described the 9th electric capacity.

The invention has the beneficial effects as follows:

By adopting technique scheme, amplification accuracy of the present invention and the linearity are high, have improved the operating efficiency of amplifier, can satisfy in NodeB the requirement to the linearity and power output.

Description of drawings

Fig. 1 is the circuit diagram of high-precise linear amplifier of the present invention.

Embodiment

The present invention is described in further detail below in conjunction with drawings and the specific embodiments:

as shown in Figure 1, high-precise linear amplifier of the present invention, comprise the first operational amplifier A 1, the second operational amplifier A 2, the 3rd operational amplifier A 3, the first transistor VT1, transistor seconds VT2, the first potentiometer RP1, the second potentiometer RP2, the 3rd potentiometer RP3, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the 18 resistance R 18, the 19 resistance R 19, the 20 resistance R 20, the 21 resistance R 21, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4 and the 5th capacitor C 5, the first end of described the first resistance R 1 is output, the second end of described the first resistance R 2 is connected with the first end of described the first potentiometer RP1, the sliding end of described the first potentiometer RP1 respectively with the first end of described the first capacitor C 1, the second end of the first potentiometer RP1 be connected the second resistance R 2 first end be connected the first end of the 5th resistance R 5 and connect, the second end of described the second resistance R 2 respectively with the first end of described the 21 resistance R 21, the emitter of transistor seconds VT2 be connected the first end of the 3rd resistance R 3 and connect, the second end of described the 3rd resistance R 3 respectively with the first end of described the 4th resistance R 4, the first end of the second potentiometer RP2, the first end of the sliding end of the second potentiometer RP2 and the 7th resistance R 7 connects, the second end of described the 7th resistance R 7 is connected with the second pin of described the first operational amplifier A 1, the first pin of described the first operational amplifier A 1 is connected with the first end of described the 6th resistance R 6, the second end of described the 6th resistance R 6 respectively with the first end of described the 5th resistance R 5 be connected the second end of the first capacitor C 1 and be connected, the 3rd pin of described the first operational amplifier A 1 is connected with the first end of described the 9th resistance R 9, the second end of described the 9th resistance R 9 respectively with the first end of described the 8th resistance R 8 be connected the first end of the 3rd potentiometer RP3 and be connected, the second end of described the 8th resistance R 8 respectively with the sliding end of described the 3rd potentiometer RP3 and the first end of described the tenth resistance R 10, the first end of the 4th capacitor C 4 be connected the 5th pin of the first operational amplifier A 1 and connect, the second end ground connection of described the 4th capacitor C 4, the 8th pin of described the first operational amplifier A 1 is connected with the first end of described the 3rd capacitor C 3, the second end of described the 3rd capacitor C 3 is connected with power cathode after the 7th pin of the first operational amplifier A 1 is connected with being connected with the first end of described the second capacitor C 2 respectively, the 6th pin of described the first operational amplifier A 1 respectively with the first end of described the 13 resistance R 13 be connected the first end of the 12 resistance R 12 and be connected, the second end of described the 12 resistance R 12 is connected with the first end of described the 5th capacitor C 5, the second end ground connection of described the 5th capacitor C 5, the second end of described the 13 resistance R 13 respectively with the first end of described the 14 resistance R 14 be connected the negative pole of the second operational amplifier A 2 and be connected, the output of described the second operational amplifier A 2 is connected with the base stage of described the first transistor VT1, the collector electrode of described the first transistor VT1 respectively with the first end of described the 16 resistance R 16 be connected the first end of the 18 resistance R 18 and be connected, the second end of described the 16 resistance R 16 respectively with the second end of described the 13 resistance R 13, the second end of the 14 resistance R 14 be connected the negative pole of the second operational amplifier A 2 and connect, the second end of described 18 resistance R 18 respectively with the first end of described the 21 resistance R 21 be connected the negative pole of the 3rd operational amplifier A 3 and be connected, the positive pole of described the 3rd operational amplifier A 3 is connected with the first end of described the 19 resistance R 19, the second end ground connection of described the 19 resistance R 19, the collector electrode of described the first transistor VT1 is connected with the first end of described the 17 resistance R 17, the second end of described the 17 resistance R 17 is connected with the 7th pin of described the first operational amplifier A 1.

The normal phase input end of described the second operational amplifier A 2 is connected with the first end of described the 6th capacitor C 6, the second end ground connection of described the 6th capacitor C 6, the inverting input of described the second operational amplifier A 2 is connected with the first end of described the 7th capacitor C 7, the second end ground connection of described the 7th capacitor C 7.

The normal phase input end of described the 3rd operational amplifier A 3 is connected with the first end of the 8th capacitor C 8 respectively, the second end ground connection of described the 8th capacitor C 8, the inverting input of described the 3rd operational amplifier A 3 is connected with the first end of described the 9th capacitor C 9, the second end ground connection of described the 9th capacitor C 9.

