JPS5847891B2 - DC regeneration circuit - Google Patents
DC regeneration circuitInfo
- Publication number
- JPS5847891B2 JPS5847891B2 JP52137532A JP13753277A JPS5847891B2 JP S5847891 B2 JPS5847891 B2 JP S5847891B2 JP 52137532 A JP52137532 A JP 52137532A JP 13753277 A JP13753277 A JP 13753277A JP S5847891 B2 JPS5847891 B2 JP S5847891B2
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- signal
- regeneration circuit
- capacitor
- circuit
- 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
Links
Landscapes
- Manipulation Of Pulses (AREA)
Description
【発明の詳細な説明】
本発明は温度による電位変化の少ない直流再生回路に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a DC regeneration circuit with little change in potential due to temperature.
第１図は入力信号の最低電位を基準電位とする従来の直
流再生回路の例を示すもので、端子５に入った第２図ａ
に示される入力信号は、コンデンサ１によって直流分が
カットされ、かつダイオード２によって端子６より加え
られる基準電圧に対してクランプされる。Figure 1 shows an example of a conventional DC regeneration circuit that uses the lowest potential of the input signal as the reference potential.
The DC component of the input signal shown in FIG.
次にこの信号はトランジスタ３、抵抗４を介して出力端
子７からとり出される。Next, this signal is taken out from the output terminal 7 via the transistor 3 and the resistor 4.
第２図ｂはこのようにしてとり出された信号を示す。FIG. 2b shows the signal thus extracted.
このとき信号ｂの最低電位８は、（端子６から加えられ
る基準電位）−（ダイオード２の接合電位差）一（トラ
ンジスタ３のベース接合電位差）となり、後２者により
９に示すような温度ト゛リフトを生ずる。At this time, the lowest potential 8 of signal b is (reference potential applied from terminal 6) - (junction potential difference of diode 2) - (base junction potential difference of transistor 3), and the latter two cause a temperature drift as shown in 9. arise.
このように温度ドリフトが生ずると、部品それぞれの温
度特性を利用して逆補正を行なっても十分ドリフトを除
くことができず、微小信号を直流再生することは従来非
常に困難であった。When temperature drift occurs in this way, it is not possible to sufficiently eliminate the drift even if reverse correction is performed using the temperature characteristics of each component, and it has been extremely difficult to reproduce DC signals from minute signals.
本発明はこのような欠点を除いた直流再生回路を簡単な
め路で実現するものであり、以下本発明の一実施例を図
面をもとに詳細に説明する。The present invention aims to realize a DC regeneration circuit with a simple route that eliminates such drawbacks, and one embodiment of the present invention will be described in detail below with reference to the drawings.
なお図中、第１図と同一機能を有する部分には同一番号
を付すとともに説明を略す。In the figure, parts having the same functions as those in FIG. 1 are given the same numbers and explanations are omitted.
第３図において、端子５に入った入力信号はコンデンサ
１によって直流成分が除かれた後、トランジスタ３のベ
ースに加えられ、トランジスタ３のエミツタからは低イ
ンピーダンスの出力信号が得られる。In FIG. 3, an input signal input to a terminal 5 has its direct current component removed by a capacitor 1, and is then applied to the base of a transistor 3, from which a low impedance output signal is obtained.
この出力信号は増幅器１０で比較電圧６と比較増幅され
、かつダイオード１１とコンデンサ１２と抵抗器１３に
よって定められた時定数でピーク検出された後、ダイオ
ード２を通してトランジスタ３のベースに入力されたト
ランジスタ３のベースバイアスを定める。This output signal is compared and amplified with a comparison voltage 6 in an amplifier 10, and after the peak is detected at a time constant determined by a diode 11, a capacitor 12, and a resistor 13, the output signal is input to the base of a transistor 3 through a diode 2. 3. Determine the base bias.
