WO2013011972A1 - 位相比較装置およびdll回路 - Google Patents
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- WO2013011972A1 WO2013011972A1 PCT/JP2012/068056 JP2012068056W WO2013011972A1 WO 2013011972 A1 WO2013011972 A1 WO 2013011972A1 JP 2012068056 W JP2012068056 W JP 2012068056W WO 2013011972 A1 WO2013011972 A1 WO 2013011972A1
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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
- H03L7/08—Details of the phase-locked loop
- H03L7/081—Details of the phase-locked loop provided with an additional controlled phase shifter
- H03L7/0812—Details of the phase-locked loop provided with an additional controlled phase shifter and where no voltage or current controlled oscillator is used
- H03L7/0816—Details of the phase-locked loop provided with an additional controlled phase shifter and where no voltage or current controlled oscillator is used the controlled phase shifter and the frequency- or phase-detection arrangement being connected to a common input
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
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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
- H03L7/08—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
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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
- H03L7/08—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
- H03L7/089—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses
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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
- H03L7/08—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
- H03L7/091—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector using a sampling device
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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
- H03L7/08—Details of the phase-locked loop
- H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K2005/00013—Delay, i.e. output pulse is delayed after input pulse and pulse length of output pulse is dependent on pulse length of input pulse
- H03K2005/00078—Fixed delay
- H03K2005/00097—Avoiding variations of delay using feedback, e.g. controlled by a PLL
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K2005/00013—Delay, i.e. output pulse is delayed after input pulse and pulse length of output pulse is dependent on pulse length of input pulse
- H03K2005/00078—Fixed delay
- H03K2005/00097—Avoiding variations of delay using feedback, e.g. controlled by a PLL
- H03K2005/00104—Avoiding variations of delay using feedback, e.g. controlled by a PLL using a reference signal, e.g. a reference clock
Definitions
- the present invention relates to a phase comparison device for comparing phases between two clocks and a DLL circuit using the phase comparison device.
- a phase comparator is widely used for phase comparison between input data and a clock.
- a typical phase comparator a Hogge type (see Non-Patent Document 1) that outputs a linear signal according to a phase difference between two input signals, and one input signal as the other input signal.
- an Alexander type (see Non-Patent Document 2) that outputs a binary signal by judging only whether the phase is advanced or delayed is well known.
- phase detection range is generally in the range from ⁇ to + ⁇ , and has a feature that the phase detection range turns back in a 2 ⁇ period.
- FIG. 10 is a configuration diagram when a phase comparator is used in the DLL circuit.
- This DLL circuit has a closed loop including a linear phase comparator 11A, a charge pump 20, a low-pass filter 30, and a variable delay buffer (VCDL) circuit 40.
- the phase of the rising edge of the externally input reference clock CLK1 matches the phase of the rising edge of the feedback clock CLK2 output from the variable delay buffer circuit 40, that is, the feedback clock CLK2 is one cycle (2 ⁇ from the reference clock CLK1).
- Negative feedback will be applied so that it will be delayed only.
- the variable delay buffer circuit 40 is composed of four stages of delay elements 41, 42, 43, and 44 connected in cascade and having the same characteristics, and a common current source 45 that supplies an operating current to each of the delay elements 41 to 44.
- a delay clock PH1 delayed by a quarter cycle from the reference clock CLK1 is obtained from the delay element 41 of the variable delay buffer circuit 40.
- the delay clock PH2 delayed by 2/4 period is obtained, and the delay clock PH3 delayed by 3/4 period is obtained from the delay element 43.
- the clock PH0 is the same clock as the reference clock CLK1
- the clock PH4 is the same clock as the feedback clock CLK2.
- the phase detection range of the reference clock CLK1 and the feedback clock CLK2, that is, the pull-in range as a DLL circuit is + ⁇ to ⁇ . If the delay amount of the variable delay buffer circuit 40 does not fall within the pull-in range, the DLL circuit does not operate.
- the variable delay buffer circuit 40 must have a minimum delay amount corresponding to at least ⁇ of the reference clock CLK1 in order to satisfy the restriction of ⁇ of the pull-in range. This must be built in as an absolute minimum delay amount on the hardware.
