JPH0358605A

JPH0358605A - Resistance attenuator

Info

Publication number: JPH0358605A
Application number: JP19592289A
Authority: JP
Inventors: Makoto Watanabe; 誠渡辺
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 1989-07-27
Filing date: 1989-07-27
Publication date: 1991-03-13

Abstract

PURPOSE:To vary an output voltage without momentary off-state of an output by providing a 1st switch in parallel with a T-shaped resistance network and providing a 2nd switch in series with a ground resistor. CONSTITUTION:Resistors R2-R4 form a T-shaped attenuation circuit and a switch S1 is provided in parallel with the resistors R2, R4 and a switch S2 is arranged between the resistor R3 and GND. The switches S1, S2 are operated complimentarily such that the S2 is turned off when the switch S1 is turned on or vice versa. Thus, the input and the output are always connected through the resistors R1, R2 and R4 and there are only three levels as a level with the switch S2 turned on, a level with the switch S2 turned off and its intermediate level in the output level V2 and momentary off-state is avoided to the output.

Description

【発明の詳細な説明】産業上の利用分野本発明は信号発生器、計測器等に使用する減衰器に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an attenuator used in signal generators, measuring instruments, etc.

従来の技術第３図は従来の減衰器の構成を示している。第１３図にトいて、Ｖ３は入力電厚を示してーる。Ｒ６は抵
抗であり、スイソチＳ３の前に配置されている。Ｒ７、
Ｒ８、Ｒ９は担抗であり、ＴノｑｌＪ減衰回路を構成し
ている。Ｓ　４　ｉ＋：スイッチてちり、出力の前に配
置されている。出力は抵抗ＲＩＯにより終端されている
。１たＶ４１ｒＪ、出力電圧を示してしる。Prior Art FIG. 3 shows the configuration of a conventional attenuator. In FIG. 13, V3 indicates the input electrical thickness. R6 is a resistor and is placed in front of the switch S3. R7,
R8 and R9 are resistors and constitute a T/QlJ attenuation circuit. S 4 i+: The switch is placed in front of the output. The output is terminated by a resistor RIO. 1V41rJ indicates the output voltage.

次に上記従来例の動作について説明する。裁４図におい
て、Ｓ；３、Ｓ４はスイソチＱオン、オノの状態を示し
ている。図に示すように、Ｓ３と８４は１つたく同じ動
作をずる。』ず、Ｓ３、Ｓ４がＡ側のとき、出力レベル
Ｖ４は抵抗Ｒ６とＲ］０により分圧されるので、出力レ
ベル■４は、Ｒ６＋Ｒ］Ｏどなる。次に、Ｓ３、Ｓ４がＢ　｛Ｉｌｌ　ｔ７）とき
、ｖ／ＩはＲ　６　＋　Ｒ　７とＲ８により分犀され、
さらにＲ９とＲｈｏにより分圧されるので、Ｖ３ｘＲ８ｘＲ］０となる。Next, the operation of the above conventional example will be explained. In Figure 4, S;3 and S4 indicate the state of Suisochi Q-on and Ono. As shown in the figure, S3 and 84 shift the same operation by one. First, when S3 and S4 are on the A side, the output level V4 is divided by the resistors R6 and R]0, so the output level 4 becomes R6+R]O. Next, when S3 and S4 are B {Ill t7), v/I is divided by R 6 + R 7 and R8,
Furthermore, since the voltage is divided by R9 and Rho, it becomes V3xR8xR]0.

このように上記従来例でも、出力レベルを可変すること
ができる。In this way, the output level can also be varied in the above conventional example.

発１ｊｌｌが解決しようとする課題しかしながら、上記従来の減衰器では第４図のようにス
イッチが切り変わる瞬間に両スイッチが同時に開放され
る場合があり、出力が一度オフになってし１う。そのた
め、この出力を利用してヒステリシス唱性を持った１０
］路を評価することが困難であったり、過渡的な特性を
見ることができないなどの問題があった。However, in the conventional attenuator described above, as shown in FIG. 4, both switches may be opened at the same time at the moment the switch is changed, and the output is once turned off. Therefore, using this output, 10
] There have been problems such as it being difficult to evaluate the road and the transient characteristics not being visible.

本発明はこのような従来の問題を解決するものであり、
出力を一瞬オフにすることなく出力電圧を変化できる優
れたｌｉｊ．ｌ路を長゛−供することを目的とするもの
である。The present invention solves these conventional problems,
An excellent lij. that allows you to change the output voltage without turning off the output momentarily. The purpose is to provide a long route.

課題を解決するための手段本発明は上記目的を達成するためにＴ型の抵抗網と兼列
にスイッチｓ１を設け、さらに接地１Ｆ（抗に而夕｛］
にスイッチＳ２を設けてぃる１、そしてｓ１とＳ　ＩＪ
：ｓ　］がオンタ゛るとｓ２がオフし、８１がオフずる
とＳ２がオンするという．］：うに反転動イ／１をさぜ
る。Means for Solving the Problems In order to achieve the above object, the present invention provides a switch s1 in parallel with the T-shaped resistor network, and further connects the ground to the ground 1F.
A switch S2 is provided in IJ1, and s1 and S IJ
:s] is turned on, s2 is turned off, and when 81 is turned off, S2 is turned on. ]: Stir the sea urchin inversion motion A/1.

作川木発明１：　．．．．Ｌ：記の、１二う，７，　１，１
．１成に，１ニリ次（ＩＪ）　．．Ｉ：うＡ−効果を有
する。すなわち、人出刀間はＲ１、Ｒ２、Ｒ／Ｉにより
、つねにつながってお・り、出カレベルはＳ２がオンの
ときのレベルど、ｓ２がオフのときのレベルおよびその
中間の３つのレベルしかなく、出力が１同時的にオフに
なるとーうことかなくなる。Sakukawaki Invention 1: . ．．．．．． L: Note, 12, 7, 1, 1
．． 1st generation, 1st generation (IJ). ．． I: Has an A-effect. In other words, the output level is always connected by R1, R2, and R/I, and there are only three output levels: the level when S2 is on, the level when s2 is off, and the three levels in between. There is no possibility that the outputs will be turned off simultaneously.

実施例第１図は本発明の一実施例の構成、第２図ｆｃｌ：　「
司実施例の信号波形図である。第１図において、Ｒ１、
Ｒ２、■え３、Ｒ４、Ｒ　５　Ｌｄ択抗であり、Ｒ２、
Ｒ３、Ｒ／ｌによりＴ型減衰口路を構成している。Embodiment FIG. 1 shows the configuration of an embodiment of the present invention, and FIG. 2 fcl:
FIG. 3 is a signal waveform diagram of the embodiment. In FIG. 1, R1,
R2, 3, R4, R 5 Ld selective, R2,
R3 and R/l constitute a T-shaped damping port.

Ｓ１、Ｓ２Ｕ、スイッチでちり、Ｒ２とＲ　７１に亜列
ｆ／ｔＺｓ］、Ｒ　３とＧ　Ｎ　Ｄ　ｌｉｊｊにｓ２が
自己ｔｉ：：ｉされる。S1, S2U, switch, substring f/tZs] to R2 and R 71, s2 to R 3 and G N D lijj self ti::i.

５　＼次に、上記実施例の動作について説明フる。第１図、第２図によ・いて、１ずスイッチＳ１がオンのときＳ２はオフとなり、このとき出力レベル■ ２は、択抗Ｒ１とＲ５により分圧されるので、入カレベルを■１どすると、Ｒｌ−１−Ｒ５どなる。5 ＼ next, The operation of the above embodiment will now be explained. Figure 1, According to Figure 2, 1zu switch S 1 is on When , S2 is turned off, At this time, the output level 2 is Selective resistance R1 Since the pressure is divided by and R5, Enter Karebel■1 Then, Rl-1-R5 bawl.

Ｓ１が２ノのどき、Ｓ２はオンとなり、このとり分汗されさらに、Ｒ４どＲ５により分圧されるので、どなる。S 1 throbs 2, S2 is turned on, Konoto I sweat a lot, and The pressure is divided by R4 and R5. So, bawl.

捷た、スイノチＳ］、Ｓ２のオン、２ノ時に、過渡的にスイッチＳｌ．，Ｓ２の両方ともオンになる場
合や、両方ともオフになる場合がある。When S2 is turned on and S2 is turned on, the switch Sl. , S2 may both be turned on, or both may be turned off.

スイッチＳ１、Ｓ２の両方ともオンになる場合は、となる。If both switches S1 and S2 are turned on, becomes.

１た、スイッチＳ１、Ｓ２の両刀ども１ノになるｊ易合
は、Ｒ　］．　４−　Ｒ　２　＋　Ｒ　４　＋　Ｒ　５とな
る。1.If both the swords of switches S1 and S2 become 1, then R ]. 4-R2+R4+R5.

このように上記実施例によれば、スイッチＳ１、Ｓ２ぱ
オン、オフ動作でよく、シかも、スイッチ切換時の過渡
的な動作によっても、出力の瞬断はな〈なるという効果
を有する。As described above, according to the above embodiment, the switch S1 and S2 may be turned on and off, and even if the switch is switched on or off, there is no momentary interruption of the output.

発明の効果４不発１力ｉｑｌ、ト詔実施例、１；り明らかなように、
出力が瞬１１吉的（でオフになることなく、Ｊユ１に示
す効果をイ１ずる。Effect of the invention 4 As is clear from the example 1,
The output is instantaneous (without turning off), and the effect shown in Jyu1 is achieved.

（１）本減衰器を通った信″１じを利用１〜で、ｌくス
テリンス特性をもった１同路の評価が容易にできる。(1) By using the signal passing through this attenuator, it is possible to easily evaluate a single path having a stealth characteristic.

（２）本の．ｋ衰器を通った仁−シじを利用し，て、様
々な一Ｉ路のｉＡ！　Ｄｕ　４．！＋’　４Ｉｌを見る
ことかできる。(2) Books. Utilizing the power that has passed through the k-decay device, various types of iA can be used! Du 4. ! +' I can see 4Il.

（１）　ＡＮｎＱ　｝′．．！”ｄ：４　ｋ　’）（（
１　ッ／ｃイ１、畳台白ｆＡ　７１Ｊ　？！Ｊ制？ａｌ
ｌ　ｌ＋−１路を゛も−）／，二ｌ””ｌ　ｌｌｌ３系
に入力し；”−　（’−き、利イ！Ｉの変動かＪ１！、
之小眼で−［むので、ｒｉｌ路糸が安定する寸での時間
を知縮ずるこどができる。(1) ANnQ }′. ．． ! "d:4k')((
1 t/c 1, tatamidai white fA 71J? ! J system? al
Input the l l+-1 path into the ゛mo-)/,2 l''''l lll3 system;''- ('-ki, profit! I fluctuation J1!,
Because of the small eyes, it is possible to shorten the time it takes for the ril line to stabilize.

[Brief explanation of drawings]

第１図ケ２−１木発明の一丈施例による同路図、第２図
Ｌ１、木大施例を｛）ｊ’　”；’Ｉ発ｌＩ米の減衰器
に利用し／ζときの概略波形、第３図は従来の抵抗減衰
器、第４目１　ｉｔ．従来の１１（抗減良？：；ろ−信
月発牛米のδ．ｋ自？：｛に利用し／でときの概略波形
である。Ｒ１　砥抗、Ｒ．　２　　抵抗、Ｒ３　抵抗、Ｒ４砥抗
、Ｒ５　拭抗、Ｓ１　第１のスイッチ、Ｓ２第２のスイ
ッチ、■１　人力電圧、■２　出力電月−　０Figure 1 ke2-1 The same path diagram according to the Ichijo example of the wooden invention, Figure 2 L1, the wooden example is used for the attenuator of the The schematic waveform, Fig. 3 shows the conventional resistance attenuator, the 4th eye 1 it. R1 Grinding resistance, R. 2 Resistance, R3 Resistance, R4 Grinding resistance, R5 Wiping resistance, S1 1st switch, S2 2nd switch, ■1 Human power voltage, ■2 Output electric power - 0

Claims

[Claims]

a T-type attenuation circuit having an input terminal, an output terminal, and a ground terminal; a first switch means for opening and closing the input terminal and the output terminal of the attenuation circuit; and a first switch means for opening and closing the earth terminal of the attenuation circuit and the ground. 2 switch means, when the attenuation circuit is used, the first switch means is opened and the second switch means is closed, and when the attenuation circuit is not used, the first switch is closed. A resistive attenuator characterized in that said means is closed and said second switch means is opened.