このような回路によって再生された直流成分の温度ドリ
フトは増幅器１０の利得が十分太きければ増幅器１０の
入カドリフトによって定まり、トランジスタ３の特性に
よらない。The temperature drift of the DC component reproduced by such a circuit is determined by the input drift of the amplifier 10 if the gain of the amplifier 10 is sufficiently large, and is not dependent on the characteristics of the transistor 3.
増幅器１０の温度ドリフトを０．１Ｍｖ７’ｃ以下とす
ることもでき非常に安定な直流再生ができる。The temperature drift of the amplifier 10 can be made less than 0.1 Mv7'c, and very stable DC reproduction can be achieved.
また低インピーダンスの点から直接帰還をかけても直流
再生ができるという特徴を有している。It also has the characteristic of being able to perform direct current regeneration even when direct feedback is applied due to its low impedance.
トランジス３と抵抗４による回路は、帰還信号を加えら
れ得るだけの高インピーダンス部分を含む直流増幅回路
であればどんなものでも良いので、安価な広帯域増幅器
を使用できる。The circuit consisting of the transistor 3 and the resistor 4 may be any DC amplifier circuit as long as it includes a high impedance portion to which a feedback signal can be applied, so that an inexpensive wideband amplifier can be used.
また基準になる比較信号をパルス信号に変更すれば、特
定のタイミングで直流再生することもできる。Furthermore, if the reference comparison signal is changed to a pulse signal, DC reproduction can be performed at a specific timing.
第１図は従来の直流再生回路を示す結線図、第２図は第
１図の回路における信号の温度ドリフトを説明する信号
波形図で、第３図は本発明の一実施例における直流再生
回路の結線図である。
１・・・・・・コンデンサ、２・・・・・・ダイオード
、３・・・・・・トランジスタ、４・・・・・・抵抗、
５・・・・・・入力端子、６・・−・・・基準電圧入力
端子、７・・・・・・出力端子、１０・・・・・・増幅
器、１１・・・・・・ダイオード、１２・・・・・・コ
ンデンサー、１３・・・・・抵抗。Fig. 1 is a wiring diagram showing a conventional DC regeneration circuit, Fig. 2 is a signal waveform diagram explaining the temperature drift of the signal in the circuit of Fig. 1, and Fig. 3 is a DC regeneration circuit in an embodiment of the present invention. FIG. 1... Capacitor, 2... Diode, 3... Transistor, 4... Resistor,
5...Input terminal, 6...-Reference voltage input terminal, 7...Output terminal, 10...Amplifier, 11...Diode, 12... Capacitor, 13... Resistor.
Claims (1)
の直流増幅器の出力側の電圧を基準電圧と比較した後に
ピーク検出し、これをダイオードを介して前記コンデン
サと直流増幅器の入力端との接続中点に帰還する帰還回
路とを有することを特徴とする直流再生回路。1. A DC amplifier whose human power end is connected to a capacitor, and after comparing the voltage on the output side of this DC amplifier with a reference voltage, peak detection is performed, and this is detected while connecting the capacitor and the input end of the DC amplifier via a diode. 1. A direct current regeneration circuit comprising a feedback circuit that returns to a point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52137532A JPS5847891B2 (en) | 1977-11-15 | 1977-11-15 | DC regeneration circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52137532A JPS5847891B2 (en) | 1977-11-15 | 1977-11-15 | DC regeneration circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5469944A JPS5469944A (en) | 1979-06-05 |
| JPS5847891B2 true JPS5847891B2 (en) | 1983-10-25 |
Family
ID=15200872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52137532A Expired JPS5847891B2 (en) | 1977-11-15 | 1977-11-15 | DC regeneration circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5847891B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61260712A (en) * | 1985-05-13 | 1986-11-18 | Oyo Keisoku Kenkyusho:Kk | Waveform shaping circuit |
-
1977
- 1977-11-15 JP JP52137532A patent/JPS5847891B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5469944A (en) | 1979-06-05 |
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