CN103607201B - The injection locking frequency divider of a kind of wide locking scope - Google Patents
The injection locking frequency divider of a kind of wide locking scope Download PDFInfo
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- CN103607201B CN103607201B CN201310613156.2A CN201310613156A CN103607201B CN 103607201 B CN103607201 B CN 103607201B CN 201310613156 A CN201310613156 A CN 201310613156A CN 103607201 B CN103607201 B CN 103607201B
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Abstract
The present invention discloses the injection locking frequency divider of a kind of wide locking scope, comprises and injects transistor, the first LC oscillator and the 2nd LC oscillator, the in-phase output end short circuit of the first LC oscillator and the 2nd LC oscillator; The grid access DC voltage bias of this injection transistor and two frequencys multiplication inject signal, and the source electrode of this injection transistor and drain electrode are connected to the first LC oscillator and the difference output end of the 2nd LC oscillator, it is achieved divide-by-two function. The present invention by receiving the difference output end of two complete identical LC oscillator respectively by the source and drain the two poles of the earth injecting transistor, it is possible to realizes injecting the wide locking scope that signal frequency is 49~81GHz; The breadth-length ratio of transistor is injected, it is possible to effectively realize moving of wide locking range of frequency by adjustment.
Description
Technical field
The present invention relates to the 60GHz millimeter-wave technology being applied to a new generation's ultra-high speed Wireless Personal Network WPAN (WirelessPersonalAreaNetwork), especially an injection locking frequency divider for wide locking scope is the important module circuit in 60GHz millimeter wave transceiver.
Background technology
60GHz millimeter wave radio communication, with the bandwidth of its transfer rate up to 4Gbps and 5GHz, becomes the one preferred technique of ultra-high speed Wireless Personal Network of future generation, especially has huge market outlook without field of consumer electronics such as compression HD video transmission over radio. 60GHz technology has become research focus in the world, and China's 60GHz millimeter wave radio communication is divided into two frequency range 42.3-48.4GHz and 59-64GHz frequency range, and order the first two frequency range all opens.
The advantage of 60GHz radio communication to realize the transfer rate up to Gbps magnitude. This technology will become the mainstream technology of ultra-high speed Wireless Personal Network. The consumer electronics manufacturers such as current NEC, Samsung, Panasonic and LG have set up WirelessHD alliance jointly to promote the application of 60GHz technology in transmitting without compression HD video, it is seen that its huge market potential. 60GHz technology becomes academia and the focus of industry member concern in the world at present, international solid-state circuit meeting (InternationalSolidStateCircuitsConference) is offered special topic every year and is collected the relevant paper of 60GHz technology, and all many-sided difficult points such as the design of 60GHz millimetre-wave circuit, test are subject to extensive concern. At present the 60GHz frequency spectrum of China opens, but due to technical difficulty relatively big, the applied research for this frequency range is in blank substantially.
Frequency divider is the important component part of phaselocked loop circuit. In the module of all phaselocked loop circuit, divider circuit is operated in most high frequency so that the design of frequency divider becomes challenge. Injection locking frequency divider is applicable to high-frequency range and low-power consumption, and this is that it has the advantage comparing other frequency dividers, it is necessary to the problem of solution expands large lock range. Compared with the frequency divider being operated in low frequency frequency range, the frequency divider design being applied to 60GHz frequency range has following difficult point: 1, operating frequency height; 2, wide locking scope is required; 3, low-power consumption is required; 4, to be quadratured little. Therefore, focus and difficult point are currently studied in the design of the frequency divider of wide locking scope.
Summary of the invention
(1) technical problem solved
In view of this, the main purpose of the present invention is to provide the injection locking frequency divider of a kind of wide locking scope, to expand the locking scope of frequency divider, meets the requirement being applicable to 60GHz millimeter wave radio communication system.
