JPH0611525A - Device for measuring frequency, device for measuring time interval and device for measuring data of pulse signal - Google Patents

Abstract

PURPOSE:To put a frequency lower than the resolution of a frequency calculating circuit within the range of the resolution by a method wherein an input signal is multiplied by a multiplier and then inputted to the calculating circuit. CONSTITUTION:When signals of frequencies (a) to (b) (a<b) are inputted to an RF input terminal 101, the input frequencies are converted into 2a to 2b by a multiplier 105. The frequency band of a frequency calculating circuit 103 is set to be (x) to (y) (x<y) and the signals of the frequencies 2a to 2b are shifted by a frequency converter 102 so that they may satisfy the following conditions: 2a+S>=x, 2b+S<=y, where S denotes the amount of shift. Then, the shifted frequencies are measured by the circuit 103. When the measured value is P, the true frequency F is expressed by F=(P-S)/2. When the frequency resolution of the circuit 103 is DELTAP, the true frequency resolution AF is expressed by DELTAF=dF/df=d/df.(P-S)/2=DELTAP/2. Accordingly, the frequency resolution is doubled in precision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frequency measuring device for measuring a carrier frequency of an input RF signal, a time interval measuring device used for communication equipment, and further pulse signal specifications used in the fields of radar devices and the like. The present invention relates to a measuring device.

[0002]

2. Description of the Related Art FIG. 14 shows, for example, IEEE PRO.
C. , Vol 129, Pt. F, No. 3, JUNE
1982 FIG. 16 is a block configuration diagram in which a part of the conventional frequency measurement device shown in FIG. 15 is simplified. In the figure, 101 is an RF input terminal and 102 is an RF input terminal 10.
A frequency converter 103 for receiving the RF signal input to the input terminal 1;
Is a frequency calculation circuit that receives the output of the frequency converter 102,
104 is an output terminal.

Next, the operation will be described. The RF signal input to the RF input terminal 101 is applied to the frequency converter 102 in the subsequent stage.
The frequency calculation circuit 103 shifts to a frequency that does not exceed the frequency band originally possessed by the frequency calculation circuit 103, and is then converted into frequency data by the frequency calculation circuit 103 and output to the output terminal 4.

For example, the RF input terminal 101 is now 10M
When an RF signal having a frequency of Hz is input, and the frequency band of the frequency calculation circuit 103 is 12 MHz to 1 MHz and the resolution is 1 MHz, the RF signal is the frequency converter 10.
Frequency calculation circuit 1 shifted to 12 MHz by 2
After being input to 03 and recognized as 12 MHz here, 2
MHz is subtracted and output as frequency data of 10 MHz to the output terminal 104.

By the way, when an RF signal of 10.8 MHz or the like is input, since the resolution of the frequency calculation circuit 103 is 1 MHz, this is discriminated as a signal of 10 MHz and accurate frequency data is obtained. I can't get it.

FIG. 15 is a functional block configuration diagram showing a conventional time interval measuring device. In the figure, 201 is an oscillating circuit, 202 is a reference time generating circuit for generating a reference time signal, 203 is a gate circuit, and 206. Is a gate control circuit for controlling the operation of the gate circuit 203 with the start signal input 204 and the stop signal input 205 as inputs, and 2
Reference numeral 07 is a counter for counting the counting pulses from the gate circuit 203.

Next, the operation will be described with reference to FIG. Based on the output signal of the oscillator circuit 201, a pulse (see FIG. 16 (d)) serving as a reference time signal is output from the reference time generation circuit 202 to the gate circuit 203. From the start signal input 204 and the stop signal input 205, the start signal (Fig. 16 (a)) and the stop signal (Fig.
6 (b)) is input to the gate control circuit 206 and converted into a gate opening / closing signal (FIG. 16 (c)). Further, the gate circuit 203 opens the gate of the gate circuit 203 and outputs a counting pulse to the counter 207 from the input of the start signal to the input of the stop signal by the gate opening / closing signal. The counter 207 counts this counting pulse (FIG. 16 (e)) and displays the input time interval from the input of the start signal to the input of the stop signal.

