JPH0480130U - - Google Patents
Info
- Publication number
- JPH0480130U JPH0480130U JP12441490U JP12441490U JPH0480130U JP H0480130 U JPH0480130 U JP H0480130U JP 12441490 U JP12441490 U JP 12441490U JP 12441490 U JP12441490 U JP 12441490U JP H0480130 U JPH0480130 U JP H0480130U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- constant current
- control transistor
- current control
- sawtooth wave
- 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
Links
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Control Of Electrical Variables (AREA)
- Dc-Dc Converters (AREA)
Description
第１図はこの考案の一実施例による鋸歯状波発
生回路を示すブロツク図、第２図は定電流制御用
トランジスタにＰＮＰ形トランジスタを使用した
他の実施例を示すブロツク図、第３図は鋸歯状波
を発生しない休止期間中は定電流回路の動作を停
止するようにした本考案のさらに他の実施例を説
明する回路図、第４図は従来回路を示すブロツク
図である。
図において、１は直流電源、２はコンデンサ、
３はトランジスタ、４，５は抵抗、６は定電圧ダ
イオード、７は放電用スイツチ、８はフローテイ
ング電源を示す。なお、図中、同一符号は同一、
または相当部分を示す。
Fig. 1 is a block diagram showing a sawtooth wave generating circuit according to one embodiment of this invention, Fig. 2 is a block diagram showing another embodiment in which a PNP type transistor is used as the constant current control transistor, and Fig. 3 is a block diagram showing another embodiment in which a PNP type transistor is used as the constant current control transistor. FIG. 4 is a circuit diagram illustrating still another embodiment of the present invention in which the operation of the constant current circuit is stopped during a rest period in which a sawtooth wave is not generated. FIG. 4 is a block diagram showing a conventional circuit. In the figure, 1 is a DC power supply, 2 is a capacitor,
3 is a transistor, 4 and 5 are resistors, 6 is a constant voltage diode, 7 is a discharge switch, and 8 is a floating power supply. In addition, in the figure, the same reference numerals are the same,
or a significant portion.
Claims (1)
得るための回路構成で、定電流制御用トランジス
タのベース電流をフローテイングした電源より得
たことを特徴とする鋸歯状波発生回路。 A sawtooth wave generation circuit has a circuit configuration for obtaining a peak voltage of a sawtooth waveform approximating the power supply voltage, and is characterized in that the base current of a constant current control transistor is obtained from a floating power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12441490U JPH0480130U (en) | 1990-11-26 | 1990-11-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12441490U JPH0480130U (en) | 1990-11-26 | 1990-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0480130U true JPH0480130U (en) | 1992-07-13 |
Family
ID=31872066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12441490U Pending JPH0480130U (en) | 1990-11-26 | 1990-11-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0480130U (en) |
-
1990
- 1990-11-26 JP JP12441490U patent/JPH0480130U/ja active Pending