(2) technical scheme
For achieving the above object, the present invention provides the injection locking frequency divider of a kind of wide locking scope, comprise and inject transistor 1, first LC oscillator 2 and the 2nd LC oscillator 3, wherein: the in-phase output end short circuit of the first LC oscillator 2 and the 2nd LC oscillator 3; The grid access DC voltage bias of this injection transistor 1 and two frequencys multiplication inject signal, and the source electrode of this injection transistor 1 and drain electrode are connected to the first LC oscillator 2 and the difference output end of the 2nd LC oscillator 3, it is achieved divide-by-two function.
In such scheme, described first LC oscillator 2 is two completely identical LC oscillator with described 2nd LC oscillator 3.
In such scheme, the in-phase output end short circuit of described first LC oscillator 2 and the 2nd LC oscillator 3, it is the OUTP output terminal of the first LC oscillator 2 and the OUTP output terminal short circuit of the 2nd LC oscillator 3, the OUTN output terminal of the first LC oscillator 2 and the OUTN output terminal short circuit of the 2nd LC oscillator 3.
In such scheme, by injecting the mixing effect of transistor 1, output signal frequency is followed the tracks of and is injected signal frequency change, it is achieved injects the wide locking scope that signal frequency is 49��81GHz, produces differential output signal.
(3) useful effect
The injection locking frequency divider of wide locking scope provided by the invention, by the in-phase output end of two complete identical LC oscillator is connected, inject the source electrode of transistor and drain and be connected on the difference output end of two vibrators respectively, thus realize the novel injection locking frequency divider structure of divide-by-two function, achieve and inject the wide locking scope that signal frequency is 49��81GHz, it is possible to be applicable to 60GHz millimeter wave radio communication system.
Accompanying drawing explanation
Fig. 1 is the schematic circuit of traditional injection locking frequency divider;
Fig. 2 is the behavioral scaling model of injection locking frequency divider;
Fig. 3 is the model injecting transistor;
Fig. 4 is the schematic circuit of the injection locking frequency divider of wide locking scope provided by the invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
In traditional injection locking frequency divider, as shown in Figure 1, difference output termination in cross-coupled pair LC oscillator enters to inject transistor 1, injects the grid access DC voltage bias of transistor 1 and injects signal, difference output end output difference sub-signal OUTP and OUTN of vibrator 2.
According to injection locking principle, injecting transistor and be equivalent to frequency mixer, inductance capacitance tank circuit is equivalent to wave filter. When the resonant frequency of inductance capacitance tank circuit is at ��0Time neighbouring, if injecting grid frequency input signal ��=2 �� of transistor0, then injection transistor amasss as the mixing that frequency mixer produces and existence is positioned at ��0The mixing item at frequency place. If now circuit meets the phase-shift phase required for Barkhausen's criterion, so this circuit just can produce stable oscillation output signal, and output signal frequency is the half injecting signal frequency, thus realizes divide-by-two function. Oscillation frequency, by following the tracks of the change of frequency input signal, remains two divided-frequency relation within the scope of locking. When phase-shift phase needed for circuit no longer meets Barkhausen's criterion, then circuit loses locking.
Injecting transistor to be counted as being a frequency mixer, the voltage that the electric current that frequency mixer exports can be converted to frequency divider by inductance capacitance resonant cavity exports. The behavioral scaling model of injection locking frequency divider is as shown in Figure 2. Such frequency mixer operationally can introduce a phase shift ��, for ensure loop can steady operation, tank circuit will deviate original tuning-points, and to introduce, another one phase shift �� makes the two add up to zero, alpha+beta=0.
Inject transistor, when direct current and two frequency multiplication signal injections, there is different phase response. When direct current injects, frequency mixer can not introduce phase shift, i.e. ��=0, and divider circuit meeting resonance is at original frequency place; During two frequency multiplication signal injections, frequency mixer can introduce phase shiftThe tuning-points of divider circuit can offset, and phase shift introduced by tank circuitTotal phase-shift phase is made to be zero. The phase shift can introduced due to tank circuit is limited, and under the prerequisite ensureing loop stability, the frequency shift of tuning-points is also limited, limits the locking scope of frequency divider. The model injecting transistor is as shown in Figure 3.
