JPS58165437A - Phase pulse signal amplifier - Google Patents

Abstract

PURPOSE:To prevent the interference of an original phase pulse signal and an amplified phase pulse signal at a reception side, by setting the upper limit level to a level so that both phase pulse signals are not interfered at the reception side, in the transmission using a distribution line or an exclusive line. CONSTITUTION:A comparator 10 performs comparison that a reception signal level is smaller than a level interfered at the reception side, that is, smaller than the upper limit level L8 in Figure, the result is given to a signal discrimination circuit 11, where a pulse signal 2 is generated through discrimination, and a mask signal 3 for a time t1 and a trigger signal 4 delayed by a short time t2 from the trailing of the pulse signal 2 are produced. The time t2 is a time to synchronize the phases of the original phase pulse signal 1 and the amplified phase pulse signal. The trigger signal 4 is given to a signal injection circuit 13 from a terminal 12 to transmit the amplified phase pulse signal having the same level as the transmission side and to inject the amplified phase pulse signal to the distribution line.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a phase pulse signal that compensates for the attenuation of the signal between the transmitting side and the receiving side due to the load (such as the distribution line) in the transmission of a phase pulse signal using a power distribution line or a dedicated line. It relates to signal amplifiers.

When transmitting phase pulse signals via power distribution lines,
Due to the load, the signal becomes thick (there is attenuation), which makes it impossible to obtain a sufficient signal/noise/N ratio, and the signal may not be transmitted accurately.

The first @l is a signal level diagram showing the relationship between the height of the signal levels on the transmitting side and the receiving side and the distance between the transmitting side and the receiving side. The phase pulse signal transmitted at the signal level Ll from the transmitting point aS is attenuated by the signal level depletion kK, and is received at the receiving point R at the signal level L8,
In this case, the phase pulse signal is received accurately because [(1 and L) is greater than the noise level Ln.

However, depending on the transmission characteristics of the distribution line, the attenuation may be large as shown in signal level attenuation straight line B. In this case,
The phase Hals signal transmitted at the signal level L is received at the receiving side point R at the signal level Ls, and the signal level L
Since s is smaller than the noise level Ln, accurate reception is not possible. In order to solve this problem, it has been conventionally proposed to provide a phase pulse signal amplifier as shown in FIG. 2 at a relay point TK between the transmission HS point and the reception 11R point. When the phase pulse signal amplifier detects the phase pulse signal transmitted at the signal level L and attenuated to the signal level L4 at the relay point T, the phase pulse signal amplifier transmits a new phase pulse signal at the signal level L1 (hereinafter referred to as the amplified phase pulse signal) to the power distribution @. inject.

According to this sum, at the receiving side point R, is the sending @ point S? The phase pulse signal sent from the source (hereinafter referred to as the original phase pulse signal).

Since the signal level L1 is above the noise level and below the noise level, it cannot be received accurately.
The amplified phase pulse signal from the phase pulse signal amplifier is transmitted to the receiving side point R along the signal level attenuation straight line C, and is received at a signal level L greater than the noise level Ln. Therefore, the phase pulse signal at the relay point T has a signal level of L.
This means that the signal is amplified from , to the signal level L, and reception with a high ratio is possible at point R on the receiving side. However,
As shown in the signal level attenuation straight line A of #1 #A, the one-phase pulse signal amplifier (even without further amplification, the signal received at the signal level L2, which is higher than the noise level at the receiving side R point, is When amplified by a pulse signal amplifier, not only is there no effect of amplification, but the S
The original phase pulse signal from the point and the increased phase pulse signal from the phase pulse signal amplifier interfere and meet, 8/p4 jt
There is a disadvantage that the value decreases.

OBJECTS OF THE INVENTION 1. A phase pulse signal capable of eliminating the above-mentioned drawbacks and preventing interference between the original phase pulse signal and the amplified phase pulse signal 5"i':1" on the receiving side. increase a
It is to provide S.

