CN107634737B - Inverter for millimeter wave LO drive - Google Patents
Inverter for millimeter wave LO drive Download PDFInfo
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- CN107634737B CN107634737B CN201710888376.4A CN201710888376A CN107634737B CN 107634737 B CN107634737 B CN 107634737B CN 201710888376 A CN201710888376 A CN 201710888376A CN 107634737 B CN107634737 B CN 107634737B
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention relates to an inverter for millimeter wave LO driving, which comprises an inverter amplifier connected with an input end and an output end, wherein the inverter amplifier is connected to a first feedback circuit through a first resistor and is also connected to a second feedback circuit through a second resistor, the first feedback circuit and the second feedback circuit are both connected with input regulating current, the regulating current is respectively converted into a regulating voltage Vbn and a regulating voltage Vbp through the first feedback circuit and the second feedback circuit, the regulating voltage Vbp and the regulating voltage Vbp regulate the transconductance of the inverter amplifier, the transconductance of the inverter amplifier can be controlled through regulating the input regulating current, the output DC working point is stabilized at half of the power supply voltage through the first feedback branch and the second feedback circuit, and the application in a low-frequency range can be increased because the regulating current is used for fine tuning the transconductance to give the whole inverter amplifier additional regulating margin.
Description
Technical Field
The invention relates to an inverter for millimeter wave LO driving, and belongs to the technical field of communication.
Background
As the COMS process channel length decreases, transistors can operate faster and faster, and inverting differential pairs have become widely used in digital circuits, as shown in fig. 1, and now become increasingly important in high frequency signal processing. Has been widely used in circuits such as active filters and buffer amplifiers, which provide higher efficiency because the nfets and pfets of the inverter amplifier can provide transconductance at the same time than conventional transconductance amplifiers.
In order to obtain better linearity, the operation of the output node is often set to be half of the supply voltage, and since the gates of nfets and pfets are the same node and have high dc gain, the bias of the inverter is easily affected by the process corner, and especially when the multi-stage amplifier is cascaded, stability becomes a potential problem for the system.
As the differential inverting amplifier differential mode gain can be increased by reducing the common mode gain, such a 6-stage cascaded inverter amplifier as shown in fig. 2 can be used in low frequency range applications, however, for millimeter wave amplifiers, the additional feedback circuit adds twice the capacitive load, which would severely affect the gain and bandwidth of the amplifier.
Disclosure of Invention
The invention aims to solve the technical problems that: to overcome the above problems, an inverter for millimeter wave LO driving is provided.
The technical scheme adopted for solving the technical problems is as follows:
an inverter for millimeter wave LO driving, comprising an inverter amplifier connected to an input terminal and an output terminal, the inverter amplifier being connected to a first feedback circuit through a first resistor and also connected to a second feedback circuit through a second resistor, the first feedback circuit and the second feedback circuit both being connected to an input regulation current, the regulation current being converted into a regulation voltage Vbn and a regulation voltage Vbp through the first feedback circuit and the second feedback circuit, respectively, the regulation voltage Vbp and the regulation voltage Vbn regulating the transconductance of the inverter amplifier.
Preferably, the inverter amplifier is connected to the input via a capacitance Cp and a capacitance Cn in parallel.
Preferably, the first feedback circuit includes a transistor M3, a collector of the transistor M3 is connected to the adjusting current Iref through a resistor R5, an emitter of the transistor M3 is grounded, a base of the transistor M3 is connected to one end of a resistor R1, one end of a resistor R2, and a base of the transistor M1, respectively, the other end of the resistor R2 is connected to an output terminal of the operational amplifier Q1 and is also connected to the first resistor output adjusting voltage Vbn, and a non-inverting input terminal of the operational amplifier Q1 is connected to the other end of the resistor R1 and the collector of the transistor M3.
Preferably, the second feedback circuit includes a transistor M2, a collector of the transistor M2 is connected to a collector of the transistor M1, one end of a resistor R3 and a non-inverting input terminal of the operational amplifier Q2, an inverting input terminal of the operational amplifier Q2 is connected to an inverting input terminal of the operational amplifier Q1, a base of the transistor M2 is connected to one end of a resistor R4 and the other end of the resistor R3, respectively, and the other end of the resistor R4 is connected to an output terminal of the operational amplifier Q2 and is also connected to the second resistor output regulation voltage Vbp.
