CN116015212A - Noise compensation circuit in oscillator circuit - Google Patents
Noise compensation circuit in oscillator circuit Download PDFInfo
- Publication number
- CN116015212A CN116015212A CN202211283842.3A CN202211283842A CN116015212A CN 116015212 A CN116015212 A CN 116015212A CN 202211283842 A CN202211283842 A CN 202211283842A CN 116015212 A CN116015212 A CN 116015212A
- Authority
- CN
- China
- Prior art keywords
- circuit
- capacitor
- triode
- transistor
- oscillating circuit
- 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.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Abstract
The invention discloses a circuit for compensating noise in an oscillator circuit, which comprises an oscillating circuit, an LDO circuit and a crystal resonator, wherein the LDO circuit and the crystal resonator are connected with the oscillating circuit; the oscillating circuit outputs a frequency signal. The invention adopts the high Q value crystal resonator as the core device to form the oscillating circuit, and performs accurate circuit parameter design, thereby improving the frequency stability and greatly improving the phase noise of the oscillator.
Description
Technical Field
The invention relates to the technical field of oscillator circuits, in particular to a circuit for compensating noise in an oscillator circuit.
Background
The traditional crystal oscillator mainly adopts discrete components to form a capacitance three-point type oscillating circuit, the oscillating circuit formed by the scheme has lower stability and poorer anti-interference performance, so that the problem of phase noise deterioration is caused, and therefore, a noise compensation circuit in the oscillator circuit is provided.
Disclosure of Invention
The invention aims to provide a circuit for compensating noise in an oscillator circuit, which solves the existing problems.
In order to achieve the above purpose, the present invention provides the following technical solutions: a circuit for noise compensation in an oscillator circuit comprises an oscillation circuit, an LDO circuit and a crystal resonator, wherein the LDO circuit and the crystal resonator are connected with the oscillation circuit;
the oscillating circuit outputs a frequency signal.
The oscillation circuit includes an inverter U1, and a crystal resonator Y1 connected to the inverter U1, and constitutes a closed-loop oscillation circuit.
Preferably, the inverter U1 is connected to a capacitor C1 and a capacitor C2, and a transistor Q3 connected between the capacitor C1 and the capacitor C2, and the transistor Q3 is connected to a switch 3.
Preferably, a diode D1 is connected between the capacitor C1 and the triode Q3, a diode D2 is connected between the capacitor C2 and the triode Q3, and the other ends of the diode D2 and the triode Q3 are grounded.
Preferably, the capacitor C2 is connected with a transistor Q5, the capacitor C1 is connected with a transistor Q4, and the transistor 4 is connected with a switch ON4.
Preferably, two ends of the capacitor C1 are connected to two ends of the triode Q1, and the triode Q1 is connected with a switch ON1.
Preferably, two ends of the capacitor C2 are connected to two ends of the triode Q2, and the triode Q2 is connected with a switch ON2.
Preferably, the capacitor C2 is connected to a transistor Q5, and the transistor Q5 is connected to a switch ON5.
Compared with the prior art, the invention has the following beneficial effects:
the invention can improve the phase noise index in the oscillator and enhance the stability and reliability of the product.
The invention adopts the high Q value crystal resonator as the core device to form the oscillating circuit, and performs accurate circuit parameter design, thereby improving the frequency stability and greatly improving the phase noise of the oscillator.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic diagram of an oscillator circuit according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1, a circuit for noise compensation in an oscillator circuit includes an oscillating circuit, and an LDO circuit and a crystal resonator connected to the oscillating circuit;
the oscillating circuit outputs a frequency signal, the integral scheme realizes that the LDO regulated power supply provides power supply voltage, and the high-Q resonator key device and other components are combined to form a stable and reliable oscillating circuit, so that the frequency signal with high stability and low phase noise can be obtained.
As shown in fig. 2, the oscillation circuit includes an inverter U1, and a crystal resonator Y1 connected to the inverter U1, and constitutes a closed-loop oscillation circuit;
the inverter U1 is connected with a capacitor C1 and a capacitor C2, and a triode Q3 connected between the capacitor C1 and the capacitor C2, the triode Q3 is connected with a switch 3, a diode D1 is connected between the capacitor C1 and the triode Q3, a diode D2 is connected between the capacitor C2 and the triode Q3, the other ends of the diode D2 and the triode Q3 are grounded, the capacitor C2 is connected with a triode Q5, the capacitor C1 is connected with a triode Q4, the triode 4 is connected with a switch ON4, two ends of the capacitor C1 are connected with two ends of the triode Q1, the triode Q1 is connected with a switch ON1, two ends of the capacitor C2 are connected with two ends of the triode Q2, the triode Q2 is connected with a switch ON2, the capacitor C2 is connected with a triode Q5, the crystal resonator Y1 and the inverter U1 form a closed-loop oscillation circuit, and the resonance signal can be amplified and amplified; the frequency signal is debugged to an optimal state by matching auxiliary devices such as discrete elements C1, C2, Q1 and Q2, and an output signal with stable and reliable work and low phase noise is obtained.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A circuit for noise compensation in an oscillator circuit is characterized by comprising an oscillation circuit, an LDO circuit and a crystal resonator, wherein the LDO circuit and the crystal resonator are connected with the oscillation circuit;
the oscillating circuit outputs a frequency signal.