As described above, the time interval is measured by counting the number of pulses of the reference time signal, and the measurement resolution at that time is the period (1 / frequency) of the reference time signal.
Determined by

Further, FIG. 17 shows, for example, Japanese Patent Laid-Open No. 63-1.
4 is a configuration diagram showing a conventional pulse signal parameter measuring device disclosed in Japanese Patent No. 42282, in which 300 is a pulse signal parameter measuring device, 301 is an analog pulse signal or signal line, and 302 is an analog signal. Value pulse signal 3
An analog-to-digital conversion of 01 to output a pulse signal 303 of digital value, an A / D conversion circuit 304 determines whether a signal and an unnecessary signal (noise) are generated or not depending on whether or not the pulse signal 303 of digital value is larger than a certain value. A threshold detection circuit for separation, 305 is an output of the threshold detection circuit 304, a signal detection signal indicating that a signal has been detected, 306 is a section in which the signal detection signal 305 is output, and the maximum value of the pulse signal 303. A pulse amplitude measuring circuit for measuring the pulse width measuring circuit 307, a pulse width measuring circuit for measuring the interval between the portions where the signal detection signal 305 is output, and a portion where the pulse signal 303 falls by a specified value from the maximum value, 308 , In the section where the signal detection signal 305 is being output, in the portion where the specified value has dropped from the maximum value of the pulse signal 303. Pulse arrival time measuring circuit for measuring the arrival time of the end, 312, pulse amplitude value 309 which is the output of the measuring circuit, the pulse width value 310, by switching the pulse arrival time value 311 sequentially each pulse specification value 31
3 is a data transmission circuit for outputting as 3. Reference numeral 325 is an antenna for receiving the incoming analog-valued pulse signal 301. Further, 326 is a software system that receives the pulse specification value 313 and performs arithmetic processing on it.

Next, the operation will be described. Aerial line 325
The analog pulse signal 301 sent from
When input to the / D conversion circuit 302, analog / digital conversion is performed at regular time intervals, the analog value is converted into a digital value, and the pulse signal 303 having a digital value is output. The threshold detection circuit 304 detects signals and unnecessary signals (noise) based on the threshold level.
, And the signal detection signal 305 is output to the pulse amplitude measuring circuit 306, the pulse width measuring circuit 307, and the pulse arrival time measuring circuit 308, respectively, while the digital value pulse signal 303 is being output.

The pulse amplitude measuring circuit 306 measures the output section of the signal detection signal 305, the maximum value of the pulse signal 303 of digital value, and uses this to measure the pulse amplitude value 309.
Output as.

Further, the pulse width measuring circuit 307 measures the pulse interval between the output section of the signal detection signal 305 and the portion where the maximum value of the pulse signal 303 of the digital value has fallen by a specified value, and this is pulsed. Output as width value 310. Further, the pulse arrival time measuring circuit 308
Measures the arrival time of the front end of the output section of the signal detection signal 305, where the specified value has dropped from the maximum value of the digital pulse signal 303, and outputs this as the pulse arrival time 311.

The data transmission device 312 then outputs the pulse amplitude value 30 output from each of the measurement circuits 306 to 308.
9, the pulse width value 310 and the pulse arrival time value 311 are received, these are sequentially switched, and the pulse specification value 313 is output. Further, this pulse specification value 313 is input to the software system 326 for analysis. The pulse specifications of the analog-valued pulse signal 301 thus input are measured.

[0014]

The conventional frequency measuring device is constructed as described above, and the frequency resolution of the device depends on the resolution originally possessed by the frequency calculating circuit. In order to improve, it is necessary to increase the resolution of the frequency calculation circuit itself,
The frequency calculation circuit generally has a complicated structure, and there are problems that the resolution is further increased, the frequency calculation circuit becomes more complicated and larger, and the reliability is lowered.

Further, the conventional time interval measuring device is configured as described above, and it is necessary to increase the frequency of the reference time signal in order to increase the measurement resolution of the time interval. However, in order to obtain a resolution of several ns or less, the UHF to microwave band is used for the frequency of the reference time signal, which makes it difficult to realize the gate circuit and the counter, and also becomes expensive. There was a problem.

