JPH025043B2 - - Google Patents
Info
- Publication number
- JPH025043B2 JPH025043B2 JP58157524A JP15752483A JPH025043B2 JP H025043 B2 JPH025043 B2 JP H025043B2 JP 58157524 A JP58157524 A JP 58157524A JP 15752483 A JP15752483 A JP 15752483A JP H025043 B2 JPH025043 B2 JP H025043B2
- Authority
- JP
- Japan
- Prior art keywords
- alc
- circuit
- time constant
- variable gain
- 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.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 claims description 26
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000004043 responsiveness Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はALC回路に係わり、特に電波形式に
応じてALC電圧の保持時間を変更できるALC回
路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ALC circuit, and particularly to an ALC circuit that can change the holding time of an ALC voltage depending on the radio wave format.
通常、ALC回路は第１図に示す送信終段部６
を保護するための無線通信機等の送信回路に設け
られる。送信回路は送信装置１、前段送信回路
４、可変利得増幅器５、送信終段部６およびアン
テナ７で構成される。送信装置１の電鍵２（自動
送信装置を含む）、マイクロホン３等で生成され
た送信信号はモード選択ダイヤル１３で選択され
たモードに応じた電波型式の高周波送信電力をア
ンテナ７から送信できるよう前段送信回路４で増
幅、変調、帯域選択等の波形処理を受ける。可変
利得増幅器５等の送信出力制御回路は波形処理を
受けた送信信号を送信終段部６へ出力する。送信
終段６は入力された送信信号から高周波送信電力
を生成しアンテナ７から電波として空中へ放射す
る。この電波型式には変調型式（振幅、位相、パ
ルス等）および伝送型式（電信、電話、映像、フ
アクシミル等）に係わる属性がありアマチユア無
線ではAM，FM，SSB（上側波帯または下側波
帯）CW、FSK（SSB、AM等を用いた周波数シ
フトキーイング即ちオーデイオFSK…AFSKを
含む）等がある。また、送信終段部６に設けられ
る電力増幅には真空管または半導体素子が用いら
れ、電力増幅のオーバレベルとその最大持続時間
が送信終段６の焼損、劣化等を防止するための設
計目標となつている。更に、音声信号（アナログ
波形）と電鍵信号（デジタル波形）では有信号の
出現確率が異なり、特に無信号時の電波に搬送波
が放射されないSSBでは、ALC電圧発生回路９
による送信終段部６に現われたオーバレベルの検
出時間、つまり、ALC電圧立ち上がり時間と
ALC電圧発生回路９で発生したALCで、可変利
得増幅器５等の利得を抑圧し、オーバレベルが解
除されもと通りに回復するまでの時間、つまり、
ALC電圧保持時間とが適切な連続送信を保証す
る重要な要素となつている。なお、送信終段部６
を効率よく動作させるため、ALC電圧で制御さ
れる可変利得増幅器５等の被制御回路を各段に設
け、各段における平常時およびALCスタート時
のレベル配分が適切となるよう計られている。図
下符号１２はドライブコントロールボリユームで
あり、このドライブコントロール回路は、ALC
回路８と送信終段部６との間に設けられることも
ある。また、送信終段部６の高周波送信電力を制
御するため他にマイクゲインボリユーム（自動マ
イクゲインコントロール回路を含む）等が設けら
れている。
Normally, the ALC circuit consists of the transmission final stage 6 shown in Figure 1.
