JPS6188616A - Logic circuit system with faulty signal - Google Patents

Logic circuit system with faulty signal

Info

Publication number
JPS6188616A
JPS6188616A JP59209058A JP20905884A JPS6188616A JP S6188616 A JPS6188616 A JP S6188616A JP 59209058 A JP59209058 A JP 59209058A JP 20905884 A JP20905884 A JP 20905884A JP S6188616 A JPS6188616 A JP S6188616A
Authority
JP
Japan
Prior art keywords
signal
circuit
frequency
component
logic circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP59209058A
Other languages
Japanese (ja)
Inventor
Toru Kumasaka
徹 熊坂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP59209058A priority Critical patent/JPS6188616A/en
Publication of JPS6188616A publication Critical patent/JPS6188616A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K19/00Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/007Fail-safe circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Logic Circuits (AREA)

Abstract

PURPOSE:To inform a fault of a basic logic circuit by detecting the presence or absence of the square component of DELTAf0 contained in the product of the frequencies of two input signals. CONSTITUTION:A variable frequency circuit 11 supplies an output signal containing the product of frequencies of both inputs A and B to a filter circuit 12. The circuit 12 extracts the square component of a frequency DELTAf0 of the input signal fed from the circuit 11 as well as the component of a frequency f0.DELTAf0 and supplies them a comparator 13. The comparator 13 checks the component of DELTAf0<2> and regards the input of either one of both sides as a fault signal when said component does not exist. Then the comparator 13 supplies a signal (a) to a voltage control circuit 14, and a voltage controlled oscillator sends the output of the frequency f0 by the signal (A).

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は論理回路に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to logic circuits.

〔従来の技術〕[Conventional technology]

従来の論理回路においては、論理(山Mjまたは“真°
°および「0」または゛偽°′に幻してそれぞれ高レベ
ル(”H”)および低1ノヘル(” L ” >(また
1才反対)の電圧を対応っけ、論理回路の入力お上び出
jノ間の因果関係を真理値表等を用いて設定し、こねに
よって各人1)信号のN圧しベルの組合わせに対する各
出力信号の電圧し・ベルの組合せを対応づけ、これに基
づき論理回路の構成要糸の選定または股に1を1′:J
うcls本論理回路例えば論理和、論理積等はIC化さ
hた既製品が抹用さ11、これ等を組合わせることにょ
−)でより崗雑乙論理回路を1!築している。このよう
(こして作られた論理回路においては、例えば1つの基
本論理回路が故障した場合でもこの出力線にはパトビま
た(j” L ”の電圧が現われもしそれ等の電吐しl
\ルが偶然正しい結果を与えるとす4′t If、故障
(J検出されないまま累積され誤りを拡大する原因とな
りまた故障探究を困雌にしている。
In conventional logic circuits, logic (mountain Mj or “true degree
By corresponding to voltages of high level (“H”) and low level (“L” > (also 1 year opposite)) and “0” or “false °” respectively, the input of the logic circuit is Using a truth table, etc., set the cause-and-effect relationship between the output signal and the output signal, and each person 1) Correlate the combination of voltage and bell of each output signal with the combination of N pressure and bell of the signal, and Based on the selection of the main threads of the logic circuit or the crotch of 1 to 1':J
For this logic circuit, for example, logical sum, logical product, etc., ready-made products converted into ICs are used, and by combining these, we can make even more complicated logic circuits! is building. In a logic circuit made in this way, even if one basic logic circuit fails, a voltage of PATBI or (j"L" will appear on this output line, and if these electrical discharges occur,
If \le accidentally gives a correct result, failures (J) will accumulate without being detected, causing errors to expand and making trouble searching difficult.

〔解決しようとする問題点〕[Problem to be solved]

本発明は従来の技術における上記の欠点を除去するため
、基本論理回路の故障を知ら「る信号を付加して出力す
る論理回路方式を提供することを目的とする。
SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a logic circuit system that adds and outputs a signal indicating a failure in a basic logic circuit.