Further, since the conventional pulse signal parameter measuring device is constructed as described above, since the analog pulse signal is A / D converted and the pulse parameters are outputted, the respective circuits are closely arranged. It is necessary to install it, and inevitably the transmission distance of the pulse signal of analog value from the antenna to the pulse signal parameter measuring device becomes long, and there is a problem that it is inferior in noise resistance and reliability, which are the drawbacks of analog transmission. It was

Further, when the circuits constituting the pulse signal parameter measuring device are arranged close to the antenna side, the transmission distance of the pulse information to the software system becomes long, and the pulse information is transmitted due to the large amount of information. However, there is a problem in that the number of signal lines or the transmission time is increased.

The present invention has been made in order to solve the above problems, and frequency measurement capable of outputting frequency data with improved frequency resolution without improving the performance of the frequency calculation circuit itself. The purpose is to obtain the device. Another object of the present invention is to provide a time interval measuring device that is inexpensive and can easily obtain a resolution of several ns or less. Furthermore, while reducing the number of signal lines as much as possible,
It is an object of the present invention to obtain a pulse signal parameter measuring device capable of reliable signal transmission.

[0019]

The frequency measuring device according to the present invention is such that a multiplier is added in the preceding stage of the frequency calculating circuit.

The time interval measuring device according to the present invention comprises an integrator which operates at a time interval between two input signals,
An A / D converter for analog-digital converting the output of the integrator is provided, and the time interval is measured from the output of the A / D converter.

Further, in the pulse signal measuring device according to the present invention, signal transmission is digital signal transmission, and data having a large amount of information is measured at the transmission destination.

[0022]

In the frequency measuring device according to the present invention, the frequency of the input RF signal is multiplied by the multiplier, so that the frequency equal to or lower than the resolution of the frequency calculation circuit falls within the resolution range.

Further, the time interval measuring device according to the present invention uses an analog integrator to convert the time interval between two input signals into a voltage, and the A / D converter converts the voltage into time data. Therefore, the above time interval,
During that time, a constant voltage can be captured as the output of the integrator applied to the input, and the resolution can be improved by an easy method.

Further, since the pulse signal measuring device according to the present invention performs digital transmission, the data transmission is highly reliable, and since only the data having a small amount of information is measured and transmitted, the number of signal lines is small. Data transmission can be performed in a short time with a number.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. 1 is a circuit configuration diagram showing a frequency measuring device according to a first embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 14 designate the same or corresponding portions, and 105 denotes an input R
It is a doubler that doubles the frequency of the F signal, and more specifically, inductors 105a to 105d and diode 105.
e to 105h. Reference numeral 102 is a frequency converter which is basically the same as the conventional one, but the frequency after being multiplied by the doubler 105 is calculated by a frequency calculation circuit 103.
The shift amount is changed so as to be included in the frequency band of.

Next, the operation will be described with reference to FIG. It is well known that the doubler 105 outputs a frequency that is twice the input frequency, and therefore detailed description thereof is omitted here.

Now, the frequencies a to b are applied to the RF input terminal 101.
Consider a case where a signal of (a <b) is input. Multiplier 10
Since the multiplication factor of 5 is "2", the frequency of the input signal is converted into 2a to 2b by passing therethrough. Further, if the frequency band of the frequency calculation circuit 103 is x to y (x <y), the signals of the frequencies 2a to 2b are converted to the frequency converter 1
In 02, shift is performed so as to satisfy the condition of Expression (1). 2a + S ≧ x 2b + S ≦ y (where S is the shift amount) (1)

Next, the frequency of the input signal converted as described above is measured by the frequency calculation circuit 103. If the measured frequency data is P, the true frequency F is expressed by F = (P−S) / 2 (2). If the frequency resolution of the frequency calculation circuit 103 is ΔP, the true frequency resolution ΔF is

[0029]

[Equation 1]

That is, the frequency resolution becomes twice as fine.

For example, the frequency a = 10.
8 MHz and the frequency band of the frequency calculation circuit 103 is 2
If the frequency is 5 MHz and the resolution is 1 MHz, the doubler 10
5, the frequency is multiplied by 21.6 MHz, and the frequency converter 102 shifts the frequency by, for example, 10 MHz.
It was recognized as an RF signal of 31MHz in 3 and 1
After subtracting 0MHz, it is halved to 10.5MHz
Is output to the output terminal 104.

