CN220823035U - IQ signal output amplifying circuit - Google Patents
IQ signal output amplifying circuit Download PDFInfo
- Publication number
- CN220823035U CN220823035U CN202322421365.9U CN202322421365U CN220823035U CN 220823035 U CN220823035 U CN 220823035U CN 202322421365 U CN202322421365 U CN 202322421365U CN 220823035 U CN220823035 U CN 220823035U
- Authority
- CN
- China
- Prior art keywords
- amplifier
- capacitor
- output
- attenuator
- amplifying module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 41
- 230000003321 amplification Effects 0.000 claims description 17
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 17
- 239000011324 bead Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to an output amplifying circuit of an IQ signal, which comprises a first-stage amplifying module and a second-stage amplifying module, wherein the first-stage amplifying module is connected with the second-stage amplifying module in series, the circuit structures of the first-stage amplifying module and the second-stage amplifying module are the same, the first-stage amplifying module comprises a first filter U1, a first amplifier U2 and a first attenuator U3, an output pin of the first filter U1 is connected with an input end of the first amplifier U2 through a first frequency selecting circuit, an output end of the first amplifier U2 is connected with an input end of the first attenuator U3 through a capacitor C1, an output end of the first attenuator U3 is connected with an input end of the second amplifying module, a first power module is connected with an output end of the first amplifier U2, and a capacitor C2 and a resistor R1 which are connected in series are connected between the input end and the output end of the first amplifier U2. The gain effect is guaranteed through two-stage increase, attenuators are connected in series in the first-stage amplifying module and the second-stage amplifying module, the consistency of signal amplitude can be adjusted, and signal distortion acquired by a subsequent intermediate frequency board is avoided.
Description
Technical Field
The utility model relates to the technical field of communication signal processing, in particular to an output amplifying circuit of an IQ signal.
Background
IQ signals are also known as Quadrature signals, I is In-Phase and Q is Quadrature (Phase shifted 90 degrees). I.e. representing two signals that are 90 degrees out of phase. In the current communication technical field, IQ signal modulation belongs to standard setting, and is often used in signal modulation and demodulation links of a communication system, so that modulation application of IQ signals simplifies a communication circuit structure and improves utilization efficiency of spectrum resources. Some basic circuits, such as a mixer, a low-pass filter and an amplifier, are needed for the demodulation of the IQ signal, wherein the mixer is used for multiplying the modulated signal with a signal generated by a local oscillator to obtain I and Q components, and when the IQ signal is demodulated by using the mixer, the demodulation signal acquired by a subsequent intermediate frequency board is easily distorted due to poor consistency of the input IQ signal, and the distortion is too large, so that the waveform of the signal is distorted, and is difficult to recognize, and the information contained in the original signal cannot be recovered.
Disclosure of utility model
In view of the above, it is necessary to provide an output amplifier circuit for IQ signals.
The utility model provides an output amplifier circuit of IQ signal, includes one-level amplification module and second grade amplification module, one-level amplification module and second grade amplification module establish ties, one-level amplification module is the same with the circuit structure of second grade amplification module, one-level amplification module includes first wave filter U1, first amplifier U2 and first attenuator U3, first wave filter U1's output foot is connected with first amplifier U2's input through first frequency selective circuit, first amplifier U2's output is connected with first attenuator U3's input through electric capacity C1, first attenuator U3's output is connected with second amplification module's input, first power module is connected with first amplifier U2's output, be connected with electric capacity C2 and resistance R1 of establishing ties between first amplifier U2's input and the output.
Preferably, the first frequency selecting circuit includes a capacitor C3, a capacitor C4 and an inductor L1, one end of the inductor L1 is connected with the output end of the first filter U1, the other end of the inductor L1 is connected with the input end of the first amplifier U2 through the capacitor C3, one end of the capacitor C4 is connected with the output end of the first filter U1, and the other end is grounded.
Preferably, the first power module includes a power supply V1, a magnetic bead M1, a resistor R2, a capacitor C5, a capacitor C6 and an inductor L2, where the power supply V1 is sequentially connected with the magnetic bead M1 in series, the resistor R2 and the inductor L2 are connected with the output end of the first amplifier U2, one ends of the capacitor C5 and the capacitor C6 are connected between the resistor R2 and the inductor L2, and the other ends are grounded.
Preferably, the model of the first amplifier U2 is PHA-13LN+.
Preferably, the model of the first attenuator U3 is PAT1220-C-2DB-T5.
The utility model has the advantages that: the IQ signal is subjected to two-stage increase, the gain effect is ensured, an attenuator is connected in series in the first-stage amplifying module and the second-stage amplifying module, the power of the signal is controlled, the consistency of the signal amplitude is adjusted, the signal amplitude is reduced to a required level, the IQ signal is matched with other signals conveniently, and the signal distortion acquired by a subsequent intermediate frequency board is avoided.
