JPS60150341A - Fault recognition circuit - Google Patents

Abstract

PURPOSE:To detect easily a fault of a circuit from which a burst form signal is transmitted with simple circuit constitution as well by detecting the fault with an exclusive OR between an input signal and an output signal of a transmission circuit. CONSTITUTION:An intermediate frequency band directional coupler 10, a diode detector 11 and a DC amplifier 12 are fitted to an output section (or an input section of a transmission frequency converter) and a comparator 13 is connected to them so as to obtain a rectangular wave in response to an input burst signal, and a similar comparator 17 is fitted to a signal detection circuit at the output side of a transmitter, both the rectangular wave signals are ORed exclusively by an exclusive OR circuit 5 so as to detect a fault of a device (in this case, a transmission frequency converter 2 and a power amplifier 2) independently of the presence of a signal.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to TDMA (Time Division)
The transmission device (transmission frequency converter, ``city power increase @ equipment increase'') that transmits burst-like signals such as transmission for multiple acceee is normal.

Regarding the circuit for detecting illegal hunting ll1I production (σ)
It is.

[Prior art]

In recent years, with the adoption of time division multiple access (TDMA), etc., in molecular fVc such as satellite communication, transmission is frequency converted fj'fr. New technologies are also required for detection. Conventional FDM in 11%
An example of a failure detection circuit in the FM system is shown. The signal from the modulator (1) in the figure is input to the frequency converter (2), and after frequency conversion, it passes through the power amplifier (3) and is then sent to the antenna device (41). As a method for completely detecting whether or not the transmitter J8) is correctly transmitting one word in the VC device, the transmitter 1g is shown in the same figure.
Is all directional coupler (5) used for the machine output, and some of the output is used? The output level is 1111 permissible using the window comparator '81'Gk after the DC amplifier (7) is connected.
There is a method to detect all abnormalities in device a. Now, in the conventional FDM-FM system, the r output is always at the -1 level, so I don't want to use this method! It's possible to get out of there.V(L).

Send the same circuit (a)fg If the output part l/c of the 8-wave number converter (2) is not corrected, send the abnormality of the ``8-wave number converter (2)''2'fe
-Can be detected.

However, in such a method, when the transmission output sound is 0N10FT1'' in the so-called /first mode, the output level is constant and the level is approximately A. 17f does not function as K failure detection same prefecture.Moreover, TT) MA's: ++'l
In the LE system, the transmission I burst length 2 interval and contention are not necessarily constant, and many types of parse h 1M can be transmitted 1g, so the average output is within the same range when the upper ie open circuit is used. Even if it were to be detected by force, it would not function satisfactorily.

[Outline of invention cost]

The purpose of this invention is to realize failure detection of equipment in burst type 1G transmission using an exclusive OR operation using a simple and simple circuit.

The principle will be explained using 242 diagrams. Assuming that there is no difference between men and women, the time when the human power is A and the output B is the same as Vζ shown in (a).

Tokoro-h(, When part of the old name of Isuha/Ba disappears,
(b) As shown in VC, an exclusive OR is established from tl to t2. Therefore, if exclusive ethics 40 is established, it can be determined that an abnormality has occurred in the first transmission.

Figure 2 (a) Exclusive ORing of K, human power, IH, A, output signal, and B (even if a bath VC is introduced, a whisker appears in the waveform at both ends, making it difficult to judge). There is also a possibility of fx.

So, the 1g issue on the other hand? Delay it, that stand-up 1'1
．． It is better to check whether the other Rakugo is present at the falling edge of ld or not. Since the output No. 14 is usually delayed in time compared to the input No. 1, it is particularly advantageous if the slow-rigid circuit does not need to be provided at all.

[Example of the release of Tsuki no Tomo]

In Figure 3, a system diagram of an example of a single point flaw in the LPL path that detects failure due to force is shown in Figure 3. In the figure, (2) to (7) show all the functional blocks similar to the f-kun 1 diagram, and (9) shows in4 (Tl) M
The entire A modulator or modem is equipped with a TDMA end station device, and its output is sent to the sending 1g frequency converter (2). (51-(7)) and my colleague's intermediate frequency band directional coupler (101).

Diode detector (11) repair [11 flow amplifier (commercial collection, Koneni Ili + 2 device (131 fully connected and rectangular wave power according to human burst TS); A similar Hibiki Q71 is installed in the No. 15 detection circuit on the output side of the one-way feed 1.4 unit.In this way, an exclusive OR circuit of both rectangular wave signals is created. (5
1 can detect all abnormalities in the equipment (in this case, the transmitting frequency converter (2) and the gravity amplifier 13) regardless of the rationality of the item.

Shoto, 41st! A specific example of the configuration of the exclusive OR 1h) iiVt of -j54≦ of X, l [mainly generated] is shown. This was done to prevent false aids due to the delicate timing that occurs when using the usual zet altruistic disjunction in conjunction with the same consideration, and points A and B in Figure 3. Is there a specific IC1l route to be constructed? I'm not doing it.

