CN113794463A - Novel single-chip numerical control attenuator chip - Google Patents
Novel single-chip numerical control attenuator chip Download PDFInfo
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- CN113794463A CN113794463A CN202111045162.3A CN202111045162A CN113794463A CN 113794463 A CN113794463 A CN 113794463A CN 202111045162 A CN202111045162 A CN 202111045162A CN 113794463 A CN113794463 A CN 113794463A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/24—Frequency-independent attenuators
Abstract
A novel single-chip numerical control attenuator chip comprises an attenuation module, a power supply voltage and a control voltage; the attenuation module comprises a plurality of attenuation units which are sequentially connected in series, and the control voltage and the attenuation units are connected in parallel with the same number of control voltages; the supply voltage is connected in series to the attenuation unit; the radio frequency signal is input into the attenuation module and is output after being attenuated; the invention solves the defects of the prior art, optimizes the structure of the traditional bridge T-shaped attenuation unit structure, realizes the positive-voltage control attenuator, removes a logic circuit, realizes the single-power control attenuator, has the characteristics of realizing the single-power and positive-voltage control without a TTL circuit and the like compared with the traditional attenuator, improves the practicability of the numerical control attenuator, simplifies the control structure and has high integration level.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of numerical control attenuators, and particularly relates to a novel single-chip numerical control attenuator chip.
[ background of the invention ]
The digital control attenuator is an important microwave control circuit, is widely applied to electronic equipment such as broadband communication, electronic countermeasure systems, microwave radio communication, radars, space communication and the like, mainly plays a role in gain setting and control in the circuit, and has great influence on a radio frequency microwave system. Therefore, the research on the single-chip numerical control attenuator chip driven by the single electric positive voltage has great application value and practical significance.
The switch control device of the attenuator mostly adopts a GaAs pseudomorphic high electron mobility transistor (pHEMT) device, and has the characteristics of smaller conduction insertion loss, higher speed, higher cut-off frequency and the like, so the switch control device becomes a mainstream device for developing a numerical control attenuator. The attenuation structures commonly used by the attenuator mainly comprise a T type, a pi type and a bridge T type, each structure has advantages and disadvantages, and the successful development of selecting a reasonable attenuation structure and a circuit is inseparable. However, most attenuators are controlled by negative charges because they use depletion-mode GaAs switching devices. However, in some overall systems, a negative power supply is not provided, so that the attenuator with negative electric control has certain limitation. While each attenuation bit requires two complementary control voltages, the additional TTL drivers are usually required if single electrical control is desired, increasing the complexity of the application system.
With the strong demand for system miniaturization and the improvement of the processing capability of GaAs single chip, the functions of chip products are more complicated. The requirement of the original single-function circuit is gradually reduced, and the application requirement of a chip with higher integration level is more urgent. Therefore, the traditional numerical control attenuator has the problems of poor practicability, complex control, low integration level and the like, and all the problems become technical problems which need to be solved urgently.
[ summary of the invention ]
The invention aims to provide a novel single-chip numerical control attenuator chip, which comprises an attenuation module, a power supply voltage and a control voltage;
the attenuation module comprises a plurality of attenuation units which are sequentially connected in series, and the control voltage and the attenuation units are connected in parallel to form the same number of control voltages;
the supply voltage is connected in series with the attenuation unit;
the radio frequency signal is input into the attenuation module and is output after being attenuated.
Preferably, the attenuation module comprises a first attenuation unit, a second attenuation unit, a third attenuation unit, a fourth attenuation unit, a fifth attenuation unit and a sixth attenuation unit;
the output end of the power supply voltage series connection third attenuation unit is connected with the input end of the fourth attenuation unit.
Preferably, the radio frequency signal is input to an input end of a first attenuation unit, an output end of the first attenuation unit is connected to an input end of a second attenuation unit, an output end of the second attenuation unit is connected to an input end of a third attenuation unit, an output end of the third attenuation unit is connected to an input end of a fourth attenuation unit, an output end of the fourth attenuation unit is connected to an input end of a fifth attenuation unit, an output end of the fifth attenuation unit is connected to an input end of a sixth attenuation unit, and an output end of the sixth attenuation unit outputs the radio frequency signal.
