CN213547493U - Frequency source with high integration - Google Patents
Frequency source with high integration Download PDFInfo
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- CN213547493U CN213547493U CN202022770461.0U CN202022770461U CN213547493U CN 213547493 U CN213547493 U CN 213547493U CN 202022770461 U CN202022770461 U CN 202022770461U CN 213547493 U CN213547493 U CN 213547493U
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Abstract
The utility model provides a frequency source of high integration degree, the frequency source includes: the device comprises a prescaler, a phase discriminator, a low-pass filter, a voltage-controlled oscillator, an operational amplifier and a band-pass filter; the input end of the prescaler is connected with an input signal, the prescaler, the phase discriminator, the low-pass filter, the voltage-controlled oscillator, the operational amplifier and the band-pass filter are sequentially connected in series to form a low stray circuit, and an output signal of the band-pass filter is used as the output of a frequency source with high integration level; a feedback frequency divider is connected in series between the voltage-controlled oscillator and the phase discriminator, the output end of the voltage-controlled oscillator is connected to the input end of the feedback frequency divider, and the output end of the feedback frequency divider is connected to the feedback end of the phase discriminator; the input end of the operational amplifier is connected with a control circuit. The utility model discloses a frequency source of high integration has characteristics miniaturized, high integration, high reliable, low-power consumption, low spurious, and can the direct welded circuit board, simple structure, reasonable in design, easily solidification production.
Description
Technical Field
The utility model relates to the field of signal technology, particularly, relate to a frequency source of high integration.
Background
With the rapid development of wireless communication technology, the research and application of frequency synthesizers become more and more important, and especially, the frequency synthesizers are widely applied in the national defense fields of satellite communication, radar positioning, electronic countermeasure and the like, and the performance of the frequency synthesizers directly affects the performance of the whole communication system, which puts higher requirements on the frequency synthesizers.
However, the existing low spurious frequency synthesizer generally has the problems of low integration level, high power consumption and spurious indexes. In order to solve the above problem, the present invention provides a frequency source with high integration.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the problem that exists among the prior art, further provide a frequency source of high integration, this frequency source has miniaturization, high integration, high reliable, low-power consumption and low spurious characteristics.
The embodiment of the utility model discloses a realize through following technical scheme: a high integration frequency source, the frequency source comprising: the device comprises a prescaler, a phase discriminator, a low-pass filter, a voltage-controlled oscillator, an operational amplifier and a band-pass filter;
the input end of the prescaler is connected with an input signal, the prescaler, the phase discriminator, the low-pass filter, the voltage-controlled oscillator, the operational amplifier and the band-pass filter are sequentially connected in series to form a low stray circuit, and an output signal of the band-pass filter is used as the output of a frequency source with high integration level;
a feedback frequency divider is connected in series between the voltage-controlled oscillator and the phase detector, the output end of the voltage-controlled oscillator is connected to the input end of the feedback frequency divider, and the output end of the feedback frequency divider is connected to the feedback end of the phase detector; and the input end of the operational amplifier is connected with a control circuit.
According to a preferred embodiment, the control circuit comprises an MCU and a dc chopper, the first output terminal of the dc chopper being connected to the first input terminal of the MCU, the second output terminal of the dc chopper being connected to the input terminal of the low spur circuit, the third output terminal of the dc chopper being connected to the input terminal of the operational amplifier.
According to a preferred embodiment, the MCU comprises 4 digital signal control ports, LD output port, LE input port, DAT circuit data input port and CLK clock signal input port.
According to a preferred embodiment, the input end of the dc chopper is connected with a +5V dc voltage circuit and a +20V dc voltage circuit.
According to a preferred embodiment, the frequency source further comprises an instruction generation unit, which is connected to the control circuit.
According to a preferred embodiment, the instruction generating unit is a PC or an embedded device.
According to a preferred embodiment, the frequency source further comprises a plurality of ground portions provided on the printed circuit board.
According to a preferred embodiment, there are four grounding portions.
