CN104242919A - Q-waveband wireless communication eight-to-one structure 40MHz crystal oscillator frequency synthesizer - Google Patents
Q-waveband wireless communication eight-to-one structure 40MHz crystal oscillator frequency synthesizer Download PDFInfo
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- CN104242919A CN104242919A CN201310247804.7A CN201310247804A CN104242919A CN 104242919 A CN104242919 A CN 104242919A CN 201310247804 A CN201310247804 A CN 201310247804A CN 104242919 A CN104242919 A CN 104242919A
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Abstract
The invention belongs to the technical field of phase-locked loops, and particularly relates to a Q-waveband wireless communication eight-to-one structure 40MHz crystal oscillator frequency synthesizer. The Q-waveband wireless communication eight-to-one structure 40MHz crystal oscillator frequency synthesizer is simple in structure and comprises a 40MHz crystal oscillator, a first one-to-eight frequency divider, a phase frequency detector, a charge pump, a low pass filter, a quadrature voltage controlled oscillator, a second one-to-eight frequency divider, a one-to-six frequency divider and a 163/164/165/167/168/169/171/172/173 multimode frequency divider. The Q-waveband wireless communication eight-to-one structure 40MHz crystal oscillator frequency synthesizer is structurally characterized in that an output port of the 40MHz crystal oscillator is connected with an input port of the one-to-eight frequency divider, an output port of the one-to-eight frequency divider is connected with an input port of the quadrature voltage controlled oscillator, and an output port of the quadrature voltage controlled oscillator is connected with an input port of the charge pump.
Description
Technical field
the invention belongs to PHASE-LOCKED LOOP PLL TECHNIQUE field, particularly relate to a kind of Q-band radio communication 8 to 1 structure 40MHz crystal oscillator frequency synthesizer.
Background technology
millimeter wave radio communication is comparatively large due to its bandwidth, thus can realize the transmission rate up to Gbps magnitude, will become the mainstream technology of ultrahigh speed WLAN (wireless local area network).The consumer electronics manufacturers such as current NEC, Samsung, Panasonic and LG have set up WirelessHD alliance jointly to promote the application of millimeter-wave technology in transmitting without compression HD video, its huge market potential as seen.Millimeter-wave technology becomes the focus of academia and industrial quarters concern in the world at present, ISSCC (International Solid State Circuits Conference) is offered special topic every year and is collected the relevant paper of millimeter-wave technology, and all many-sided difficult points such as millimetre-wave circuit design, test are subject to extensive concern.Q-band frequency has that to realize difficulty relatively low, and frequency spectrum resource is feature relatively preferably, and the application study for this frequency range is at the early-stage.
Summary of the invention
the present invention is exactly for the problems referred to above, provides a kind of structure simple Q-band radio communication 8 to 1 structure 40MHz crystal oscillator frequency synthesizer.
for achieving the above object, the present invention adopts following technical scheme, the present invention includes 40MHz crystal oscillator, one 8 frequency divider, phase frequency detector (PFD), charge pump (CP), low pass filter (LPF), orthogonal voltage-controlled vibrator (QVCO), 28 frequency divider, 6 frequency dividers and 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider, the output port of its structural feature 40MHz crystal oscillator is connected with the input port of 8 frequency dividers, the output port of 8 frequency dividers is connected with the input port of phase frequency detector, the output port of phase frequency detector is connected with the input port of charge pump, the output port of charge pump is connected with low pass filter input port, low pass filter output port is connected with the input port of orthogonal voltage-controlled vibrator, the output port of orthogonal voltage-controlled vibrator is connected with the 28 fraction frequency device input end mouth, 28 frequency divider output port is connected with 6 fraction frequency device input end mouths, 6 frequency divider output ports are connected with 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider input port, 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider output port is connected with phase frequency detector input port.
as a kind of preferred version, 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider of the present invention adopts 2/3 dual-mode frequency divider structure of 7 grades of cascades.
beneficial effect of the present invention.
the present invention is applicable to the frequency synthesizer of Q-band millimeter wave by the combination composition of 40MHz crystal oscillator, the one 8 frequency divider, phase frequency detector, charge pump, low pass filter, orthogonal voltage-controlled vibrator, the 28 frequency divider, 6 frequency dividers and 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider, may be used for the transceiver of double conversion.In addition, structure of the present invention is relatively simple, is applicable to applying.
Accompanying drawing explanation
below in conjunction with the drawings and specific embodiments, the present invention will be further described.Scope is not only confined to the statement of following content.
fig. 1 is schematic block circuit diagram of the present invention.