Preferably, the attenuation unit comprises a resistor R3, a resistor R4, a resistor R5, a capacitor C3, a transistor Q1 and a transistor Q2;
two ends of the resistor R3 are respectively connected with the source and the drain of the transistor Q1, one end of the resistor R4 is connected with the drain of the transistor Q1, the other end of the resistor R4 is respectively connected with one end of the resistor R5 and one end of the capacitor C3, the other end of the resistor R5 is connected with the source of the transistor Q1, and the other end of the capacitor C3 is respectively connected with one end of the resistor R6 and one end of the transistor Q2.
Preferably, the attenuation unit further includes a resistor R1, a resistor R2, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C4, and a capacitor C5;
one end of the resistor R1 is connected with the gate of the transistor Q1, the other end of the resistor R1 is connected with the resistor R6 and the resistor R7, and one end of the resistor R2 is connected with the source of the transistor Q1;
the resistor R6 and the resistor R7 are respectively connected with the drain and the source of the transistor Q2, one end of the resistor R8 is connected with the gate of the transistor Q2, the other end of the resistor R8 is connected with the capacitor C5, the other end of the capacitor C5 is connected with the capacitor C4 and the resistor R9, and the source of the transistor Q2 is connected with the capacitor C4 and the resistor R9 and then grounded.
Preferably, the resistor R3, the resistor R4, the resistor R5 and the capacitor C3 form a basic bridge T attenuation structure.
Preferably, the transistor Q1 and the transistor Q2 both use SGSW transistors.
Preferably, the capacitor C1 and the capacitor C2 are provided as off-chip dc blocking capacitors.
The novel single-chip numerical control attenuation chip provided by the invention has the following beneficial effects: the chip has the advantages that the defects of the prior art are overcome, the single-chip numerical control attenuator chip which is not required to be driven by level conversion is provided, the structure is optimized in the traditional bridge T-shaped attenuation unit structure, the positive-pressure control attenuator is realized, a logic circuit is removed, the single-electric control attenuator is realized, and compared with the traditional attenuator, the single-power-supply and positive-pressure control are realized, the characteristics of a TTL circuit and the like are not required, the practicability of the numerical control attenuator is improved, the control structure is simplified, and the integration level is high.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a block diagram of the overall structure of the novel monolithic numerical control attenuator chip of the present invention;
FIG. 2 is a schematic circuit diagram of an attenuating unit according to the present invention;
1. a first attenuation unit; 2. a second attenuation unit; 3. a third attenuation unit; 4. a fourth attenuation unit; 5. a fifth attenuation unit; 6. and a sixth attenuation unit.
[ detailed description ] embodiments
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, see fig. 1;
a novel single-chip numerical control attenuator chip comprises an attenuation module, a power supply voltage and a control voltage; the attenuation module comprises a plurality of attenuation units which are sequentially connected in series, and the control voltage and the attenuation units are connected in parallel with the same number of control voltages; the supply voltage is connected in series to the attenuation unit; and the radio frequency signal is input into the attenuation module and is output after being attenuated.
The attenuation module comprises a first attenuation unit, a second attenuation unit, a third attenuation unit, a fourth attenuation unit, a fifth attenuation unit and a sixth attenuation unit; numerical control attenuation can be realized by 6 attenuation units connected in series, and control voltage is respectively input into corresponding transistors of the six attenuation units.
The output end of the power supply voltage which is input to the third attenuation unit in series is connected with the input end of the fourth attenuation unit.
The radio frequency signal is input into the input end of the first attenuation unit, the output end of the first attenuation unit is connected with the input end of the second attenuation unit, the output end of the second attenuation unit is connected with the input end of the third attenuation unit, the output end of the third attenuation unit is connected with the input end of the fourth attenuation unit, the output end of the fourth attenuation unit is connected with the input end of the fifth attenuation unit, the output end of the fifth attenuation unit is connected with the input end of the sixth attenuation unit, and the output end of the sixth attenuation unit outputs the radio frequency signal.
Referring to fig. 2, the attenuation unit includes a resistor R3, a resistor R4, a resistor R5, a capacitor C3, a transistor Q1, and a transistor Q2;
the transistor Q1 and the transistor Q2 both use SGSW transistors as switching control devices of the rf path and the attenuation path, respectively.
