JPS5949005A - Waveform shaping circuit of pulse signal - Google Patents
Waveform shaping circuit of pulse signalInfo
- Publication number
- JPS5949005A JPS5949005A JP16002582A JP16002582A JPS5949005A JP S5949005 A JPS5949005 A JP S5949005A JP 16002582 A JP16002582 A JP 16002582A JP 16002582 A JP16002582 A JP 16002582A JP S5949005 A JPS5949005 A JP S5949005A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- sine wave
- circuit
- digital signal
- pulse signal
- 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
- 238000007493 shaping process Methods 0.000 title claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は時刻あるいは曲番号等を表示する符号化された
多ビツトディジタル信号を正弦波信号に変換するパルス
信号波形整形回路に関する。DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a pulse signal waveform shaping circuit that converts an encoded multi-bit digital signal indicating time, song number, etc. into a sine wave signal.
（ロ）背景技術
近頃テープレコーダにおいて、録音開始時刻、録音した
曲の番号、あるいは録音位置を示す信号を録音し、再生
時に前記録音開始時間等が分るよう、にすることが行な
われている。前記録音開始時刻等は通常４ビットディジ
タル信号で表わされており、録音開始時に内蔵されてい
る時計を操作し、そのときの時刻を表わす４ビットディ
ジタル信号を預生さぜ、その４ビットディジタル信号を
、磁気ヘッドを介してテープに録音し、再生時には前記
テープに録音している４ビットディジタル信号を磁気ヘ
ッドで再生し、再生された４ビットディジタル信号で表
示装置をドライブし、前記録音開始時刻が前記表示装置
より読み取れるようにしている。前記録音開始時刻等を
表わす４ビットディジタル信号は可聴周波数外の１０〜
１５Ｈｚの低周波が用いられているが、テープに録音す
ると再生時に雑音が発生し聴感上好ましくない。これは
上記録音開始時刻を表わすのにディジタル信号を用いて
いるので、信号と信号とのつなぎ目で急激に信号レベル
が変るからである。斯ろ欠点を除去するには前述の録音
開始時刻、曲の番号、あるいは録音位置等を表わす符号
化された多ピントディジタル信号、即ち４ビットディジ
タル信号を正弦波信号に変換しつなぎ目をゼロクロスと
し、その正弦波信号を録音すればよい。(B) Background Art Recently, tape recorders have been used to record signals indicating the recording start time, the number of the recorded song, or the recording position, so that the recording start time, etc. can be seen during playback. . The recording start time, etc. is usually represented by a 4-bit digital signal, and when recording starts, the built-in clock is operated and the 4-bit digital signal representing the time is recorded, and the 4-bit digital signal is A signal is recorded on a tape via a magnetic head, and during playback, the 4-bit digital signal recorded on the tape is played back with the magnetic head, the reproduced 4-bit digital signal drives a display device, and the recording is started. The time can be read from the display device. The 4-bit digital signal representing the recording start time, etc.
A low frequency of 15 Hz is used, but when recorded on tape, noise is generated during playback, which is not pleasing to the listener. This is because, since a digital signal is used to represent the recording start time, the signal level changes rapidly at the junction between signals. In order to eliminate this defect, the encoded multi-pin digital signal representing the recording start time, song number, recording position, etc., that is, a 4-bit digital signal, is converted into a sine wave signal, and the joint is set as a zero cross. All you have to do is record the sine wave signal.
し→ 問題点を解決するための手段
本発明は斯る場合に用いられる符号化された多ビツトデ
ィジタル信号を正弦波信号に変換するパルス信号波形整
形回路を提供するものである。Means for Solving the Problems The present invention provides a pulse signal waveform shaping circuit that converts the encoded multi-bit digital signal used in such a case into a sine wave signal.
に）実施例
以下本発明を図面に従って説明すると、（１）は基準と
なるパルス信号を発生するパルス信号発生回路、（２）
は前記パルス信号を分周する分周回路、（３）は時刻等
を表わす符号化された多ビツトディジクル信号を発生す
るディジ久ル信号発生回路、（４）はｉヌン°°り１し
前記多ビツトディジクル信号を７９７４号に変換するパ
ラレルシリアル変換回路、（５）は前記パルス信号を正
弦波信号に変換する正弦波変換回路で、直列に接続した
二組の積分回路よりなる。（６）は前記正弦波変換回路
で変換した正弦波信号をスイッチングするトランジスタ
で、前記パラレルシリアでオンオフされる。（７）は増
幅回路、（８）は磁気ヘッドである。(2) Examples The present invention will be described below with reference to the drawings. (1) is a pulse signal generation circuit that generates a reference pulse signal; (2)
(3) is a digital signal generation circuit that generates a coded multi-bit digital signal representing time, etc., and (4) is a digital signal generation circuit that divides the frequency of the pulse signal. A parallel-to-serial conversion circuit (5) converts the bit digital signal into No. 7974, and (5) is a sine wave conversion circuit that converts the pulse signal into a sine wave signal, which is composed of two sets of integrating circuits connected in series. (6) is a transistor that switches the sine wave signal converted by the sine wave conversion circuit, and is turned on and off by the parallel serial circuit. (7) is an amplifier circuit, and (8) is a magnetic head.
