JPS58127435A - Hysteresis noise controlling circuit - Google Patents

Hysteresis noise controlling circuit

Info

Publication number
JPS58127435A
JPS58127435A JP1050582A JP1050582A JPS58127435A JP S58127435 A JPS58127435 A JP S58127435A JP 1050582 A JP1050582 A JP 1050582A JP 1050582 A JP1050582 A JP 1050582A JP S58127435 A JPS58127435 A JP S58127435A
Authority
JP
Japan
Prior art keywords
noise
electric field
amplifier
noise control
hysteresis
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
JP1050582A
Other languages
Japanese (ja)
Inventor
Hisao Shimoida
下井田　久雄
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1050582A priority Critical patent/JPS58127435A/en
Publication of JPS58127435A publication Critical patent/JPS58127435A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To perform stably noise control from a low to a high electric field, by changing the reception hysteresis width in response to the set position of a noise controlling variable resistor. CONSTITUTION:A sound signal demodulated at a demodulator 1 is inputted to a high-pass filter 2 and a sound amplifier 9. After noise components in the sound signal are picked up at a high-pass filter 2, the components are converted into a DC voltage at a noise detector 4. After this DC voltage is amplified at an amplifier 5, the voltage controls a squelch switch 6. A feedback controlling circuit 13 varies the hysteresis width being the reception electric field input where sound is connected and the reception electric field input where the sound is interrupted in response to the set position of a noise controlling variable resistor 8. Thus, the noise control is performed stably from a low to a high electric field.

Description

【発明の詳細な説明】 この発明は音声通話を目的とする無線電話機のヒステリ
シス雑音制御回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hysteresis noise control circuit for a radio telephone intended for voice communication.

第１図は従来のヒステリシス雑音制御回路を備えた音声
通話を目的とする無線電話機の一部詳細なブロック図で
ある。同図にお−て、（１）は復調信号を出力する復調
回路、（２）はこの復調信号から雑音のみを抽出する高
域Ｆ波器、（３）はこの雑音を増幅する雑音増幅器、（
４）はこの雑音電圧を直流電圧毒毒億毒毒に変換する雑
音検波器、（５）はこの直流電圧を増幅する直流増幅器
、（６）は一定電圧でオン−オフ動作するスイッチ回路
、（７）はこのスイッチ回路（６）の出力により直流増
幅器（５）の利得を変化させる帰還回路、（８）は直流
増幅！　（５）の利得を変化させ、雑音制御の設定を行
なう雑音制御ポリニーム、（９）は音声増幅器、ａ呻は
スピーカである。FIG. 1 is a partially detailed block diagram of a conventional radio telephone equipped with a hysteresis noise control circuit and intended for voice communication. In the figure, (1) is a demodulation circuit that outputs a demodulated signal, (2) is a high-frequency F wave generator that extracts only noise from this demodulated signal, (3) is a noise amplifier that amplifies this noise, (
4) is a noise detector that converts this noise voltage into a DC voltage, (5) is a DC amplifier that amplifies this DC voltage, (6) is a switch circuit that operates on and off at a constant voltage, ( 7) is a feedback circuit that changes the gain of the DC amplifier (5) by the output of this switch circuit (6), and (8) is a DC amplification! (5) is a noise control polynomial that changes the gain and sets noise control; (9) is an audio amplifier; and (a) is a speaker.

なお、Ｉは上記高域Ｐ波器（２）、雑音検波！（３）、
雑音検波器（４）、直流増幅器（５）、スイッチ回路（
６）および帰還回路（７）から構成され、その動作特性
図を第２図に示すヒステリシス雑音制御回路である。In addition, I is the above-mentioned high-frequency P-wave device (2), noise detection! (3),
Noise detector (4), DC amplifier (5), switch circuit (
6) and a feedback circuit (7), the operating characteristics of which are shown in FIG. 2.