Preferably, the inverting inputs of the operational amplifier Q1 and the operational amplifier Q2 are also both connected between two resistors Rref.
Preferably, the inverter amplifier includes a transistor Mp and a transistor Mn.
The beneficial effects of the invention are as follows: according to the invention, the transconductance of the inverter amplifier can be controlled by adjusting the input adjusting current, the output DC working point is stabilized at half of the power supply voltage through the first feedback branch and the second feedback circuit, and the transconductance of the inverter amplifier is finely adjusted by adjusting the current, so that the application in a low frequency range can be increased.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a circuit diagram of the prior art;
FIG. 2 is another prior art circuit diagram;
FIG. 3 is a schematic diagram of the structure of an embodiment of the present invention;
FIG. 4 is a partial circuit diagram of one embodiment of the present invention;
fig. 5 is a partial circuit diagram of one embodiment of the present invention.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
Example 1
The inverter for millimeter wave LO driving according to the present invention shown in fig. 3 includes an inverter amplifier connected to an input terminal in and an output terminal out, the inverter amplifier is not limited to several cascaded inverter amplifiers, and can be selectively set according to needs, in this embodiment, a two-stage cascaded inverter amplifier is provided, the inverter amplifier is connected to a first feedback circuit through a first resistor Rbn, and is also connected to a second feedback circuit through a second resistor Rbp, the first feedback circuit and the second feedback circuit are both connected to an input adjusting current, the adjusting current is respectively converted into an adjusting voltage Vbn and an adjusting voltage Vbp through the first feedback circuit and the second feedback circuit, the adjusting voltage Vbp and the adjusting voltage Vbn adjust the transconductance of the inverter amplifier, in this embodiment, the transconductance of the inverter amplifier can be controlled by adjusting the input adjusting current, the DC operating point of the output is stabilized at half of the power supply voltage through the first branch and the second feedback circuit, and the adjusting current is added to the low frequency range of the whole inverter amplifier due to fine adjustment of the transconductance through the adjusting current.
In a preferred embodiment, in a specific circuit, the inverter amplifier is connected to the input via a capacitor Cp and a capacitor Cn in parallel, as shown in fig. 4.
In a preferred embodiment, as shown in fig. 5, the first feedback circuit includes a transistor M3, the collector of the transistor M3 is connected to the regulated current Iref through a resistor R5, the emitter of the transistor M3 is grounded, the base of the transistor M3 is connected to one end of a resistor R1, one end of a resistor R2 and the base of the transistor M1, respectively, the other end of the resistor R2 is connected to the output terminal of the operational amplifier Q1 and is also connected to the first resistor output regulated voltage Vbn, and the non-inverting input terminal of the operational amplifier Q1 is connected to the other end of the resistor R1 and the collector of the transistor M3.
In a preferred embodiment, the second feedback circuit includes a transistor M2, a collector of the transistor M2 is connected to a collector of the transistor M1, one end of a resistor R3 and a non-inverting input terminal of the operational amplifier Q2, an inverting input terminal of the operational amplifier Q2 is connected to an inverting input terminal of the operational amplifier Q1, a base of the transistor M2 is connected to one end of a resistor R4 and the other end of the resistor R3, respectively, and the other end of the resistor R4 is connected to an output terminal of the operational amplifier Q2 and is also connected to the second resistor output regulation voltage Vbp.
In a preferred embodiment, the inverting inputs of the operational amplifier Q1 and the operational amplifier Q2 are also both connected between two resistors Rref.