To achieve this objective, the present invention comprises: signal detection means for detecting a phase pulse signal; comparison means for comparing the signal level of the phase pulse signal with a lower limit level and an upper limit level;
When the signal/level of the phase pulse signal is between the lower limit level and the upper limit level (in some cases, the signal discrimination means operates the signal injection means and the mask means, the signal injection means transmits the phase pulse signal, and the signal detection means and a masking means for stopping the operation of either one of the noise level and the comparison means, the noise level is set to be above the lower limit level, and the upper limit level is set to the original phase pulse signal transmitted from the transmitting side and the phase pulse signal amplifier. 1# mold is set to a level that does not cause interference on the receiving side with the amplified phase pulse signal injected from the receiver.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

Figure 3 is a signal level diagram for explaining the operation of the phase pulse signal amplifier of the present invention. In the conventional phase pulse signal amplifier, even if the signal level Lm at the receiving point IIIR is only slightly lower than the signal level L at the transmitting side point S, the signal level L1 at the relay point T, as shown in FIG. An amplified phase pulse signal of
becomes. For this reason, the difference in level between the original phase pulse signal and the amplified phase pulse signal at the receiver 111R,a becomes small, causing interference between the two signals, reducing the ratio at the receiving side KIFL, and making accurate reception impossible. Become. In order to solve the above-mentioned problems, the phase pulse signal amplifier of the present invention has a lower limit level L1 and a signal level #! according to the signal level extinction ratio mEK. φ operates when the received signal level of the original phase pulse signal is between the upper limit level Lm according to the decay rate @F. The lower limit level L1 is set to a predetermined value equal to or higher than the noise level, and the upper limit level L is set to a level at which the original phase pulse signal and the amplified phase pulse signal do not cause interference on the receiving side, for example, the signal level. 1. , f), etc.

When the phase pulse signal amplifier detects a phase pulse signal with a signal level higher than the lower limit level L1, the amplified phase pulse signal with the signal level L1 is injected into the distribution line at the relay point T.
The signal level is attenuated directly mGK and is therefore transmitted to the receiving side R point,
It is received at signal level L9. Signal level attenuation direct-Fv
When the phase pulse signal amplifier detects the phase pulse signal according to c, the phase pulse signal amplifier does not perform the injection operation, and only the phase pulse signal reaches the receiving side at signal level L&
・Received at

Next, a method of receiving the phase pulse signal will be explained with reference to FIG. First, the phase pulse signal on the distribution line is separated by a signal detection circuit, and its waveform becomes 1 out of 4. When this is sliced from the lower limit level LtIIc, which is determined by a predetermined value KW and which is higher than the noise level at the relay point 'r, a pulse signal 2 as shown in Fig. 4 is generated. This pa'':.

111411 (CIC, □ indicates 'wx
3, which masks the input 1 t1 period of the increased phase pulse signal generated by the phase-curse signal amplifier itself. This prevents interference caused by the input of the oscillation signal of the phase pulse signal amplifier itself. Next, the pulse signal 2 generates a trigger signal 4 as shown in Figure 4 (B), and this causes the amplified phase pulse signal 5 emitted by the phase pulse signal amplifier such as a balanced water The phase is synchronized with the pulse signal l.This can minimize the interference between the signal from the transmitting side and the signal emitted by the phase pulse signal amplifier.If the phase is not synchronized here, the result shown in Fig. 5 As shown in Fig. 5, the phase pulse signal l from the transmitting side and the amplified phase pulse signal 5 transmitted by the phase pulse signal amplifier are combined, and the signal level not only does not become large enough, but also becomes a complex waveform. It is not possible to send signals accurately.

The above is a method of detecting and transmitting a phase pulse signal -;:1 at the lower limit level L1 set to minus IIIK.
゛"CA"C? C-2・-ct, "cy:>"1
It is also possible to detect and transmit the signal at the lower limit level L, which is lower than 1.3. The upper limit level Lm is the level at the relay point TK that is the limit immediately before the state phase pulse signal l and the amplified phase pulse signal 5 cause interference on the receiving side, and when a signal exceeding this level is received, , and the trigger signal 4 is summed to prevent the occurrence of interference.