〔問題点を解決するための手段〕[Means for solving problems]

本発明による故障信号付論理回路方式は、周波数fOお
よびこれより十分少さい周波数偏移△rOを゛  それ
ぞれ設定し、周波数「0+△toを論理rIJに、to
−Δtoを論理「0」にあるいはこの反対に対応づける
と共に周波数toを故障信号に対応つける。
In the logic circuit system with a fault signal according to the present invention, a frequency fO and a frequency deviation △rO sufficiently smaller than this are set respectively, and the frequency ``0+△to'' is set as the logic rIJ, and the frequency deviation △rO is set as
-Δto is associated with logic "0" or vice versa, and frequency to is associated with the fault signal.

そして、論理回路の2つの入力信号の各周波数の積の周
波数を有する信号を求め、この信号から△fOの2乗成
分とto・△foとを抽出する。もしΔfOの2乗成分
が存在しないならば周波数toの故障信号を出力する。
Then, a signal having a frequency that is the product of the respective frequencies of the two input signals of the logic circuit is obtained, and the square component of ΔfO and to·Δfo are extracted from this signal. If the square component of ΔfO does not exist, a fault signal of frequency to is output.

もし、Δf0の2乗成分が存在するならばfO・△fO
の存否および存在するならばその正負、ならびにこの論
理回路の巣すべき論理機能の各々に基づき設定されたt
o+ΔfOまたはfO−△fOの周波数の信号を出力す
るように構成する。
If a square component of Δf0 exists, then fO・△fO
t is set based on the existence or nonexistence of , and if so, its polarity, and each of the logic functions to be nested in this logic circuit.
It is configured to output a signal with a frequency of o+ΔfO or fO−ΔfO.

〔作用〕[Effect]

上記構成により2つの入力信号の周波数の積に含まれる
Δtoの2乗成分の有無によって故障の有無がわかる。
With the above configuration, the presence or absence of a failure can be determined based on the presence or absence of a square component of Δto included in the product of the frequencies of two input signals.

故障の論理回路以後の全Cの論理回路は連鎖的に周波数
fOの信号を出ノ)シ、・、故障の光生お上υg乙生鎗
所を知らピる。
All C logic circuits after the faulty logic circuit output a signal of frequency fO in a chain manner.

〔実施例〕〔Example〕

以下本に案の実施例について図面を参照して詳細に税引
する。
The following is a detailed description of the proposed embodiments with reference to the drawings.

第1図は本考案の一実施例の回路図である。図におい−
r 111論理回路例えば論理和あるい(1論理積回路
であり、信号、へおよびBを入力し・、信号りを出りf
ろ。論理回路1は変周回路11、浦波回路12、比較回
路13、電工制御発振器14からなり、この論理回路の
論III能は比較回路13L:あらかじめ設定すること
によっC定まる。変周回路11は入力、へおよびBの各
周波数の積の周波数をhする出力信号をil!波回路1
2(二供給する。IIji波回路12はa′周回路11
からの入h (a @中周波数△foの2乗成分と周波
数fO・Δf0の11!20を゛抽出しt?較回路13
へ供給する。比較回路13はこの入力の正、負あるい1
ま零の各場合tこ応じU ′R1f i+lJ御発振器
4に対して周波数fo、 to+Δrまたはt。
FIG. 1 is a circuit diagram of an embodiment of the present invention. Figure smell-
r 111 logic circuit For example, a logical sum or (1 logical product circuit), which inputs the signal, to and B, and outputs the signal f
reactor. The logic circuit 1 includes a frequency changing circuit 11, a Urahami circuit 12, a comparator circuit 13, and an electrically controlled oscillator 14, and the logic function of this logic circuit is determined by setting the comparator circuit 13L in advance. The frequency changing circuit 11 outputs an output signal having a frequency h which is the product of the input, H, and B frequencies. wave circuit 1
2 (two supplies. IIji wave circuit 12 is
Input h (a @ Extracts 11!20 of the square component of the middle frequency △fo and the frequency fO・Δf0 and t? Comparison circuit 13
supply to Comparison circuit 13 detects whether this input is positive, negative or 1.
In each case of zero, the frequency fo, to+Δr or t for the oscillator 4 depends on U'R1f i+lJ.

−ΔfOの信号を発振するためのそれすれの電圧a。- each voltage a for oscillating a signal of ΔfO.

bあるいはCのうちの1つを供給する。Either b or c is supplied.

入力AおよびBの周波数によって変周回路11の出力周
波数は下記のようになる。
Depending on the frequencies of inputs A and B, the output frequency of the frequency changing circuit 11 is as follows.