As described above, according to this embodiment, since the frequency doubler 105 is provided in the preceding stage of the frequency calculating circuit 103, the frequency equal to or lower than the resolution of the frequency calculating circuit 103 is doubled.
It becomes a signal of a frequency that can be identified by the resolution of the frequency calculation circuit 103, and the frequency data of the RF input signal can be calculated in more detail by dividing it by the multiplication factor (here, 2) of the multiplier 105. It is possible to obtain frequency data with improved resolution without improving the resolution of the circuit 103 itself.

Example 2. FIG. 3 is a block diagram showing a frequency measuring device according to a second embodiment of the present invention. In this embodiment, a multiplier is constituted by an amplifier and a filter instead of the doubler. In the figure, 1
Reference numeral 06 is an amplifier, and 107 is a filter arranged in the latter stage of the amplifier 106.

Next, the operation will be described. Generally, an amplifier amplifies an input signal, but it is well known that not only a signal having the same frequency as the input signal is output, but also a frequency that is twice or three times the frequency of the input signal is output at the same time. is there. Therefore, a filter 1 that passes only the second harmonic wave or the third harmonic wave after the amplifier 106 is provided.
No. 07 is provided, and the shift amount of the frequency converter 102 is changed so that the obtained doubled or tripled wave is included in the frequency band of the frequency calculation circuit 3.
When the 2nd harmonic is taken out in step 7, the frequency resolution is doubled, and when the 3rd harmonic is taken out, the frequency resolution is set to 3
It can be doubled.

Example 3. FIG. 4 is a block diagram showing a frequency measuring device according to a third embodiment of the present invention. In this embodiment, another frequency doubler is provided in series in the first embodiment so that the frequency resolution is increased. Is improved four times. In the figure, reference numeral 108 is a doubler connected between the doubler 105 and the frequency converter 2, and the configuration is the same as that of the doubler 105.

Next, the operation will be described. Since the frequency of the input RF signal that has passed through the two-stage doubler 105, 108 is four times, the frequency of the fourth harmonic wave is converted by the frequency converter 102 so as to be included in the frequency band of the frequency calculation circuit 103. By shifting, the frequency resolution can be improved four times.

Although the double multiplier is used as the multiplier in the first and third embodiments, a multiplier such as a triple multiplier or a triple multiplier may be used. Further, although the multiplier is connected in two stages in the third embodiment, the number of connected stages of the multiplier is not limited to this, and multipliers having different magnifications may be combined.

Example 4. FIG. 5 is a circuit diagram showing a time interval measuring device according to a fourth embodiment of the present invention. In FIG. 5, the same reference numerals as those in FIG. 15 denote the same or corresponding parts.
Reference numeral 08 is a DC power source that generates a voltage of -V [V], and 209 is a switch that connects and disconnects the DC power source and the analog integrator 210. The analog integrator 210 is composed of an operational amplifier 210a, a resistor 210b, and a capacitor 210c. Reference numeral 211 is a switch for resetting the output of the analog integrator 210, 212 is an A / D converter for analog-digital converting the output of the analog integrator 210, 213 is time data output, and 214 is switches 209, 211 and It is a control circuit that controls the A / D converter 212.

Next, the operation will be described with reference to FIG. The start and stop signals A and B from the start and stop signal inputs 204 and 205 are input to the switch control circuit 21.
At 4, it is converted into a control signal C for the switch 209. The switch 209 is turned on (connected state) from the start signal to the stop signal by the control signal C. During this time, −
The voltage of V [V] passes through the switch 209 and the integrator 210
A constant current, which is input to the capacitor 210c and is determined by the resistor 210a, charges the capacitor 210c. At this time, the output signal of the integrator 210 is a voltage that increases with a certain slope with respect to time, as indicated by D in FIG.

At the same time when the stop signal B is input, the switch 209 is turned off (disconnected state), and the integrator 210
The increase of the output power of is stopped and the voltage is maintained. At the same time, the A / D converter 212 operates in response to a change in the control signal E from the control circuit 214, and the output voltage of the integrator 210 is analog-digital converted and output as time data 213. At this time, the output voltage of the integrator 210 becomes a voltage proportional to the time interval between the start signal A and the stop signal B. Therefore, the time interval between the two input signals should be measured by A / D converting this voltage. You can A
After the D / D conversion, the integrator 21 output from the control circuit 214
The switch 211 is controlled by the 0 output reset signal (F in the figure) to reset the output voltage of the integrator 210 in the voltage holding state and wait for the next start / stop signal.