Provided in transmitting circuits of wireless communication equipment, etc. to protect The transmitting circuit includes a transmitting device 1, a pre-stage transmitting circuit 4, a variable gain amplifier 5, a transmitting final stage section 6, and an antenna 7. The transmission signal generated by the telephone key 2 (including the automatic transmission device), microphone 3, etc. of the transmitting device 1 is sent to the front stage so that the radio wave type high frequency transmission power corresponding to the mode selected with the mode selection dial 13 can be transmitted from the antenna 7. The transmitting circuit 4 performs waveform processing such as amplification, modulation, and band selection. A transmission output control circuit such as a variable gain amplifier 5 outputs a transmission signal subjected to waveform processing to a transmission final stage section 6. The final transmission stage 6 generates high-frequency transmission power from the input transmission signal and radiates it into the air from the antenna 7 as a radio wave. This radio wave type has attributes related to modulation type (amplitude, phase, pulse, etc.) and transmission type (telegraph, telephone, video, facsimile, etc.). AM, FM, SSB (upper sideband or lower sideband) is used in amateur radio. ) CW, FSK (frequency shift keying using SSB, AM, etc., that is, audio FSK...including AFSK), etc. Further, a vacuum tube or a semiconductor element is used for the power amplification provided in the transmission final stage 6, and the overlevel of the power amplification and its maximum duration are the design goals to prevent burnout, deterioration, etc. of the transmission final stage 6. It's summery. Furthermore, the probability of appearance of a signal is different between an audio signal (analog waveform) and a telephone key signal (digital waveform), and especially in SSB where a carrier wave is not emitted in the radio wave when there is no signal, the ALC voltage generation circuit 9
The detection time of the overlevel that appeared in the transmission final stage 6, that is, the ALC voltage rise time and
The ALC generated by the ALC voltage generation circuit 9 suppresses the gain of the variable gain amplifier 5, etc., and the time until the overlevel is released and the original state is restored, that is,
ALC voltage hold time is an important factor in ensuring proper continuous transmission. In addition, the transmission final stage section 6
In order to operate efficiently, a controlled circuit such as a variable gain amplifier 5 controlled by the ALC voltage is provided at each stage, and the level distribution at each stage is appropriate during normal times and at the start of the ALC. Reference numeral 12 at the bottom of the figure is a drive control volume, and this drive control circuit is an ALC
It may also be provided between the circuit 8 and the transmission final stage section 6. In addition, a microphone gain volume (including an automatic microphone gain control circuit) and the like are provided in order to control the high frequency transmission power of the transmission final stage section 6.
通常、有信号がアナログ波形のSSBが他の電波
形式に比べてALC電圧保持時間の設計条件が複
雑である。したがつて従来のALC回路６の時定
数はSSBに対応できるように定めてある。このた
め、有信号の出現確率が異なるSSBによるAFSK
では極めて応答性が悪い等の欠点を有している。
また、FMによるFSKではマーク周波数とスペー
ス周波数の差（通常170Hz〜850Hz）、および、バ
ンドパルスフイルタを通過するそれぞれの周波数
に対するフイルタロスにより、無視できないフイ
ルタリツプルが発生する欠点を有している。本発
明は上述した点にかんがみなされたもので、電波
型式に対応できるALC電圧が得られるALC回路
の提供を目的とする。
Normally, the design conditions for ALC voltage holding time for SSB, where the signal is an analog waveform, are more complex than for other radio wave formats. Therefore, the time constant of the conventional ALC circuit 6 is determined to be compatible with SSB. Therefore, AFSK using SSB with different probabilities of occurrence of signals
However, it has drawbacks such as extremely poor responsiveness.
Furthermore, FSK using FM has the disadvantage that a non-negligible filter ripple occurs due to the difference between the mark frequency and the space frequency (usually 170 Hz to 850 Hz) and the filter loss for each frequency passing through the band pulse filter. The present invention has been made in consideration of the above points, and an object of the present invention is to provide an ALC circuit that can obtain an ALC voltage compatible with radio wave types.
出力の基準値以上で発生するALC制御信号を、
モード切換スイツチと連動する親接点に入力し、
モードに応じた子接点の出力側にはそれぞれのモ
ードに合つた時定数回路を配設し、選択されたモ
ードに応じて決定される時定数回路を通つた
ALC信号が、前段増幅器及び可変利得増幅器に
入力してALC制御する構成である。
The ALC control signal generated above the output reference value is
Input to the master contact that works with the mode selector switch,
A time constant circuit suitable for each mode is arranged on the output side of the child contact according to the mode, and the time constant circuit determined according to the selected mode is used.
The configuration is such that the ALC signal is input to the preamplifier and variable gain amplifier to perform ALC control.
第２図は本発明のALC回路の一実施例を示す
ブロツク図であり、第２図について説明する。第
１図と同一符号は同一構成であり、説明は省略す
る。１６は時定数切換ダイヤルである。モード選
択ダイヤル１３を回転すると連動して親接点Pa
と子接点P1〜P5と接触する。
FIG. 2 is a block diagram showing an embodiment of the ALC circuit of the present invention, and FIG. 2 will be explained below. The same reference numerals as in FIG. 1 indicate the same configuration, and the explanation will be omitted. 16 is a time constant switching dial. When the mode selection dial 13 is rotated, the parent contact P a
Contact with child contacts P 1 to P 5 .