- variable delay buffer circuit 40 requires the absolute minimum delay amount T_mindelay, and the following conditional expression is obtained from the above expressions (1) and (2).
- An object of the present invention is to provide a phase comparator capable of expanding the phase detection range. Another object of the present invention is to provide a DLL circuit in which such a phase comparison device is applied and the operation cycle can be freely selected.
- a phase comparison apparatus includes a first clock and a second clock delayed by a delay amount D1 from the first clock at the same frequency as the first clock.
- a phase comparator for comparing a phase with a clock of the first frequency generator, wherein the first clock is input to generate a frequency-divided clock divided by N (N is a positive integer of 2 or more);
- An inverter for generating a divided inverted clock by inverting the phase of the divided clock, and the divided inverted clock at the same frequency as the first clock, and one cycle of the first clock being 2 ⁇ , the first
- the delay amount from each clock is 2 ⁇ at the maximum, and m (m is a positive integer greater than or equal to N ⁇ 1) delay clocks that increase within a range smaller than the delay amount D1.
- a second synchronization means for generating a final synchronization clock by synchronizing the synchronization clock with the second clock, and inputting the frequency-divided clock and the final synchronization clock to determine the phases of both.
- a phase comparator for comparison.
- the phase comparator compares phases of rising edges of the frequency-divided clock and the final synchronization clock.
- the peripheral clock has an “L” period of 2 ⁇ and an “H” period of 2 (N ⁇ 1) ⁇ , or the phase comparator establishes the rising edge of the divided clock and the final synchronization clock.
- the phase of the falling edge is compared, and the frequency-divided clock has an “H” period of 2 ⁇ and an “L” period of 2 (N ⁇ 1) ⁇ .
- the first synchronization means has a delay amount from the first clock.
- the synchronization clock is generated using the delay clock that is D2 (0 ⁇ D2 ⁇ 2 ⁇ and D1-2 ⁇ ⁇ D2).
- a DLL circuit controls the phase comparison device according to any one of the first to fourth aspects and the first clock based on a phase comparison result of the phase comparator.
- a variable delay buffer circuit that delays by a delay amount and outputs the second clock as the second clock.
- the variable delay buffer circuit is a plurality of delay buffers that are connected in cascade and whose delay amount is commonly controlled based on the phase comparator result.
- the m delay clocks are clocks extracted from the output side of each of the plurality of different delay buffers.
- the phase detection range can be extended beyond ⁇ to + ⁇ . Further, when applied to a DLL circuit, the operation cycle can be freely selected, and a broadband DLL circuit can be realized.
- FIG. 1 is a circuit diagram of a DLL circuit according to a first exemplary embodiment of the present invention.
- FIG. 4 is an operation waveform diagram when the phase of a feedback clock CLK2 is advanced with respect to a reference clock CLK1 in the DLL circuit of FIG.
- FIG. 2 is an operation waveform diagram when a reference clock CLK1 and a feedback clock CLK2 are in phase in the DLL circuit of FIG.
- FIG. 2 is an operation waveform diagram when the phase of a feedback clock CLK2 is delayed with respect to a reference clock CLK1 in the DLL circuit of FIG. It is a circuit diagram of the DLL circuit of the 2nd Example of this invention.
- FIG. 4 is an operation waveform diagram when the phase of a feedback clock CLK2 is advanced with respect to a reference clock CLK1 in the DLL circuit of FIG.
- FIG. 2 is an operation waveform diagram when a reference clock CLK1 and a feedback clock CLK2 are in phase in the DLL circuit of FIG.
- FIG. 2
- FIG. 6 is an operation waveform diagram when the phase of the feedback clock CLK2 is advanced with respect to the reference clock CLK1 in the DLL circuit of FIG.
- FIG. 6 is an operation waveform diagram when the reference clock CLK1 and the feedback clock CLK2 are in phase in the DLL circuit of FIG.
- FIG. 6 is an operation waveform diagram when the phase of the feedback clock CLK2 is delayed with respect to the reference clock CLK1 in the DLL circuit of FIG.