Here, the measurement resolution of the time interval is determined by the voltage change at the output of the integrator 210 with respect to time and the minimum resolvable voltage (LSB) of the A / D converter 212. That is, even if the voltage change of the integrator 210 is configured by general-purpose components, it is from several tens [V / μs] to several 100.
Since the response of [V / μs] can be easily obtained, it can be sufficiently converted into the voltage change of the minimum resolvable voltage of the A / D converter 212 or more even in the time of several ns or less. This makes it possible to easily set the measurement resolution of the time interval to several ns or less.

As described above, according to this embodiment, the analog integrator 210 is operated to extract a voltage between the input of the start signal A and the input of the stop signal B, and the voltage is extracted and A / D converted. Since the time data is obtained by inputting the start signal A to the stop signal B,
The time until is input is regarded as a continuous analog amount, and the time interval can be measured with a resolution of several ns or less with a simple configuration without using a signal in a high frequency band.

Example 5. FIG. 7 is a circuit diagram showing a time interval measuring device according to a fifth embodiment of the present invention. In the fourth embodiment, a circuit applicable when the time interval between the start and stop signals is short and the output voltage of the integrator is less than or equal to the maximum input voltage of the A / D converter is shown. The time interval of the stop signal is long, and it can be applied even when the output voltage of the integrator is equal to or higher than the maximum input voltage of the A / D converter. In the figure, reference numeral 215 denotes a DC power supply having the same value as the maximum input power Vmax [V] of the A / D converter 212, which serves as a reference voltage for the comparator 216. Further, the output of the integrator 210 is input to the comparator 216 as a comparison voltage.
Reference numeral 217 is a pulse counter for counting the output pulses of the comparator 216, and 218 is the Vmax detection frequency data output. Further, 219 is an OR circuit to which the integrator output reset signal F of the control circuit 214 and the output of the integrator 210 are input as the integrator output reset signal G,
The output controls the switch 211.

Next, the operation will be described with reference to FIG. The start signal A causes the output of the integrator 210 to become a voltage that increases at a constant slope, as indicated by D. When the output voltage of the integrator 210 reaches the maximum output voltage Vmax of the A / D converter 212, the voltage is detected by the voltage comparison comparator 216, the integrator output reset signal G is output, and the signal is output via the OR circuit 219. Then, the switch 211 is turned on (connected state) to reset the output of the integrator 210. Then, the integrator 210 returns to the initial state, outputs the voltage that increases with a constant slope again, and repeats the above operation until the stop signal B is input. At this time, the pulse counter 217 counts the number of outputs of the integrator output reset signal G which is the output of the comparator 216, and outputs it as Vmax detection number data 218. Since the operation after the stop signal B is input is the same as that of the fourth embodiment, it is omitted here.

With this configuration, even in the case of a long time interval, from the Vmax detection frequency data and the time data,
The time interval between the start and stop signals can be measured with the same resolution as in the above-mentioned embodiment.

Example 6. FIG. 9 is a circuit diagram showing a time interval measuring device according to a sixth embodiment of the present invention. In the above-mentioned fourth and fifth embodiments, the case where the order of inputting the start and stop signals is fixed has been described. However, in this embodiment, it can be applied even when the order of the input signals is indefinite. is there. That is, 220 is A in FIG.
The first control circuit 221 that generates the switch control signal C when the input is earlier than the B input in time generates the switch control signal C when the B input is earlier than the A input. A second control circuit, 222 to 224 are OR circuits that receive the output signals of the first and second control circuits 220 and 221 as inputs, and 225 is an input sequence determination circuit of A and B inputs,
226 is an input order determination data output.

Next, the operation will be described with reference to FIG. When the B input is performed after the A input, the switch control signal C is output by the first control circuit 220, and the data according to the time interval is output. On the other hand, when A input is performed after B input, the switch control signal C is output by the second control circuit 221 and data corresponding to the time interval is output. In this way, the same resolution as in the fourth and fifth embodiments is obtained, and the input order can be determined by the input order determination circuit 25 when the A and B signals are input, and the input order can be determined in any order. The time between two input signals can be measured.