Claims (3)

1. a high-precise linear amplifier, is characterized in that: comprise the first operational amplifier, the second operational amplifier, the 3rd operational amplifier, the first transistor, transistor seconds, the first potentiometer, the second potentiometer, the 3rd potentiometer, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance, the 19 resistance, the 20 resistance, the 21 resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity, the first end of described the first resistance are output, and the second end of described the first resistance is connected with the first end of described the first potentiometer, the sliding end of described the first potentiometer respectively with the first end of described the first electric capacity, the second end of the first potentiometer be connected the second resistance first end be connected the first end of the 5th resistance and connect, the second end of described the second resistance respectively with the first end of described the 21 resistance, the emitter of transistor seconds be connected the first end of the 3rd resistance and connect, the second end of described the 3rd resistance respectively with the first end of described the 4th resistance, the first end of the second potentiometer, the first end of the sliding end of the second potentiometer and the 7th resistance connects, the second end of described the 7th resistance is connected with the second pin of described the first operational amplifier, the first pin of described the first operational amplifier is connected with the first end of described the 6th resistance, the second end of described the 6th resistance respectively with the first end of described the 5th resistance be connected the second end of the first electric capacity and be connected, the 3rd pin of described the first operational amplifier is connected with the first end of described the 9th resistance, the second end of described the 9th resistance respectively with the first end of described the 8th resistance be connected the first end of the 3rd potentiometer and be connected, the second end of described the 8th resistance respectively with the sliding end of described the 3rd potentiometer and the first end of described the tenth resistance, the first end of the 4th electric capacity be connected the 5th pin of the first operational amplifier and connect, the second end ground connection of described the 4th electric capacity, the 8th pin of described the first operational amplifier is connected with the first end of described the 3rd electric capacity, the second end of described the 3rd electric capacity is connected with power cathode after the 7th pin of the first operational amplifier is connected with being connected with the first end of described the second electric capacity respectively, the 6th pin of described the first operational amplifier respectively with the first end of described the 13 resistance be connected the first end of the 12 resistance and be connected, the second end of described the 12 resistance is connected with the first end of described the 5th electric capacity, the second end ground connection of described the 5th electric capacity, the second end of described the 13 resistance respectively with the first end of described the 14 resistance be connected the negative pole of the second operational amplifier and be connected, the output of described the second operational amplifier is connected with the base stage of described the first transistor, the collector electrode of described the first transistor respectively with the first end of described the 16 resistance be connected the first end of the 18 resistance and be connected, the second end of described the 16 resistance respectively with the second end of described the 13 resistance, the second end of the 14 resistance be connected the negative pole of the second operational amplifier and connect, the second end of described 18 resistance respectively with the first end of described the 21 resistance be connected the negative pole of the 3rd operational amplifier and be connected, the positive pole of described the 3rd operational amplifier is connected with the first end of described the 19 resistance, the second end ground connection of described the 19 resistance, the collector electrode of described the first transistor is connected with the first end of described the 17 resistance, and the second end of described the 17 resistance is connected with the 7th pin of described the first operational amplifier.
2. a kind of high-precise linear amplifier according to claim 1, it is characterized in that: the normal phase input end of described the second operational amplifier is connected with the first end of described the 6th electric capacity, the second end ground connection of described the 6th electric capacity, the inverting input of described the second operational amplifier is connected with the first end of described the 7th electric capacity, the second end ground connection of described the 7th electric capacity.
3. a kind of high-precise linear amplifier according to claim 1, it is characterized in that: the normal phase input end of described the 3rd operational amplifier is connected with the first end of the 8th electric capacity respectively, the second end ground connection of described the 8th electric capacity, the inverting input of described the 3rd operational amplifier is connected with the first end of described the 9th electric capacity, the second end ground connection of described the 9th electric capacity.
CN2013100850995A 2013-03-18 2013-03-18 High precision linear amplifier CN103151987A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013100850995A CN103151987A (en) 2013-03-18 2013-03-18 High precision linear amplifier

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Application Number Priority Date Filing Date Title
CN2013100850995A CN103151987A (en) 2013-03-18 2013-03-18 High precision linear amplifier

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101072013A (en) * 2007-04-25 2007-11-14 山东新风光电子科技发展有限公司 Linear amplifier and its high power pulse power source
US20100090766A1 (en) * 2008-10-09 2010-04-15 Maxim Integrated Products, Inc. Self configuring output stages of precision amplifiers
CN101904092A (en) * 2007-12-20 2010-12-01 北电网络有限公司 Linearizing power amplifier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101072013A (en) * 2007-04-25 2007-11-14 山东新风光电子科技发展有限公司 Linear amplifier and its high power pulse power source
CN101904092A (en) * 2007-12-20 2010-12-01 北电网络有限公司 Linearizing power amplifier
US20100090766A1 (en) * 2008-10-09 2010-04-15 Maxim Integrated Products, Inc. Self configuring output stages of precision amplifiers

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Application publication date: 20130612