- It is an operational characteristic diagram of a normal phase comparator. It is a circuit diagram of a conventional DLL circuit. It is explanatory drawing of the absolute minimum delay amount of a variable delay buffer circuit. It is explanatory drawing of the absolute minimum delay amount of a variable delay buffer circuit.
- FIG. 1 shows a DLL circuit including the phase comparison device 10 of the first embodiment. The same components as those shown in FIG. In the DLL circuit of this embodiment, the phase comparator 11A described with reference to FIG.
- the divided clock CLK3 obtained by dividing the reference clock CLK1 by 2 is used as the input of the phase comparator 11. Therefore, if the reference clock CLK1 is used as a reference, the phase detection range is a range of ⁇ to + ⁇ . Over the range of ⁇ 2 ⁇ to + 2 ⁇ .
- the DFF circuit 14 constitutes a first synchronization means
- the DFF circuit 15 constitutes a second synchronization means.
- the feedback clock CLK2 since the clock input to the input terminal 11a of the phase comparator 11 is the divided clock CLK3, the feedback clock CLK2 must also be divided before being input to the input terminal 11b. However, if the feedback clock CLK2 is divided and input to the phase comparator 11, two frequency dividers for the reference clock and the feedback clock are required. At this time, when considering the combined state of the two frequency dividers, there are two states, a state in which the phase relationship is correct and a state shifted by ⁇ , which may cause erroneous locking. In addition, complicated control in consideration of jitter between the two frequency dividers is also required.
- the divided inverted clock CLK3B of the divided clock CLK3 is synchronized with the delay clock CLK4 output from the delay element 42 of the variable delay buffer circuit 40 to become the synchronized clock CLK5. Further, after being synchronized again with the feedback clock CLK2 to become the final synchronization clock CLK6, it is inputted to the feedback input terminal 11b of the phase comparator 11.
- the phase comparison is performed in a cycle one clock after the rising of the divided clock CLK3 while maintaining the phase information of the divided clock CLK3. Can do.
- the frequency-divided clock CLK3 is output in synchronization with the rising edge of the reference clock CLK1.
- the final synchronization clock CLK6 is output in synchronization with the rising edge of the feedback clock CLK2. That is, the phase information of the reference clock CLK1 and the feedback clock CLK2, which are the original clocks, is transmitted to the divided clock CLK3 and the final synchronization clock CLK6. Therefore, the phase comparison result between the frequency-divided clock CLK3 and the final synchronization clock CLK6 matches the phase comparison result between the reference clock CLK1 and the feedback clock CLK2, and phase adjustment with the same accuracy as the conventional phase comparator 11 is possible. It becomes.
- FIG. 2 shows an example when the phase of the feedback clock CLK2 is advanced with respect to the locked state
- FIG. 3 shows an example when the phase of the feedback clock CLK2 is delayed
- FIG. 4 shows an example when the phase of the feedback clock CLK2 is delayed. It is an example.
- the relationship between the rising edge of the delay clock CLK4 and the state of the divided clock CLK3 will be considered.
- the phase of the feedback clock CLK2 is between ⁇ 2 ⁇ and 0, assuming that the lock state is 0. Therefore, the value of the divided clock CLK3 at the rising time of the feedback clock CLK2 is “L”.
- the phase of the feedback clock CLK2 is between 0 and + 2 ⁇ when the lock state is 0. Therefore, the value of the divided clock CLK3 at the rising time of the feedback clock CLK2 is “H”.
- the frequency division inverted clock CLK3B is synchronized with the delay clock CLK4 at the intermediate node of the variable delay buffer circuit 40 to obtain the clock CLK5. Then, this is again synchronized with the feedback clock CLK2 to obtain the final synchronization clock CLK6, thereby preventing the above logic mismatch.
- the “H” period of the reference clock CLK1 is half of the period when the divided clock CLK3 is “H” as shown in FIGS. Therefore, in order to sample “H” of the divided inverted clock CLK3B, the delayed clock CLK4 may be used.
- the delay clock uses (division number-1) (PH2), but it may be configured using more than (division number-1).
- the range that each stage of the delay clock can take is not necessarily equal, and the range that each stage can take may be set freely. Even in such a case, the phase range that can be taken per stage of the delayed clock is always less than 2 ⁇ .