Example 7. FIG. 11 is a block diagram showing a pulse signal parameter measuring device according to a seventh embodiment of the present invention, in which the same reference numerals as those in FIG. 17 denote the same or corresponding parts,
Reference numeral 327 is a pulse signal parameter measurement device, and 314 is a data transmission circuit that sequentially switches the pulse amplitude value 309 and the pulse width value 310 output from the pulse amplitude measurement circuit 306 and the pulse width measurement circuit 307 and transmits as transmission data 315. Is. A data reception circuit 316 receives the transmission data 315 and outputs it as pulse amplitude / pulse width data 317. 318 is a pulse arrival time measuring circuit for measuring the arrival time of the signal detection signal 305, 311 is a pulse arrival time value output from the pulse arrival time measuring circuit 305, 319 is the pulse arrival time signal 311 and the pulse amplitude / pulse width data. 317 and pulse information 3
13 is a data synthesizing circuit for outputting as 13.

Next, the operation will be described. Aerial line 325
The analog pulse signal 301 sent from
When input to the D conversion circuit 302, analog / digital conversion is performed at fixed time intervals, the analog value is converted into a digital value, and the pulse signal 303 having a digital value is output. Next, the threshold detection circuit 304
Separates a signal from an unnecessary signal (noise) based on the threshold level, and outputs a signal detection signal 305 from the pulse signal 303 having a digital value.

The pulse amplitude measuring circuit 306 arranged in the subsequent stage measures the output section of the signal detection signal 305, the maximum value of the digital pulse signal 303, and outputs it as the pulse amplitude value 309. Further, the pulse width measuring circuit 307 measures the output section of the signal detection signal 305, the interval between points where the digital value of the pulse signal 303 has fallen by a prescribed value from the maximum value, and outputs this as a pulse width value 310. .

The data transmission circuit 314 receives the pulse amplitude value 309 and the pulse width value 310 which are the outputs of the measurement circuits 306 and 307, and sequentially switches them to transmit the transmission data 315 to the data reception circuit 316 in the subsequent stage. To do. The data receiving circuit 316 receives this transmission data 315 and outputs it as pulse amplitude / pulse width data 317. In the above configuration, the pulse amplitude measuring circuit 306 and the pulse width measuring circuit 307 which handle data having a relatively small amount of information are arranged in the vicinity of the A / D converter 302, and the respective processing results are transmitted via the data transmitting circuit 314 to the data transmitting circuit 314. Data receiving circuit 31 arranged near the combining circuit 319
6 is transmitted.

On the other hand, the pulse arrival time measuring circuit 318 measures the arrival time of the signal detection signal 305 and outputs a pulse arrival time value 311. This pulse arrival time measuring circuit 31
8 is arranged in the vicinity of the data synthesizing circuit 319, and the pulse arrival time value 311 having a relatively large amount of information is measured here.

Then, the data synthesizing circuit 319 receives the pulse arrival time value 311 and the pulse amplitude / pulse width data 3
17 are combined and output as pulse information 313. After that, the pulse information 313 is analyzed by the software system 326. As described above, the analog-valued pulse signal 301 received by the antenna 326 is transmitted to the pulse signal parameter measuring device 327 at a short distance, and a pulse is generated at a distance from the antenna 325 without causing an increase in signal wiring. Information 313 can be obtained.

As described above, according to this embodiment, the pulse amplitude value 309 and the pulse width value 310 having a relatively small amount of information are
Pulse amplitude measuring circuit 30 arranged near antenna 325
6 and the pulse width measuring circuit 307, and the data transmitting circuit 314 is used to determine these values.
While transmitting to the data receiving circuit 316 arranged in the vicinity, the pulse arrival time value 311 having a relatively large amount of information is judged by the pulse arrival time measuring circuit 318 arranged in the vicinity of the data synthesizing circuit 319. It is possible to arrange the respective circuits constituting the signal specification measuring device 327 so as to be separated from each other, thereby reducing the number of signal lines and improving the reliability of data transmission.
The transmission time can be shortened.

Example 8. FIG. 12 is a block diagram showing a pulse signal parameter measuring device according to the eighth embodiment of the present invention. In the seventh embodiment, only the pulse arrival time value 311 is determined as the information amount from the signal detection signal 305 is relatively large, but in this embodiment, the information amount other than the pulse arrival time value 311 is relatively large. The pulse interval value is obtained as a large number.