Embodiment
as shown in the figure, the present invention includes 40MHz crystal oscillator, one 8 frequency divider, phase frequency detector, charge pump, low pass filter, orthogonal voltage-controlled vibrator, 28 frequency divider, 6 frequency dividers and 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider, the output port of 40MHz crystal oscillator is connected with the input port of 8 frequency dividers, the output port of 8 frequency dividers is connected with the input port of phase frequency detector, the output port of phase frequency detector is connected with the input port of charge pump, the output port of charge pump is connected with low pass filter input port, low pass filter output port is connected with the input port of orthogonal voltage-controlled vibrator, the output port of orthogonal voltage-controlled vibrator is connected with the 28 fraction frequency device input end mouth, 28 frequency divider output port is connected with 6 fraction frequency device input end mouths, 6 frequency divider output ports are connected with 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider input port, 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider output port is connected with phase frequency detector input port.
described 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider adopts 2/3 dual-mode frequency divider structure of 7 grades of cascades.
below in conjunction with accompanying drawing, the course of work of the present invention is described.
crystal oscillator frequency produces the reference frequency of 5MHz frequency as PFD after except 8, and frequency dividing ratio is controlled by 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider, and the frequency dividing ratio of multi-modulus frequency divider is by 2
7
+ 2
6
p
6
+ 2
5
p
5
+ 2
4
p
4
+ 2
3
p
3
+ 2
2
p
2
+ 2P
1
+ P
0
determine, by changing P
0
~ P
6
low and high level can realize between 128 ~ 255 all integral frequency divisioils, therefore contain 163/164/165/167/168/169/171/172/173 described frequency dividing ratio.Each frequency is realized by frequency dividing ratio below respectively below.
39.12GHz=8×6×163×5M P
6
=0 P
5
=1 P
4
=0 P
3
=0 P
2
=0 P
1
=1 P
0
=1。
×6×164×5M P
6
=0 P
5
=1 P
4
=0 P
3
=0 P
2
=1 P
1
=0 P
0
=0。
×6×165×5M P
6
=0 P
5
=1 P
4
=0 P
3
=0 P
2
=1 P
1
=0 P
0
=1。
×6×167×5M P
6
=0 P
5
=1 P
4
=0 P
3
=0 P
2
=1 P
1
=1 P
0
=1。
×6×168×5M P
6
=0 P
5
=1 P
4
=0 P
3
=1 P
2
=0 P
1
=0 P
0
=0。
×6×169×5M P
6
=0 P
5
=1 P
4
=0 P
3
=1 P
2
=0 P
1
=0 P
0
=1。
×6×171×5M P
6
=0 P
5
=1 P
4
=0 P
3
=1 P
2
=0 P
1
=1 P
0
=1。
×6×172×5M P
6
=0 P
5
=1 P
4
=0 P
3
=1 P
2
=1 P
1
=0 P
0
=0。
×6×173×5M P
6
=0 P
5
=1 P
4
=0 P
3
=1 P
2
=1 P
1
=0 P
0
=1。
as can be seen here, the frequency dividing ratio by changing multi-modulus frequency divider can produce nine one-level local frequencies of Q frequency range: 39.12GHz, 39.36GHz, 39.6GHz, 40.08GHz, 40.32GHz, 40.56GHz, 41.04GHz, 41.28GHz, 41.52GHz.
following nine secondary local frequencies can be produced in the loop: 4.89GHz, 4.92GHz, 4.95GHz, 5.01GHz, 5.04GHz, 5.07GHz, 5.13GHz, 5.16GHz, 5.19GHz by 8 frequency dividers.
be understandable that, above about specific descriptions of the present invention, the technical scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.
Claims (2)
1.Q wave band radio communication 8 to 1 structure 40MHz crystal oscillator frequency synthesizer, comprise 40MHz crystal oscillator, one 8 frequency divider, phase frequency detector, charge pump, low pass filter, orthogonal voltage-controlled vibrator, 28 frequency divider, 6 frequency dividers and 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider, it is characterized in that the output port of 40MHz crystal oscillator is connected with the input port of 8 frequency dividers, the output port of 8 frequency dividers is connected with the input port of phase frequency detector, the output port of phase frequency detector is connected with the input port of charge pump, the output port of charge pump is connected with low pass filter input port, low pass filter output port is connected with the input port of orthogonal voltage-controlled vibrator, the output port of orthogonal voltage-controlled vibrator is connected with the 28 fraction frequency device input end mouth, 28 frequency divider output port is connected with 6 fraction frequency device input end mouths, 6 frequency divider output ports are connected with 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider input port, 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider output port is connected with phase frequency detector input port.
2. Q-band radio communication 8 to 1 structure 40MHz crystal oscillator frequency synthesizer according to claim 1, is characterized in that described 163/164/165/167/168/169/171/172/173 multi-modulus frequency divider adopts 2/3 dual-mode frequency divider structure of 7 grades of cascades.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310247804.7A CN104242919A (en) | 2013-06-20 | 2013-06-20 | Q-waveband wireless communication eight-to-one structure 40MHz crystal oscillator frequency synthesizer |
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| CN201310247804.7A CN104242919A (en) | 2013-06-20 | 2013-06-20 | Q-waveband wireless communication eight-to-one structure 40MHz crystal oscillator frequency synthesizer |
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| Publication Number | Publication Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112970199A (en) * | 2018-11-01 | 2021-06-15 | 微芯片技术股份有限公司 | Multi-mode frequency divider |
-
2013
- 2013-06-20 CN CN201310247804.7A patent/CN104242919A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112970199A (en) * | 2018-11-01 | 2021-06-15 | 微芯片技术股份有限公司 | Multi-mode frequency divider |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141224 |