FIG. 816 shows the internal configuration of the phase pulse signal amplifier, and FIG. 7 shows its operation. Power distribution * The phase pulse signal input from the connection terminal 6 passes through the AND gate 7,
It is separated from the commercial frequency voltage by the signal detection circuit 81C and becomes a phase pulse signal as shown in 1 in FIG.
input into the comparison llR1510. In comparator 9,
A comparison is made in which the received signal level is higher than the lower limit level L1 in FIG. 7, and in the comparator 10C, the received signal level is lower than the level that causes interference in reception @, that is, the upper limit level L in FIG. , are smaller than each other, and these enter the signal discrimination circuit 1lIlc, where they are discriminated and generate a pulse signal 2, which is added to the mask signal 3 and the rise of the pulse signal 2 during time tt1. A trigger signal 4 is generated which is delayed by a short time t from the downlink. Here, the time t is a time for phase-synchronizing the phase pulse signal 1 and the amplified phase pulse signal 5. The trigger signal 4 enters the signal injection circuit 13 from the terminal 12, and synchronously transmits an amplified phase pulse signal 5 having the same level as the transmitting side, thereby injecting the amplified phase pulse signal 5 into the power distribution line. Also, mask signal 3 is connected to terminal 1.
From 4 to 15 to 15 to anime game-') 7 [transfer j
Then, this circuit is closed and the operation after the signal detection circuit 8 is prohibited for a certain period of time, thereby preventing the control operation of the phase pulse signal amplifier itself. Note that the AND gate 7 is used for signal discrimination - path ll
The same effect can be obtained even if it is placed before. The AND gate 7 and the inverter 15 correspond to the mask means of the present invention.

As explained above, according to the present invention, when the signal level of the phase pulse signal transmitted from the transmitting side is between the lower limit level and the upper limit level, the amplified phase pulse signal is injected. >Y noise level or higher, and the level is set at a level that does not cause interference between the phase pulse signal at the upper limit level and the amplified phase pulse signal on the receiving side, thus preventing interference between both phase pulse signals on the receiving side. I can do it.

[Brief explanation of the drawing]

11a is a signal level diagram showing the relationship between the height of the signal level on the transmitting side and the receiving side and the distance between the transmitting side and the receiving side. Figure 2 shows a conventional phase pulse signal amplifier installed between the transmitting side and the receiving side. Signal level diagram when
4 is a signal level diagram for explaining the operation of the phase pulse signal amplifier of the present invention, and FIG. 4 is a waveform diagram for explaining the method for receiving and preparing the phase pulse signal according to the present invention.
Fig. 5 is a signal waveform diagram when the transmitting side signal and the signal transmitted by the phase pulse signal amplifier are not synchronized, and Fig. 6 is a block diagram showing an embodiment of the present invention. 1 is a waveform diagram showing the operation. 1, L,・Lower limit level, L@Medium・Φ upper limit level, Ki,・
to Ln --- Noise level 1.・11... state phase pulse signal, 2... pulse signal, 3... mask signal,
4...Trigger signal, 5...Amplified phase pulse signal, 7
Fist...and gate, 8...signal detection circuit, 9.10
... Comparator, 11 ... Signal discrimination circuit, 13 ... Signal injection circuit, 15 ... Inverter. Patent issuer Minoru Mura \ ・（・・、■ ;. Fang 1 figure 72 figure' 3ffi -j □ distance ll 1 l L Motoshin's side 4 figure 5 figure

Claims (1)

[Claims] 1. In a phase pulse signal amplifier that is provided between the transmitting side and the receiving side of the phase pulse signal and compensates for the attenuation of the phase pulse signal, a signal detection means for detecting the phase pulse signal and a signal level of the phase pulse signal are set to a lower limit. a comparison means for comparing the level and the upper limit level; a signal discrimination means for rotating the signal injection means and the masking means when the signal level of the phase pulse signal is between the lower limit level and the upper limit level; and a signal for transmitting the phase pulse signal. and a masking means for stopping the crop rotation of either the signal detection means or the comparison means for a predetermined period of time, the lower limit level is set to be higher than the noise level, and the upper limit level is set to the signal transmitted from the transmitting side. A phase pulse signal amplifier characterized in that the original phase pulse signal and the amplified phase pulse signal injected from the phase pulse signal amplifier are set at a level such that no interference occurs on the receiving side.