That is, in FIG. 12, reference numeral 328 is a pulse signal parameter measuring device, which has a pulse arrival time measuring circuit 31.
A pulse interval measuring circuit 320 is arranged near 8
The pulse interval measuring circuit 320 measures the arrival interval of the signal detection signal 305 and outputs it as a pulse interval value 321. Then, the data synthesizing circuit 319 synthesizes the pulse interval value 321, the pulse arrival time value 311, and the pulse amplitude / pulse width data 317, and the pulse information 313.
Output as. From the above, the pulse interval of the input pulse,
The pulse arrival time, pulse amplitude and pulse width can be measured.

Example 9. FIG. 13 is a block diagram showing a pulse signal parameter measuring device according to the ninth embodiment of the present invention. In the seventh and eighth embodiments, the transmission data between the data transmission circuit and the data reception circuit is transmitted by parallel transmission, but in this embodiment, the transmission data is transmitted by serial transmission.

That is, in FIG. 13, reference numeral 329 is a pulse signal parameter measuring device, and the output of the data transmission circuit 314 is a parallel / serial conversion circuit 32 arranged near the circuit.
2 and serial / disposed in the vicinity of the data synthesis circuit 313.
It is configured so as to be input to the data synthesizing circuit 319 via the parallel conversion circuit 323.

Next, the operation will be described. The data transmission circuit 314 outputs the pulse amplitude value 309 and the pulse width value 310 as transmission data 315 in parallel. And parallel /
The serial conversion circuit 322 converts the transmission data 315 from parallel to serial, and outputs it as serial transmission data 324. The serial / parallel conversion circuit 323 uses the serial transmission data 324.
Is again converted into parallel data and output as pulse amplitude / pulse width data 317.

With the above configuration, the number of signal lines used for the output of the data transmission circuit 314 can be reduced.

[0061]

As described above, according to the frequency measuring device of the present invention, since the frequency of the input signal is multiplied by the multiplier to be input to the frequency calculating circuit, the performance of the frequency calculating circuit is improved. There is an effect that the frequency measurement with a better resolution can be performed with a simple configuration without changing the.

Further, according to the time interval measuring device of the present invention, since the time interval between two input signals is converted into a voltage and measured by using the integrator, the time interval with low cost and high resolution is obtained. There is an effect that a measuring device can be obtained.

Further, according to the pulse signal parameter measuring device of the present invention, the signal transmission is digital transmission, and the data having a large amount of information is measured at the transmission destination, so that the reliability of the data transmission is improved. In addition, the number of signal lines and the transmission time can be shortened.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a frequency measuring device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the frequency measuring device according to the above embodiment.

FIG. 3 is a configuration diagram of a frequency measuring device according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a frequency measuring device according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram of a time interval measuring device according to a fourth embodiment of the present invention.

FIG. 6 is an operation waveform diagram of the time interval measuring device according to the above embodiment.

FIG. 7 is a configuration diagram of a time interval measuring device according to a fifth embodiment of the present invention.

FIG. 8 is an operation waveform diagram of the time interval measuring device according to the above-described embodiment.

FIG. 9 is a configuration diagram of a time interval measuring device according to a sixth embodiment of the present invention.

FIG. 10 is an operation waveform diagram of the time interval measuring device according to the above embodiment.

FIG. 11 is a block configuration diagram of a pulse signal parameter measuring device according to a seventh embodiment of the present invention.

FIG. 12 is a block configuration diagram of a pulse signal parameter measuring device according to an eighth embodiment of the present invention.

FIG. 13 is a block configuration diagram of a pulse signal parameter measuring device according to a ninth embodiment of the present invention.

FIG. 14 is a configuration diagram of a conventional frequency measuring device.

FIG. 15 is a block diagram of a conventional time interval measuring device.

FIG. 16 is an operation waveform diagram of the time interval measuring device.

FIG. 17 is a block configuration diagram of a conventional pulse signal parameter measuring device.