Drawings
Fig. 1 is a schematic diagram of an output amplifying circuit of an IQ signal according to an embodiment.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, an output amplifying circuit of an IQ signal includes a first-stage amplifying module 100 and a second-stage amplifying module 200, the first-stage amplifying module 100 is connected in series with the second-stage amplifying module 200, the first-stage amplifying module 100 has the same circuit structure as the second-stage amplifying module 200, the first-stage amplifying module 100 includes a first filter U1, a first amplifier U2 and a first attenuator U3, an output pin of the first filter U1 is connected with an input end of the first amplifier U2 through a first frequency-selecting circuit 101, an output end of the first amplifier U2 is connected with an input end of the first attenuator U3 through a capacitor C1, an output end of the first attenuator U3 is connected with an input end of the second amplifying module 200, a first power module 102 is connected with an output end of the first amplifier U2, and a capacitor C2 and a resistor R1 connected in series between the input end and the output end of the first amplifier U2. Specifically, in this embodiment, one signal in the IQ signal first enters the first stage amplifying module 100, after being filtered by the first filter U1, enters the first frequency selecting circuit 101, and can selectively filter noise with a specific frequency, and then the signal is input to the first amplifier U2 for signal amplifying processing. The applicant has connected to the output of the first amplifier U2 a first attenuator U3, which acts to adjust the gap between signal transmission and reception, and also to compensate for the power loss, so as to ensure the accuracy of the test results. The first power module 102 is connected with the output end of the first amplifier U2, supplies power to the first filter U1, the first amplifier U2 and the first attenuator U3, and is connected with a resistor-capacitor circuit formed by connecting a capacitor C2 and a resistor R1 in series at the input end and the output end of the first amplifier U2 for integral operation.
Further, in the present embodiment, the second-stage amplifying module 200 is connected in series with the first-stage amplifying module 100, and has the same circuit structure, and performs two-stage amplifying processing on the input single-path IQ signal. The second-stage amplifying module 200 includes a second filter U4, a second amplifier U5 and a second attenuator U6, where an input pin of the second filter U4 is connected to an output end of the first attenuator U3, and an output pin of the second filter U4 is connected to an input end of the second amplifier U5 through a second frequency selecting circuit 201, where a circuit structure of the second frequency selecting circuit 201 is the same as that of the first frequency selecting circuit 101, an output end of the second amplifier U2 is connected to an input end of the second attenuator U6 through a capacitor C11, and an output end of the second attenuator U3 is connected to an external intermediate frequency board collecting end (not shown in the figure). The second power module 202 is connected to the output terminal of the second amplifier U5, and a capacitor C21 and a resistor R11 connected in series are connected between the input terminal and the output terminal of the second amplifier U5.
It can be understood that when two paths of IQ signals need to be amplified simultaneously, two paths of signal output amplifying circuits need to be correspondingly used for amplifying the IQ signals synchronously, and the two paths of signal output amplifying circuits can adopt a circuit structure of the first-stage amplifying module 100 and the second-stage amplifying module 200 connected in series, which is understood by those skilled in the art, and is not described in detail herein.
The first frequency selection circuit 101 is connected with the input end of the first amplifier U2, the output end of the first amplifier U2 is connected with the input end of the first attenuator U3 through a capacitor C1, the output end of the first attenuator U3 is connected with the input end of the second amplification module 200, the first power supply module 102 is connected with the output end of the first amplifier U2, a capacitor C2 and a resistor R1 which are connected in series are connected between the input end and the output end of the first amplifier U2, and the connection part of the resistor R1 and the capacitor C2 is grounded.
As shown in fig. 1, the first frequency selection circuit 101 includes a capacitor C3, a capacitor C4 and an inductor L1, one end of the inductor L1 is connected to the output end of the first filter U1, the other end of the inductor L1 is connected to the input end of the first amplifier U2 through the capacitor C3, one end of the capacitor C4 is connected to the output end of the first filter U1, the other end is grounded, and the frequency selection circuit 300 can be used to selectively filter noise with a specific frequency in the signal.
As shown in fig. 1, the first power module 102 includes a power supply V1, a magnetic bead M1, a resistor R2, capacitors C5 and C6, and an inductor L2, where the power supply V1 is sequentially connected in series with the magnetic bead M1, the resistor R2 and the inductor L2 are connected to the output end of the first amplifier U2, one ends of the capacitor C5 and the capacitor C6 are connected between the resistor R2 and the inductor L2, and the other ends are grounded. Specifically, the power supply V1 adopts 5V voltage, is connected with the magnetic beads M1, eliminates high-frequency noise and peak interference on a power line, has the capacity of absorbing electrostatic pulses, takes the capacitor C5 and the capacitor C6 as grounding capacitors, plays an energy storage role, simultaneously filters high-frequency noise generated by circuit devices, cuts off a passage of the high-frequency noise transmitted through a power supply loop, and prevents noise carried by the power supply from interfering the circuit.