また、第２図において、横軸に雑音制御ボリュームの位
置Ｐを、縦軸に受信入力電界Ｅをとった場合でちり、直
線（１２ａ）は音声増幅器（９）が断から接になる雑音
制御ボリューム位置に対する受信電界入力特性、直線（
１２ｂ）は音声増幅器（９）が接から断になる雑音制御
ボリューム位置に対する受信電界入力特性、（１２ｃ）
はヒステリシス幅、直線（１２ｄ）　。In addition, in Fig. 2, the horizontal axis represents the position P of the noise control volume, and the vertical axis represents the receiving input electric field E, and the straight line (12a) is the noise control where the audio amplifier (9) is in contact with the audio amplifier (9). Received electric field input characteristics with respect to volume position, straight line (
12b) is the received electric field input characteristic for the noise control volume position where the audio amplifier (9) is disconnected; (12c)
is the hysteresis width, a straight line (12d).

は雑音制御ボリュームで、設定可能な最小の受信入力電
界を示す。is the noise control volume, which indicates the minimum receive input electric field that can be set.

次に、上記構成によるヒステリシス雑音制御回路の動作
にりいて説明する。まず、復調回路（１）によって復調
された音声信号は高域Ｐ波器（２）に入力すると共に音
声増幅器（９）Ｋ入力する。Next, the operation of the hysteresis noise control circuit having the above configuration will be explained. First, the audio signal demodulated by the demodulation circuit (1) is input to the high-frequency P-wave unit (2) and is also input to the audio amplifier (9) K.

ここで、高域−波器（２）に入力した音声信号はこの高
域ｐ波器（２）により雑音成分のみ抽出される。Here, from the audio signal input to the high-frequency wave generator (2), only noise components are extracted by the high-frequency p-wave generator (2).

そして、この雑音成分は雑音増幅器（３）で増幅される
。そして、この増幅された雑音成分は雑音検出器（４）
により、雑音量に比例した直流電圧に変換される。そし
て、この変換された直流電圧は直流増幅器（５）で増幅
されたのち、スイッチ回路（６）に入力する。このため
、このスイッチ回路（６）が一定電圧で動作し、接信号
および断信号を音声増幅器（９）に出力する。したがっ
て、音声増幅器（９）はこのスイッチ回路（６）から入
力する接信号および断信号により、接、断動作を行なう
。このため、その接信号が入力している間だけ、復調回
路（１）Ｋよって、復調された音声信号を増幅する。こ
の増幅された音声信号はスピーカａ鴫に入力し、音響と
して出力される。一方、スイッチ回路（６）の出力の一
部は前退回路（力を通して、直流増幅器（５）に一定量
の帰還を与える。すなわち、音声増幅器（９）が接動作
のとき、直流増幅器（５）の利得を下げ、逆に、音声増
幅器（９）が断―作のとき、直流増幅器（５）の利得を
上げることにより％直流増幅器（５）Ｋヒステリシス特
性を持たせることができる。この動作を更に第２図を参
照して説明する。今、無人力電界の状態で、音声増幅器
（９）が断になるよう雑音制御ボリューム（８）を設定
したのち、受信電界入力を徐々に高くした場合、直線（
１２ａ）と雑音制御ボリューム（８）の設定位置との交
点くおける受信入力電界で、音声増幅器（９）は接とな
る。次に、受信電界入力を徐々に低くした場合、直線（
１２ｂ）と雑音制御ボリューム（８）の設定位置との交
点くおける受信入力電界で音声増幅ｉ！！（９）は所と
なる。すなわち、ヒステリシス幅（１２ｃ）のヒステリ
シス特性を持つことになり、雑音制御ボリューム（８）
の位置に関係なくヒステリシス＠　（１２ｃ）は一定に
なる。また、直線（１２ａ）と直線（１２ｄ）との交点
は音声の接になる最少の受信入力電界と雑音制御ボリュ
ーム（８）の位置を示し、直線（１２ｂ）と直線（１２
ｄ）との交点は音声の断となる最小の受信入力電界と雑
音制御ボリューム（８）の位置を示す。This noise component is then amplified by a noise amplifier (3). This amplified noise component is then sent to a noise detector (4).
It is converted into a DC voltage proportional to the amount of noise. Then, this converted DC voltage is amplified by a DC amplifier (5) and then input to a switch circuit (6). Therefore, this switch circuit (6) operates at a constant voltage and outputs a connection signal and a disconnection signal to the audio amplifier (9). Therefore, the audio amplifier (9) performs the on/off operation based on the on/off signal inputted from the switch circuit (6). Therefore, the demodulating circuit (1)K amplifies the demodulated audio signal only while the direct signal is being input. This amplified audio signal is input to the speaker a and output as sound. On the other hand, a part of the output of the switch circuit (6) passes through the forward and backward circuit (power) to give a certain amount of feedback to the DC amplifier (5). That is, when the audio amplifier (9) is in direct operation, the DC amplifier (5) ), and conversely, when the audio amplifier (9) is disconnected, by increasing the gain of the DC amplifier (5), the DC amplifier (5) can have K hysteresis characteristics.This operation will be further explained with reference to Figure 2. Now, in the state of unmanned electric field, after setting the noise control volume (8) so that the audio amplifier (9) is turned off, the received electric field input is gradually increased. If the straight line (
12a) and the setting position of the noise control volume (8), the audio amplifier (9) becomes a contact. Next, when the received electric field input is gradually lowered, a straight line (
12b) and the setting position of the noise control volume (8). ! (9) is the place. In other words, it has a hysteresis characteristic with a hysteresis width (12c), and the noise control volume (8)
The hysteresis @ (12c) remains constant regardless of the position of . In addition, the intersection of the straight line (12a) and the straight line (12d) indicates the position of the minimum received input electric field and the noise control volume (8) that are in contact with the audio, and the intersection of the straight line (12b) and the straight line (12
The intersection with d) indicates the position of the minimum received input electric field and the noise control volume (8) at which the audio is cut off.

