CN107800448B - Medium wave transmitter frequency synthesizer - Google Patents
Medium wave transmitter frequency synthesizer Download PDFInfo
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- CN107800448B CN107800448B CN201711219389.9A CN201711219389A CN107800448B CN 107800448 B CN107800448 B CN 107800448B CN 201711219389 A CN201711219389 A CN 201711219389A CN 107800448 B CN107800448 B CN 107800448B
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- resistor
- oscillator
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- capacitor
- diode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0491—Circuits with frequency synthesizers, frequency converters or modulators
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- 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
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Transmitters (AREA)
Abstract
The invention provides a medium wave transmitter frequency synthesis device, which comprises: a power supply unit, a radio frequency unit and an oscillator, wherein the power supply unit supplies power to the radio frequency unit and the oscillator, and the oscillator comprises: a digital frequency synthesis exciter, an oscillator synchronization device, and an output circuit, wherein the digital frequency synthesis exciter comprises: the temperature compensation crystal oscillator, the amplifying circuit, the first eight frequency divider, the four frequency dividers, the second eight frequency divider and the oscillation and phase discriminator are sequentially connected, and the oscillation and phase discriminator is further connected with the two frequency dividers through the amplifier. The invention realizes signal oscillation by using the digital frequency synthesis exciter and the oscillator synchronization device, and has relatively simple circuit structure.
Description
Technical Field
The invention relates to the technical field of medium wave transmitters, in particular to a frequency synthesizer of a medium wave transmitter.
Background
With the advent of the digital information age, the DAM digital amplitude modulation technique has been widely used in medium wave broadcast transmitting devices. Based on this, how to provide a high-efficiency frequency synthesizer for a medium-wave transmitter is a technical problem to be solved at present.
Disclosure of Invention
The object of the present invention is to solve at least one of the technical drawbacks.
To this end, the invention aims to propose a frequency synthesizer for a medium wave transmitter.
In order to achieve the above object, an embodiment of the present invention provides a medium wave transmitter frequency synthesizing apparatus including: a power supply unit, a radio frequency unit and an oscillator, wherein the power supply unit supplies power to the radio frequency unit and the oscillator, and the oscillator comprises: a digital frequency synthesis exciter, an oscillator synchronization device, and an output circuit, wherein the digital frequency synthesis exciter comprises: the temperature compensation crystal oscillator, the amplifying circuit, the first eight frequency divider, the four frequency dividers, the second eight frequency divider and the oscillation and phase discriminator are sequentially connected, and the oscillation and phase discriminator is further connected with the two variable frequency dividers through an amplifier;
the oscillator synchronization apparatus includes: the base electrode of the first triode is connected with the energy storage element, the collector electrode of the first triode is connected with the base electrode of the first triode,
the output circuit includes: the device comprises a driver, a first resistor, a first capacitor, a second resistor, a third resistor, a second capacitor, a fourth resistor and a fifth resistor, wherein the output end of the driver is connected with one end of the first resistor, the other end of the first resistor is connected with the positive electrode of a first diode, the negative electrode of the diode is connected with the first capacitor, the second resistor is connected with the first capacitor in parallel and is further connected to the third resistor, the positive electrode of the first diode is connected with the negative electrode of a second diode, the positive electrode of the second diode is connected to the second capacitor and the fifth resistor, one end of the second capacitor is grounded, and the other end of the second capacitor is connected with the fourth resistor.
Further, each of the variable frequency dividers employs a twenty-one counter.
Further, the energy storage element comprises a plurality of stages of inductance and capacitance elements connected in parallel.
According to the frequency synthesis device of the medium wave transmitter, disclosed by the embodiment of the invention, the frequency synthesis of the medium wave transmitter can be realized, the signal oscillation is realized by utilizing the digital frequency synthesis exciter and the oscillator synchronization device, and the circuit structure is relatively simple.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a circuit diagram of a digital frequency synthesis exciter according to an embodiment of the invention;
fig. 2 is a circuit diagram of an oscillator synchronization apparatus according to an embodiment of the present invention;
fig. 3 is a circuit diagram of an output circuit according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1 to 3, a medium wave transmitter frequency synthesizing apparatus according to an embodiment of the present invention includes: the power supply unit, radio frequency unit and oscillator, wherein, power supply unit provides power to radio frequency unit and oscillator, and the oscillator includes: a digital frequency synthesis exciter, an oscillator synchronization device, and an output circuit, wherein the digital frequency synthesis exciter comprises: the temperature compensation crystal oscillator, the amplifying circuit, the first eight frequency divider, the four frequency dividers, the second eight frequency divider and the oscillation and phase discriminator are sequentially connected, and the oscillation and phase discriminator is further connected with the two variable frequency dividers through the amplifier.