ALC回路１５には複数の時定数回路To（説明の
ためｎを５とする）が設けられている。時定数回
路T1〜T5の入側は時定数ダイヤル１６の子接点
P1〜P5と接続され、出側は並列接続されて端子
１５ｂを介して各段の被制御回路の被制御端子へ
接続されている。送信終段部６がオーバレベルと
なるとオーバレベル電圧はＸ−X′結線、ドライ
ブコントロールボリユーム１２およびＹ−Y′結
線を介して端子５ａへ出力される。ALC電圧発
生回路９はオーバレベル電圧を検出しALC電圧
をモード選択ダイヤル１３の親接点Paへ出力す
る。 The ALC circuit 15 is provided with a plurality of time constant circuits T o (n is assumed to be 5 for explanation). The input side of time constant circuit T 1 to T 5 is the child contact of time constant dial 16.
P1 to P5 , and the output side is connected in parallel and connected to the controlled terminal of the controlled circuit in each stage via the terminal 15b. When the transmission final stage section 6 becomes overlevel, the overlevel voltage is outputted to the terminal 5a via the X-X' connection, the drive control volume 12, and the Y-Y' connection. The ALC voltage generation circuit 9 detects an overlevel voltage and outputs the ALC voltage to the parent contact P a of the mode selection dial 13 .
ここで、子接点P1に接続されている時定数回
路T1が従来の時定数回路１０と同り時定数と
し、、子端子P1〜P5がSSB（音声）、FM（音声、符
号）AM（音声）、SSB（符号）、AM（符号）に該
当するよう構成されていると、SSB（音声）では
従来と同じ時定数で動作する。 Here, the time constant circuit T 1 connected to the child contact P 1 has the same time constant as the conventional time constant circuit 10, and the child terminals P 1 to P 5 are connected to SSB (audio), FM (audio, code). ) If configured to correspond to AM (voice), SSB (code), or AM (code), SSB (voice) will operate with the same time constant as before.
モード選択ダイヤル１３を操作しFSKを選択
すると時定数切換ダイヤル１６の親接点Paと子
接点P2とが接続されFM（音声、符号）に相当す
る時定数回路T2に切換えられる時定数回路T2は
時定数回路T1〜T5が電波型式にもとずき、それ
ぞれ独立した回路構成となつているのでドライブ
コントロールボリユーム１２を操作すると電波型
式に対する最適高周波送信電力を得ることがで
き、ドライブコントロールボリユームに対応して
単一の時定数回路を制御する従来のALC回路に
比べて応答性の不都合が改善される。 When FSK is selected by operating the mode selection dial 13, the master contact P a and slave contact P 2 of the time constant switching dial 16 are connected, and the time constant circuit is switched to the time constant circuit T 2 corresponding to FM (voice, code). In T2 , the time constant circuits T1 to T5 are based on the radio wave type and each has an independent circuit configuration, so by operating the drive control volume 12, the optimum high frequency transmission power for the radio wave type can be obtained. This improves responsiveness compared to conventional ALC circuits that control a single time constant circuit in response to drive control volume.
時定数回路T1〜T5に対する電波型式の割付け
は上記実施例に限定されず、例えばFM（音声、
符号）SSB（符号）、AM（符号）を同一の時定数
回路T2を用いるよう構成してもよい。 The assignment of radio wave types to the time constant circuits T 1 to T 5 is not limited to the above embodiments. For example, FM (audio,
SSB (sign) and AM (sign) may be configured to use the same time constant circuit T2 .
時定数切換ダイヤル１６による切換情報はモー
ド切換回路１４から得られるよう構成し時定数切
換ダイヤル１６を省略してもよい。 The switching information by the time constant switching dial 16 may be obtained from the mode switching circuit 14, and the time constant switching dial 16 may be omitted.
本発明によるALC回路は異なる時定数を生成
する複数の時定数回路とモード選択手段による選
択動作に対応して前記時定数回路を選択する時定
数選択手段と、を具備した構成としてあるため、
モード選択手段により異なる時定数回路を選択で
きる特長を有している。このため電波型式に応じ
たALC電圧保持時間を選択できドライブコント
ロール回路等と併用して最適送信電力を得られる
効果がある。また、時定数に係わる設計の自由度
が向上し、かつ異なる電圧型式相互で同一バンド
パスフイルタを共用出来る等回路構成の簡略化が
期待できる。
Since the ALC circuit according to the present invention is configured to include a plurality of time constant circuits that generate different time constants and a time constant selection means that selects the time constant circuit in response to the selection operation by the mode selection means,
It has the feature that different time constant circuits can be selected by the mode selection means. Therefore, the ALC voltage holding time can be selected according to the radio wave type, and the optimum transmission power can be obtained when used in conjunction with a drive control circuit. Further, the degree of freedom in design regarding time constants is improved, and the circuit configuration can be simplified, such as being able to share the same bandpass filter between different voltage types.