しかしながら、従来のヒステリシス雑音制御回路は低い
電界の条件で使用する場合でも雑音制御ボリュームの位
置を直線（１２ｂ）と直線（１２ｄ）との交点より為い
所に設定しなければならず、音声増幅器（９）が接にな
るには設定点よりさらにヒステリシス幅（１２ｃ）以上
の高い入力電界が必要となり、またそのため、ヒステリ
シス幅（１２ｃ）をあｔｔ大きくできない欠点があった
。However, even when the conventional hysteresis noise control circuit is used under low electric field conditions, the position of the noise control volume must be set far from the intersection of the straight line (12b) and the straight line (12d). In order for (9) to become tangent, an input electric field higher than the set point and greater than the hysteresis width (12c) is required, and as a result, there is a drawback that the hysteresis width (12c) cannot be increased by att.

したがつ工、この発明の目的は低い電界から高い電界ま
で安定に雑音制御が可能であり、しかも受信電界の変動
に対する通話の安定性、および対雑音性に対しても十分
な性能を得ることができるヒステリシス雑音制御回路を
提供するものである。However, the purpose of this invention is to be able to stably control noise from low electric fields to high electric fields, and to obtain sufficient performance in terms of call stability and noise resistance against fluctuations in the received electric field. This provides a hysteresis noise control circuit that can perform

このような目的を達成するため、この発明は音声が接に
なる受信電界入力と音声が断になる受信電界入力との差
であるヒステリシス幅を、雑音側ｓ？４ボリュームの設
定位置に応じて変えるものであり、以下実施列を用いて
詳細に説明する。In order to achieve such an object, the present invention calculates the hysteresis width, which is the difference between the received electric field input where the audio is connected and the received electric field input where the audio is disconnected, on the noise side s? It changes depending on the setting position of the 4 volumes, and will be explained in detail below using the implementation column.