Two ends of the resistor R3 are respectively connected with the source and the drain of the transistor Q1, one end of the resistor R4 is connected with the drain of the transistor Q1, the other end of the resistor R4 is respectively connected with one end of the resistor R5 and one end of the capacitor C3, the other end of the resistor R5 is connected with the source of the transistor Q1, and the other end of the capacitor C3 is respectively connected with one end of the resistor R6 and one end of the transistor Q2.
When complementary control voltages are applied to the first transistor Q1 and the second transistor Q2, the selection of shoot-through/decay is achieved, the presence of a reference voltage at the source terminal of the switch control device, so that the complementary control voltages are controlled by a positive voltage 0/5V or 0/3.3V.
The attenuation unit further comprises a resistor R1, a resistor R2, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C4 and a capacitor C5;
one end of the resistor R1 is connected with the gate of the transistor Q1, the other end of the resistor R1 is connected with the resistor R6 and the resistor R7, and one end of the resistor R2 is connected with the source of the transistor Q1;
the resistor R2 and the resistor R8 are used as radio frequency isolation large resistors, and the power supply voltage is applied to the source end of the switch control device through the radio frequency isolation large resistors to provide source reference voltage for the first transistor Q1 and the second transistor Q2.
The resistor R6 and the resistor R7 are respectively connected with the drain and the source of the transistor Q2, one end of the resistor R8 is connected with the grid of the transistor Q2, the other end of the resistor R8 is connected with the capacitor C5, the other end of the capacitor C5 is connected with the capacitor C4 and the resistor R9, and the source of the transistor Q2 is connected with the capacitor C4 and the resistor R9 and then grounded.
The capacitor C4, the resistor R9 and the capacitor C5 can adjust the attenuation accuracy of a high frequency band, wherein in order to prevent direct current from leaking at the grounding end of the bridge T structure, a large capacitor needs to be integrated in a chip, and an attenuation unit plays a role in attenuation control in the whole chip circuit.
The resistor R3, the resistor R4, the resistor R5 and the capacitor C3 form a basic bridge T attenuation structure, and the resistance value is adjusted according to the requirements of each attenuation unit, so that the attenuation of 0.5dB, 1dB, 2dB, 4dB and 8dB to 16dB is realized.
The capacitor C1 and the capacitor C2 are arranged as off-chip blocking capacitors, and because the design frequency band is 2.7 GHz-8 GHz, full-band blocking needs 20pF capacitors, and the on-chip integration occupies a large area and wastes cost, so that the off-chip structure is the part of the off-chip structure.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In conclusion, the novel single-chip numerical control attenuation chip provided by the invention has the following beneficial effects: the chip is structurally optimized in the traditional bridge T-shaped attenuation unit structure, the positive-voltage control attenuator is realized, a logic circuit is removed, and the single-electric control attenuator is realized. Compared with the traditional attenuator, the digital control attenuator has the characteristics of realizing single power supply and positive pressure control, not needing a TTL circuit and the like, improving the practicability of the digital control attenuator, simplifying the control structure and having high integration level.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit may be a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed, and in another point, the shown or discussed coupling or direct coupling or communication connection between each other may be through some interfaces, indirect coupling or communication connection between units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A novel single-chip numerical control attenuator chip is characterized in that: the device comprises an attenuation module, a power supply voltage and a control voltage;
the attenuation module comprises a plurality of attenuation units which are sequentially connected in series, and the control voltage and the attenuation units are connected in parallel with the same number of control voltages;
the supply voltage is connected in series to the attenuation unit;
and the radio frequency signal is input into the attenuation module and is output after being attenuated.
2. The novel monolithic digitally controlled attenuator chip of claim 1, wherein: the attenuation module comprises a first attenuation unit, a second attenuation unit, a third attenuation unit, a fourth attenuation unit, a fifth attenuation unit and a sixth attenuation unit;
and the output end of the power supply voltage series connection third attenuation unit is connected with the input end of the fourth attenuation unit.
3. The novel monolithic digitally controlled attenuator chip of claim 1, wherein: the radio frequency signal is input into the input end of the first attenuation unit, the output end of the first attenuation unit is connected with the input end of the second attenuation unit, the output end of the second attenuation unit is connected with the input end of the third attenuation unit, the output end of the third attenuation unit is connected with the input end of the fourth attenuation unit, the output end of the fourth attenuation unit is connected with the input end of the fifth attenuation unit, the output end of the fifth attenuation unit is connected with the input end of the sixth attenuation unit, and the output end of the sixth attenuation unit outputs the radio frequency signal.