次に本発明の動作につ（・て説明する。今パルス信号発
生回路（１）より基準となるパルス信号（第２図Ｅ）を
発生する。そのパルス信号は正弦波変換回路（５）にて
正弦波信号（第２図Ｈ）に変換される。Next, the operation of the present invention will be explained.The pulse signal generation circuit (1) generates a reference pulse signal (Fig. 2E).The pulse signal is sent to the sine wave conversion circuit (5). The signal is then converted into a sine wave signal (Fig. 2H).
一方ディジタル信号発生回路（３）を操作することによ
って前記パルス信号に同期して例えば録音開始時刻を表
わす４ビットディジクル信号（第２図Ａ、Ｔ３．Ｃ，Ｄ
）を発生する。図においては一例として８時１２分の録
音開始時刻を表わす場合を示しており、４ビットディジ
タル信号（第２図Ａ、Ｂ。On the other hand, by operating the digital signal generation circuit (3), a 4-bit digital signal (Fig. 2A, T3.C, D
) occurs. The figure shows, as an example, a case where the recording start time of 8:12 is expressed, and a 4-bit digital signal (Fig. 2 A, B) is used.
Ｃ，’Ｄ）は最初［１，Ｃ）００）となり、次のタイミ
ングでは［０００１］どなり、さらに次のタイミングで
［００１０：］となる。これらパラレルのディジタル信
号はパラレルシリアル変換回路（４）において、前記パ
ルス信号（第２図Ｅ）を分周回路（２）にて１／４分周
して得た分周パルス信号でもってコントロールされ１−
ビットのシリアルディジタル信号（１００００００１０
０１０）（第２図Ｆ）に変換される。このシリアルディ
ジタル信号はインバータ（鴎でインバートされ（第２図
Ｇ）、トランジスタ（６）のベースに加えられる。する
と前記トランジスタ（６）は前記インバートされたシリ
アルディジタル信号（第２図Ｇ）がレベル゛０”のとき
のみオフし、他の期間はオンしているので、前記トラン
ジスタ（６）がオフしている期間のみ前記正弦波信号を
通過する。従って増幅回路（７）には前記シリアルディ
ジタル信号（第２図Ｆ）に相当する正弦波化された記号
信号（第２図■）が加えられ、増幅される。然る後磁気
ヘッド（８）に加わりテープ（９）に録音される。C,'D) becomes [1,C)00) at first, becomes [0001] at the next timing, and becomes [0010:] at the next timing. These parallel digital signals are controlled by a frequency-divided pulse signal obtained by dividing the pulse signal (Fig. 2 E) by 1/4 in a frequency dividing circuit (2) in a parallel-to-serial converter (4). 1-
bit serial digital signal (100000010
010) (FIG. 2F). This serial digital signal is inverted by an inverter (G in Fig. 2) and applied to the base of the transistor (6).Then, the transistor (6) receives the level of the inverted serial digital signal (G in Fig. 2). Since the transistor (6) is turned off only when the signal is "0" and is turned on during other periods, the sine wave signal passes through the sine wave signal only during the period when the transistor (6) is turned off.Therefore, the amplifier circuit (7) A sinusoidal symbol signal (■ in Fig. 2) corresponding to the signal (F in Fig. 2) is added and amplified.Then, it is applied to a magnetic head (8) and recorded on a tape (9).
再生時には磁気へ７ド（８）にて再生された前記記号信
号をシリアルディジタル信号に変換し、さらにそのシリ
アルディジタル信号をパラレルディジタル信号に変換す
ることによって（第２図Ａ、１３、Ｃ，Ｄ）に示す４ビ
ットディジタル信号が得られるので、その４ビットディ
ジタル信号でもって表示装置を駆動し、前記録音開始時
刻を表示することができる。During reproduction, the symbol signal reproduced by the magnet 7 (8) is converted into a serial digital signal, and the serial digital signal is further converted into a parallel digital signal (Fig. 2 A, 13, C, D). Since the 4-bit digital signal shown in ) is obtained, the display device can be driven with the 4-bit digital signal to display the recording start time.
（ホ）効果
本発明のパルス信号波形整形回路は上述した如（、パル
ス信号を正弦波信号に変換１°る一方、前記パルス信号
に同期して発生した時刻等を表わす多ピットディジタル
信号をシリアルディジタル信号に変換し、該シリアルデ
ィジタル信号にてスイッチ回路をオンオフし、前記正弦
波信号を選択的に通過させるようにしたので、極めて簡
単な回路にして多ビツトディジタル信号をそれに対応す
る正弦波信号に変換できる。従ってテープレコーダ等に
おいて時刻等を表わす多ビツトディジタル信号を録音す
る際、正弦波信号に変換し録音できるので、従来問題と
されて℃・た雑音がない良好な録音ができる。(e) Effect The pulse signal waveform shaping circuit of the present invention converts a pulse signal into a sine wave signal as described above, and serially converts a multi-pit digital signal representing time etc. generated in synchronization with the pulse signal. The sine wave signal is converted into a digital signal, the switch circuit is turned on and off using the serial digital signal, and the sine wave signal is selectively passed. Therefore, the multi-bit digital signal can be converted into the corresponding sine wave signal using an extremely simple circuit. Therefore, when recording a multi-bit digital signal representing time or the like with a tape recorder or the like, it can be converted into a sine wave signal and recorded, so good recording can be made without the noise that has been a problem in the past.