- the phase detection range of the feedback clock CLK2 is expanded to a range of ⁇ 2 ⁇ to + 2 ⁇ .
- the delay amount from the reference clock CLK1 is smaller than the delay amount of the feedback clock CLK2, and a delay clock having an edge between the edge of the reference clock CLK1 and the edge of the feedback clock CLK2 may be used. Is possible. Thereby, it is possible to obtain a phase detection range exceeding at least the conventional ⁇ to + ⁇ .
- the range of the delay amount of the delay clock useful for expanding the phase detection range will be considered.
- the delay amount of the delay clock CLK4 from the reference clock CLK1 is D2
- the delay amount (denoted as D1) of the feedback clock CLK2 from the reference clock CLK1 is less than 2 ⁇ which is the locked state, if 0 ⁇ D2 ⁇ D1, 0 ⁇ The condition of D2 ⁇ 2 ⁇ is satisfied.
- the condition of D2 ⁇ 2 ⁇ cannot be satisfied.
- the phase detection range is approximately ⁇ 2 ⁇ to + 2 ⁇ .
- (A) Condition having a phase detection range before and after the locked state 0 ⁇ D2 ⁇ 2 ⁇ and D2 ⁇ D1 and (D1-2 ⁇ ) ⁇ D2 (B) A condition having a phase detection range equal to or greater than that of the conventional one on the + side (A) and (1/3) D1 ⁇ D2 ⁇ (2/3) D1 (C) Conditions having a phase detection range of approximately ⁇ 2 ⁇ to + 2 ⁇ (A) and D2 0.5D1.
- phase comparator 11 that compares the phases of the rising edges of the two clocks input to the input terminals 11a and 11b is used, and sampling is performed at the rising edge of the clock signal input to the clock terminal. Synchronization was performed using the DFFs 14 and 15 to be performed. However, it is possible to use a phase comparator that compares the phases of the falling edges, and it is also possible to synchronize with a DFF that performs sampling at the falling edge of the clock signal.
- a desired phase detection range may not be obtained due to various variations. Therefore, in order to increase the operation margin, it is possible to adopt a configuration in which synchronization is performed in more stages. That is, in the configuration of FIG. 1, only one delay clock CLK4 is used to synchronize the frequency division inverted clock CLK3B. It is also possible to synchronize the frequency division inverted clock CLK3B by sequentially synchronizing with a plurality of delay clocks that are sequentially increased by 2 ⁇ . Also in this case, the delay amounts of the plurality of delay clocks are set in a range less than D1. In other words, the delay amount of the delay clock used for the last synchronization to generate the synchronization clock CLK5 is less than D1.
- the range of possible delay times for each of the multiple delay clocks varies depending on the number of delay clocks and the required phase detection range. However, it can be specified by performing the same consideration as the above consideration when the number of delay clocks is one. Alternatively, it is also possible to generate a plurality of delay clocks by simply dividing the reference clock CLK1 and the feedback clock CLK2 approximately equally.
- D21 (1/3) D1
- D22 (2 / 3) It can be D1.
- D21 (1/3) D1
- D22 (2 / 3) It can be D1.
- FIG. 5 shows a DLL circuit that includes the phase comparison device 50 of the second embodiment and extends the phase detection range of the feedback clock CLK12 to the range of ⁇ 2 ⁇ to + 2 ⁇ . 6 to 8 show operation waveforms of the DLL circuit.
- the phase comparator 51 compares the phases of the rising edges of the clocks input to the two input terminals 51a and 51b.
- the divide-by-3 circuit 52 generates the clock CLK13 whose “L” period is 2 ⁇ and whose “H” period is 4 ⁇ .
- the “H” period is 2 ⁇ as the frequency divider 52.
- a clock that generates the clock CLK13 having an “L” period of 4 ⁇ is used.
- the range of delay amount allowed for each delay clock can be determined by performing the same consideration as in the embodiment of FIG.
- a plurality of delayed clocks can be generated by simply dividing the reference clock CLK11 and the feedback clock CLK12 roughly equally.