4. The novel monolithic digitally controlled attenuator chip of claim 1, wherein: the attenuation unit comprises a resistor R3, a resistor R4, a resistor R5, a capacitor C3, a transistor Q1 and a transistor Q2;
two ends of the resistor R3 are respectively connected with the source and the drain of the transistor Q1, one end of the resistor R4 is connected with the drain of the transistor Q1, the other end of the resistor R4 is respectively connected with one end of the resistor R5 and one end of the capacitor C3, the other end of the resistor R5 is connected with the source of the transistor Q1, and the other end of the capacitor C3 is respectively connected with one end of the resistor R6 and one end of the transistor Q2.
5. The novel monolithic digitally controlled attenuator chip of claim 4, wherein: the attenuation unit further comprises a resistor R1, a resistor R2, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C4 and a capacitor C5;
one end of the resistor R1 is connected with the gate of the transistor Q1, the other end of the resistor R1 is connected with the resistor R6 and the resistor R7, and one end of the resistor R2 is connected with the source of the transistor Q1;
the resistor R6 and the resistor R7 are respectively connected with the drain and the source of the transistor Q2, one end of the resistor R8 is connected with the grid of the transistor Q2, the other end of the resistor R8 is connected with the capacitor C5, the other end of the capacitor C5 is connected with the capacitor C4 and the resistor R9, and the source of the transistor Q2 is connected with the capacitor C4 and the resistor R9 and then grounded.
6. The novel monolithic digitally controlled attenuator chip of claim 4, wherein: the resistor R3, the resistor R4, the resistor R5 and the capacitor C3 form a basic bridge T attenuation structure.
7. The novel monolithic digitally controlled attenuator chip of claim 4, wherein: the transistor Q1 and the transistor Q2 both adopt SGSW transistors.
8. The novel monolithic digitally controlled attenuator chip of claim 5, wherein: the capacitor C1 and the capacitor C2 are provided as off-chip dc blocking capacitors.
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| CN202111045162.3A CN113794463A (en) | 2021-09-07 | 2021-09-07 | Novel single-chip numerical control attenuator chip |
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| CN202111045162.3A CN113794463A (en) | 2021-09-07 | 2021-09-07 | Novel single-chip numerical control attenuator chip |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116248076A (en) * | 2023-02-24 | 2023-06-09 | 电子科技大学 | High-linearity digital step attenuator with low power consumption logic control |
| CN116865715A (en) * | 2023-08-30 | 2023-10-10 | 上海安其威微电子科技有限公司 | Radio frequency attenuation circuit and radio frequency chip |
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| CN203206189U (en) * | 2013-04-17 | 2013-09-18 | 绵阳雷迪创微电子科技有限公司 | Digitally controlled attenuator controlled by positively charged single signaling mechanism |
| CN209823721U (en) * | 2019-02-22 | 2019-12-20 | 南京国博电子有限公司 | Circuit for controlling signal overshoot of numerical control attenuator |
| CN110855266A (en) * | 2019-11-27 | 2020-02-28 | 西安博瑞集信电子科技有限公司 | Single-voltage positive-voltage driven single-chip numerical control attenuator chip |
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2021
- 2021-09-07 CN CN202111045162.3A patent/CN113794463A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203206189U (en) * | 2013-04-17 | 2013-09-18 | 绵阳雷迪创微电子科技有限公司 | Digitally controlled attenuator controlled by positively charged single signaling mechanism |
| CN209823721U (en) * | 2019-02-22 | 2019-12-20 | 南京国博电子有限公司 | Circuit for controlling signal overshoot of numerical control attenuator |
| CN110855266A (en) * | 2019-11-27 | 2020-02-28 | 西安博瑞集信电子科技有限公司 | Single-voltage positive-voltage driven single-chip numerical control attenuator chip |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116248076A (en) * | 2023-02-24 | 2023-06-09 | 电子科技大学 | High-linearity digital step attenuator with low power consumption logic control |
| CN116248076B (en) * | 2023-02-24 | 2024-04-02 | 电子科技大学 | High-linearity digital step attenuator with low power consumption logic control |
| CN116865715A (en) * | 2023-08-30 | 2023-10-10 | 上海安其威微电子科技有限公司 | Radio frequency attenuation circuit and radio frequency chip |
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