As an alternative embodiment, the first amplifier U2 and the model number are PHA-13ln+.
As an alternative embodiment, the model number of the first attenuator U3 and the second attenuator U3 is PAT1220-C-2DB-T5.
As an alternative embodiment, the first filter U1 is a high-pass filter tailored by the applicant, with a nominal frequency adaptation of 6.25MHZ.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (5)
1. An output amplifying circuit of an IQ signal, characterized in that: the circuit structure of the first-stage amplification module is the same as that of the second-stage amplification module, the first-stage amplification module comprises a first filter U1, a first amplifier U2 and a first attenuator U3, an output pin of the first filter U1 is connected with an input end of the first amplifier U2 through a first frequency selection circuit, an output end of the first amplifier U2 is connected with an input end of the first attenuator U3 through a capacitor C1, an output end of the first attenuator U3 is connected with an input end of the second amplification module, a first power supply module is connected with an output end of the first amplifier U2, and a capacitor C2 and a resistor R1 which are connected in series are connected between the input end and the output end of the first amplifier U2.
2. The IQ signal output amplification circuit according to claim 1 wherein: the first frequency selection circuit comprises a capacitor C3, a capacitor C4 and an inductor L1, one end of the inductor L1 is connected with the output end of the first filter U1, the other end of the inductor L1 is connected with the input end of the first amplifier U2 through the capacitor C3, one end of the capacitor C4 is connected with the output end of the first filter U1, and the other end of the capacitor C4 is grounded.
3. The IQ signal output amplification circuit according to claim 1 wherein: the first power supply module comprises a power supply V1, magnetic beads M1, a resistor R2, capacitors C5 and C6 and an inductor L2, wherein the power supply V1 is sequentially connected with the magnetic beads M1 in series, the resistor R2 and the inductor L2 are connected with the output end of the first amplifier U2, one ends of the capacitor C5 and the capacitor C6 are connected between the resistor R2 and the inductor L2, and the other ends of the capacitor C5 and the capacitor C6 are grounded.
4. The IQ signal output amplification circuit according to claim 1 wherein: the model of the first amplifier U2 is PHA-13LN+.
5. The IQ signal output amplification circuit according to claim 1 wherein: the model of the first attenuator U3 is PAT1220-C-2DB-T5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322421365.9U CN220823035U (en) | 2023-09-06 | 2023-09-06 | IQ signal output amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322421365.9U CN220823035U (en) | 2023-09-06 | 2023-09-06 | IQ signal output amplifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220823035U true CN220823035U (en) | 2024-04-19 |
Family
ID=90699107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322421365.9U Active CN220823035U (en) | 2023-09-06 | 2023-09-06 | IQ signal output amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220823035U (en) |
-
2023
- 2023-09-06 CN CN202322421365.9U patent/CN220823035U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3086512B2 (en) | Transmitter and its power amplifier circuit | |
| US11546192B2 (en) | Receiver circuits with blocker attenuating rf filter | |
| WO2006073567A2 (en) | Receiver with chopper stabilization and method thereof | |
| JP3866290B2 (en) | Method and circuit device for reducing signal offset voltage | |
| JPH07131278A (en) | Device for combining signals with each other | |
| JP3216597B2 (en) | Direct conversion receiver | |
| CN220823035U (en) | IQ signal output amplifying circuit | |
| US6188880B1 (en) | Apparatus and method for reducing low-frequency distortion in frequency converted signals | |
| US20060057989A1 (en) | Zero if down converter with even order harmonic suppression | |
| CN100559725C (en) | The improvement project that relates to heterogeneous receiver | |
| CN212275960U (en) | Signal disturbance extraction circuit and radio frequency receiver | |
| CN207802106U (en) | A kind of high spurious reduction converter plant of S frequency ranges | |
| JP3067308B2 (en) | Cellular receiver | |
| CN210157212U (en) | Amplitude modulation signal processing experimental circuit | |
| CN100527598C (en) | Wideband I/Q signal generation device | |
| CN209767501U (en) | Frequency spectrum conversion device based on multiple multipliers | |
| CN219740338U (en) | Gaussian function signal modulation circuit and device | |
| CN216670719U (en) | Remote communication receiving circuit | |
| US20040086037A1 (en) | Noise reduction apparatus | |
| CN1852545A (en) | Simulating apparatus and method for realizing honeycomb residence user content detection | |
| CN213426165U (en) | Power bus communication module of logging-while-drilling instrument | |
| CN209345140U (en) | Frequency modulation input circuit and Vehicular radio system | |
| CN210807238U (en) | FM demodulation system capable of automatically tracking carrier | |
| CN103139122A (en) | Transmission and reception apparatus and transmission and reception system | |
| CN216565122U (en) | Multi-output signal reference source circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |