WO2006038468A1 - 位相差測定回路 - Google Patents
位相差測定回路 Download PDFInfo
- Publication number
- WO2006038468A1 WO2006038468A1 PCT/JP2005/017415 JP2005017415W WO2006038468A1 WO 2006038468 A1 WO2006038468 A1 WO 2006038468A1 JP 2005017415 W JP2005017415 W JP 2005017415W WO 2006038468 A1 WO2006038468 A1 WO 2006038468A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- phase difference
- delay
- signal
- input signal
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
Definitions
- the present invention relates to a phase difference measurement circuit that measures a phase difference between two signals.
- a phase difference determination circuit which is a conventional circuit for measuring a phase difference with a high-speed pulse signal, will be described with reference to FIG. 19 and FIG.
- FIG. 19 is a diagram illustrating a configuration of a phase difference determination circuit using a high-speed pulse signal
- FIG. 20 is a waveform diagram of a signal output from each circuit.
- the phase difference discriminating circuit includes the waveform shaping circuits 152a and 152b that perform waveform shaping of the input signals 151a and 151b, and the exclusive waveform that generates the pulse waveform S5 indicating the phase difference between the input signals.
- An OR circuit 153, a first counter 154 that counts the pulse waveform indicating the phase difference only for a predetermined period tl, and a high-speed pulse signal generator 155 for counting the signal are used for switching the predetermined period tl. It comprises a switch 156, a second counter 157 that counts the output S9 from the first counter 154 for a predetermined period t2, and an RS flip-flop 158 that outputs the detection result of the phase difference.
- the outputs Q1 to Q4 of the first counter have different tl periods, and the outputs Q4 to Q6 of the second counter have different t2 periods, respectively.
- the desired period is selected.
- the waveform shaping circuits 152a and 152b receive the signals S1 and S2 that are the two input signals 151a and 151b, respectively, and generate rectangular wave signals S3 and S4, The input signals S3 and S4 that have been subjected to waveform shaping are generated by the exclusive OR circuit 153 in accordance with their phase difference. Then, the first counter 154 measures the phase difference pulse, and when the phase difference pulse exceeds a predetermined count value tl, the second counter The output signal S9 output to 157 and the RS flip-flop circuit 158 becomes “1”.
- the second counter 157 is reset by the signal S9, counts the high-speed pulse signal S8, and when the predetermined count value t2 is exceeded, the output signal S10 output to the RS flip-flop 158 becomes “1”.
- the RS flip-flop 158 is set when the output signal S11 becomes “1” when S9 input to the set terminal S becomes “1”, and when the signal S10 input to the reset terminal R becomes “1”. It is reset when the output signal S11 becomes “0”.
- Patent Document 1 Japanese Patent No. 2783543 (Page 4, Figures 1 and 2)
- the pulse width representing the phase difference becomes small, if it is to be measured with high accuracy, the width is sufficiently narrower than the target pulse width, that is, an
- a high-speed pulse signal is necessary. This does not depend on the frequency of the signal to be measured, but only depends on the required phase difference resolution. As a result, if the resolution is to be increased, a higher-speed pulse signal is naturally required to be faster.
- the present invention solves the above-described conventional problems, and an object thereof is to provide a phase difference measurement circuit that can accurately measure any phase difference without requiring a high-speed pulse signal. .
- a phase difference measurement circuit is a phase difference measurement circuit that measures a phase difference between two input signals.
- a waveform control circuit that outputs one input signal at regular intervals, and a phase difference between one input signal and the other input signal output at regular intervals by the waveform control circuit at a predetermined timing
- the pulse width is converted every time, and the comparison pulse generation circuit that outputs the converted pulse width and the phase difference converted into the pulse width are accumulated, and the periodic signal is generated based on the accumulated phase difference.
- a periodic signal generation circuit for measuring the period of the periodic signal. Measuring circuit to be determined.
- the phase difference measuring circuit according to claim 2 of the present invention is a phase difference measuring circuit for measuring a phase difference between two input signals, and the level of one input signal of the two input signals.
- a phase shift circuit that shifts the phase by ⁇ ⁇ ( ⁇ is a natural number), and a phase difference between one input signal shifted by ⁇ ⁇ by the phase shift circuit and the other input signal for each predetermined timing.
- a comparison pulse generation circuit that converts to a pulse width and outputs the converted pulse width, and accumulates the phase difference converted to the pulse width, and generates a periodic signal based on the accumulated phase difference! / And a measuring circuit for measuring the period of the periodic signal.
- the phase difference measurement circuit according to claim 3 of the present invention is the phase difference measurement circuit according to claim 1 or 2, wherein the periodic signal generation circuit is driven by an output from the comparison pulse generation circuit.
- a charge pump circuit that outputs electric charge, a capacitor that accumulates output charge of the charge pump circuit, and a reset pulse generator that generates a reset pulse indicating that the accumulated voltage of the capacitor exceeds an arbitrary reference voltage It is equipped with.
- phase difference measuring circuit according to claim 4 of the present invention is the phase difference measuring circuit according to claim 3, wherein the charge pump circuit is responsive to the output pulse width of the comparison pulse generating circuit. This controls the amount of output charge.
- phase difference measurement circuit is the phase difference measurement circuit according to claim 3, wherein the measurement circuit counts the period of the reset pulse with an arbitrary clock, The reset pulse period is converted into a digital numerical value and output.
- the phase difference measurement circuit is a phase difference measurement method for measuring a phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount.
- a measurement circuit, a delay circuit for delaying the input signal by a predetermined delay amount, a waveform control circuit for outputting the delayed signal at a constant period, and a constant by the input signal and the waveform control circuit The phase difference from the signal output every period is converted into a pulse width at every predetermined timing, the comparison pulse generation circuit that outputs the converted pulse width, and the phase difference converted into the pulse width are accumulated.
- a periodic signal generating circuit for generating a periodic signal based on the accumulated phase difference, and a measuring circuit for measuring the period of the periodic signal. It is a thing.
- the phase difference measuring circuit according to claim 7 of the present invention is a phase difference measuring the phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount.
- a delay circuit that delays the input signal by a predetermined delay amount; a phase shift circuit that shifts the phase of the signal delayed by the delay circuit by ⁇ ⁇ ( ⁇ is a natural number); and the input signal.
- the apparatus includes a periodic signal generation circuit that accumulates the converted phase difference and generates a periodic signal based on the accumulated phase difference, and a measurement circuit that measures the period of the periodic signal.
- the phase difference measuring circuit according to claim 8 of the present invention is a phase difference measuring a phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount.
- a measurement circuit that delays the input signal by a predetermined delay amount and further delays the phase of the delayed signal by ⁇ ⁇ ( ⁇ is a natural number); the input signal and the delay circuit;
- the phase difference from the signal output from the signal is converted into a pulse width at every predetermined timing, the comparison pulse generation circuit that outputs the converted pulse width, and the phase difference converted into the pulse width are accumulated, and the accumulated
- a periodic signal generating circuit for generating a periodic signal based on the phase difference and a measuring circuit for measuring the period of the periodic signal.
- the phase difference measurement circuit according to claim 9 of the present invention is the phase difference measurement circuit according to any one of claims 6 to 8, wherein a delay control circuit for controlling a delay amount of the delay circuit is provided. And the delay circuit generates two or more signals having different delay amounts from the input signal based on the control of the delay control circuit.
- phase difference measuring circuit according to claim 10 of the present invention is the phase difference measuring circuit according to claim 9, wherein the delay control circuit delays the delay circuit at predetermined time intervals. The amount of extension is changed.
- phase difference measuring circuit according to claim 11 of the present invention is the phase difference measuring circuit according to claim 9, wherein the delay control circuit delays the delay circuit at predetermined time intervals. Control is performed to increase the amount of monotonous increase or decrease monotonously.
- phase difference measurement circuit is the phase difference measurement circuit according to any one of claims 6 to 8, wherein the periodic signal generation circuit is connected to the comparison pulse generation circuit.
- a charge pump circuit that drives according to the output and outputs charge, a capacity for storing the output charge of the charge pump circuit, and a reset pulse indicating that the stored voltage of the capacity has exceeded an arbitrary reference voltage.
- a reset pulse generation unit for generating.
- phase difference measuring circuit according to claim 13 of the present invention is the phase difference measuring circuit according to claim 12, wherein the charge pump circuit has a pulse width output from the comparison pulse generating circuit. Accordingly, the amount of output charge is controlled.
- phase difference measurement circuit according to claim 14 of the present invention is the phase difference measurement circuit according to claim 12, wherein the measurement circuit powers the period of the reset pulse with an arbitrary clock.
- the reset pulse period is converted into a digital numerical value and output.
- the phase difference measuring circuit according to claim 15 of the present invention is a phase measuring circuit for measuring a phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount.
- the phase difference from the signal output at a certain period in step 1 is converted into a pulse width at a predetermined timing, and the converted pulse width is output, and the converted pulse width is converted into the pulse width.
- the measurement circuit Based on the measurement results obtained by accumulating the phase difference and generating a periodic signal based on the accumulated phase difference, the measurement circuit for measuring the period of the periodic signal, and the measurement result of the measurement circuit. Generate statistical information of phase difference within a specified period It is obtained by a statistical circuit.
- the phase difference measurement circuit according to claim 16 of the present invention is a phase measurement circuit that measures a phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount.