The utility model discloses technical scheme has following advantage and beneficial effect at least: the utility model discloses a frequency source of high integration is based on the circuit improvement, compares with traditional low stray frequency source, has characteristics miniaturized, high integration, high reliable, low-power consumption, low stray, but and direct welded circuit board, simple structure, reasonable in design, easily solidification production.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a low stray circuit provided in embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a control circuit provided in embodiment 1 of the present invention;
fig. 3 is a circuit diagram of a frequency source provided in embodiment 1 of the present invention;
fig. 4 is a schematic diagram of a frequency source provided in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1 to 4, the present embodiment provides a frequency source with high integration, the frequency source including: the device comprises a prescaler, a phase discriminator, a low-pass filter, a voltage-controlled oscillator, an operational amplifier and a band-pass filter;
the input end of the prescaler is connected with an input signal, and optionally, the input signal is a REF input; the prescaler, the phase discriminator, the low-pass filter, the voltage-controlled oscillator, the operational amplifier and the band-pass filter are sequentially connected in series to form a low spurious circuit, so that the frequency source of the embodiment has high integration degree and accords with low spurious indexes; the output signal of the band-pass filter is used as the output of the frequency source with high integration level, and optionally, the output signal is the RF output;
a feedback frequency divider is connected in series between the voltage-controlled oscillator and the phase discriminator, the output end of the voltage-controlled oscillator is connected to the input end of the feedback frequency divider, and the output end of the feedback frequency divider is connected to the feedback end of the phase discriminator; the input end of the operational amplifier is connected with a control circuit; the operational amplifier and the voltage controlled oscillator in this embodiment function to generate a frequency.
As the utility model discloses a technical optimization scheme, control circuit include MCU and direct current chopper, and direct current chopper's first output is connected to MCU's first input, and direct current chopper's second output is connected to low stray circuit's input, and direct current chopper's third output is connected to operational amplifier's input.
As a technical optimization scheme of the utility model, MCU includes 4 digital signal control ports, is LD output port, LE input port, DAT circuit data input port and CLK clock signal input port respectively.
As a technical optimization scheme of the utility model, the input of direct current chopper is connected with +5V direct current voltage circuit and +20V direct current voltage circuit.
As a technical optimization scheme of the present invention, the frequency source further includes an instruction generating unit, and the instruction generating unit is connected to the control circuit.
As a technical optimization scheme of the utility model, the instruction produces the unit and is PC or embedded equipment.
As a technical optimization scheme of the present invention, the frequency source further includes a plurality of grounding portions disposed on the printed circuit board.
As a technical optimization scheme of the utility model, the ground connection portion is equipped with four.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A high integration frequency source, comprising: the device comprises a prescaler, a phase discriminator, a low-pass filter, a voltage-controlled oscillator, an operational amplifier and a band-pass filter;
the input end of the prescaler is connected with an input signal, the prescaler, the phase discriminator, the low-pass filter, the voltage-controlled oscillator, the operational amplifier and the band-pass filter are sequentially connected in series to form a low stray circuit, and an output signal of the band-pass filter is used as the output of a frequency source with high integration level;
a feedback frequency divider is connected in series between the voltage-controlled oscillator and the phase detector, the output end of the voltage-controlled oscillator is connected to the input end of the feedback frequency divider, and the output end of the feedback frequency divider is connected to the feedback end of the phase detector; and the input end of the operational amplifier is connected with a control circuit.
2. The high-integration frequency source according to claim 1, wherein the control circuit comprises an MCU and a dc chopper, a first output terminal of the dc chopper being connected to a first input terminal of the MCU, a second output terminal of the dc chopper being connected to an input terminal of the low spur circuit, and a third output terminal of the dc chopper being connected to an input terminal of the operational amplifier.
3. The high-integration frequency source according to claim 2, wherein the MCU includes 4 digital signal control ports, which are an LD output port, an LE input port, a DAT circuit data input port, and a CLK clock signal input port, respectively.
4. The highly integrated frequency source according to claim 2, wherein +5V dc voltage circuit and +20V dc voltage circuit are connected to the input terminal of the dc chopper.
5. The high integration frequency source of claim 1, further comprising an instruction generation unit coupled to the control circuit.
6. The highly integrated frequency source according to claim 5, wherein the instruction generating unit is a PC or an embedded device.
7. The high integration frequency source of claim 1, further comprising a plurality of ground portions disposed on a printed circuit board.
8. The highly integrated frequency source according to claim 7, wherein the ground portions are provided in four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022770461.0U CN213547493U (en) | 2020-11-25 | 2020-11-25 | Frequency source with high integration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022770461.0U CN213547493U (en) | 2020-11-25 | 2020-11-25 | Frequency source with high integration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213547493U true CN213547493U (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022770461.0U Active CN213547493U (en) | 2020-11-25 | 2020-11-25 | Frequency source with high integration |
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| CN (1) | CN213547493U (en) |
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- 2020-11-25 CN CN202022770461.0U patent/CN213547493U/en active Active
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