- the delay amount of the feedback clock CLK12 from the reference clock CLK11 is D1
- the delay amount of the first delay clock from the reference clock CLK11 is D21
- the reference clock is divided by N (period N times). Input to one input terminal of the phase comparator. Then, the divided inverted clock obtained by inverting the N divided clock is synchronized N ⁇ 1 times with N ⁇ 1 delay clocks whose delay amount is sequentially increased by 2 ⁇ at the maximum, and is synchronized with the feedback clock. Thus, the final synchronization clock may be input to the other input terminal of the phase comparator.
Abstract
Description
T_CLK1 ≦ 2×T_mindelay ・・・(1)
T_CLK1 ≧ T_mindelay ・・・(2)
T_mindelay ≦ T_CLK1 ≦ 2×T_mindelay ・・・(3)
すなわち、本構成に従ってDLL回路を構成しようとすると、参照クロックCLK1の位相検出範囲が絶対最小遅延量T_mindelayの2倍の範囲に制約される。そして、2倍を超える広帯域のDLL回路を構成することができないという問題があった。
請求項2にかかる発明は、請求項1に記載の位相比較装置において、前記位相比較器が、前記分周クロックと前記最終同期化クロックとの立ち上がりエッジの位相を比較するものであり、前記分周クロックが、2πの“L”の期間と2(N-1)πの“H”期間とを有するか、もしくは、前記位相比較器が、前記分周クロックと前記最終同期化クロックとの立下がりエッジの位相を比較するものであり、前記分周クロックが、2πの“H”期間と2(N-1)πの“L”期間とを有することを特徴とする。
請求項3にかかる発明は、請求項1又は2に記載の位相比較装置において、N=2,m=1であり、前記第1の同期化手段が、前記第1のクロックからの遅延量がD2(0<D2<2π、且つ、D1-2π<D2)である前記遅延クロックを利用して前記同期化クロックを生成することを特徴とする。
請求項4にかかる発明は、請求項3に記載の位相比較装置において、前記遅延クロックの遅延量D2がD2=0.5D1であることを特徴とする。
請求項5にかかる発明のDLL回路は、請求項1乃至4のいずれか1つに記載の位相比較装置と、前記第1のクロックを、前記位相比較器の位相比較結果に基づいて制御される遅延量だけ遅延させ、前記第2のクロックとして出力する可変遅延バッファ回路と、を具備することを特徴とする。
請求項6にかかる発明は、請求項5に記載のDLL回路において、前記可変遅延バッファ回路は、縦続接続され且つ前記位相比較器結果に基づいて遅延量が共通に制御される複数の遅延バッファで構成され、前記m個の遅延クロックは、前記複数の異なる遅延バッファの各々の出力側から取り出されたクロックであることを特徴とする。
請求項7にかかる発明は、請求項5又は6に記載のDLL回路において、前記位相比較器は、D1=2πのときに前記可変遅延バッファ回路の遅延量を維持する前記位相比較結果を出力することを特徴とする。
図1に第1の本実施例の位相比較装置10を備えたDLL回路を示す。図10に示したものと同じものには、同じ符号をつけた。本実施例のDLL回路では、図10で説明した位相比較器11Aを位相比較装置10に置き換えている。
(A)ロック状態の前後に位相検出範囲をもつ条件
0<D2<2π 且つ D2<D1 且つ (D1-2π)<D2
(B)+側に従来と同等以上の位相検出範囲を持つ条件
(A) 且つ (1/3)D1<D2<(2/3)D1
(C)ほぼ-2π~+2πの位相検出範囲を持つ条件
(A) 且つ D2=0.5D1となる。
図5に第2の実施例の位相比較装置50を備え、帰還クロックCLK12の位相検出範囲を-2π~+2πの範囲に拡張するためのDLL回路を示す。また、図6~図8に、そのDLL回路の動作波形を示す。
更に、帰還クロックの位相検出範囲を-2π~+2(N-1)πの範囲(Nは2以上の正の整数)に拡張するためには、参照クロックをN分周(N倍周期)して位相比較器の一方の入力端子に入力させる。そして、そのN分周クロックを反転させた分周反転クロックを、遅延量が最大で2πずつ順次大きくなるN-1個の遅延クロックでN-1回同期化し、帰還クロックで同期化する。これにより、最終同期化クロックとしてから位相比較器の他方の入力端子に入力させれば良い。
20:チャージポンプ
30:ローパスフィルタ
40:可変遅延バッファ回路、41~44:遅延素子、45:電流源