- a delay measuring circuit for delaying the input signal by a predetermined delay amount; a phase shift circuit for shifting the phase of the signal delayed by the delay circuit by ⁇ ⁇ ( ⁇ is a natural number); Phase difference between the input signal and the signal shifted by ⁇ in the phase shift circuit Is converted into a pulse width at each predetermined timing, and the comparison pulse generation circuit for outputting the converted pulse width is accumulated, and the phase difference converted into the pulse width is accumulated, and based on the accumulated phase difference,
- a periodic signal generating circuit for generating a periodic signal, a measuring circuit for measuring the period of the periodic signal, and a statistical circuit for generating statistical information of phase difference within a predetermined period based on a measurement result by the measuring circuit. It is provided.
- the phase difference measurement circuit according to claim 17 of the present invention is a phase measurement circuit that measures a phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount.
- a delay measuring circuit that delays the input signal by a predetermined delay amount and further delays the phase of the delayed signal by ⁇ ( ⁇ is a natural number); and the input signal and the delay Circuit force
- the phase difference from the output signal is converted into a pulse width at every predetermined timing, the comparison pulse generation circuit that outputs the converted pulse width, and the phase difference converted into the pulse width are accumulated, Based on the accumulated phase difference, a periodic signal generation circuit that generates a periodic signal, a measurement circuit that measures the period of the periodic signal, and a statistical value of the phase difference within a predetermined period based on the measurement result of the measurement circuit Information generation It is obtained by a circuit.
- phase difference measurement circuit according to Claim 18 of the present invention is the phase difference measurement circuit according to any one of Claims 15 to 17, wherein the measurement circuit includes at least two registers for holding measurement values. And the statistical circuit generates statistical information based on the information stored in the register.
- the phase difference measurement circuit according to claim 19 of the present invention has the delay control for controlling the delay amount of the delay circuit in addition to the phase difference measurement circuit according to any one of claims 15 to 17.
- the delay circuit Provided with a circuit, and the delay circuit generates two or more signals having different input signal power delay amounts based on the control of the delay control circuit.
- phase difference measuring circuit according to claim 20 of the present invention is the phase difference measuring circuit according to claim 19, wherein the delay control circuit is configured to delay the delay circuit at predetermined time intervals. The amount of extension is changed.
- phase difference measurement circuit according to claim 21 of the present invention is the phase difference measurement circuit according to claim 19, wherein the delay control circuit is configured to delay the delay circuit at predetermined time intervals. Control is performed to increase the amount of monotonous increase or decrease monotonously.
- the phase difference measurement circuit according to Claim 22 of the present invention is the phase difference measurement circuit according to any one of Claims 15 to 17, wherein the periodic signal generation circuit is connected to the comparison pulse generation circuit. Generates a charge pump circuit that outputs electric charge according to the output of the capacitor, a capacitor that accumulates the output charge of the charge pump circuit, and a reset pulse that indicates that the accumulated voltage of the capacitor exceeds an arbitrary reference voltage And a reset pulse generation unit for performing the above-described operation.
- phase difference measurement circuit according to claim 23 of the present invention is the phase difference measurement circuit according to claim 22, wherein the charge pump circuit has a pulse width output from the comparison pulse generation circuit. Accordingly, the amount of output charge is controlled.
- phase difference measurement circuit according to Claim 24 of the present invention is the phase difference measurement circuit according to Claim 22, wherein the measurement circuit powers the cycle of the reset pulse with an arbitrary clock.
- the reset pulse period is converted into a digital numerical value and output.
- phase difference measuring circuit in the phase difference measuring circuit for measuring the phase difference between the two input signals, one of the two input signals is regarded as one.
- the waveform control circuit that outputs every fixed period, and the phase difference between one input signal and the other input signal that are output every fixed period by the waveform control circuit at each predetermined timing
- a comparison pulse generation circuit for outputting the converted pulse width and a periodic signal for accumulating the phase difference converted into the pulse width and generating a periodic signal based on the accumulated phase difference! Since the generator circuit and the measurement circuit that measures the period of the periodic signal are provided, even when the phase difference is small, it is possible to measure accurately without using high-speed pulses. Since there is no need for accuracy, the circuit configuration There is an effect that can be easily done.
- phase difference measurement circuit of claim 2 of the present invention in the phase difference measurement circuit that measures the phase difference between the two input signals, one of the two input signals is the input signal.
- a phase shift circuit that shifts the phase of the input signal by ⁇ ⁇ (where ⁇ is a natural number) and a phase difference between one input signal shifted by ⁇ ⁇ by the phase shift circuit and the other input signal.
- the pulse width is converted at each timing, the comparison pulse generation circuit that outputs the converted pulse width, and the phase difference converted to the pulse width are accumulated, and a period signal is generated based on the accumulated phase difference.
- Periodic signal generation circuit and a measurement circuit that measures the period of the periodic signal so even if the phase difference is small, it can be measured accurately without using high-speed pulses, and the circuit itself can be sped up. Since there is no need to increase the accuracy, the circuit configuration can be facilitated.
- the periodic signal generating circuit is an output of the comparison pulse generating circuit.
- a charge pump circuit that outputs electric charges, a capacitor that accumulates output charges of the charge pump circuit, and a reset pulse generator that generates a reset pulse indicating that the accumulated voltage of the capacitor exceeds an arbitrary reference voltage Therefore, even with a minute phase difference, the phase difference is converted into a charge amount and stored, so that the phase difference can be accurately measured without the need for a high-speed pulse signal. is there.
- the charge pump circuit has a pulse width output from the comparison pulse generating circuit. Since the output charge amount is controlled according to the phase difference, the charge amount corresponding to the phase difference can be output even with a minute phase difference, and the phase difference can be accurately measured without requiring a high-speed pulse signal. There is an effect that can.
- the measuring circuit counts the period of the reset pulse with an arbitrary clock. Since the reset pulse period is converted to a digital value and output, a minute phase difference between two analog input signals can be obtained as a digital value without requiring a high-speed pulse signal. There is an effect that the phase difference can be accurately measured.
- the phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount is measured.
- a phase difference measurement circuit that delays the input signal by a predetermined delay amount; a waveform control circuit that outputs the delayed signal at a constant period; and the input signal
- a comparison pulse generation circuit that converts a phase difference between a signal output at a predetermined cycle by the waveform control circuit into a pulse width at a predetermined timing, and outputs the converted pulse width; and the pulse width
- a period signal generation circuit for accumulating the phase difference converted to, and generating a periodic signal based on the accumulated phase difference, and a measurement circuit for measuring the period of the periodic signal.
- phase difference measuring circuit of claim 7 of the present invention the phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount is measured.
- a phase difference measurement circuit that delays the input signal by a predetermined delay amount; and a phase shift circuit that shifts the phase of the signal delayed by the delay circuit by ⁇ ⁇ ( ⁇ is a natural number).
- a comparison pulse generating circuit that converts a phase difference between the input signal and the signal shifted by ⁇ by the phase shift circuit into a pulse width at every predetermined timing, and outputs the converted pulse width; Since the phase difference converted into the pulse width is accumulated, and based on the accumulated phase difference, a periodic signal generation circuit that generates a periodic signal and a measurement circuit that measures the period of the periodic signal are provided.
- the phase difference caused by the delay circuit By sure, it is possible to check whether delay amount set is delayed successfully, the delay circuit a predetermined amount of delay can be set there is an effect that it is possible to perform the determination of whether the normal operation.
- phase difference measuring circuit of claim 8 of the present invention the phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount is measured.
- a phase difference measurement circuit that delays the input signal by a predetermined delay amount and further delays the phase of the delayed signal by ⁇ ⁇ ( ⁇ is a natural number); the input signal and the phase difference measurement circuit;
- Delay circuit power A phase difference from the output signal is converted into a pulse width at each predetermined timing, and the comparison pulse generation circuit that outputs the converted pulse width and the phase difference converted into the pulse width are accumulated.
- the phase difference generated by the delay circuit is provided.
- a delay control circuit for controlling a delay amount of the delay circuit
- the delay circuit generates two or more signals having different input signal power delay amounts based on the control of the delay control circuit, so that the set two or more delay amounts are normally delayed. There is an effect that it is possible to confirm whether or not a delay circuit that can set two or more different delay amounts is operating normally.
- the delay control circuit includes the delay circuit of the delay circuit at predetermined time intervals. Since the delay amount is changed, it is possible to check at each time interval whether two or more set delay amounts are normally delayed, and the delay circuit that can set two or more different delay amounts operates normally. There is an effect that it can be determined whether or not.
- the delay control circuit includes the delay circuit of the delay circuit at predetermined time intervals. Since control is performed to increase or decrease the delay amount monotonously, it is possible to check whether the set delay amount is normally delayed step by step or not. It is possible to determine whether or not a delay circuit that can set different delay amounts operates normally.
- the periodic signal generating circuit includes the comparison pulse.
- a charge pump circuit that is driven in accordance with an output from a power generation circuit and outputs charges, a capacity for storing output charges of the charge pump circuit, and an accumulated voltage of the capacity exceeding an arbitrary reference voltage Since it has a reset pulse generator that generates a reset pulse, a high-speed pulse signal is required by converting the phase difference into an amount of charge and accumulating it even for the phase difference generated by a small delay amount. There is an effect that the phase difference can be measured accurately without any problem.
- the level of claim 12 In the phase difference measurement circuit the charge pump circuit controls the amount of output charge according to the pulse width output from the comparison pulse generation circuit, so even in the phase difference generated by a small delay amount, the phase difference It is possible to output the amount of charge corresponding to, and to measure the phase difference accurately without requiring a high-speed pulse signal.
- the measuring circuit counts the period of the reset pulse with an arbitrary clock. Since the reset pulse period is converted into a digital value and output, the phase difference generated by a small delay amount can be obtained as a digital value, and the accuracy can be obtained without requiring a high-speed pulse signal. There is an effect that the phase difference can be measured well.
- phase difference measuring circuit of claim 15 of the present invention the phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount is measured.
- a phase difference measuring circuit for delaying the input signal by a predetermined delay amount, a waveform control circuit for outputting the delayed signal at a constant period, the input signal and the waveform The control circuit converts the phase difference from the signal output at regular intervals into a pulse width for each predetermined timing, and outputs the converted pulse width to the comparison pulse generation circuit and the pulse width.
- the converted phase difference is accumulated, and a periodic signal generation circuit that generates a periodic signal based on the accumulated phase difference, a measurement circuit that measures the period of the periodic signal, and a measurement result by the measurement circuit , Statistical information of phase difference within a given period
- a periodic signal generation circuit that generates a periodic signal based on the accumulated phase difference
- a measurement circuit that measures the period of the periodic signal
- a measurement result by the measurement circuit Statistical information of phase difference within a given period
- the phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount is measured.
- a phase difference measuring circuit for delaying the input signal by a predetermined delay amount, and a phase shift circuit for shifting the phase of the signal delayed by the delay circuit by ⁇ ⁇ ( ⁇ is a natural number) A ratio of converting the phase difference between the input signal and the signal shifted by ⁇ by the phase shift circuit into a pulse width at every predetermined timing and outputting the converted pulse width
- the phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount is measured.
- a phase difference measuring circuit that delays the input signal by a predetermined delay amount and further delays the phase of the delayed signal by ⁇ ( ⁇ is a natural number); and the input signal
- ⁇ is a natural number
- a phase difference from the signal output from the delay circuit is converted into a pulse width at every predetermined timing, a comparison pulse generation circuit that outputs the converted pulse width, and a phase difference converted into the pulse width is accumulated.
- a periodic signal generating circuit for generating a periodic signal
- a measuring circuit for measuring the period of the periodic signal
- a predetermined result based on a measurement result by the measuring circuit.
- the measuring circuit in the phase difference measuring circuit according to any one of claims 15 to 17, the measuring circuit holds a measurement value. Since the statistical circuit generates statistical information based on the information stored in the register, the statistical circuit is set by comparing the phase difference held in each register. It is possible to confirm whether the delay amount is normally delayed, and it is possible to automatically determine whether or not the delay circuit that can set a predetermined delay amount operates normally.
- phase difference measuring circuit of claim 19 of the present invention The phase difference measurement circuit according to any one of claims 1 to 9, further comprising a delay control circuit that controls a delay amount of the delay circuit, wherein the delay circuit has a different delay amount of the input signal force based on control of the delay control circuit. Since two or more signals are generated, it can be confirmed whether two or more set delay amounts are normally delayed, and the delay circuit that can set two or more different delay amounts operates normally. This has the effect of automatically determining whether or not.
- the delay control circuit includes the delay circuit for each predetermined time interval. Since the delay amount is changed, it is possible to check at each time interval whether two or more set delay amounts are normally delayed, and there is a delay circuit that can set two or more different delay amounts. There is an effect that it is possible to automatically determine whether it is operating normally.
- the delay control circuit includes the delay circuit every predetermined time interval. Control is performed to monotonically increase or decrease the delay amount, so that it is possible to check at each time interval whether two or more set delay amounts are normally delayed step by step. There is an effect that it is possible to automatically determine whether or not a delay circuit capable of setting different delay amounts operates normally.
- the periodic signal generating circuit includes the comparison pulse.
- a charge pump circuit that is driven in accordance with the output from the generation circuit and outputs charges, a capacity for storing the output charge of the charge pump circuit, and that the accumulated voltage of the capacity exceeds an arbitrary reference voltage Since a reset pulse generator that generates a reset pulse is provided, a high-speed pulse signal is required by converting the phase difference into an amount of charge and accumulating even the phase difference generated by a minute delay amount. This has the effect of accurately measuring the phase difference without having to
- the charge pump circuit includes a pulse output from the comparison pulse generating circuit. Since the amount of output charge is controlled according to the width, Even with the generated phase difference, the amount of charge corresponding to the phase difference can be output, and the phase difference can be accurately measured without requiring a high-speed pulse signal.
- the measuring circuit counts the period of the reset pulse with an arbitrary clock. Since the reset pulse period is converted into a digital value and output, the phase difference generated by a small delay amount can be obtained as a digital value, and the accuracy can be obtained without requiring a high-speed pulse signal. There is an effect that the phase difference can be measured well.
- FIG. 1 is a block diagram showing a configuration of a phase difference measurement circuit according to Embodiment 1 of the present invention.
- FIG. 2 is a phase difference measurement according to Embodiment 1 of the present invention. Diagram showing the relationship between input and output of an example circuit comparison pulse generator
- FIG. 3 is a block diagram showing a configuration of a periodic signal generation circuit of the phase difference measurement circuit according to the first embodiment of the present invention.
- FIG. 4 is a diagram showing a detailed configuration of a periodic signal generation circuit of the phase difference measurement circuit according to the first embodiment of the present invention.
- FIG. 5 is a diagram showing equivalent phase conversion and accumulation of phase differences in the phase difference measurement circuit according to Embodiment 1 of the present invention.
- FIG. 6 is a diagram showing a relationship between a phase difference and a periodic signal in the phase difference measurement circuit according to the first embodiment of the present invention.
- FIG. 7 is a diagram showing how phase differences are accumulated in the phase difference measurement circuit according to Embodiment 1 of the present invention.
- FIG. 8 is a block diagram showing the configuration of the phase difference measuring circuit according to the second embodiment of the present invention.
- FIG. 9 is a comparison of the phase difference measuring circuit according to the second embodiment of the present invention. Diagram showing the relationship between an example of a pulse generator and input / output
- FIG. 10 is a block diagram showing a configuration of a phase difference measurement circuit according to the third embodiment of the present invention.
- FIG. 11 is a diagram showing an example of a delay circuit of the phase difference measurement circuit according to the third embodiment of the present invention.
- FIG. 12 is a block diagram showing a configuration of a phase difference measurement circuit according to the fourth embodiment of the present invention.
- FIG. 13 is a block diagram showing a configuration of a phase difference measurement circuit according to the fifth embodiment of the present invention.
- FIG. 14 is a block diagram showing a configuration of a phase difference measurement circuit according to the sixth embodiment of the present invention.
- FIG. 15 is a diagram showing an example of a measurement circuit of the phase difference measurement circuit according to the sixth embodiment of the present invention.
- FIG. 16 is a diagram showing the input / output relationship of the measurement circuit in the phase difference measurement circuit according to the sixth embodiment of the present invention.
- FIG. 17 is a block diagram showing a configuration of a phase difference measurement circuit according to the seventh embodiment of the present invention.
- FIG. 18 is a block diagram showing a configuration of a phase difference measurement circuit according to the eighth embodiment of the present invention.
- FIG. 19 is a diagram showing a configuration of a phase difference determination circuit that measures a phase difference using a high-speed pulse.
- 20 is a waveform diagram of signals output from each circuit in the phase difference determination circuit of FIG.
- FIG. 1 is a block diagram showing a configuration of phase difference measurement circuit 10 according to Embodiment 1 of the present invention.
- a phase difference measurement circuit 10 includes a waveform control circuit 103 that outputs an input signal 102 that is one of two input signals at regular intervals, and a waveform control circuit 103.
- a comparison pulse that converts the phase difference between the output signal 1031 that is output and the input signal 101 that is the other input signal into a pulse width at each predetermined timing, and outputs the converted pulse width as a phase difference pulse 1042 From the generation circuit 104, the phase difference pulse 1042 converted by the comparison pulse generation circuit 104, and the periodic signal generation circuit 105 that generates the periodic signal 1051 based on the accumulated phase difference. It consists of a measurement circuit 106 that measures the output periodic signal 1051.
- the waveform control circuit 103 outputs the input signal 102 at regular intervals. For example, as shown in FIG. 2, when the enable signal 2 is Hi, the output period of the input signal 102 is set, and the input signal 102 is output at regular intervals. In the case of the enable signal 2 as shown in FIG. 2, the input signal 10 2 has a phase delayed by an extra 2 ⁇ with respect to the input signal 101.
- the comparison pulse generation circuit 104 receives the input signal 101 and the output 1031 of the waveform control circuit 103.
- the phase difference pulse 1042 having the pulse width as the phase difference between the rising edges of the two signals is output.
- the phase difference pulse 1042 can be generated, for example, by configuring an RS latch circuit as shown in FIG.
- the phase difference pulse 1042 between the signal 1041 obtained by controlling the waveform of the input signal 101 using the enable signal 1 having the same cycle as the enable signal 2 and the output 1031 of the waveform control circuit 103.
- phase difference pulse 1042 having the pulse width as the two signals is converted. Is generated. If the input signal is a periodic signal, 0 and (2 ⁇ + ⁇ ) are equivalent. Then, the phase difference pulse 1042 is input to the periodic signal generation circuit 105.
- Embodiment 1 shows an example in which the waveform control of the input signal 101 is performed in the RS latch circuit. However, the waveform control of the input signal 101 may be performed in the previous stage of the circuit. The waveform control of the input signal 102 performed in step 1 may be configured in the RS latch circuit.
- the enable signal 2 may be output at an arbitrary period.
- FIG. 3 shows a block diagram of the periodic signal generation circuit 105.
- the periodic signal generation circuit 105 is driven in accordance with the phase difference pulse 1042 output from the comparison pulse generation circuit 104, and outputs a charge pump circuit 1052 that outputs charges, and is output from the charge pump circuit 1052.
- a triangular wave generation circuit 1053 that accumulates a predetermined amount of electric charge to generate a triangular wave, and a comparator 1054 that generates a periodic signal using the triangular wave output from the triangular wave generation circuit 1053.
- FIG. 4 is a diagram showing in detail the periodic signal generation circuit 105 shown in FIG.
- the charge pump circuit 1052 includes a current source 10521 that outputs electric charge and a switch 10522 controlled by a phase difference pulse 1042, and the switch 10522 Then, the electric charge from the current source 10521 is output to the triangular wave generation circuit 1053.
- the triangular wave generation circuit 1053 has a capacitor 10531 for accumulating charges and a switch 10532 for resetting the capacitor, and sequentially accumulates output charges from the charge pump circuit 1052 in the capacitor 10531.
- the comparator 1054 receives the output from the capacitor 10531 and an arbitrary reference voltage 10541 as an input, and serves as a reset pulse generator that generates a reset pulse indicating that the accumulated voltage of the capacitor 10531 has exceeded the arbitrary reference voltage 10541.
- the generated reset pulse is output as a periodic signal.
- the reset pulse is also output to the switch 10532 of the triangular wave generation circuit 1053, and the capacitor 10531 is refreshed by the output of the reset pulse.
- the charge pump circuit 1052 outputs the charge from the current source 10521 to the triangular wave generation circuit 1053 via the switch 10522.
- the triangular wave generation circuit 1053 sequentially accumulates output charges of the charge pump circuit in the capacitor 10531.
- the charges are sequentially stored in the capacitor 10531.
- the output of the comparator 1054 changes when the charge accumulated in the capacitor 10531 exceeds a reference voltage 10541 that is a charge amount having a predetermined amount of phase difference. In other words, a reset pulse is generated at this time.
- the capacitor 10531 is refreshed by a reset pulse output from the comparator 1054.
- FIG. 5 shows the relationship between the output of the capacitor 10531, that is, the potential of the node 10533 and the phase difference pulse 1042.
- the charge pump circuit 1052 and the triangular wave generation circuit 1053 are time / voltage conversion circuits. Since the pulse width of the phase difference pulse 1042 is a time for charging the capacitor 10531, as shown in FIG. 5, the potential of the node 10 533 rises only during the period in which the phase difference pulse 1042 is Hi. That is, in the charge pump circuit 1052, the output charge amount is controlled according to the pulse width of the phase difference pulse 1042.
- the output of the capacitor 10531 that is, the node 10533 has the capacitance value and the input signal 101.
- the potential is determined by the accumulation of the phase difference of 102.
- comparator 1054 changes its output when node 10533 exceeds reference voltage 10541, and A set pulse is output.
- the triangular wave generation circuit 1053 discharges the accumulated electric charge by setting the output 1051 of the comparator 1054, that is, the reset pulse, to the input of the switch 10532, and sets the potential of the node 10533 to zero.
- the potential of the node 10533 indicates the accumulated amount of the phase difference between the two input signals 101 and 102. Therefore, if the potential exceeds the reference voltage 105 41, the comparator 1054 , The switch 10532 is turned on by the reset pulse output from the comparator 1054, and the capacitor 10531 is refreshed. At the same time that the capacitor 10531 is refreshed, the comparator output 1054 changes again and this momentary force also begins to accumulate.
- the result output 1051 of the comparator 1054 is a periodic signal.
- FIG. 6 is a diagram showing the relationship between the periodic signal 1051 and the phase difference between the two signals 101 and 102.
- the potential of the node 10533 rises as the phase difference pulses of the input signals 101 and 102 are accumulated as electric charges as described above. Then, when the potential of the node exceeds the reference voltage 10541, the output of the comparator 1054 changes, that is, a reset pulse is output, whereby the capacitor 10531 is refreshed and the potential force of the node 10533 is obtained. By repeating this, a periodic signal 1051 is generated.
- the period of the periodic signal 1051 is measured by the measuring circuit 106.
- An example of a measurement circuit is a counter.
- the frequency of the counter clock may be the same as that of the input signal.
- the phase difference between the two input signals, which are analog can be obtained as a digital value, and this is used as the measurement result of the phase difference measurement circuit 10.
- the clock with a frequency that can express that the calculated minimum phase difference count value of the original phase difference is 1 digit or more is preferred, and the accuracy increases as the number of digits increases.
- FIG. 6B shows the case where the original phase difference ⁇ is small! /.
- the pulse width of the phase difference pulse 1042 is narrow, the voltage increase value of the node 10533 per pulse is small. Therefore, the input signals 101 and 102 have a charge voltage of 10533 with a capacitance of 10531
- the number of comparisons required to match 10541 is large, that is, the time required for the output of the comparator 1054 to change is increased. Therefore, the period of the periodic signal 1051 becomes longer, and the digital numerical value output from the measuring circuit 106 shows a large value.
- FIG. 6 (c) shows a case where the phase difference is large.
- the pulse width of the phase difference pulse 1042 is wide, the voltage rise value of the node 10533 for each pulse is large.
- the charging voltage 10533 of the capacitor 10531 matches the reference voltage 10541.
- the number of comparisons required to complete is small. In other words, the time required until the output of the comparator 1054 changes is shortened. Therefore, the cycle of the periodic signal 1051 is shortened, and the digital numerical value output from the measurement circuit 106 shows a small value.
- FIG. 7 shows the relationship between the frequency and phase difference of two input signals.
- the pulse width of the phase difference pulse 1042 is 2 ⁇ + ⁇ .
- the potential of the node 10533 is 1 Assuming that the voltage rises by Va with one charge, 2 X Va is obtained with two charges.
- Fig. 7 (b) shows the force when the frequency of the two input signals is half that of Fig. 7 (a), that is, when the cycle is doubled. Even with the same phase difference of 2 ⁇ + ⁇ , the potential rises by 2 X Va in a single charge. Therefore, at this time, by halving the current source 10521 for charging the capacitor 10531, Va can be made even by one charge. In other words, the accuracy of measurement can be maintained by adaptively changing the size of the current source 10521 according to the frequency of the input signal.
- the phase difference between the two input signals 101 and 102 is converted into the period of the periodic signal 1051, and by measuring this period, the phase difference can be obtained as a digital value.
- the waveform control circuit 103 performs a conversion equivalent to adding the phase difference by 2 ⁇ .
- the phase difference is a minute phase difference that cannot generate a pulse width indicating the correct phase difference ⁇ .
- the phase difference of 2 ⁇ can be obtained when the phase difference between the two signals is 0. For example, it can be easily measured by applying the same signal to the input signals 101 and 102.
- the phase difference measuring circuit includes the waveform control circuit 103 that outputs the input signal 102 at every fixed period, and the output of the input signal 101 and the waveform control circuit.
- a comparison pulse generation circuit 104 that outputs the phase difference from 1031 as a pulse width at each predetermined timing, and the phase difference pulse output from the comparison pulse generation circuit 104 is converted into a charge amount, and the converted charge amount is accumulated.
- the periodic signal generation circuit 105 that generates a periodic signal based on the accumulated charge amount, and the period of the periodic signal generated by the periodic signal generation circuit are measured, and the phase difference between two analog input signals is converted into a digital value.
- the phase difference between the two input signals shows the correct phase difference of 0 by accumulating the phase difference pulse that adds 2 ⁇ to the phase difference between the input signals 101 and 102 as a charge.
- Generate pulse width can be measured accurately without the need for a high-speed noise signal, and the circuit itself does not need to be increased in speed and accuracy. Becomes easier.
- the waveform control circuit 103 is configured so that the phase difference pulse indicating the phase difference between the two input signals is added to the original phase difference by 2 ⁇ .
- the waveform control circuit 103 may generate the output signal so that the force phase difference pulse described for generating the output signal is added to the original phase difference by ⁇ ⁇ ( ⁇ is a natural number).
- the phase difference measurement circuit according to the second embodiment of the present invention is provided with a phase shift circuit that shifts an input signal by a predetermined phase instead of the waveform control circuit according to the first embodiment.
- a phase difference measurement circuit according to the second embodiment will be described with reference to FIG. 8 and FIG. The description of the same configuration as in the first embodiment will be omitted, and only the points different from the first embodiment will be described.
- FIG. 8 is a diagram showing a configuration of the phase difference measurement circuit according to the second embodiment of the present invention
- FIG. 9 shows an example of a comparison pulse generation circuit of the phase difference measurement circuit according to the second embodiment. It is a figure which shows the relationship of input / output.
- the phase difference measurement circuit 20 shifts the input signal 102 by a predetermined phase instead of the waveform control circuit 103 in the first embodiment.
- Out A phase shift circuit 203 is provided.
- the input signal 102 is shifted by a predetermined phase and output.
- shifting is performed so that an output signal 2031 that outputs a phase in which each nors is delayed by 2 ⁇ is obtained.
- the comparison pulse generation circuit 104 outputs a phase difference pulse 1042 having the pulse width as the phase difference between the rising edges of the two signals based on the input signal 101 and the output 2031 of the phase shift circuit 203.
- the phase difference pulse 1042 can be generated by an RS latch circuit similar to that shown in FIG.
- the RS latch circuit generates the phase difference pulse 1042 between the signal 1041 obtained by controlling the waveform of the input signal 101 using the enable signal and the output 2031 whose phase is shifted by the phase shift circuit 203, That is, for example, two signals of the input signals 101 and 102 having a phase difference ⁇ are converted into two signals having a phase difference 2 ⁇ + 0, and a phase difference pulse 1042 having a pulse width as a signal is generated. Is done. If the input signal is a periodic signal, 0 and (2 ⁇ + 0) are equivalent.
- phase difference measurement circuit 20 an example in which an RS latch circuit is used as the comparison pulse generation circuit 104 is not limited to this.
- the input signals 101 and 102 are not limited thereto. Any circuit that can generate the phase difference pulse 1042 to which the phase difference of 2 ⁇ is added.
- the waveform control of the input signal 101 may be performed in the previous stage of the RS latch circuit.
- the phase difference measurement circuit includes the phase shift circuit 203 that outputs the input signal 102 by shifting it by a predetermined phase, and the input signal 101 and the phase shift circuit.
- the comparison pulse generation circuit 104 that outputs the phase difference from the output 2031 from the 203 as a pulse width at each predetermined timing, and the phase difference pulse output from the comparison pulse generation circuit 104 is converted into a charge amount, and the converted charge
- a periodic signal generation circuit 105 that accumulates a quantity and generates a periodic signal based on the accumulated charge amount, and a periodic signal generated by the periodic signal generation circuit
- a measurement circuit that outputs the phase difference between two analog input signals as digital values, so that the phase difference pulse obtained by adding 2 ⁇ to the phase difference between the input signals 101 and 102 is used as the charge.
- Accumulation enables accurate measurement without requiring a high-speed pulse signal even if the phase difference between the two input signals is so small that a pulse width indicating a correct phase difference ⁇ cannot be generated. This eliminates the need to increase the speed and accuracy of the circuit itself, thereby simplifying the circuit configuration.
- phase difference measuring circuit In the phase difference measuring circuit according to the second embodiment, the phase is shifted by the force ⁇ ⁇ ( ⁇ is a natural number) described for the phase shift circuit 203 that shifts the phase of the input signal by 2 ⁇ .
- a phase shift circuit may be used.
- the phase difference measurement circuit includes an input signal having a predetermined period and a predetermined delay amount in order to determine whether the delay circuit is operating normally. The phase difference from the signal delayed by a certain amount is measured.
- phase difference measurement circuit according to Embodiment 3 of the present invention will be described.
- the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
- FIG. 10 is a block diagram showing a configuration of the phase difference measurement circuit 30 according to the third embodiment of the present invention.
- a delay circuit 303 delays an input signal 301 having a predetermined period by a predetermined delay amount, and a delay control circuit 310 controls a delay amount delayed by the delay circuit.
- the delay circuit 303 delays the input signal 301 by a predetermined delay amount. For example, when the delay amount is converted into a phase, when the signal is delayed by the phase ⁇ , the relationship between the output 3031 of the delay circuit 303 and the input signal 301 is the relationship between the input signals 101 and 102 shown in FIG. It becomes equivalent to the relationship. Assuming that waveform control circuit 103 calculates 2 ⁇ for the signal as in the first embodiment, the phase difference between the two signals 301 and 1031 input to comparison pulse generation circuit 104 is 2 ⁇ + ⁇ . . Therefore, the operation after comparison pulse generation circuit 104 is the same as that of the first embodiment.
- Delay circuit 303 is shown in the figure. As shown in FIG. 11, it is composed of noffers 30300 to 30307, and V and shift inputs are also input to the multiplexer 3038, and only one is selected by the control by the delay control circuit 310 to become the output 30 31.
- the delay control circuit 310 has an up counter as the simplest one. Counts up with clock 3 100a and resets with reset 3100b.
- the delay circuit 303 is controlled by the delay control circuit 310 so that the delay amount gradually increases at a predetermined time interval.
- the input / output delay amount of the buffers 30300 to 30307 is controlled to be the same as the cycle of the input signal 301 by a PLL (Phase Locked Loop) or DLL (Delay Locked Loop)
- the output 3031 of the delay circuit has a phase shifted by 2 ⁇ / 8 ( ⁇ is 0 to 7) of the input signal 301.
- the delay circuit that delays the input signal by the buffers 30300 to 30307 is used.
- the present invention is not limited to this. Based on the control of the delay control circuit, the input signal power delay amount differs. Any delay circuit that generates the above signals may be used.
- a predetermined delay amount that is, a known phase difference is generated by the delay circuit 303, but it is measured by the subsequent comparison pulse generation circuit 104, the periodic signal generation circuit 105, and the measurement circuit 106. Will be explained.
- the delay circuit 303 When the delay circuit 303 is mounted on a semiconductor, manufacturing variations are inevitable. The same applies to variations in delay time due to electrical characteristics and temperature characteristics. In consideration of these factors, it is easy to evaluate or check whether or not the delay circuit 303 outputs with a delay of the set delay amount.
- the delay control circuit 310 can select the delay amount for each buffer, that is, the phase difference, and even if the phase difference is very small, the waveform control circuit 1103 adds, for example, a phase of 2 ⁇ , so accurate measurement is possible. It becomes possible.
- the operation after the comparison pulse generation circuit 104 is the same as that of the first embodiment. In this way, whether or not the delay circuit 303 is delayed by a normal delay amount for each buffer can be determined by measuring the phase difference between the input signal 301 and the signal 3031 delayed by the delay circuit 303. In
- the phase difference measuring circuit controls the delay circuit 303 that delays the input signal 301 by a predetermined delay amount, and the delay amount of the delay circuit 303.
- the phase difference converted into a pulse width at each predetermined timing, and the comparison pulse generation circuit 104 that outputs the converted pulse width 1042 is accumulated, and the phase difference converted into the pulse width is accumulated, and the accumulated phase difference is accumulated.
- a measurement circuit 106 for measuring the period of the periodic signal 1051, and the input signal is delayed by a predetermined delay amount by the delay circuit. Since the phase difference between the signal and the signal delayed by the delay circuit is measured, by confirming the phase difference caused by the delay circuit 303, it is confirmed whether the set delay amount is delayed. Delay circuit And normal operation, a determination may be made whether.
- the delay control circuit 310 is used to control the delay so as to gradually decrease on the contrary to the force that is controlled to gradually increase the delay amount at every predetermined time interval. Alternatively, it may be changed to a desired delay amount at predetermined time intervals.
- a delay circuit capable of setting a plurality of delay amounts is used.
- a delay circuit with a fixed delay amount may be used.
- the delay circuit can be made small. Since no delay control circuit is required, the circuit scale can be reduced.
- phase difference measurement circuit is configured such that the waveform control circuit outputs the phase difference pulse indicating the phase difference between the two input signals by 2 ⁇ to the original phase difference.
- the waveform control circuit 103 may generate the output signal so that the phase difference pulses are added by ⁇ ( ⁇ is a natural number).
- the phase difference measurement circuit according to the fourth embodiment of the present invention is provided with a phase shift circuit that shifts an input signal by a predetermined phase instead of the waveform control circuit of the phase difference measurement circuit according to the third embodiment. It is.
- a phase difference measurement circuit 40 according to the fourth embodiment will be described with reference to FIG. A description of the same configuration as that of the third embodiment will be omitted, and only differences from the third embodiment will be described.
- FIG. 12 is a diagram showing a configuration of the phase difference measurement circuit according to the fourth embodiment of the present invention.
- the phase difference measurement circuit 40 according to the fourth embodiment includes a third embodiment as shown in FIG.
- a phase shift circuit 203 is provided that outputs the signal 3031 output from the delay circuit 303 by shifting it by a predetermined phase.
- the delay circuit 303 delays the input signal 301 by a predetermined delay amount. For example, considering the delay amount as a phase, when the signal is delayed by the phase ⁇ , the relationship between the output 3031 of the delay circuit 303 and the input signal 301 is the relationship between the input signals 101 and 102 shown in FIG. Become equivalent.
- the phase shift circuit 203 as in the second embodiment, each pulse of the input signal is shifted so as to obtain an output signal 2031 that outputs a phase delayed by 2 ⁇ .
- the phase difference between the two signals 301 and 2031 input to the comparison pulse generation circuit 104 is 2 ⁇ + ⁇ . Therefore, the operation after comparison pulse generation circuit 104 is the same as that of the first embodiment.
- the delay circuit 303 and the delay control circuit 310 are configured as shown in FIG. 11, as in the third embodiment, and the delay control circuit 310 causes the delay circuit 303 to gradually delay at predetermined time intervals. Is controlled to be large.
- the delay control circuit 310 causes the delay circuit 303 to gradually delay at predetermined time intervals. Is controlled to be large.
- the input / output delay amount of the buffers 30300 to 30307 is controlled by the PLL (Phase Locked Loop) or DLL (Delay Locked Loop) to be the same as the cycle of the input signal 301
- the output 3031 of the delay circuit is the phase shifted by 2 ⁇ / 8 ( ⁇ is 0 to 7) of the input signal 301.
- the delay circuit may be any delay circuit that generates two or more signals having different delay amounts from the input signal based on the control of the delay control circuit.
- the phase difference measurement circuit 40 includes the delay circuit 303 that delays the input signal 301 by a predetermined delay amount, and the delay control that controls the delay amount of the delay circuit 303.
- a circuit 310 a phase shift circuit 203 that shifts the phase 3031 of the signal delayed by the delay circuit by 2 ⁇ , and the input signal 301 and the signal 2031 shifted by 2 ⁇ by the phase shift circuit.
- the phase difference is converted into a pulse width at every predetermined timing, the comparison pulse generation circuit 104 that outputs the converted pulse width 1042, and the phase difference converted to the pulse width is accumulated, and the accumulated phase difference is accumulated.
- a periodic signal generation circuit 105 that generates a periodic signal 1051 based on the signal, and a measurement circuit 106 that measures the period of the periodic signal 1051, an input signal having a predetermined period, and a predetermined delay for the input signal. Phase difference from the signal delayed by Since to measure, to confirm the phase difference caused by the delay circuit As a result, it is possible to confirm whether the set delay amount is delayed and to determine whether the delay circuit is operating normally.
- phase difference measurement circuit 40 the force ⁇ ⁇ ( ⁇ is a natural number) described for the phase shift circuit 203 that shifts the phase of the signal output from the delay circuit 303 by 2 ⁇ .
- phase shift circuit that shifts the phase only!
- the delay control circuit 310 is used to control the delay so as to gradually decrease on the contrary to the force that is controlled to gradually increase the delay amount at every predetermined time interval. Alternatively, it may be changed to a desired delay amount at predetermined time intervals.
- a delay circuit capable of setting a plurality of delay amounts is used.
- a delay circuit with a fixed delay amount may be used.
- the delay circuit can be made small. Since no delay control circuit is required, the circuit scale can be reduced.
- the phase difference measurement circuit according to the fifth embodiment of the present invention delays an input signal by a predetermined amount by a delay circuit instead of the waveform control circuit of the phase difference measurement circuit according to the third embodiment.
- the phase of the delayed signal is further delayed by 2 ⁇ .
- a phase difference measurement circuit 50 according to the fifth embodiment will be described with reference to FIG. A description of the same configuration as that of the third embodiment will be omitted, and only differences from the third embodiment will be described.
- FIG. 13 shows a configuration of phase difference measurement circuit 50 according to the fifth embodiment of the present invention.
- the phase difference measurement circuit 50 delays the input signal 301 by a predetermined delay amount instead of the waveform control circuit 103 in the third embodiment.
- a delay circuit 503 is provided that outputs a signal 5031 obtained by further delaying the phase of the delayed signal by 2 ⁇ .
- delay circuit 503 delays input signal 301 by a predetermined delay amount.
- the delay amount is ⁇ .
- the delay circuit 503 obtains an output signal 5031 that outputs a phase in which each pulse of the signal delayed by a predetermined delay amount is further delayed by 2 ⁇ .
- the phase difference between the two signals 301 and 5031 input to the comparison pulse generation circuit 104 is 2 ⁇ + ⁇ . This is equivalent to the relationship between the input signals 301 and 1031 shown in FIG. Therefore, the operation after comparison pulse generation circuit 104 is the same as that of the first embodiment.
- the delay circuit 503 is configured to include notches 30300 to 30307 as shown in FIG. 11, and only one is selected by the delay control circuit 310. To do.
- the input / output delay amount of the noffers 30300 to 30307 is controlled to be the same as the period of the input signal 301 by a PLL (Phase Locked Loop) or DLL (Delay Locked Loop)
- the phase of the input signal is shifted by 2 ⁇ 8 ( ⁇ is 0 to 7).
- the delay circuit 503 is controlled by the delay control circuit so that the delay amount ⁇ gradually increases at a predetermined time interval.
- the delay circuit 503 delays by 2 ⁇ in the subsequent stage after being phased by 2 ⁇ ⁇ ⁇ 8 ( ⁇ is 0 to 7) as described above. For example, by configuring two inverters (not shown) after the multiplexer 3038, the phase is further delayed by 2 ⁇ , and the phase of the input signal 301 is shifted by 2 ⁇ + ⁇ by the delay circuit 503. It is done. Note that the phase may be delayed by 2 ⁇ before the buffer 30300. In this case, an inverter may be provided before the buffer 30300.
- the phase difference measuring circuit 50 delays the input signal by a predetermined delay amount and further delays the phase of the delayed signal by 2 ⁇ .
- a delay circuit 503 for controlling, a delay control circuit 310 for controlling the delay amount of the delay circuit 503, and a phase difference between the input signal 301 and the signal 5031 output from the delay circuit 503 is converted into a pulse width at every predetermined timing.
- the pulse generation circuit 104 that outputs the converted pulse width 1042 and the periodic signal generation circuit that accumulates the phase difference converted into the pulse width and generates the periodic signal 1051 based on the accumulated phase difference.
- a measurement circuit 106 for measuring the period of the periodic signal 1051, and measures a phase difference between an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount. So that the delay circuit By checking the generated phase difference, it can be confirmed whether the set delay amount is delayed and whether the delay circuit is operating normally can be determined. .
- the delay is delayed by a predetermined delay amount.
- a delay circuit that further delays the phase by ⁇ ( ⁇ is a natural number) using n inverters may be used.
- the delay control circuit 310 is used to control the delay amount to gradually decrease on the contrary to the force that is controlled to gradually increase the delay amount at every predetermined time interval. Alternatively, it may be changed to a desired delay amount at predetermined time intervals.
- a delay circuit capable of setting a plurality of delay amounts is used.
- a delay circuit with a fixed delay amount may be used.
- the delay circuit can be made small. Since no delay control circuit is required, the circuit scale can be reduced.
- the phase difference measurement circuit according to the fifth embodiment of the present invention provides the phase difference measurement circuit according to the third embodiment with statistical information for a predetermined period in order to automatically determine whether the delay circuit is operating normally. A statistical circuit for obtaining a result is provided.
- phase difference measurement circuit 60 according to Embodiment 6 of the present invention will be described.
- the same components as those in the first embodiment and the third embodiment are denoted by the same reference numerals, and description thereof is omitted.
- FIG. 14 is a block diagram showing a phase difference measurement circuit 60 having a statistical circuit 407 that generates statistical information of phase differences within a predetermined period based on the measurement result by the measurement circuit.
- the delay circuit 303 delays the input signal 301 by a predetermined delay amount. For example, considering the delay amount as a phase, when the signal is delayed by the phase ⁇ , the relationship between the output 3031 of the delay circuit 303 and the input signal 301 is the relationship between the input signals 101 and 102 shown in FIG. Become equivalent.
- the waveform control circuit 103 adds 2 ⁇ to the signal as in the first embodiment. As a result, the phase difference between the two signals 301 and 1031 input to the comparison pulse generation circuit 104 becomes 2 ⁇ + ⁇ . Accordingly, the operations of the comparison pulse generation circuit 104 and the periodic signal generation circuit 105 are the same as those in the first embodiment.
- the delay circuit 303 and the delay control circuit 310 are configured as shown in FIG. 11 as in the third embodiment, and the delay control circuit 310 causes the delay circuit 303 to gradually delay at a predetermined time interval. Is controlled to be large.
- the delay control circuit 310 causes the delay circuit 303 to gradually delay at a predetermined time interval. Is controlled to be large.
- the input / output delay amount of the buffers 30300 to 30307 is controlled by the PLL (Phase Locked Loop) or DLL (Delay Locked Loop) to be the same as the cycle of the input signal 301
- the output 3031 of the delay circuit is the phase shifted by 2 ⁇ / 8 ( ⁇ is 0 to 7) of the input signal 301.
- the delay circuit may be any delay circuit that generates two or more signals having different delay amounts from the input signal based on the control of the delay control circuit.
- FIG. 15 is a diagram showing an example of the circuit configuration of the measurement circuit 306. As shown in FIG.
- the measurement circuit 306 measures the period of the periodic signal 1051 using the counter 3061.
- a clock for counting up may be a reference clock having an arbitrary frequency, for example, the same frequency as the input signal 301, and a signal for resetting the count value is a periodic signal 1051.
- Register ⁇ 3062 holds the period of the periodic signal, and holds the force value at that time immediately before the counter 3061 is reset by the periodic signal 1051.
- Register ⁇ 3063 holds the value of register ⁇ 3062 immediately before register ⁇ 3062 is updated by periodic signal 1051. In other words, register ⁇ holds the cycle of the previous periodic signal 1051.
- Comparator 3064 compares the values of register ⁇ 30 62 and register ⁇ 3063, and outputs 1 when the value of register ⁇ 3062 is larger, and 0 when register ⁇ 3063 is larger. This is the output 308 of the measurement circuit 306.
- the number of forces using two registers to hold the measurement values of different periods is not limited, and two or more registers may be used.
- the force that is the statistical circuit 407 is to generate statistical information by storing the output history of the measurement circuit 306 within a predetermined period.
- the D flip-flop circuit 4072 is reset by the same signal as the reset signal 3100b of the delay control circuit 310.
- the operation of automatically determining whether or not the delay circuit is operating normally in the phase difference measurement circuit 60 according to the sixth embodiment will be described with reference to FIG.
- the delay amount of the delay circuit 303 is measured only once with respect to the set delay amount, and the delay control circuit 310 is controlled so that the delay amount increases monotonously. I shall control it. In addition, the settling time until the set delay amount becomes stable is ignored, and the reference clock of the measurement circuit 306 has the same frequency as the input signal 301.
- the phase difference obtained by converting the delay amount is small at first, but the delay circuit 303 is controlled by the delay control circuit 310 so that the delay amount becomes large, so the phase difference is large. Continue. If this is indicated by a change in the potential of the node 10533 of the capacitor 10531, it means that the time for the reference voltage 10541 becomes shorter. That is, the cycle of the periodic signal 1051 is shortened, and the numerical value counted by the counter 3061 is also decreased.
- the phase difference measuring circuit 60 constitutes a BIST (Built-In Self Test) circuit in which the measurement start signal is 3100b and the measurement result is evaluated as 408.
- BIST Built-In Self Test
- V is a one-time measurement for each phase amount, but by measuring over multiple cycles, the average and variance, and statistical data can be easily obtained. It ’s possible to get a good deal!
- the phase difference measurement circuit 60 is configured so that the input signal 3 A delay circuit 303 that delays 01 by a predetermined delay amount; a delay control circuit 310 that controls the delay amount of the delay circuit 303; a waveform control circuit 103 that outputs the delayed signal at regular intervals; Comparison pulse generation that converts the phase difference between the input signal 301 and the signal 3031 output by the waveform control circuit at regular intervals into a pulse width at a predetermined timing and outputs the converted pulse width 1031 A circuit 104, a periodic signal generation circuit 105 for accumulating the phase difference converted into the pulse width, and generating a periodic signal 1051 based on the accumulated phase difference, and a measurement circuit for measuring the period of the periodic signal 105 306 and a statistical circuit 407 for generating statistical information of phase difference within a predetermined period based on the measurement result by the measurement circuit 306, and an input signal 301 having a predetermined period, and the input signal 301 was delayed by a
- the delay control circuit 310 is used to control the delay so as to gradually decrease on the contrary to the force that is controlled to gradually increase the delay amount at every predetermined time interval. Alternatively, it may be changed to a desired delay amount at predetermined time intervals.
- a delay circuit capable of setting a plurality of delay amounts is used.
- a delay circuit in which the delay amount is fixed may be used.
- the delay circuit can be made small. Since no delay control circuit is required, the circuit scale can be reduced.
- phase difference measurement circuit is configured so that the phase difference pulse indicating the phase difference between the two input signals is added to the original phase difference by 2 ⁇ so that the waveform control circuit outputs the output signal.
- the waveform control circuit 103 may generate the output signal so that the phase difference pulses are added by ⁇ ( ⁇ is a natural number).
- the phase difference measurement circuit according to Embodiment 7 of the present invention is provided with a phase shift circuit that shifts an input signal by a predetermined phase instead of the waveform control circuit of the phase difference measurement circuit according to Embodiment 6. It is.
- a phase difference measurement circuit according to the seventh embodiment will be described with reference to FIG. Embodiment 6 A description of the same configuration will be omitted, and only differences from Embodiment 6 will be described.
- FIG. 17 is a diagram showing a configuration of the phase difference measurement circuit according to the seventh embodiment of the present invention.
- the phase difference measurement circuit 70 uses a signal 3031 output from the delay circuit 303 as a predetermined value instead of the waveform control circuit 103 in the sixth embodiment.
- a phase shift circuit 203 that shifts and outputs the phase is provided.
- delay circuit 303 delays input signal 301 by a predetermined delay amount. For example, considering the delay amount as a phase, when the signal is delayed by the phase ⁇ , the relationship between the output 3031 of the delay circuit 303 and the input signal 301 is the relationship between the input signals 101 and 102 shown in FIG. Become equivalent.
- the phase shift circuit 203 as in the second embodiment, each pulse of the input signal is shifted so as to obtain an output signal 2031 that outputs a phase delayed by 2 ⁇ .
- the two signals 301 and 2031 input to the comparison pulse generation circuit 104 have a phase difference of 2 ⁇ + ⁇ , and the input signal 301 and the output signal 1031 of the waveform control circuit shown in FIG. It is equivalent to the relationship. Therefore, the operation after comparison pulse generation circuit 104 is the same as that of the sixth embodiment.
- the delay circuit 303 and the delay control circuit 310 are configured as shown in FIG. 11 as in the third embodiment.
- the delay control circuit 310 causes the delay circuit 303 to gradually increase the delay amount at a predetermined time interval. Is controlled to be large.
- the input / output delay amount of the buffers 30300 to 30307 is controlled by the PLL (Phase Locked Loop) or DLL (Delay Locked Loop) to be the same as the cycle of the input signal 301
- the output 3031 of the delay circuit is the phase shifted by 2 ⁇ / 8 ( ⁇ is 0 to 7) of the input signal 301.
- the delay circuit may be any delay circuit that generates two or more signals having different delay amounts from the input signal based on the control of the delay control circuit.
- the phase difference measurement circuit 70 includes a delay circuit 303 that delays an input signal having a predetermined period by a predetermined delay amount, and the delay circuit 303 delays.
- a delay control circuit 310 for controlling the amount, a phase shift circuit 203 for shifting the phase of the signal delayed by the delay circuit 303 by 2 ⁇ , and a signal shifted by 2 ⁇ by the input signal and the phase shift circuit
- a comparison pulse generation circuit 104 that outputs the converted pulse width at each predetermined timing, and converts the pulse width into the pulse width.
- a statistical circuit 407 for generating phase difference statistical information within a predetermined period is provided, and an input signal having a predetermined period and a signal obtained by delaying the input signal by a predetermined delay amount are provided. Since the phase difference is measured, it is possible to confirm whether the set delay amount is delayed by checking the phase difference caused by the delay circuit. Judgment can be made automatically.
- phase difference measuring circuit only the force ⁇ ⁇ ( ⁇ is a natural number) described for the phase shift circuit 203 that shifts the phase of the signal output from the delay circuit 303 by 2 ⁇ . Also good as a phase shift circuit to shift the phase!
- the delay control circuit 310 is used to control the delay amount to gradually decrease on the contrary to the force that is controlled to gradually increase the delay amount at predetermined time intervals. Alternatively, it may be changed to a desired delay amount at predetermined time intervals.
- a delay circuit capable of setting a plurality of delay amounts is used.
- a delay circuit with a fixed delay amount may be used. In this case, the delay circuit can be made small. Since no delay control circuit is required, the circuit scale can be reduced.
- the phase difference measurement circuit according to the eighth embodiment of the present invention delays an input signal by a predetermined amount by a delay circuit instead of the waveform control circuit of the phase difference measurement circuit according to the sixth embodiment.
- the phase of the delayed signal is further delayed by 2 ⁇ .
- phase difference measurement circuit 80 according to the eighth embodiment will be described with reference to FIG. The description of the same configuration as in the sixth embodiment will be omitted, and only the differences from the sixth embodiment will be described.
- FIG. 18 shows a configuration of phase difference measurement circuit 80 according to Embodiment 8 of the present invention.
- the phase difference measurement circuit 80 delays the input signal 301 by a predetermined delay amount instead of the waveform control circuit 103 according to the eighth embodiment.
- the signal 8031 is output by delaying the phase of the delayed signal by 2 ⁇ .
- a delay circuit 803 is provided.
- the delay circuit 803 delays the input signal 301 by a predetermined delay amount.
- the delay amount is ⁇ .
- the delay circuit 803 obtains an output signal 8031 that outputs a phase in which each pulse of the signal delayed by a predetermined delay amount is further delayed by 2 ⁇ .
- the two signals 301 and 8031 input to the comparison pulse generation circuit 104 have a phase difference of 2 ⁇ + ⁇ , and the input signal 301 and the output signal 1031 of the waveform control circuit shown in FIG. Equivalent to relationship. Therefore, the operation after comparison pulse generation circuit 104 is the same as that of the sixth embodiment.
- the delay circuit 503 is configured to include notches 30300 to 30307 as shown in FIG. 11, and only one is selected by the delay control circuit 310. .
- the input / output delay amount of the noffers 30300 to 30307 is controlled to be the same as the period of the input signal 301 by a PLL (Phase Locked Loop) or DLL (Delay Locked Loop)
- the phase of the input signal is shifted by 2 ⁇ 8 ( ⁇ is 0 to 7).
- the delay circuit 803 is controlled by the delay control circuit 310 so that the delay amount ⁇ gradually increases at a predetermined time interval.
- the delay circuit 803 delays by 2 ⁇ in the subsequent stage after being phased by 2 ⁇ ) 8 ( ⁇ is 0 to 7) as described above. For example, by configuring two inverters (not shown) after the multiplexer 3038, the phase is further delayed by 2 ⁇ , and the phase of the input signal 301 is shifted by 2 ⁇ + ⁇ by the delay circuit 803. It is Note that the phase may be delayed by 2 ⁇ before the nother 30300. In this case, an inverter may be provided before the buffer 30300.