As shown in Figure 4, the present invention provides the injection locking frequency divider of a kind of wide locking scope, comprise and inject transistor 1, first LC oscillator 2 and the 2nd LC oscillator 3, wherein: the in-phase output end short circuit of the first LC oscillator 2 and the 2nd LC oscillator 3; The grid access DC voltage bias of this injection transistor 1 and two frequencys multiplication inject signal, and the source electrode of this injection transistor 1 and drain electrode are connected to the first LC oscillator 2 and the difference output end of the 2nd LC oscillator 3, it is achieved divide-by-two function.
In Fig. 4, the first LC oscillator 2 is two completely identical LC oscillator with the 2nd LC oscillator 3. The in-phase output end short circuit of the first LC oscillator 2 and the 2nd LC oscillator 3, it is the OUTP output terminal of the first LC oscillator 2 and the OUTP output terminal short circuit of the 2nd LC oscillator 3, the OUTN output terminal of the first LC oscillator 2 and the OUTN output terminal short circuit of the 2nd LC oscillator 3. By injecting the mixing effect of transistor 1, output signal frequency is followed the tracks of and is injected signal frequency change, it is achieved injects the wide locking scope that signal frequency is 49��81GHz, produces differential output signal.
In the injection locking frequency divider of wide locking scope provided by the invention, as shown in Figure 4, adopt two complete identical LC oscillator, their respective OUTP and OUTN output terminals are shorted together, source electrode and the drain electrode of injecting transistor are connected on OUTP and OUTN output terminal respectively, and grid access DC voltage bias and two frequencys multiplication of injecting transistor inject signal. When inject signal frequency within the specific limits time, the output terminal of vibrator exports the difference signal of 1/2nd injection frequencies, circuit realiration divide-by-two function. Theoretical according to phase shift compensation, owing to have employed two complete identical vibrators, when two frequency multiplication signal injections, each vibrator only needs to contribute the phase shift of halfTotal phase-shift phase is made to beCompensate for the phase shift that frequency mixer is introducedThe phase shift making whole loop is 0. Like this, when frequency mixer introduces phase shift ��, the phase shift total amount that tank circuit can compensate will improve greatly, so that the locking scope of frequency divider improves greatly. This frequency divider achieves and injects the wide locking scope that signal frequency scope is 49��81GHz.
The injection locking frequency divider of wide locking scope provided by the invention, by receiving the difference output end of two complete identical LC oscillator respectively by the source and drain the two poles of the earth injecting transistor, it is possible to realizes injecting the wide locking scope that signal frequency is 49��81GHz; The breadth-length ratio of transistor is injected, it is possible to effectively realize moving of wide locking range of frequency by adjustment. This injection locking frequency divider exports two paths of differential signals, can be used as the frequency divider of high frequency phase locked loop circuit.
Above-described specific embodiment; the object of the present invention, technical scheme and useful effect have been further described; it is it should be understood that; the foregoing is only specific embodiments of the invention; it is not limited to the present invention; within the spirit and principles in the present invention all, any amendment of making, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. an injection locking frequency divider for wide locking scope, comprises and injects transistor (1), the first LC oscillator (2) and the 2nd LC oscillator (3), it is characterised in that:
The in-phase output end short circuit of the first LC oscillator (2) and the 2nd LC oscillator (3);
The grid access DC voltage bias of this injection transistor (1) and two frequencys multiplication inject signal, the source electrode of this injection transistor (1) and drain electrode are connected to the difference output end of the first LC oscillator (2) with the 2nd LC oscillator (3), it is achieved divide-by-two function;
Wherein, by injecting the mixing effect of transistor (1), output signal frequency is followed the tracks of and is injected signal frequency change, it is achieved injects the wide locking scope that signal frequency is 49��81GHz, produces differential output signal.
2. the injection locking frequency divider of wide locking scope according to claim 1, it is characterized in that, described first LC oscillator (2) is two completely identical LC oscillator with described 2nd LC oscillator (3).