50:位相比較装置、51:位相比較器、52:3分周器、53:インバータ、54~56:DFF回路
Claims (7)
- 第1のクロックと、該第1のクロックと同一周波数で、該第1のクロックから遅延量D1だけ遅延した第2のクロックとの位相を比較する位相比較装置であって、
前記第1のクロックを入力してN分周(Nは2以上の正の整数)した分周クロックを生成する分周器と、
前記分周クロックを位相反転させて分周反転クロックを生成するインバータと、
前記分周反転クロックを、前記第1のクロックと同一周波数で、前記第1のクロックの1周期を2πとして、前記第1のクロックからの遅延量が、最大で2πずつ、前記遅延量D1より小さい範囲内で大きくなるm(mはN-1以上の正の整数)個の遅延クロックで、順次同期化して、同期化クロックを生成する第1の同期化手段と、
前記同期化クロックを前記第2のクロックで同期化して最終同期化クロックを生成する第2の同期化手段と、
前記分周クロックと前記最終同期化クロックを入力して両者の位相を比較する位相比較器と、
を具備することを特徴とする位相比較装置。 - 請求項1に記載の位相比較装置において、
前記位相比較器が、前記分周クロックと前記最終同期化クロックとの立ち上がりエッジの位相を比較するものであり、前記分周クロックが、2πの“L”の期間と2(N-1)πの“H”期間とを有するか、もしくは、
前記位相比較器が、前記分周クロックと前記最終同期化クロックとの立下がりエッジの位相を比較するものであり、前記分周クロックが、2πの“H”期間と2(N-1)πの“L”期間とを有することを特徴とする位相比較装置。 - 請求項1又は2に記載の位相比較装置において、
N=2,m=1であり、
前記第1の同期化手段が、前記第1のクロックからの遅延量がD2(0<D2<2π、且つ、D1-2π<D2)である前記遅延クロックを利用して前記同期化クロックを生成することを特徴とする位相比較装置。 - 請求項3に記載の位相比較装置において、
前記遅延クロックの遅延量D2がD2=0.5D1であることを特徴とする位相比較装置。 - 請求項1乃至4のいずれか1つに記載の位相比較装置と、
前記第1のクロックを、前記位相比較器の位相比較結果に基づいて制御される遅延量だけ遅延させ、前記第2のクロックとして出力する可変遅延バッファ回路と、
を具備することを特徴とするDLL回路。 - 請求項5に記載のDLL回路において、
前記可変遅延バッファ回路は、縦続接続され且つ前記位相比較器結果に基づいて遅延量が共通に制御される複数の遅延バッファで構成され、前記m個の遅延クロックは、前記複数の異なる遅延バッファの各々の出力側から取り出されたクロックであることを特徴とするDLL回路。 - 請求項5又は6に記載のDLL回路において、
前記位相比較器は、D1=2πのときに前記可変遅延バッファ回路の遅延量を維持する前記位相比較結果を出力することを特徴とするDLL回路。
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US14/232,371 US8847641B2 (en) | 2011-07-19 | 2012-07-17 | Phase comparison device and DLL circuit |
JP2013524718A JP5807065B2 (ja) | 2011-07-19 | 2012-07-17 | 位相比較装置およびdll回路 |
CN201280035509.9A CN103828236B (zh) | 2011-07-19 | 2012-07-17 | 相位比较装置以及dll电路 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015136012A (ja) * | 2014-01-16 | 2015-07-27 | 富士通株式会社 | タイミング調整回路、クロック生成回路、及びタイミング調整方法 |
CN104954009A (zh) * | 2014-03-27 | 2015-09-30 | 爱思开海力士有限公司 | 用于半导体装置的输出控制电路和包括其的输出驱动电路 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6242228B2 (ja) * | 2014-02-05 | 2017-12-06 | 株式会社メガチップス | クロック生成方法およびクロック生成回路 |
TWI559723B (zh) * | 2014-08-11 | 2016-11-21 | 聯詠科技股份有限公司 | 時脈資料回復裝置 |
CN105629289B (zh) * | 2015-12-29 | 2019-04-02 | 深圳大学 | 用于飞行时间测量系统的重合信号产生方法和系统 |
CN105680869A (zh) * | 2016-01-29 | 2016-06-15 | 成都科创谷科技有限公司 | 一种基于瞬时电压抑制的缓冲串行电路 |
US11023176B2 (en) | 2017-04-14 | 2021-06-01 | Huawei Technologies Co., Ltd. | Storage interface, timing control method, and storage system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5364570A (en) * | 1976-11-19 | 1978-06-09 | Mitsubishi Electric Corp | Phase comparator |