In the figure, (181 process (rise of input to T/mono at 1 m path of edge force type flip-flop as usual in 21n)) If KD/shoji is at H level, it is output, and the terminal is also at H level. 1 is a delay circuit, which is usually constructed by using the Bomaruna biflator 8 (i-).
Since it is normal for the discharge to be delayed compared to the discharge, no special delay discharge circuit is provided.

Next this l! -! I i1 Theory 1 about each 11νI work
Moon. D-flip flow rough-(18)'s D input is input, AL1 100 is input clock human power (T)
tr(is E, U's [No. 6 is input, and A's IH No. is already under human power Δ at the rising hh'h+ of the pulse of B process (state of H), then Q, output becomes H, and when the first sign of A is L, the reverse is K L K 3. On the other hand,
In the D flip flow rough of &11, the input signals of A and B are reversed, and the A signal is "U, 11", and after a certain period of time, the presence or absence of B1 is determined.

After 9 years, +181 D-flind of the sword
It is normal if both the Q and outputs of the ring are H, and when either one becomes L, it is abnormal if the 1J role of r, that is, A or B, becomes HVc but the other does not become HK. You can make a full judgment.

As explained above, if we use this language, we will leave a certain period of 41 i vc after the rising of one of the 1 h, and at the time of the rising of the 1 h, it will be manually determined whether the other 1 h is present or not. If we determine the appropriate delay Vζ from the burst length (pulse width) of No. 1g and its interval, etc., we can easily judge whether it is normal or abnormal after 4 times, and the normal Exclusive Music Theory II Wa no Yo VC Pulse
It also has the advantage of not causing an erroneous O at the falling edge.

It's Do, I'm happy -'111 is TDMA I
Although the explanation has been given as an example of all the S numbers, a system 1 such as 5CPC, in which the carrier is disconnected/not connected depending on the presence or absence of voice, is also effective.

Figure 4 shows the rise of one Ago and the other rei of lt#.
Although the judgment is made based on the presence or absence of 'i', it is not a problem to say that it will take a long time even if both the rising and falling edges are used.

FIG. 5 is a schematic diagram of m1 showing one row. The rut is a delay circuit that delays the output by a clock B, and the output is a delay circuit 1 (the output is a delay 1o+u that delays a clock A. cn and cai are clocks 1 and 1).
This is a flip-flop circuit in which if the J terminal is at H level when the g signal is standing, the Q terminal will be at H1ηi−7EL level! Similar to FIG. 114, this is a circuit that completely determines the presence or absence of the IN number of the other store when one store number rises. Ca, (,47
) At the falling edge of fj clock No. 1, K J ii is H
It is a flip-flop in which the level is Q, the terminals are H, Q, and the 4 children are L. When one old code goes down (I'), the other one is 1J.
This is a circuit that determines the presence or absence of a code.

〔Effect of the invention〕

In this invention, all faults are detected by the exclusive OR of the input signal of the transmission circuit and the output No. 15, so that the burst-like No. 1J can easily cause the damage caused by No. There is an effect that can be detected with a simple circuit configuration.

In history, input Igt! :Depending on whether the other old name exists at the rising or falling edge of one of the output old names (I and be.

[Brief explanation of the drawing]

Figure 1 (r:i) An example of the conventional No. 1g pumping cycle, Figure 2 is a waveform explanatory diagram showing the principle of the present complex, and Figure 43 is an example of the present invention. 1 case of Ichiosuna, ・43
Figure 4 is an example of a pulse comparison circuit using Mizumoto 1411 VC9
The same diagrams shown as + and 5 show a pulse ratio of 11!91 "l i
It is a 1r31 road map that beats the common other -X/11. 1! XI If (where (2) is a 4-closed wave detector,:
3) Kemagnetic force moe 1M detector, +51, lot it directional coupler, +61, (Ill ij detector, t+3
1゜(171 is a comparator, (151 is an exclusive OR circuit,
(18!, sil) D flip-frog circuit, (4)
is the delay direction I@. The same - symbol '/J in each figure is the same - or the corresponding part is all letters 〇Representative Masuo Oiwa 11J Figure 2; Figure 3! 6 Figure 4 51m

Claims (1)

[Claims] (1) A pulse waveform shaping circuit that shapes the human power of the transmitter that transmits the burst-like signal [r (Zo, [output + g') w waveform], and these pulse waveform shaping circuits 1rlJ
la! The exclusive logic of the output of 1 is engineered into exclusive OR circuits that take the output of 0 to detect abnormalities in the model. When the output of one pulse waveform shaping circuit rises, the sum circuit pulse waveform shaping circuit 11 of the other.
A, which has a circuit that completely detects whether or not the output of path 1 is present.
Ilc of the patent claim which is characterized by all the features of Ilc < boxed item 41; , 1: A circuit that detects whether or not the output of the other pulse waveform shaping circuit is present at I+, ν, and the output of the other pulse waveform shaping circuit when one pulse waveform shaping ti11 + general Tl falls. 2. The fault detection circuit according to claim 1, wherein the fault detection circuit is characterized in that the circuit detects whether or not a fault exists on the road.