KR0122855B1 - High impedance test circuit - Google Patents
High impedance test circuitInfo
- Publication number
- KR0122855B1 KR0122855B1 KR1019930010662A KR930010662A KR0122855B1 KR 0122855 B1 KR0122855 B1 KR 0122855B1 KR 1019930010662 A KR1019930010662 A KR 1019930010662A KR 930010662 A KR930010662 A KR 930010662A KR 0122855 B1 KR0122855 B1 KR 0122855B1
- Authority
- KR
- South Korea
- Prior art keywords
- input
- signal
- high impedance
- comparator
- output
- 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.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
본 발명은 하이 임피던스 측정회로에 관한 것으로, 특히 입력신호를 비교기를 통하여 기준신호와 비교하여 디지탈 계측기만으로 입력신호의 하이 임피던스 상태의 유무를 판별할 수 있도록 된 하이 임피던스 측정회로에 관한 것이며, 입력단자(1)를 통하여 비반전단자에 입력되는 입력신호와 반전단자에 입력되는 기준신호(Va)를 비교하는 비교기(COMP1)와, 이 비교기(COMP1)의 출력신호를 반전시키는 인버어터(NT)와,상기 입력단자(1)를 통하여 비반전단자에 입력되는 입력신호와 반전단자에 입력되는 기준신호(Vb)를 비교하는 비교기(COMP2)와, 이 비교기(COMP2)의 출력신호와 상기 인버어터(NT)의 출력신호를 논리합하는 OR 게이트(OR)로 구성된 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high impedance measuring circuit, and more particularly, to a high impedance measuring circuit capable of determining the presence or absence of a high impedance state of an input signal by using only a digital measuring instrument by comparing an input signal with a reference signal through a comparator. (1) a comparator COMP1 for comparing the input signal input to the non-inverting terminal and the reference signal V a input to the inverting terminal, and an inverter NT for inverting the output signal of the comparator COMP1. And a comparator COMP2 comparing the input signal input to the non-inverting terminal and the reference signal V b input to the inverting terminal through the input terminal 1, the output signal of the comparator COMP2 and the inverter. The OR gate is configured to OR the output signal of the adapter NT.
Description
제1도는 본 발명의 실시회로도이다.1 is an exemplary circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
COMP1∼COMP2 : 비교기, NT : 인버어터,COMP1 ~ COMP2: Comparator, NT: Inverter,
OR : OR 게이트.OR: OR gate.
본 발명은 하이 임피던스 측정회로에 관한 것으로, 특히 입력신호를 비교기를 통하여 기준신호와 비교하여 디지탈 계측기만으로 입력신호의 하이 임피던스(Hi-Z) 상태의 유무를 판별할 수 있도록 된 하이 임피던스 측정회로에 관한 것이다.The present invention relates to a high impedance measuring circuit, and more particularly, to a high impedance measuring circuit capable of determining the presence or absence of a high impedance (Hi-Z) state of an input signal by using a digital measuring instrument by comparing an input signal with a reference signal through a comparator. It is about.
종래에는 아날로그 계측기로는 하이 임피던스 상태를 측정할 수 있었지만 디지탈 계측기로는 하이 임피던스 상태를 측정할 수 없다는 문제점이 있었다.Conventionally, high impedance states can be measured with analog meters, but high impedance states cannot be measured with digital meters.
이에 본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 입력신호와 기준신호를 비교하여 입력신호가 하이 또는 로우신호이면 하이신호를 출력하고, 입력신호가 하이 임피던스 상태일 때는 로우신호를 출력함으로써 디지탈 계측기만으로 입력신호의 하이 임피던스 상태의 유무를 판별할 수 있는 하이 임피던스 측정회로를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, and compares the input signal and the reference signal, and outputs a high signal when the input signal is a high or low signal, and outputs a low signal when the input signal is in a high impedance state. Accordingly, an object of the present invention is to provide a high impedance measuring circuit capable of discriminating the presence or absence of a high impedance state of an input signal using only a digital measuring instrument.
이하, 본 발명의 실시예를 제1도에 의하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 1.
본 발명은 제1도에 도시된 바와 같이, 입력단자(1)를 통하여 비반전단자에 입력되는 입력신호와 반전단자에 입력되는 기준신호(Va)를 비교하는 비교기(COMP1)와, 이 비교기(COMP1)의 출력신호를 반전시키는 인버어터(NT)와, 상기 입력단자(1)를 통하여 비반전단자에 입력되는 입력신호와 반전단자에 입력되는 기준신호(Vb)를 비교하는 비교기(COMP2)와, 이 비교기(COMP2)의 출력신호와 상기 인버어터(NT)의 출력신호를 논리합하는 OR 게이트(OR)로 구성되어 있다.As shown in FIG. 1, the present invention provides a comparator COMP1 for comparing an input signal input to a non-inverting terminal and a reference signal V a input to an inverting terminal through an input terminal 1, and the comparator. Inverter NT for inverting the output signal of COMP1 and comparator COMP2 comparing the input signal input to the non-inverting terminal and the reference signal V b input to the inverting terminal through the input terminal 1. ) And an OR gate OR that logically combines the output signal of the comparator COMP2 with the output signal of the inverter NT.
여기서 미설명부호 2는 출력단자이다.Reference numeral 2 is an output terminal.
다음에는 상기와 같은 구성으로 된 본 발명 실시예의 작용효과를 설명한다.Next will be described the operation and effect of the embodiment of the present invention having the configuration as described above.
본 발명은 먼저 하이 임피던스(Hi-Z) 상태를 나타내는 입력신호를, 예를 들어 2.5[V]라 하면, 기준신호들(Va,Vb)의 값은 VaHi-Z 입력신호Vb의 관계가 되도록, 예를 들어 Va=2[V], Vb=3[V]로 설정한다.In the present invention, if the input signal indicating the high impedance (Hi-Z) state is, for example, 2.5 [V], the values of the reference signals V a and V b are V a Hi-Z input signal V b. For example, V a = 2 [V] and V b = 3 [V] so as to be a relationship.
그리고, 입력단자(1)을 통하여 입력되는 입력신호가 하이일 경우, 기준신호(Va)와 입력신호를 비교하는 비교기(COMP1)의 출력은 하이가 되고, 이 하이의 출력신호는 인버어터(NT)에 의해 로우로 반전되며, 한편 비교기(COMP2)에는 하이의 입력신호와 기준신호(Vb)가 입력되어 하이의 신호가 출력되고 상기의 인버어터(NT)의 로우출력과 논리합되어 하이신호를 출력하게 된다.And, when the input signal is inputted via the input terminal (1) high, the output of the reference signal (V a) and the comparator (COMP1) for comparing the input signal goes high, the output signal of the highs inverter ( NT) is inverted to low, while the comparator COMP2 receives the high input signal and the reference signal V b to output a high signal, and logically combines the low output of the inverter NT to the high signal. Will print
입력신호가 로우일 경우, 기준신호(Va)와 입력신호를 비교하는 비교기(COMP1)의 출력은 로우가 되고, 이 로우의 출력신호는 인버어터(NT)에 의해 하이로 반전되며, 한편 비교기(COMP2)에는 로우의 입력신호와 기준신호(Vb)가 입력되어 로우의 신호가 출력되고 상기의 인버어터(NT)의 하이출력과 논리합되어 하이신호를 출력하게 된다.If the input signal is low, the output of the reference signal (V a) and the comparator (COMP1) for comparing the input signal goes low, the output signal of this low is inverted to high by inverter (NT), while the comparator A low input signal and a reference signal V b are input to the COMP2 to output a low signal, and are ORed together with the high output of the inverter NT to output a high signal.
입력신호가 하이 임피던스일 경우, 기준신호(Va)와 하이 임피던스 입력신호를 비교하는 비교기(COMP1)의 출력은 하이가 되고, 이 하이의 출력신호는 인버어터(NT)에 의해 로우로 반전되며, 한편 비교기(COMP2)에는 입력신호와 기준신호(Vb)가 입력되어 로우의 신호가 출력되고 상기의 인버어터(NT)의 로우출력과 논립합되어 로우신호를 출력하게 된다.If the input signal is at a high impedance, the output of the reference signal (V a) and the high impedance input comparator (COMP1) for comparing is high, the output signal of this high is inverted to a low by an inverter (NT) On the other hand, the comparator COMP2 receives an input signal and a reference signal V b to output a low signal, and is inconsistent with the low output of the inverter NT to output a low signal.
이상의 설명에서와 같이 본 발명은, 입력신호가 하이 임피던스 상태일 경우는 로우신호가 출력되고, 입력신호가 하이 임피던스 상태가 아닐 경우는 하이신호가 출력되므로 입력신호의 하이 임피던스 상태의 유무를 디지탈 계측기만으로 판별할 수 있게 되는 것이다.As described above, according to the present invention, a low signal is output when the input signal is in a high impedance state, and a high signal is output when the input signal is not in a high impedance state. It can be determined only.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930010662A KR0122855B1 (en) | 1993-06-11 | 1993-06-11 | High impedance test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930010662A KR0122855B1 (en) | 1993-06-11 | 1993-06-11 | High impedance test circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR950001314A KR950001314A (en) | 1995-01-03 |
| KR0122855B1 true KR0122855B1 (en) | 1997-12-05 |
Family
ID=19357265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019930010662A Expired - Fee Related KR0122855B1 (en) | 1993-06-11 | 1993-06-11 | High impedance test circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0122855B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200071436A (en) * | 2018-12-11 | 2020-06-19 | 삼성전자주식회사 | A power amplifier and an elelctronic device comprising the same |
| KR102574188B1 (en) * | 2022-08-19 | 2023-09-04 | 심플라온 주식회사 | Protection circuit for digital amp |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100314756B1 (en) * | 1999-06-04 | 2001-11-15 | 신형인 | Rubber Compound for bladder |
-
1993
- 1993-06-11 KR KR1019930010662A patent/KR0122855B1/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200071436A (en) * | 2018-12-11 | 2020-06-19 | 삼성전자주식회사 | A power amplifier and an elelctronic device comprising the same |
| KR102574188B1 (en) * | 2022-08-19 | 2023-09-04 | 심플라온 주식회사 | Protection circuit for digital amp |
Also Published As
| Publication number | Publication date |
|---|---|
| KR950001314A (en) | 1995-01-03 |
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