JPH02141121A (ja) * | 1988-11-22 | 1990-05-30 | Mitsubishi Electric Corp | 遅延回路及び遅延装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3388134B2 (ja) * | 1997-04-10 | 2003-03-17 | 富士通株式会社 | 位相比較回路、dll回路および半導体集積回路 |
JP4071873B2 (ja) * | 1998-09-24 | 2008-04-02 | 富士通株式会社 | 半導体集積回路装置 |
JP4190662B2 (ja) * | 1999-06-18 | 2008-12-03 | エルピーダメモリ株式会社 | 半導体装置及びタイミング制御回路 |
US6587811B2 (en) * | 2000-11-28 | 2003-07-01 | Scientific Technologies Incorporated | System and method for delay line testing |
KR100484252B1 (ko) * | 2002-11-27 | 2005-04-22 | 주식회사 하이닉스반도체 | 지연 고정 루프 회로 |
JP4133484B2 (ja) * | 2003-03-19 | 2008-08-13 | 三菱電機株式会社 | 位相比較器 |
KR100543910B1 (ko) * | 2003-05-30 | 2006-01-23 | 주식회사 하이닉스반도체 | 디지털 지연고정루프 및 그의 제어 방법 |
JPWO2005050844A1 (ja) * | 2003-11-20 | 2007-06-14 | 株式会社アドバンテスト | 可変遅延回路 |
JP2005328109A (ja) * | 2004-05-12 | 2005-11-24 | Thine Electronics Inc | 等位相多相クロック信号発生回路およびそれを用いたシリアルディジタルデータ受信回路 |
KR100641360B1 (ko) * | 2004-11-08 | 2006-11-01 | 삼성전자주식회사 | 지연 동기 루프 및 이를 구비한 반도체 메모리 장치 |
JP4754578B2 (ja) * | 2005-11-22 | 2011-08-24 | パナソニック株式会社 | 位相比較器及び位相調整回路 |
US8032778B2 (en) * | 2008-03-19 | 2011-10-04 | Micron Technology, Inc. | Clock distribution apparatus, systems, and methods |
JP2010146725A (ja) * | 2010-02-03 | 2010-07-01 | Renesas Technology Corp | ダイナミック型半導体記憶装置 |
-
2012
- 2012-07-17 US US14/232,371 patent/US8847641B2/en not_active Expired - Fee Related
- 2012-07-17 WO PCT/JP2012/068056 patent/WO2013011972A1/ja active Application Filing
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5364570A (en) * | 1976-11-19 | 1978-06-09 | Mitsubishi Electric Corp | Phase comparator |
JPH02141121A (ja) * | 1988-11-22 | 1990-05-30 | Mitsubishi Electric Corp | 遅延回路及び遅延装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015136012A (ja) * | 2014-01-16 | 2015-07-27 | 富士通株式会社 | タイミング調整回路、クロック生成回路、及びタイミング調整方法 |
CN104954009A (zh) * | 2014-03-27 | 2015-09-30 | 爱思开海力士有限公司 | 用于半导体装置的输出控制电路和包括其的输出驱动电路 |
CN104954009B (zh) * | 2014-03-27 | 2019-05-31 | 爱思开海力士有限公司 | 用于半导体装置的输出控制电路和包括其的输出驱动电路 |
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US20140167820A1 (en) | 2014-06-19 |
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