第３図はこの発明に係るヒステリシス雑音制御回路の一
実施例を備えた音声通話を目的とする無線電話機の一部
詳細なブロック囚である。同図におい’Ｃ１Ｑ３は、ス
イッチ回路（６）から入力する接信号、すなわち音声が
接になる受信電界入力においては直流増幅器（５）の利
得を下げると共に、雑音制御ボリューム（８）の設定位
置が低いときには直流増幅器（５）への帰還量を少なく
し、雑音制御ボリューム（８）の設定位置が鳥いときに
は直流増幅器（５）への帰還量を多くするようＫＬ、ま
た、スイッチ回路（６）から入力する断信号、すなわち
音声が断になる受信電界入力に２いては直流増壜器（５
）の利得を上げると共（、雑音制御ボリューム（８）の
設定位置が低いときＫは直流増幅器（５）への帰還量を
少なくし、雑音制御ボリューム（８）の設定位置が高い
ときには直流増幅器（５）の帰還量を多くするように制
御する帰還制御回路である。FIG. 3 is a partially detailed block diagram of a wireless telephone for the purpose of voice communication, which is equipped with an embodiment of the hysteresis noise control circuit according to the present invention. In the same figure, 'C1Q3' lowers the gain of the DC amplifier (5) at the receiving electric field input where the contact signal input from the switch circuit (6), that is, the voice is connected, and the setting position of the noise control volume (8) is adjusted. When the noise control volume (8) is set at a low position, the amount of feedback to the DC amplifier (5) is decreased, and when the setting position of the noise control volume (8) is low, the amount of feedback to the DC amplifier (5) is increased. A DC intensifier (5
), and when the noise control volume (8) is set low, K decreases the feedback amount to the DC amplifier (5), and when the noise control volume (8) is set high, the DC amplifier (5) This is a feedback control circuit that controls to increase the amount of feedback.

なお、ａ◆は上記高域Ｐ波器（２）、雑音検波器（３）
、雑音検波器（４）、直流増幅器（５）、スイッチ回路
（６）および帰還制御回路ａｓから構成され、その動作
特性を第４図に示すヒステリシス雑音制御回路である。In addition, a◆ is the above-mentioned high-frequency P wave detector (2) and noise detector (3)
, a noise detector (4), a DC amplifier (5), a switch circuit (6), and a feedback control circuit AS, and its operating characteristics are shown in FIG. 4.

次に上記構成によるヒステリシス雑音制御回路の動作に
つい１第４図を参照して説明する。まず、復調回路（１
）によって復調された音声信号は高域Ｐ波器（２）に入
力すると共に音声増幅器（９）Ｋ入力する。Next, the operation of the hysteresis noise control circuit having the above configuration will be explained with reference to FIG. First, the demodulation circuit (1
The audio signal demodulated by ) is input to the high-frequency P-wave unit (2) and is also input to the audio amplifier (9) K.

ここで、高域Ｐ波器（２）に入力した音声信号はこの高
域ｐ波器（２）により雑音成分のみ抽出される。そして
、この雑音成分は雑音増幅器（３）で増幅される。Here, from the audio signal input to the high-frequency P-wave device (2), only noise components are extracted by the high-frequency P-wave device (2). This noise component is then amplified by a noise amplifier (3).

そして、この増幅された雑音成分は雑音検出器（４）に
より帷音量に比例した直流電圧に変換される。This amplified noise component is then converted by a noise detector (4) into a DC voltage proportional to the screen volume.

そして、この変換された直流電圧は直流増幅器（５）で
増幅されたのち、スイッチ回路（６）に入力する。Then, this converted DC voltage is amplified by a DC amplifier (5) and then input to a switch circuit (6).