第１図は従来のALC回路のブロツク図、第２
図は本発明によるALC回路の一実施例を示すブ
ロツク図である。
１…送信装置、２…電鍵、３…マイクロホン、
４…前段送信回路、５…可変利得増幅器、６…送
信終段部、７…アンテナ、８，１５…ALC回路、
９…ALC電圧発生回路、１０，T1〜T5…時定数
回路、１１…操作パネル、１２…ドライブコント
ロールボリユーム、１３…モード選択ダイヤル、
１４…モード制御回路、１６…時定数選択ダイヤ
ル。
Figure 1 is a block diagram of a conventional ALC circuit, Figure 2 is a block diagram of a conventional ALC circuit.
The figure is a block diagram showing one embodiment of an ALC circuit according to the present invention. 1... Transmitting device, 2... Telephone key, 3... Microphone,
4... Pre-stage transmission circuit, 5... Variable gain amplifier, 6... Transmission final stage section, 7... Antenna, 8, 15... ALC circuit,
9...ALC voltage generation circuit, 10, T1 to T5 ...time constant circuit, 11...operation panel, 12...drive control volume, 13...mode selection dial,
14...Mode control circuit, 16...Time constant selection dial.
Claims (1)
得を制御するALC電圧を出力するALC電圧発生
手段と、送信終段部から出力される高周波送信電
力の電波型式を選択するモード選択手段と、を具
備し、前記ALC電圧に応じて前記可変利得増幅
手段の利得を制御し前記送信終段部を保護するよ
う構成された送信回路に係わるALC回路におい
て、異なる時定数を生成する複数の時定数回路
と、前記モード選択手段による選択動作に対応し
て前記時定数回路を選択する時定数回路選択手段
と、を具備し、選択された時定数回路を介した
ALC電圧で前記可変利得増幅手段を制御するよ
う構成したことを特徴とするALC回路。1. A variable gain amplification means, an ALC voltage generation means for outputting an ALC voltage for controlling the gain of the variable gain amplification means, and a mode selection means for selecting the radio wave type of the high frequency transmission power output from the transmission final stage. a plurality of time constant circuits generating different time constants in an ALC circuit related to a transmitting circuit configured to control the gain of the variable gain amplifying means according to the ALC voltage and protect the transmitting final stage section; and time constant circuit selection means for selecting the time constant circuit in response to the selection operation by the mode selection means,
An ALC circuit characterized in that the ALC voltage is configured to control the variable gain amplification means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15752483A JPS6048608A (en) | 1983-08-29 | 1983-08-29 | Alc circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15752483A JPS6048608A (en) | 1983-08-29 | 1983-08-29 | Alc circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6048608A JPS6048608A (en) | 1985-03-16 |
| JPH025043B2 true JPH025043B2 (en) | 1990-01-31 |
Family
ID=15651549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15752483A Granted JPS6048608A (en) | 1983-08-29 | 1983-08-29 | Alc circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6048608A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5056109A (en) * | 1989-11-07 | 1991-10-08 | Qualcomm, Inc. | Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238805A (en) * | 1975-09-23 | 1977-03-25 | Casio Comput Co Ltd | Receiver |
| JPS53134471A (en) * | 1977-04-25 | 1978-11-24 | Hokushin Electric Works | Automatic gain control circuit |
| JPS54116870A (en) * | 1978-03-02 | 1979-09-11 | Mitsubishi Electric Corp | Automatic gain control circuit of amplifier |
| JPS5732110A (en) * | 1980-08-05 | 1982-02-20 | Mitsubishi Electric Corp | Time-constant switching device |
-
1983
- 1983-08-29 JP JP15752483A patent/JPS6048608A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238805A (en) * | 1975-09-23 | 1977-03-25 | Casio Comput Co Ltd | Receiver |
| JPS53134471A (en) * | 1977-04-25 | 1978-11-24 | Hokushin Electric Works | Automatic gain control circuit |
| JPS54116870A (en) * | 1978-03-02 | 1979-09-11 | Mitsubishi Electric Corp | Automatic gain control circuit of amplifier |
| JPS5732110A (en) * | 1980-08-05 | 1982-02-20 | Mitsubishi Electric Corp | Time-constant switching device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6048608A (en) | 1985-03-16 |
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