The oscillator synchronization apparatus includes: the base electrode of the first triode is connected with the energy storage element, the collector electrode of the first triode is connected with the base electrode of the first triode,
the output circuit includes: the device comprises a driver, a first resistor, a first capacitor, a second resistor, a third resistor, a second capacitor, a fourth resistor and a fifth resistor, wherein the output end of the driver is connected with one end of the first resistor, the other end of the first resistor is connected with the positive electrode of a first diode, the negative electrode of the diode is connected with the first capacitor, the second resistor is connected with the first capacitor in parallel and is further connected to the third resistor, the positive electrode of the first diode is connected with the negative electrode of a second diode, the positive electrode of the second diode is connected with the second capacitor and the fifth resistor, one end of the second capacitor is grounded, and the other end of the second capacitor is connected with the fourth resistor.
In one embodiment of the invention, each variable frequency divider employs a twenty-one counter. The energy storage element comprises inductance and capacitance elements which are connected in parallel in multiple stages.
According to the frequency synthesis device of the medium wave transmitter, disclosed by the embodiment of the invention, the frequency synthesis of the medium wave transmitter can be realized, the signal oscillation is realized by utilizing the digital frequency synthesis exciter and the oscillator synchronization device, and the circuit structure is relatively simple.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A medium wave transmitter frequency synthesizing apparatus, comprising: a power supply unit, a radio frequency unit and an oscillator, wherein the power supply unit supplies power to the radio frequency unit and the oscillator, and the oscillator comprises: the digital frequency synthesis type exciter comprises a digital frequency synthesis type exciter, an oscillator synchronization device and an output circuit, wherein the output end of the digital frequency synthesis type exciter is connected with the input end of the oscillator synchronization device, and the output end of the oscillator synchronization device is connected with the input end of the output circuit;
wherein the digital frequency synthesis exciter comprises: the temperature compensation crystal oscillator, the amplifying circuit, the first eight frequency divider, the four frequency dividers, the second eight frequency divider and the oscillation and phase discriminator are sequentially connected, and the oscillation and phase discriminator is further connected with the two variable frequency dividers through an amplifier; each variable frequency divider adopts a twenty-one system counter;
the oscillator synchronization apparatus includes: the energy storage device comprises an energy storage element, a first triode and a second triode, wherein the base electrode of the first triode is connected with the energy storage element, the collector electrode of the first triode is connected with the base electrode of the second triode, and the energy storage element comprises an inductance element and a capacitance element which are connected in parallel in multiple stages;
the output circuit includes: the device comprises a driver, a first resistor, a first capacitor, a second resistor, a third resistor, a second capacitor, a fourth resistor, a fifth resistor, a first diode and a second diode, wherein the output end of the driver is connected with one end of the first resistor, the other end of the first resistor is connected with the positive electrode of the first diode, the negative electrode of the first diode is connected with the first capacitor, the second resistor is connected with the first capacitor in parallel and is further connected to the third resistor, the positive electrode of the first diode is connected with the negative electrode of the second diode, the positive electrode of the second diode is connected to the second capacitor and the fifth resistor, one end of the second capacitor is grounded, and the other end of the second capacitor is connected with the fourth resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711219389.9A CN107800448B (en) | 2017-11-28 | 2017-11-28 | Medium wave transmitter frequency synthesizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711219389.9A CN107800448B (en) | 2017-11-28 | 2017-11-28 | Medium wave transmitter frequency synthesizer |
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| Publication Number | Publication Date |
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| CN107800448A CN107800448A (en) | 2018-03-13 |
| CN107800448B true CN107800448B (en) | 2023-06-16 |
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| CN201711219389.9A Active CN107800448B (en) | 2017-11-28 | 2017-11-28 | Medium wave transmitter frequency synthesizer |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB711943A (en) * | 1951-11-19 | 1954-07-14 | Rca Corp | Frequency control system for electric oscillation generators |
| JP2008236557A (en) * | 2007-03-22 | 2008-10-02 | Toshiba Corp | Frequency synthesizer and radio communication apparatus using same |
| CN103595425A (en) * | 2013-12-05 | 2014-02-19 | 苏州磐启微电子有限公司 | Two point type wireless transmitter |
| CN205356695U (en) * | 2015-12-09 | 2016-06-29 | 四川亨通网智科技有限公司 | GSM network MR measurement system |
| CN205377851U (en) * | 2015-12-09 | 2016-07-06 | 四川亨通网智科技有限公司 | MR measuring equipment receiving system based on take phase -locked loop local oscillator circuit |
-
2017
- 2017-11-28 CN CN201711219389.9A patent/CN107800448B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB711943A (en) * | 1951-11-19 | 1954-07-14 | Rca Corp | Frequency control system for electric oscillation generators |
| JP2008236557A (en) * | 2007-03-22 | 2008-10-02 | Toshiba Corp | Frequency synthesizer and radio communication apparatus using same |
| CN103595425A (en) * | 2013-12-05 | 2014-02-19 | 苏州磐启微电子有限公司 | Two point type wireless transmitter |
| CN205356695U (en) * | 2015-12-09 | 2016-06-29 | 四川亨通网智科技有限公司 | GSM network MR measurement system |
| CN205377851U (en) * | 2015-12-09 | 2016-07-06 | 四川亨通网智科技有限公司 | MR measuring equipment receiving system based on take phase -locked loop local oscillator circuit |
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| Publication number | Publication date |
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| CN107800448A (en) | 2018-03-13 |
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