このためこのスイッチ回路（６）が一定電圧で動作し、
接信号および断信号を音声増幅器（９）および帰還制御
回路αｊに出力する。このため、音声増幅器（９）はこ
のスイッチ回路（６）から入力する接信号および断信号
により接・断動作を行なう。したがつ℃、この音声増幅
器（９）はこの接信号が入力している間だけ、復調回路
（１）によって復調され丸音声信号を増幅する。この増
幅された音声信号はスピーカＱｌに入力し、音響として
出力される。一方、スイッチ回路（６）の出力の一部は
帰還制御回路ａ１に入力する、したがって、この帰還制
御回路Ｃ１３はスイッチ回路（６）から入力する接信号
により直流増幅器の利得を下げると共に、雑音制御ボリ
ューム（８）の設定位置が低いときには直流増幅器（５
）への帰還量を少なくし、雑音制御ボリューム（８）の
設定位置が高いときには直流増幅器（５）への帰還量を
多くするようにする。また、スイッチ回路（６）から入
力する断信号により、直流増幅器（５）の利得を上げる
と共に、雑音制御ボリューム（８）の設定位置が低いと
きには直流増幅器（５）への帰還量を少なくシ、雑音制
御ボリューム（８）の設定位置が高いときには直流増幅
器（５）への帰還量を多くするようにする。この結果、
第４図に示すように、雑音制御ボリューム（８）の設定
位置が低い場合にはヒステリシス幅（１２ｃ）が小さく
なり、雑音制御ボリューム（８）の設定位置が高い場合
にはヒステリシス幅（１２ｃ）が大きくなる。すなわち
、音声増幅器（９）が接になるときの雑音制御ボリュー
ム（８）の位置に対する受信入力電界特性は直線（１２
ａ）　（＄　４図参照）となり、第２図に示す直線（１
２ａ）と同じ傾斜を示すが、音声増幅器（９）が断にな
るときの雑音制御ボリューム（８）の位置に対する受信
入力電界特性は直線（１２ａ）　（第４図参照）となり
、第２図に示す直線に比べ傾斜が緩くなる。Therefore, this switch circuit (6) operates at a constant voltage,
The connection signal and disconnection signal are output to the audio amplifier (9) and the feedback control circuit αj. Therefore, the audio amplifier (9) performs the connection/disconnection operation based on the connection signal and disconnection signal inputted from the switch circuit (6). Therefore, the audio amplifier (9) is demodulated by the demodulation circuit (1) and amplifies the round audio signal only while this direct signal is input. This amplified audio signal is input to the speaker Ql and output as sound. On the other hand, a part of the output of the switch circuit (6) is input to the feedback control circuit a1. Therefore, this feedback control circuit C13 lowers the gain of the DC amplifier by the direct signal input from the switch circuit (6), and also controls noise. When the setting position of the volume (8) is low, the DC amplifier (5)
), and when the noise control volume (8) is set at a high position, the amount of feedback to the DC amplifier (5) is increased. In addition, the gain of the DC amplifier (5) is increased by the disconnection signal input from the switch circuit (6), and when the setting position of the noise control volume (8) is low, the amount of feedback to the DC amplifier (5) is reduced. When the setting position of the noise control volume (8) is high, the amount of feedback to the DC amplifier (5) is increased. As a result,
As shown in Figure 4, when the setting position of the noise control volume (8) is low, the hysteresis width (12c) becomes small, and when the setting position of the noise control volume (8) is high, the hysteresis width (12c) becomes small. becomes larger. In other words, when the audio amplifier (9) is in contact with the noise control volume (8), the received input electric field characteristics with respect to the position of the noise control volume (8) are expressed by a straight line (12
a) (see Figure 4), and the straight line (1
It shows the same slope as in 2a), but when the audio amplifier (9) is turned off, the receiving input electric field characteristic with respect to the position of the noise control volume (8) becomes a straight line (12a) (see Fig. 4), and as shown in Fig. 2. The slope is gentler than the straight line shown.

また、直線（１２ａ）と直線（１２ｂ）との交点が最少
設定電界ライン（１２ｄ）に近い所に来ている。Further, the intersection of the straight line (12a) and the straight line (12b) is located close to the minimum set electric field line (12d).

なお、上記実施例では帰還制御回路により帰還量を制御
するようにしたが、音声増幅器を断から接にする受信入
力電界の設定を雑音制御ボリュームで行ない、接から断
になる受信入力電界を一定にしてもよいことはもちろん
でおる。In the above embodiment, the amount of feedback is controlled by the feedback control circuit, but the reception input electric field that changes the audio amplifier from disconnection to connection is set using the noise control volume, and the reception input electric field that changes from connection to disconnection is kept constant. Of course, it is okay to do so.