- the phase difference measurement circuit 80 delays the input signal 301 having a predetermined period by a predetermined delay amount, and the phase of the delayed signal.
- a comparison pulse generation circuit 104 that converts to a pulse width 1042 and outputs the converted pulse width, and accumulates the phase difference converted to the pulse width,
- a periodic signal generation circuit 105 that generates a periodic signal 1051 based on the accumulated phase difference,
- a measurement circuit 306 that measures the period of the periodic signal 1051, and a phase difference within a predetermined period based on the measurement result of the measurement circuit 306. Since the statistical circuit 407 for generating the statistical information is measured, the phase difference between the input signal having a predetermined period and the signal obtained by delaying the input signal by a predetermined delay amount is measured. By confirming the phase difference caused by, it is possible to confirm whether the set delay amount is delayed, and automatically determine whether the delay circuit operates normally! Can do.
- phase difference measurement circuit 80 the signal power delayed by a predetermined delay amount and the delay circuit 803 that delays by 2 ⁇ have been described.
- ⁇ inverters are used.
- a delay circuit that further delays the phase by ⁇ ( ⁇ is a natural number) may be used.
- the delay control circuit 310 is used to control the delay so as to gradually decrease on the contrary to the force that is controlled to gradually increase the delay amount at every predetermined time interval. Alternatively, it may be changed to a desired delay amount at predetermined time intervals.
- a delay circuit capable of setting a plurality of delay amounts is used.
- a delay circuit with a fixed delay amount may be used.
- the delay circuit can be made small. Since no delay control circuit is required, the circuit scale can be reduced.
- phase difference measurement circuit can be measured with high accuracy even when the phase difference is small, and thus is particularly useful for applications such as a phase difference measurement circuit that requires measurement of a minute phase difference. is there.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Phase Differences (AREA)
- Manipulation Of Pulses (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/663,963 US20070296396A1 (en) | 2004-10-01 | 2005-09-21 | Phase Difference Measurement Circuit |
JP2006539221A JPWO2006038468A1 (ja) | 2004-10-01 | 2005-09-21 | 位相差測定回路 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-290611 | 2004-10-01 | ||
JP2004290611 | 2004-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006038468A1 true WO2006038468A1 (ja) | 2006-04-13 |
Family
ID=36142547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/017415 WO2006038468A1 (ja) | 2004-10-01 | 2005-09-21 | 位相差測定回路 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070296396A1 (ja) |
JP (1) | JPWO2006038468A1 (ja) |
CN (1) | CN101031805A (ja) |
WO (1) | WO2006038468A1 (ja) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4723652B2 (ja) * | 2006-11-02 | 2011-07-13 | 富士通株式会社 | 位相差検出器、及び位相差検出方法 |
US8143879B2 (en) * | 2008-12-30 | 2012-03-27 | General Electric Company | Meter phase identification |
CN101907656B (zh) * | 2009-06-03 | 2012-07-25 | 中国科学院半导体研究所 | 利用固定相移来测量同频信号相位差的方法 |
US8326554B2 (en) * | 2009-12-31 | 2012-12-04 | General Electric Company | Systems, methods, and apparatus for utility meter phase identification |
US8587290B2 (en) | 2011-03-29 | 2013-11-19 | General Electric Company | Method, system and device of phase identification using a smart meter |
CN103134985A (zh) * | 2011-11-24 | 2013-06-05 | 上海华建电力设备股份有限公司 | 一种电源同期捕捉的工程实现方法 |
CN103376357B (zh) * | 2012-04-27 | 2015-10-14 | 瑞昱半导体股份有限公司 | 时脉相位差的估计装置及方法 |
CN103105534B (zh) * | 2013-01-31 | 2015-05-20 | 西安电子科技大学 | 基于fpga相同周期信号的相位差测量方法 |
JP6273126B2 (ja) * | 2013-11-14 | 2018-01-31 | キヤノン株式会社 | Ad変換器、固体撮像素子および撮像システム |
CN103760416B (zh) * | 2013-12-23 | 2016-05-18 | 中国科学院等离子体物理研究所 | 一种定向耦合器测量高功率微波相位的误差分析方法 |
CN103760417B (zh) * | 2014-01-07 | 2016-04-06 | 杭州电子科技大学 | 带测频功能的简易交流信号相位捕获电路 |
CN103913633B (zh) * | 2014-04-25 | 2016-06-01 | 中国计量科学研究院 | 基于多频正弦信号的高频谱分辨率相位谱测量装置及方法 |
CN105182076B (zh) * | 2015-09-18 | 2018-02-23 | 电子科技大学 | 基于矢量网络分析仪的二端口网络相移实时测试方法 |
US10056888B2 (en) * | 2016-03-25 | 2018-08-21 | Qorvo Us, Inc. | RF phase offset detection circuit |
CN106645952B (zh) * | 2016-10-18 | 2019-06-25 | 上海华虹计通智能系统股份有限公司 | 一种信号相位差的检测方法及系统 |
CN106443184B (zh) * | 2016-11-23 | 2023-07-14 | 优利德科技(中国)股份有限公司 | 一种相位检测装置及相位检测方法 |
CN107005098B (zh) * | 2017-03-15 | 2019-10-29 | 香港应用科技研究院有限公司 | 无线功率发射器 |
DE102017109192A1 (de) | 2017-04-28 | 2018-10-31 | Technische Universität Darmstadt | Schaltungsanordnung und Verfahren zum Ermitteln eines Versatzes zwischen zwei Signalflanken |
CN109900971B (zh) * | 2017-12-11 | 2023-01-24 | 长鑫存储技术有限公司 | 脉冲信号的处理方法、装置以及半导体存储器 |
US10778201B1 (en) * | 2019-05-03 | 2020-09-15 | Rohde & Schwarz Gmbh & Co. Kg | System and method of creating periodic pulse sequences with defined absolute phase |
US11711107B2 (en) | 2020-11-10 | 2023-07-25 | Qorvo Us, Inc. | Systems and methods for antenna impedance matching |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5797458A (en) * | 1980-12-09 | 1982-06-17 | Yokogawa Hewlett Packard Ltd | Phase difference detector |
JP2000004123A (ja) * | 1998-06-17 | 2000-01-07 | Matsushita Electric Ind Co Ltd | 位相差演算回路 |
-
2005
- 2005-09-21 CN CNA200580033394XA patent/CN101031805A/zh active Pending
- 2005-09-21 JP JP2006539221A patent/JPWO2006038468A1/ja active Pending
- 2005-09-21 WO PCT/JP2005/017415 patent/WO2006038468A1/ja active Application Filing
- 2005-09-21 US US11/663,963 patent/US20070296396A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5797458A (en) * | 1980-12-09 | 1982-06-17 | Yokogawa Hewlett Packard Ltd | Phase difference detector |
JP2000004123A (ja) * | 1998-06-17 | 2000-01-07 | Matsushita Electric Ind Co Ltd | 位相差演算回路 |
Also Published As
Publication number | Publication date |
---|---|
CN101031805A (zh) | 2007-09-05 |
JPWO2006038468A1 (ja) | 2008-05-15 |
US20070296396A1 (en) | 2007-12-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2006038468A1 (ja) | 位相差測定回路 | |
US5589788A (en) | Timing adjustment circuit | |
US6771202B2 (en) | Analog-to-digital conversion method and device | |
US8593171B2 (en) | Power supply monitor | |
CN103257569B (zh) | 时间测量电路、方法和系统 | |
EP2490336A1 (en) | Tracking analog-to-digital converter (ADC) with a self-controlled variable clock | |
KR101184137B1 (ko) | 클럭 변환 회로 및 이를 이용한 시험 장치 | |
CN108061848B (zh) | 基于fpga的加法进位链延时的测量方法及系统 | |
WO2009021186A1 (en) | Circuit device and method of measuring clock jitter | |
KR20070051329A (ko) | 위상 변이된 주기파형을 사용한 타임 측정 | |
CN110007154B (zh) | 数字测量电路和使用数字测量电路的存储器系统 | |
CN112534722A (zh) | 具有可选择分辨率的基于时间、电流受控的成对振荡器模数转换器 | |
US10886934B2 (en) | Time to digital converter and A/D conversion circuit | |
JP5268770B2 (ja) | 周波数測定回路 | |
JP3918777B2 (ja) | パルス幅変調回路 | |
US10972116B2 (en) | Time to digital converter and A/D conversion circuit | |
JP2010287860A (ja) | 半導体集積回路装置 | |
US20040114469A1 (en) | Multi-phase clock time stamping | |
US7746066B2 (en) | Position sensor | |
KR100576827B1 (ko) | 주파수 측정회로 및 이를 이용한 반도체 메모리 장치 | |
RU2260830C1 (ru) | Устройство для измерения интервала времени | |
JP3864583B2 (ja) | 可変遅延回路 | |
CN113315508A (zh) | 用于决定周期性输入信号的工作循环的方法及电路 | |
JP2008309756A (ja) | パルス幅測定方法および回路 | |
CN107317581B (zh) | 具有高分辨率的时间数字转换器 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV LY MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 11663963 Country of ref document: US Ref document number: 2006539221 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200580033394.X Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 05785931 Country of ref document: EP Kind code of ref document: A1 |
|
WWP | Wipo information: published in national office |
Ref document number: 11663963 Country of ref document: US |