JPS63175870U - - Google Patents
Info
- Publication number
- JPS63175870U JPS63175870U JP6772587U JP6772587U JPS63175870U JP S63175870 U JPS63175870 U JP S63175870U JP 6772587 U JP6772587 U JP 6772587U JP 6772587 U JP6772587 U JP 6772587U JP S63175870 U JPS63175870 U JP S63175870U
- Authority
- JP
- Japan
- Prior art keywords
- input circuit
- signal
- measured
- output
- voltage
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims 4
- 238000005259 measurement Methods 0.000 claims 2
- 239000003990 capacitor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
第１図及び第２図はこの考案による測定器の入
力回路の実施例に係り、第１図はその構成の一例
を示す回路図、第２図はその変形実施例を示す回
路図、第３図は従来装置の構成を示すブロツク線
図、第４図は従来装置の入力回路の回路図、第５
図は従来装置の入力回路の特性説明図である。
図中、１は信号源、２は被測定体、３は電流／
電圧変換器、１０，１２はバツフア増幅器、１１
は差動増幅器、１３は反転増幅器、１４は加算増
幅器である。
1 and 2 relate to an embodiment of the input circuit of the measuring instrument according to this invention, FIG. 1 is a circuit diagram showing an example of its configuration, FIG. 2 is a circuit diagram showing a modified example thereof, and FIG. 3 is a circuit diagram showing an example of its configuration. The figure is a block diagram showing the configuration of the conventional device, FIG. 4 is a circuit diagram of the input circuit of the conventional device, and FIG.
The figure is an explanatory diagram of characteristics of an input circuit of a conventional device. In the figure, 1 is the signal source, 2 is the object to be measured, and 3 is the current/
Voltage converter, 10, 12 buffer amplifier, 11
is a differential amplifier, 13 is an inverting amplifier, and 14 is a summing amplifier.
Claims (1)
ンスの大きさに関連して発生する応答信号を入力
回路を介して検出し、その検出出力にて所定の測
定を行う測定器の入力回路において、 上記入力回路は、上記応答信号の電流もしくは
電圧を検出する電圧検出手段と、 上記被測定体と上記電圧検出手段間に介在する
容量とほぼ等しい値のコンデンサおよび負荷抵抗
を含む帰還回路を有する増幅器を備え、上記容量
により上記被測定体と電圧検出手段間に発生する
不要信号のうち少なくとも周波数成分を含む不要
信号に対してその打消し用信号を形成する補正用
信号形成手段と、 上記電圧検出手段の出力に対して上記補正用信
号形成手段からの出力を加算又は減算する加減算
手段とを備えていることを特徴とする測定器の入
力回路。[Claim for Utility Model Registration] A measurement signal is applied to the object to be measured, a response signal generated in relation to the magnitude of the impedance is detected via an input circuit, and a predetermined measurement is performed using the detection output. In the input circuit of the measuring instrument, the input circuit includes a voltage detection means for detecting the current or voltage of the response signal, a capacitor and a load resistor having a value approximately equal to the capacitance interposed between the object to be measured and the voltage detection means. a correction signal that forms a canceling signal for an unnecessary signal containing at least a frequency component among unnecessary signals generated between the object to be measured and the voltage detection means using the capacitance; An input circuit for a measuring instrument, comprising: a forming means; and an adding/subtracting means for adding or subtracting the output from the correction signal forming means to or from the output of the voltage detecting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6772587U JPH0633424Y2 (en) | 1987-05-06 | 1987-05-06 | Input circuit of measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6772587U JPH0633424Y2 (en) | 1987-05-06 | 1987-05-06 | Input circuit of measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63175870U true JPS63175870U (en) | 1988-11-15 |
| JPH0633424Y2 JPH0633424Y2 (en) | 1994-08-31 |
Family
ID=30906899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6772587U Expired - Lifetime JPH0633424Y2 (en) | 1987-05-06 | 1987-05-06 | Input circuit of measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0633424Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07244087A (en) * | 1994-03-01 | 1995-09-19 | Pfu Ltd | Signal input circuit |
-
1987
- 1987-05-06 JP JP6772587U patent/JPH0633424Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07244087A (en) * | 1994-03-01 | 1995-09-19 | Pfu Ltd | Signal input circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0633424Y2 (en) | 1994-08-31 |
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