以上詳細に説明したように、この発明に係るヒステリシ
ス雑音制御回路によれば雑音制御ボリュームを低い電界
で接になるように設定する場合はヒステリシス特性を持
たない状態で設定できるため、従来より低い電界で運用
が可能になる。また、空間雑音や妨害波などによる誤動
作を防ぐため、高い電界で接になるように設定した場合
でも、いったん接の状態になればヒステリシス幅が大き
いため、電界の変動に対しても音声の途切れがなくなる
などの効果がある。As explained in detail above, according to the hysteresis noise control circuit according to the present invention, when the noise control volume is set to be in contact with a low electric field, it can be set without having hysteresis characteristics, so that the electric field is lower than that of the conventional one. operation becomes possible. In addition, even if a high electric field is set to connect to prevent malfunctions caused by spatial noise or interference waves, once the electric field is connected, the hysteresis width is large, so even if the electric field fluctuates, audio interruptions may occur. It has the effect of eliminating

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

第１図は従来のヒステリシス雑音制御回路を備えた音声
通話を目的とする無線電話機の一部詳細なブロック図、
第２図は第１図のヒステリシス雑音制御回路の動作特性
を示す図、第３図はこの発明に係るヒステリシス雑音制
御回路の一実施例を備えた音声通話を目的とする無線電
話機の一部詳細なブロック図、第４図は第３図のヒステ
リシス雑音制御回路の動作特性を示す図である。 （１）・・・・復調回路、（２）・・・・高域ｐ波器、
（３）・・・・雑音増幅器、（４）・・・・雑音検波器
、（５）・・・・直流増幅器、（６）・・・・スイッチ
回路、（７）・・・・帰還回路、（８）・・・・雑音制
御ボリューム、（９）・・・・音声増幅器、α・・・・
・スピーカ、α９・・・・ヒステリシス雑音制御回路、
（１２ａ）　、　（１２ｂ）および（１２ｄ）　−−−
−受信電界入力特性、（１２ｃ）・・・・ヒステリシス
幅、（１１・・・・帰還制御回路、α◆・・・・ヒステ
リシス１ｉｌｆｆｌ制御回路。 なお、同一符号は同一または相当部分を示す。 代　理　人　　葛　　野　　信　　−（ほか１名）第１
図 第２図 第４図FIG. 1 is a partially detailed block diagram of a conventional wireless telephone equipped with a hysteresis noise control circuit for the purpose of voice communication.
FIG. 2 is a diagram showing the operating characteristics of the hysteresis noise control circuit shown in FIG. 1, and FIG. 3 is a partial detail diagram of a wireless telephone for the purpose of voice communication equipped with an embodiment of the hysteresis noise control circuit according to the present invention. FIG. 4 is a block diagram showing the operating characteristics of the hysteresis noise control circuit of FIG. 3. (1)... Demodulation circuit, (2)... High frequency p-wave device,
(3)...Noise amplifier, (4)...Noise detector, (5)...DC amplifier, (6)...Switch circuit, (7)...Feedback circuit , (8)...Noise control volume, (9)...Audio amplifier, α...
・Speaker, α9... Hysteresis noise control circuit,
(12a), (12b) and (12d) ---
- Received electric field input characteristics, (12c)...Hysteresis width, (11...Feedback control circuit, α◆...Hysteresis 1ilffl control circuit. The same symbols indicate the same or equivalent parts. Shinto Kuzuno - (1 other person) 1st
Figure 2 Figure 4

Claims (1)

【特許請求の範囲】[Claims] ヒステリシス雑音制御回路を備えた無線電話機において
、音声が接になる受信電界入力と音声が断になる受信電
界入力との差であるヒステリシス幅を、雑音制御ボリュ
ームの設定位置に応じて変えたことを特徴とするヒステ
リシス雑音制御回路。In a wireless telephone equipped with a hysteresis noise control circuit, the hysteresis width, which is the difference between the received electric field input where the voice is connected and the received electric field input where the voice is cut off, is changed depending on the setting position of the noise control volume. Features a hysteresis noise control circuit.
JP1050582A 1982-01-25 1982-01-25 Hysteresis noise controlling circuit Pending JPS58127435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1050582A JPS58127435A (en) 1982-01-25 1982-01-25 Hysteresis noise controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1050582A JPS58127435A (en) 1982-01-25 1982-01-25 Hysteresis noise controlling circuit

Publications (1)

Publication Number Publication Date
JPS58127435A true JPS58127435A (en) 1983-07-29

Family

ID=11752059

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1050582A Pending JPS58127435A (en) 1982-01-25 1982-01-25 Hysteresis noise controlling circuit

Country Status (1)

Country Link
JP (1) JPS58127435A (en)

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