入hAおよびBがいずれもfO十△foならば、(ず0
+ΔfO)(fo+Δto) −foe +2to−△ro+△fom ・(1)入力
AおよびBがいずれもto−ΔrOならば(ro−八t
o)  (fo−△fo)−fO2−2toΔfo十Δ
fo” ・・・ (2)入t′JA、Bの一方がfo+
△tO1他方がfo−△fOならば (fo十八へO)(to−八fo) −fO2−△fOを・・・(3) 入力A、Bのいずれか一方がfOならばである。
If inputs hA and B are both fO+△fo, then (zu0
+ΔfO) (fo+Δto) -foe +2to-△ro+Δfom ・(1) If inputs A and B are both to-ΔrO, (ro-8t
o) (fo−△fo)−fO2−2toΔfo×Δ
fo” ... (2) One of input t'JA and B is fo+
ΔtO1 If the other is fo-ΔfO, (fo to 18 O) (to-8 fo) -fO2-ΔfO... (3) If either input A or B is fO.

比較回路13においてはまず△fo2の成分をチェック
し、これが存在しないならば(4)式に基ずき少くども
いず(1か一方の入力(i号を故障信号とみなし、信号
aを電圧制御回路14に供給し重任制御y!振器けこの
信号al:よ)で周波数toの出力信号を送出する。
The comparator circuit 13 first checks the component of △fo2, and if it does not exist, it does not do anything based on equation (4). The signal is supplied to the control circuit 14, and an output signal of frequency to is sent out using the overlapping control signal al:yo).

△f02の成分があるならば入力信号A、Bに故障信号
は含まれておらず(1)、(2)あるいは(3)式のい
ずれかの場合ぐあることになる。
If there is a component of Δf02, the input signals A and B do not contain a fault signal, which means that any one of equations (1), (2), or (3) is present.

(1)および(2)式と(3)式とtJ:ro・△r。Equations (1) and (2) and (3) and tJ:ro・Δr.

成分の有無によって区別される。(1)および(2)式
1−L 2つの入力信号A、8が等しいことを示しく3
)式はそれ等が興なることを示す。
They are distinguished by the presence or absence of ingredients. (1) and (2) Equations 1-L Indicate that the two input signals A and 8 are equal 3
) expressions indicate that they occur.

H,較回1! 13にljあらかし゛ダl論理回路1の
甲すべき論I!J槻能(例えば論理和、論理情等)が設
定されておりこ41にIJつき入力信号のtOφΔf0
の存否および存在fる場合はその正負の符号によって出
力(M 丹11 t、 t: 11.0 カ出ノノサレ
4. ?!trEfttlll1発1ira14は入力
信号1)あるいはOによってそれぞれ周波数fO−+l
:xl’0あるい1ヱfO−ΔfOの信号を出力す6一 る。
H, Comparison 1! In 13, I will explain the theory of logic circuit 1! tOφΔf0 of the input signal with IJ is set in the input signal 41 where the J function (for example, logical sum, logical information, etc.) is set.
If there is f, the output is determined by its positive or negative sign (M = 11 t, t: 11.0).
:xl' Outputs a signal of 0 or 1 fO - ΔfO.

第2図は論理回路1を論理和回路および論理積回路とし
て使用づる場合の、入カフへおよびBの6周波数に対す
る出力りの周波数の対応表を示′Tj′。
FIG. 2 shows a correspondence table of the frequencies of the input cuff and B for the six frequencies 'Tj' when the logic circuit 1 is used as an OR circuit and an AND circuit.

入力信号A、Bが同一の場合)二はto・Δto成分か
正のときは(1)式によってf+)十△fOが、fO・
△to成分が角のときに11 (2>式によってto−
△fOが出力される。また入力信月A、Bの周波数か異
なる場名に1:1(3)式によってfo△tハ成分(」
在合しないことにJ、つてU(別される。この場合には
、もし論理和回路として使用する場合にIjftr+△
fO1論理積回路とし1使用する場合にはto−Δ[0
か出クツされる。
When the input signals A and B are the same) 2 is to・∆to component, or if it is positive, f+) 1△△fO becomes fO・
When the △to component is an angle, 11 (to-
ΔfO is output. Also, if the frequencies of the input signals A and B are different, the fo△t component (''
J and U (separated. In this case, if used as an OR circuit, Ijftr + △
When using one as fO1 AND circuit, to−Δ[0
Or get kicked out.