In a preferred embodiment, the inverter amplifier includes a transistor Mp and a transistor Mn.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (4)
1. An inverter for millimeter wave LO driving, comprising an inverter amplifier connected to an input terminal and an output terminal, the inverter amplifier being connected to a first feedback circuit through a first resistor, and being further connected to a second feedback circuit through a second resistor, both the first feedback circuit and the second feedback circuit being connected to an input regulated current, the regulated current being converted into a regulated voltage Vbn and a regulated voltage Vbp by the first feedback circuit and the second feedback circuit, respectively, the regulated voltage Vbp and the regulated voltage Vbn regulating the transconductance of the inverter amplifier, the first feedback circuit comprising a transistor M3, the collector of the transistor M3 being connected to a regulated current Iref through a resistor R5, the emitter of the transistor M3 being grounded, the base of the transistor M3 being connected to one end of the resistor R1, one end of the resistor R2 and the base of the transistor M1, the other end of the resistor R2 being connected to the output terminal of the operational amplifier Q1 and being further connected to the first resistor Vbn, the input terminal of the operational amplifier Q1 being connected to the input terminal of the resistor R3 and the other end of the resistor M2 being connected to the other end of the resistor M4, the collector of the transistor M2 being further connected to the input terminal of the resistor M2 and the resistor M2, the other end of the transistor M2 being further connected to the input terminal of the resistor M2 and the other end of the resistor being further connected to the resistor M2, the base of the resistor being further connected to the resistor M2 being further connected to the input terminal of the resistor being connected to the resistor being further connected to the resistor being connected to the input terminal of the resistor being connected to the resistor and the resistor being connected to the input.
2. The inverter for millimeter wave LO driving of claim 1, wherein the inverter amplifier is connected to the input terminal through a capacitor Cp and a capacitor Cn in parallel.
3. The inverter for millimeter wave LO driving according to claim 1, wherein the inverting inputs of the operational amplifier Q1 and the operational amplifier Q2 are also both connected between two resistors Rref.
4. The inverter for millimeter wave LO driving of claim 1, wherein the inverter amplifier comprises a transistor Mp and a transistor Mn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710888376.4A CN107634737B (en) | 2017-09-27 | 2017-09-27 | Inverter for millimeter wave LO drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710888376.4A CN107634737B (en) | 2017-09-27 | 2017-09-27 | Inverter for millimeter wave LO drive |
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| Publication Number | Publication Date |
|---|---|
| CN107634737A CN107634737A (en) | 2018-01-26 |
| CN107634737B true CN107634737B (en) | 2023-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710888376.4A Active CN107634737B (en) | 2017-09-27 | 2017-09-27 | Inverter for millimeter wave LO drive |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447506A (en) * | 2002-03-26 | 2003-10-08 | 精工爱普生株式会社 | Power circuit and PVVM circuit |
| EP2337228A1 (en) * | 2009-12-17 | 2011-06-22 | Sanyo Electric Co., Ltd. | Receiving apparatus with image frequency rejection |
| CN102394634A (en) * | 2011-09-21 | 2012-03-28 | 浙江大学 | Digital-analog combined control body-bias class-C inverter |
| CN104699162A (en) * | 2015-03-27 | 2015-06-10 | 西安华芯半导体有限公司 | Quick-response low-dropout regulator |
-
2017
- 2017-09-27 CN CN201710888376.4A patent/CN107634737B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447506A (en) * | 2002-03-26 | 2003-10-08 | 精工爱普生株式会社 | Power circuit and PVVM circuit |
| EP2337228A1 (en) * | 2009-12-17 | 2011-06-22 | Sanyo Electric Co., Ltd. | Receiving apparatus with image frequency rejection |
| CN102394634A (en) * | 2011-09-21 | 2012-03-28 | 浙江大学 | Digital-analog combined control body-bias class-C inverter |
| CN104699162A (en) * | 2015-03-27 | 2015-06-10 | 西安华芯半导体有限公司 | Quick-response low-dropout regulator |
Non-Patent Citations (1)
| Title |
|---|
| A 300-mV ΔΣ Modulator Using a Gain-Enhanced, Inverter-Based Amplifier for Medical Implant Devices;Ali Fazli Yeknami等;《Inverter-Based Amplifier for Medical Implant Devices》;20160311;第2页，附图1 * |
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| CN107634737A (en) | 2018-01-26 |
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Effective date of registration: 20181204 Address after: 311121 Room 609A, Building No. 998 Wenyi West Road, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province Applicant after: HANGZHOU ANDA TECHNOLOGY CO.,LTD. Address before: 311121 Room 408 (B) of No. 998 Wenyi West Road, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: HANGZHOU NANOCHAP ELECTRONICS Co.,Ltd. |
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