[Explanation of symbols]

 101 RF input terminal 102 Frequency converter 103 Frequency calculation circuit 104 Output terminal 105 Doubler 106 Amplifier 107 Filter 108 Doubler 204 Start signal input 205 Stop signal input 208 DC power supply 209 Switch 210 Integrator 210a Operation amplifier 210b Resistance 210c Capacitor 211 switch 212 A / D converter 213 time data output 214 control circuit 215 DC power supply 216 comparator 217 pulse counter 218 Vmax detection count data output 219 OR circuit 220 first control circuit 221 second control circuit 222 to 224 OR circuit 225 Input sequence determination circuit 226 Input sequence determination data output 301 Analog value pulse signal 302 A / D conversion circuit 303 Digital value pulse signal 304 Threshold detection circuit 305 Signal detection signal 306 Pulse amplitude measurement circuit 307 Pulse width measurement circuit 309 Pulse amplitude value 310 Pulse width value 311 Pulse arrival time value 313 Pulse information 314 Data transmission circuit 315 Transmission data 316 Data reception circuit 317 Pulse amplitude / pulse Width data 318 Pulse arrival time measuring circuit 319 Data synthesizing circuit 320 Pulse interval measuring circuit 321 Pulse interval value 325 Antenna 326 Software system 327 Pulse signal parameter measuring device 328 Pulse signal parameter measuring device 329 Pulse signal parameter measuring device

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location // G01S 7/38 8940-5J

Claims (10)

[Claims] 1. A frequency measuring device for calculating the frequency of an input signal, comprising: a multiplier for multiplying and outputting the frequency of the input signal; and a frequency calculating circuit for measuring the frequency of the input signal. A frequency measuring device characterized in that it is configured to input a multiplied input signal to the frequency calculating circuit. 2. The frequency measuring device according to claim 1, wherein a plurality of stages of the multipliers are connected in series. 3. A frequency measuring device for calculating the frequency of an input signal, an amplifier for amplifying the frequency of the input signal, a filter circuit for selectively extracting a signal of a desired frequency from the output of the amplifier, and a frequency of the input signal. And a frequency calculation circuit for performing the above measurement, and the signal extracted by the filter circuit is input to the frequency calculation circuit. 4. A time interval measuring device for measuring a time interval between two input signals input at different timings, the analog operating in a period from the input of the first signal to the input of the next signal. An integrator, and A / which converts the output of the analog integrator into a digital value
A time interval measuring device comprising a D converter, and A / D converting the voltage of the analog integrator obtained in the input time interval of the two input signals to measure the time interval. . 5. The time interval measuring device according to claim 4, wherein a maximum value detector that detects a maximum value of the integrator output and outputs a detection signal, and an operation of the analog integrator that receives the detection output. And a counter for counting the number of output times of the detection signal output from the maximum value detector, which is provided in the period from the input of the first signal to the input of the next signal. A time interval measuring device for measuring the time interval between the two input signals from the relationship between the number of times of charging and discharging of the analog integrator and the time of charging and discharging once. 6. The time interval measuring device according to claim 4, wherein two kinds of signals having different pulse periods are used as the two input signals, and a signal judgment circuit for judging the kind of the inputted signal is provided. A time interval measuring device characterized in that 7. A pulse signal parameter measuring device for measuring parameters of a pulse signal having an input analog value, wherein an A / D converter for converting the pulse signal into a digital value and the digital value is converted into the digital value. A first measuring circuit for measuring a signal specification value having a small amount of information from a pulse signal; a second measuring circuit measuring a signal specification value having a large amount of information from the pulse signal converted into the digital value; A transmitter circuit for transmitting the output of the first measurement circuit, a receiver circuit for receiving the output of the transmitter circuit, and a synthesizer circuit for receiving the output of the receiver circuit and the output of the second measurement circuit, and synthesizing and outputting the outputs. An apparatus for measuring pulse signal specifications, comprising: 8. The pulse signal parameter measuring device according to claim 7, wherein a parallel / series conversion circuit for converting the output of the transmission circuit into serial data and a output of the parallel / series conversion circuit are provided at a subsequent stage of the transmission circuit. And a serial / parallel conversion circuit for converting the serial data into parallel data. 9. The pulse signal parameter measuring device according to claim 7, wherein the first measuring circuit measures a pulse amplitude value and a pulse width value as signal parameter values having a small amount of information, The pulse signal parameter measuring device is characterized in that the second measuring circuit measures a pulse arrival time value as a signal parameter value having a large amount of information. 10. The pulse signal parameter measuring device according to claim 9, wherein the second measuring circuit measures a pulse arrival interval value in addition to the pulse arrival time value as a signal parameter value having a large amount of information. A pulse signal parameter measuring device characterized in that