第１図は本発明のパルス信号波形整形回路図、第２図は
本発明の各部の信号波形図である。
（１）・・・パルス信号発生回路、（３）・・・ディジ
タル信号発生回路、（４）・・・バグレルシリアル変換
回路、（５）・・・正弦波変換回路、（６）・・・トラ
ンジスタ。
第１１２
第２図
■FIG. 1 is a pulse signal waveform shaping circuit diagram of the present invention, and FIG. 2 is a signal waveform diagram of each part of the present invention. (1)... Pulse signal generation circuit, (3)... Digital signal generation circuit, (4)... Bagrel serial conversion circuit, (5)... Sine wave conversion circuit, (6)...・Transistor. 112 Figure 2■
Claims (1)
記パルス信号を正弦波信号に変換する正弦波変換回路と
、前記パルス信号に同期する符号化された多ビツトディ
ジタル信号を発生するディジタル信号発生回路と、前記
多ビツトディジタル信号をシリアルディジタル信号に変
換するパラレルシリアル変換回路と、該シリアルディジ
タル信号ててオンオフし前記正弦波信号を選択的に通過
させるスイッチ回路とよりなるパルス信号波形整形回路
。(1) A pulse signal generation circuit that generates a pulse signal, a sine wave conversion circuit that converts the pulse signal into a sine wave signal, and a digital signal generator that generates an encoded multi-bit digital signal that is synchronized with the pulse signal. A pulse signal waveform shaping circuit comprising: a parallel-to-serial conversion circuit for converting the multi-bit digital signal into a serial digital signal; and a switch circuit for turning on and off the serial digital signal and selectively passing the sine wave signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16002582A JPS5949005A (en) | 1982-09-13 | 1982-09-13 | Waveform shaping circuit of pulse signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16002582A JPS5949005A (en) | 1982-09-13 | 1982-09-13 | Waveform shaping circuit of pulse signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5949005A true JPS5949005A (en) | 1984-03-21 |
| JPH033973B2 JPH033973B2 (en) | 1991-01-21 |
Family
ID=15706334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16002582A Granted JPS5949005A (en) | 1982-09-13 | 1982-09-13 | Waveform shaping circuit of pulse signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5949005A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62120823A (en) * | 1985-11-19 | 1987-06-02 | テンパ−ル工業株式会社 | Far infrared heating cooker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5062616A (en) * | 1973-10-05 | 1975-05-28 |
-
1982
- 1982-09-13 JP JP16002582A patent/JPS5949005A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5062616A (en) * | 1973-10-05 | 1975-05-28 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62120823A (en) * | 1985-11-19 | 1987-06-02 | テンパ−ル工業株式会社 | Far infrared heating cooker |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH033973B2 (en) | 1991-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3919915A (en) | Electronic musical conductor | |
| KR900005420A (en) | PCM audio data recorder | |
| JPH05297867A (en) | Synchronous playing device | |
| JPS5949005A (en) | Waveform shaping circuit of pulse signal | |
| KR0138464B1 (en) | Video flexible media on which chord data is recorded and its playback device | |
| JPS63317979A (en) | Sound signal correcting device | |
| JPH0334165A (en) | Multi-track audio device | |
| KR0163282B1 (en) | Method for controlling a voice signal | |
| JPS62239198A (en) | Voice reproduction circuit | |
| JP3171192B2 (en) | Music player | |
| JPS6060004U (en) | karaoke equipment | |
| JPH04238392A (en) | Music reproducing device | |
| JPS59175005A (en) | Acoustic device with ic memory | |
| JPS6175396A (en) | Scale converter | |
| JP3312654B2 (en) | Magnetic recording device and magnetic reproducing device | |
| JPS6129454A (en) | Method for transmitting digital sound signal | |
| KR910010494A (en) | Synchronous recording circuit of digital audio tape recorder and compact disc player | |
| JPS6289100A (en) | Voice generator | |
| JPS6213680B2 (en) | ||
| JPS6093606A (en) | Magnetic recording and reproducing device | |
| JPH02105367A (en) | Digital sound signal reproducer | |
| JPS61169899A (en) | double speed playback device | |
| JPS59185010A (en) | Digital data recorder | |
| JPS58143405A (en) | Remote control circuit for time-axis compressing and expanding device | |
| JPS6396785A (en) | Magnetic recording and reproducing device |