少くとも1つの入力かfOであるならは(4)式によっ
て「0が出力される。
If at least one input is fO, 0 is output according to equation (4).

論理和および論理積に限らJ゛、他の論理殿能について
も同様な論理表を作成°することができ、そt’を等の
各回路において比較回路13の入力のrO・△fo成分
と出力信号l)あよひCを対重・づけることに」;って
いかなる1叩機能も実現できろことは勿論である。いず
れの場合でも入力信号の1つ1ズ1−がfoである一合
は出力信号は「OとなるJ:うにすること1よ言うをま
たない。
Similar logic tables can be created for other logic functions only for logical sums and logical products, and t' can be expressed as rO and △fo components of the input of the comparison circuit 13 in each circuit such as Of course, it is possible to realize any one-hit function by adding the output signal l) Ayohi C to the output signal. In any case, if one of the input signals is fo, the output signal becomes O.

〔効果〕〔effect〕

本発明による故障信号f=J論理回路方式によって、論
理回路の構成素子の故障および故障部位の検出が正確か
つ容易に行うことができ故障探求、復旧が迅速どなり保
守性が一段と向上する。
By using the fault signal f=J logic circuit method according to the present invention, it is possible to accurately and easily detect a fault in a component of a logic circuit and a fault location, and the fault search and recovery are quick and easy, thereby further improving maintainability.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例の回路図、第2図(j本光明
の一実施例の論理図表P 8する。 1・・・・・・論理回路、 A、B・・・・・・2つの入力、 D・・・・・・出力。 出願人 日本電気車−ムTレクl−[Jニクス株式会社
Fig. 1 is a circuit diagram of an embodiment of the present invention, and Fig. 2 is a logic diagram of an embodiment of the present invention. 1...Logic circuit, A, B...・Two inputs, D...output. Applicant: NEC Corporation

Claims (1)

【特許請求の範囲】[Claims] 1、周波数f_0およびこれより十分小さい周波数偏移
Δf_0をそれぞれ設定し、f_0+Δf_0を論理「
1」にf_0−Δf_0を論理「0」にあるいはこの反
対に各々対応づけると共に前記f_0を故障信号に対応
づけ、論理回路の2つの入力信号の各周波数の積の周波
数を有する信号を求め、この信号にΔf_0の2乗成分
が存在しないならば、前記周波数f_0の故障信号を出
力し、Δf_0の2乗成分が存在するならば更にf_0
Δf_0成分の有無および符号と前記論理回路の果すべ
き論理機能に基づき周波数f_0+Δf_0あるいはf
_0−Δf_0の信号を出力することを特徴とする故障
信号付論理回路方式。
1. Set the frequency f_0 and the frequency deviation Δf_0 sufficiently smaller than this, and set f_0+Δf_0 according to the logic “
1", f_0 - Δf_0 is respectively associated with the logic "0" or the opposite, and the f_0 is associated with the fault signal, and a signal having a frequency that is the product of the respective frequencies of the two input signals of the logic circuit is obtained. If a square component of Δf_0 does not exist in the signal, a fault signal of the frequency f_0 is output, and if a square component of Δf_0 exists, an additional frequency f_0 is output.
The frequency f_0+Δf_0 or f is based on the presence or absence and sign of the Δf_0 component and the logical function to be performed by the logic circuit.
A logic circuit system with a fault signal, characterized in that it outputs a signal of _0-Δf_0.
JP59209058A 1984-10-05 1984-10-05 Logic circuit system with faulty signal Pending JPS6188616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59209058A JPS6188616A (en) 1984-10-05 1984-10-05 Logic circuit system with faulty signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59209058A JPS6188616A (en) 1984-10-05 1984-10-05 Logic circuit system with faulty signal

Publications (1)

Publication Number Publication Date
JPS6188616A true JPS6188616A (en) 1986-05-06

Family

ID=16566554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59209058A Pending JPS6188616A (en) 1984-10-05 1984-10-05 Logic circuit system with faulty signal

Country Status (1)

Country Link
JP (1) JPS6188616A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928725A (en) * 1982-08-09 1984-02-15 Hitachi Ltd Logical system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928725A (en) * 1982-08-09 1984-02-15 Hitachi Ltd Logical system

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