2. The oscillating circuit according to claim 1, comprising an inverter U1, and a crystal resonator Y1 connected to the inverter U1, and constituting a closed-loop oscillating circuit.
3. The oscillating circuit of claim 2, wherein the inverter U1 is connected to a capacitor C1 and a capacitor C2, and a transistor Q3 is connected between the capacitor C1 and the capacitor C2, and the transistor Q3 is connected to a switch 3.
4. The oscillating circuit of claim 3, wherein a diode D1 is connected between the capacitor C1 and the triode Q3, a diode D2 is connected between the capacitor C2 and the triode Q3, and the other ends of the diode D2 and the triode Q3 are grounded.
5. An oscillating circuit according to claim 3, wherein the capacitor C2 is connected to a transistor Q5, the capacitor C1 is connected to a transistor Q4, and the transistor 4 is connected to a switch ON4.
6. The oscillating circuit of claim 3, wherein two ends of the capacitor C1 are connected to two ends of the triode Q1, and the triode Q1 is connected to a switch ON1.
7. The oscillating circuit of claim 3, wherein two ends of the capacitor C2 are connected to two ends of a transistor Q2, and the transistor Q2 is connected to a switch ON2.
8. An oscillating circuit according to claim 3, wherein the capacitor C2 is connected to a transistor Q5, and the transistor Q5 is connected to a switch ON5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211283842.3A CN116015212A (en) | 2022-10-19 | 2022-10-19 | Noise compensation circuit in oscillator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211283842.3A CN116015212A (en) | 2022-10-19 | 2022-10-19 | Noise compensation circuit in oscillator circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116015212A true CN116015212A (en) | 2023-04-25 |
Family
ID=86023622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211283842.3A Pending CN116015212A (en) | 2022-10-19 | 2022-10-19 | Noise compensation circuit in oscillator circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116015212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116991199A (en) * | 2023-09-25 | 2023-11-03 | 深圳扬兴科技有限公司 | Clock signal intelligent noise reduction method for clock chip |
-
2022
- 2022-10-19 CN CN202211283842.3A patent/CN116015212A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116991199A (en) * | 2023-09-25 | 2023-11-03 | 深圳扬兴科技有限公司 | Clock signal intelligent noise reduction method for clock chip |
| CN116991199B (en) * | 2023-09-25 | 2024-01-02 | 深圳扬兴科技有限公司 | Clock signal intelligent noise reduction method for clock chip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103095217B (en) | Low Phase Noise Voltage-controlled Oscillator | |
| CN103346782B (en) | A kind of fast start-up crystal oscillator | |
| CN116015212A (en) | Noise compensation circuit in oscillator circuit | |
| CN103475310A (en) | Low power consumption injection locked frequency tripler | |
| CN106877863A (en) | OSC circuits on a kind of high stability low-power consumption piece | |
| CN107332514A (en) | A kind of push-push voltage controlled oscillator without varactor | |
| US7902930B2 (en) | Colpitts quadrature voltage controlled oscillator | |
| CN108768301A (en) | A kind of LC voltage controlled oscillators of substrate dynamic bias | |
| CN103475309A (en) | Constant tuning gain voltage-controlled oscillator | |
| CN101127506A (en) | A novel CMOS oscillator circuit | |
| CN103731140A (en) | High-frequency voltage-controlled oscillator with low phase noise | |
| US9287824B2 (en) | Circuit arrangement for creating microwave oscillations | |
| CN103208991A (en) | Voltage controlled oscillator based on inductance bias | |
| CN111313892B (en) | Wide locking range switchable dual-core injection locking frequency divider | |
| CN107294513A (en) | Crystal-oscillator circuit | |
| CN204304928U (en) | A kind of voltage-controlled oscillator circuit | |
| CN203368442U (en) | Low-power high-precision LC voltage-controlled oscillator | |
| CN202713231U (en) | high frequency low phase noise constant temperature crystal oscillation circuit | |
| CN110719069B (en) | Novel low-noise voltage-controlled oscillator | |
| CN210518226U (en) | Wideband voltage controlled oscillator for digital interphone | |
| CN107800387B (en) | Amplitude control circuit and inductance-capacitance voltage-controlled oscillator circuit | |
| CN113676137A (en) | Voltage controlled oscillator | |
| CN209057177U (en) | A kind of wideband voltage controlled oscillator | |
| CN203352538U (en) | Voltage-controlled oscillator circuit | |
| CN110719070A (en) | Low-power consumption voltage-controlled oscillator based on dynamic threshold technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |