CN107769773B - Clock distribution circuit - Google Patents
Clock distribution circuit Download PDFInfo
- Publication number
- CN107769773B CN107769773B CN201711299364.4A CN201711299364A CN107769773B CN 107769773 B CN107769773 B CN 107769773B CN 201711299364 A CN201711299364 A CN 201711299364A CN 107769773 B CN107769773 B CN 107769773B
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- inductor
- capacitor
- resistor
- circuit
- filter
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- 239000013078 crystal Substances 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 75
- 238000010586 diagram Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- 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
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
Abstract
The invention relates to the field of electronic measuring instruments, in particular to a clock distribution circuit. The constant-temperature crystal oscillator comprises a constant-temperature crystal oscillator for generating a basic clock frequency and a first amplifier, wherein the first amplifier outputs signals to a power divider through a second filter circuit, the power divider divides the signals into four paths and outputs the four paths, and a fourth path of output signals are output through a third filter circuit; the device also comprises a fourth filter amplifying circuit, wherein the fourth filter amplifying circuit outputs signals through a sixth filter circuit; the clock distribution circuit provided by the invention applies the digital step attenuator, and enables the circuit to work more stably through a specific signal processing flow, and simultaneously outputs the radio frequency signal in the target range.
Description
Technical Field
The invention relates to the field of electronic measuring instruments, in particular to a clock distribution circuit.
Background
In the field of radio frequency signals, an electronic measuring instrument is an indispensable testing instrument, a signal source in the electronic measuring instrument is a core device of the electronic measuring instrument and is mainly responsible for generating radio signals with specific frequency and amplitude, if the signal source is the core device of the electronic measuring instrument, a clock distribution circuit is the core circuit of the signal source, and the characteristics of the clock distribution circuit directly determine whether the signal source can generate qualified signals.
Disclosure of Invention
The invention aims to provide a clock distribution circuit for an electronic measuring instrument signal source, which is in face of the technical requirement that a stable clock distribution circuit is required for a good signal source.
In order to achieve the above object, the present invention provides the following technical solutions:
a clock distribution circuit includes a clock distribution circuit including,
the constant-temperature crystal oscillator is used for generating basic clock frequency according to a control signal, outputting the basic clock frequency to the first amplifier through the first capacitor, the first resistor and the second resistor which are connected in series, and outputting the basic clock frequency to the fourth filter amplifying circuit through the first capacitor, the first resistor and the third resistor;
the first amplifier outputs the signal to the power divider through the second filter circuit, the power divider divides the signal into four paths and outputs the signal, and the fourth path of output signal is output through the third filter circuit; the output end of the first amplifier is also connected with a power supply through a first filter circuit;
the fourth filter amplifying circuit outputs signals through a sixth filter circuit; the output end of the fourth filter amplifying circuit is also connected with a power supply through a fifth filter circuit.
Further, the first filter circuit comprises a first inductor, a ninth inductor, a fifth resistor and a second inductor which are sequentially connected;
the free end of the first inductor is connected with a power supply, and the free end of the first inductor is grounded through a second capacitor; one end of the first inductor, which is connected with the ninth inductor, is grounded through a third capacitor.
Further, the second filter circuit comprises a fifth capacitor, a third inductor, a fourth inductor and a sixth capacitor which are sequentially connected; the free end of the fifth capacitor is connected with the output end of the first amplifier; one end of the fifth capacitor, which is connected with the third inductor, is grounded through a seventh capacitor; one end of the third inductor, which is connected with the fourth inductor, is grounded through an eighth capacitor; one end of the fourth inductor, which is connected with the sixth capacitor, is grounded through the ninth capacitor.
Further, the third filter circuit comprises a tenth capacitor and a first pi-shaped circuit connected with the tenth capacitor in series; the first pi-shaped circuit is composed of a sixth resistor, a seventh resistor and an eighth resistor which form pi shapes.
Further, the fourth filter amplifying circuit comprises an eleventh capacitor, a second pi-shaped circuit, a twelfth capacitor and a second amplifier which are sequentially connected in series;
the second pi-shaped circuit is composed of a ninth resistor, a tenth resistor and an eleventh resistor which form pi shapes.
Further, the fifth filter circuit comprises a fifth inductor, a tenth inductor, a thirteenth resistor and a sixth inductor which are sequentially connected;
the free end of the fifth inductor is connected with a power supply, and the free end of the fifth inductor is grounded through a thirteenth capacitor; one end of the fifth inductor, which is connected with the tenth inductor, is grounded through a fourteenth capacitor.
Further, the sixth filter circuit comprises a fifteenth capacitor, a seventh inductor, an eighth inductor and a third pi-shaped circuit which are sequentially connected;
one end of the seventh inductor, which is connected with the fifteenth capacitor, is grounded through a sixteenth capacitor; one end of the seventh inductor, which is connected with the eighth inductor, is connected with the seventeenth capacitor; one end of the eighth inductor, which is connected with the third pi-shaped circuit, is grounded through an eighteenth capacitor; meanwhile, two ends of the seventh inductor are connected through a nineteenth capacitor; two ends of the eighth inductor are connected through a twentieth capacitor;
the third pi-shaped circuit is composed of a fourteenth resistor, a fifteenth resistor and a sixteenth resistor which form pi shapes.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a clock distribution circuit for an electronic measuring instrument signal source, which uses a digital step attenuator and enables the circuit to work more stably through a specific signal processing flow and simultaneously outputs radio frequency signals in a target range.
Description of the drawings:
fig. 1 is a functional block diagram of the present invention.
FIG. 2 is a circuit diagram of a constant temperature crystal oscillator in the invention.
Fig. 3 is a circuit connection diagram of the first amplifier, the first filter circuit, the second filter circuit and the power divider in the present invention.
Fig. 4 is a circuit diagram of a third filter circuit according to the present invention.
Fig. 5 is a circuit connection diagram of a fourth filter amplifier circuit and a fifth filter circuit in the present invention.
Fig. 6 is a circuit diagram of a sixth filter circuit according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings and specific examples. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.
Example 1: as shown in fig. 1 to 6, the present embodiment provides a clock distribution circuit including,
the constant temperature crystal oscillator 1 is configured to generate a basic clock frequency according to a control signal, and output the basic clock frequency to the first amplifier 2 (N13 in fig. 3) through the first capacitor C215, the first resistor R91, and the second resistor R89 connected in series, and output the basic clock frequency to the fourth filter amplifying circuit 7 through the first capacitor C215, the first resistor R91, and the third resistor R94.
The first amplifier 2 outputs the signal to the power divider 5 (N11 in fig. 3) through the second filter circuit 4, and in this embodiment, the power divider 5 divides the signal into four paths and outputs the signal, wherein the fourth path of output signal is output through the third filter circuit 6; the output end of the first amplifier 2 is also connected with a +5Vam power supply through a first filter circuit 3; the first filter circuit 3 comprises a first inductor L8, a ninth inductor L9, a fifth resistor R88 and a second inductor L10 which are sequentially connected; the free end of the first inductor L8 is connected with a power supply, and meanwhile, the free end of the first inductor L8 is grounded through a second capacitor C117; one end of the first inductor L8 connected with the ninth inductor L9 is grounded through a third capacitor C119.
The second filter circuit 4 includes a fifth capacitor C141, a third inductor L52, a fourth inductor L53, and a sixth capacitor C213, which are sequentially connected; the free end of the fifth capacitor C141 is connected with the output end of the first amplifier N13; one end of the fifth capacitor C141 connected to the third inductor L52 is further grounded through a seventh capacitor C222; one end of the third inductor L52 connected with the fourth inductor L53 is grounded through an eighth capacitor C223; one end of the fourth inductor L53 connected to the sixth capacitor C213 is also grounded through a ninth capacitor C224. In this embodiment, the first amplifier N13 employs ERA-4SM; the third filter circuit comprises a tenth capacitor C221 and a first pi-shaped circuit connected with the tenth capacitor C221 in series; the first pi-shaped circuit is composed of a sixth resistor R90, a seventh resistor R92 and an eighth resistor R93 which form pi shapes.
The fourth filter amplification circuit 7 outputs a signal through the sixth filter circuit 9; the output end of the fourth filter amplification circuit 7 is also connected with a power supply through a fifth filter circuit 8. The circuit comprises an eleventh capacitor C107, a second pi-shaped circuit, a twelfth capacitor C152 and a second amplifier N10 which are sequentially connected in series; the second pi-shaped circuit is composed of a ninth resistor R96, a tenth resistor R95, and an eleventh resistor R107 which form pi-shapes.
The fifth filter circuit 8 includes a fifth inductor L57, a tenth inductor L80, a thirteenth resistor R79, and a sixth inductor L19, which are sequentially connected; the free end of the fifth inductor L57 is connected with a power supply, and meanwhile, the free end of the fifth inductor L57 is grounded through a thirteenth capacitor C83; one end of the fifth inductor L57 connected to the tenth inductor L80 is grounded through a fourteenth capacitor C108.
The sixth filter circuit 9 includes a fifteenth capacitor C153, a seventh inductor L34, an eighth inductor L35, and a third pi-shaped circuit connected in sequence; one end of the seventh inductor L34 connected with the fifteenth capacitor C153 is grounded through a sixteenth capacitor C334; one end of the seventh inductor L34 connected with the eighth inductor L35 is connected with the seventeenth capacitor C336; one end of the eighth inductor L35 connected with the third pi-shaped circuit is grounded through an eighteenth capacitor C335; meanwhile, two ends of the seventh inductor L34 are connected through a nineteenth capacitor C332; two ends of the eighth inductor L35 are connected through a twentieth capacitor C333; the third pi-shaped circuit is composed of a fourteenth resistor R61, a fifteenth resistor R62 and a sixteenth resistor R63 which form pi-shapes.
Claims (1)
1. A clock distribution circuit is characterized by comprising,
the constant-temperature crystal oscillator is used for generating basic clock frequency according to a control signal, outputting the basic clock frequency to the first amplifier through the first capacitor, the first resistor and the second resistor which are connected in series, and outputting the basic clock frequency to the fourth filter amplifying circuit through the first capacitor, the first resistor and the third resistor;
the first amplifier outputs the signal to the power divider through the second filter circuit, the power divider divides the signal into four paths and outputs the signal, and the fourth path of output signal is output through the third filter circuit; the output end of the first amplifier is also connected with a power supply through a first filter circuit;
the fourth filter amplifying circuit outputs signals through a sixth filter circuit; the output end of the fourth filter amplifying circuit is also connected with a power supply through a fifth filter circuit;
the first filter circuit comprises a first inductor, a ninth inductor, a fifth resistor and a second inductor which are sequentially connected;
the free end of the first inductor is connected with a power supply, and the free end of the first inductor is grounded through a second capacitor; one end of the first inductor, which is connected with the ninth inductor, is grounded through a third capacitor;
the second filter circuit comprises a fifth capacitor, a third inductor, a fourth inductor and a sixth capacitor which are sequentially connected; the free end of the fifth capacitor is connected with the output end of the first amplifier; one end of the fifth capacitor, which is connected with the third inductor, is grounded through a seventh capacitor; one end of the third inductor, which is connected with the fourth inductor, is grounded through an eighth capacitor; one end of the fourth inductor, which is connected with the sixth capacitor, is grounded through a ninth capacitor;
the third filter circuit comprises a tenth capacitor and a first pi-shaped circuit connected with the tenth capacitor in series; the first pi-shaped circuit consists of a sixth resistor, a seventh resistor and an eighth resistor which form pi shapes;
the fourth filter amplifying circuit comprises an eleventh capacitor, a second pi-shaped circuit, a twelfth capacitor and a second amplifier which are sequentially connected in series;
the second pi-shaped circuit consists of a ninth resistor, a tenth resistor and an eleventh resistor which form pi shapes;
the fifth filter circuit comprises a fifth inductor, a tenth inductor, a thirteenth resistor and a sixth inductor which are sequentially connected;
the free end of the fifth inductor is connected with a power supply, and the free end of the fifth inductor is grounded through a thirteenth capacitor; one end of the fifth inductor, which is connected with the tenth inductor, is grounded through a fourteenth capacitor;
the sixth filter circuit comprises a fifteenth capacitor, a seventh inductor, an eighth inductor and a third pi-shaped circuit which are sequentially connected;
one end of the seventh inductor, which is connected with the fifteenth capacitor, is grounded through a sixteenth capacitor; one end of the seventh inductor, which is connected with the eighth inductor, is connected with the seventeenth capacitor; one end of the eighth inductor, which is connected with the third pi-shaped circuit, is grounded through an eighteenth capacitor; meanwhile, two ends of the seventh inductor are connected through a nineteenth capacitor; two ends of the eighth inductor are connected through a twentieth capacitor;
the third pi-shaped circuit is composed of a fourteenth resistor, a fifteenth resistor and a sixteenth resistor which form pi shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711299364.4A CN107769773B (en) | 2017-12-08 | 2017-12-08 | Clock distribution circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711299364.4A CN107769773B (en) | 2017-12-08 | 2017-12-08 | Clock distribution circuit |
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| CN107769773A CN107769773A (en) | 2018-03-06 |
| CN107769773B true CN107769773B (en) | 2024-01-30 |
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| CN201711299364.4A Active CN107769773B (en) | 2017-12-08 | 2017-12-08 | Clock distribution circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109391334A (en) * | 2018-12-18 | 2019-02-26 | 成都前锋电子仪器有限责任公司 | Room temperature for radio integration test module calibrates circuit |
Citations (7)
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|---|---|---|---|---|
| KR19980077382A (en) * | 1997-04-18 | 1998-11-16 | 김영환 | System Clock Generator of Electronic Switching System |
| US6538499B1 (en) * | 2002-01-09 | 2003-03-25 | Xilinx, Inc. | Low jitter transmitter architecture with post PLL filter |
| RU2233457C1 (en) * | 2003-03-31 | 2004-07-27 | Шишков Виктор Александрович | Wide-band scanning wide-band gating complex altimeter-goniometer |
| CN103888876A (en) * | 2014-03-31 | 2014-06-25 | 深圳市冠旭电子有限公司 | Earphone noise processing circuit and earphones |
| CN204741441U (en) * | 2015-06-09 | 2015-11-04 | 柳州师范高等专科学校 | A signal filtering circuit for unmanned aerial vehicle |
| CN206135884U (en) * | 2016-09-23 | 2017-04-26 | 安徽四创电子股份有限公司 | Filter module is divided to 60MHz switch merit |
| CN207369017U (en) * | 2017-12-08 | 2018-05-15 | 成都前锋电子仪器有限责任公司 | A kind of clock distribution circuit |
-
2017
- 2017-12-08 CN CN201711299364.4A patent/CN107769773B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980077382A (en) * | 1997-04-18 | 1998-11-16 | 김영환 | System Clock Generator of Electronic Switching System |
| US6538499B1 (en) * | 2002-01-09 | 2003-03-25 | Xilinx, Inc. | Low jitter transmitter architecture with post PLL filter |
| RU2233457C1 (en) * | 2003-03-31 | 2004-07-27 | Шишков Виктор Александрович | Wide-band scanning wide-band gating complex altimeter-goniometer |
| CN103888876A (en) * | 2014-03-31 | 2014-06-25 | 深圳市冠旭电子有限公司 | Earphone noise processing circuit and earphones |
| CN204741441U (en) * | 2015-06-09 | 2015-11-04 | 柳州师范高等专科学校 | A signal filtering circuit for unmanned aerial vehicle |
| CN206135884U (en) * | 2016-09-23 | 2017-04-26 | 安徽四创电子股份有限公司 | Filter module is divided to 60MHz switch merit |
| CN207369017U (en) * | 2017-12-08 | 2018-05-15 | 成都前锋电子仪器有限责任公司 | A kind of clock distribution circuit |
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