3. the injection locking frequency divider of wide locking scope according to claim 1, it is characterized in that, the in-phase output end short circuit of described first LC oscillator (2) and the 2nd LC oscillator (3), it is the OUTP output terminal of the first LC oscillator (2) and the OUTP output terminal short circuit of the 2nd LC oscillator (3), the OUTN output terminal of the first LC oscillator (2) and the OUTN output terminal short circuit of the 2nd LC oscillator (3).
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10270630B2 (en) | 2014-09-15 | 2019-04-23 | Analog Devices, Inc. | Demodulation of on-off-key modulated signals in signal isolator systems |
| US9660848B2 (en) * | 2014-09-15 | 2017-05-23 | Analog Devices Global | Methods and structures to generate on/off keyed carrier signals for signal isolators |
| US10536309B2 (en) | 2014-09-15 | 2020-01-14 | Analog Devices, Inc. | Demodulation of on-off-key modulated signals in signal isolator systems |
| US9998301B2 (en) | 2014-11-03 | 2018-06-12 | Analog Devices, Inc. | Signal isolator system with protection for common mode transients |
| CN106026924A (en) * | 2016-05-11 | 2016-10-12 | 复旦大学 | Terahertz wave CMOS injection-locking frequency multiplier applied to bioimaging |
| CN106487382B (en) * | 2016-10-13 | 2019-07-19 | 天津大学 | A kind of injection locking frequency divider of multimode frequency dividing |
| CN106533438B (en) * | 2016-10-21 | 2019-02-22 | 天津大学 | A kind of Terahertz frequency synthesizer realized using CMOS technology |
| US10135452B2 (en) * | 2017-02-21 | 2018-11-20 | Infineon Technologies Ag | Digital frequency synthesizer with robust injection locked divider |
| CN107124181B (en) * | 2017-03-28 | 2021-06-04 | 复旦大学 | Injection locking frequency divider circuit with wide locking range |
| CN110729998B (en) * | 2019-10-13 | 2023-05-30 | 天津大学 | Broadband injection locking frequency divider based on distributed injection and transformer |
| CN111726139B (en) * | 2020-06-17 | 2022-02-01 | 广州昂瑞微电子技术有限公司 | Divide by two frequency division circuit and bluetooth transceiver |
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| CN102158228A (en) * | 2011-04-19 | 2011-08-17 | 复旦大学 | Very low voltage millimeter wave injection-locked dichotomous frequency divider |
| CN102386915A (en) * | 2010-09-06 | 2012-03-21 | 财团法人工业技术研究院 | Injection locking frequency divider |
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| TWI329975B (en) * | 2006-09-27 | 2010-09-01 | Univ Nat Taiwan Science Tech | Injection-locked frequency divider |
| TW200840226A (en) * | 2007-03-22 | 2008-10-01 | Univ Nat Taiwan Science Tech | Injection locked frequency divider |
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| CN102386915A (en) * | 2010-09-06 | 2012-03-21 | 财团法人工业技术研究院 | Injection locking frequency divider |
| CN102158228A (en) * | 2011-04-19 | 2011-08-17 | 复旦大学 | Very low voltage millimeter wave injection-locked dichotomous frequency divider |
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Effective date of registration: 20201217 Address after: 510000 601, building a, 136 Kaiyuan Avenue, Huangpu District, Guangzhou City, Guangdong Province Patentee after: AoXin integrated circuit technology (Guangdong) Co.,Ltd. Address before: 100083 Beijing city Chaoyang District Beitucheng West Road No. 3 Patentee before: Institute of Microelectronics, Chinese Academy of Sciences |
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Effective date of registration: 20220429 Address after: 510000 room 710, Jianshe building, No. 348, Kaifa Avenue, Huangpu District, Guangzhou, Guangdong Patentee after: Ruili flat core Microelectronics (Guangzhou) Co.,Ltd. Address before: 510000 601, building a, 136 Kaiyuan Avenue, Huangpu District, Guangzhou City, Guangdong Province Patentee before: AoXin integrated circuit technology (Guangdong) Co.,Ltd. |