JPS6190325U

JPS6190325U -

Info

Publication number: JPS6190325U
Application number: JP17638584U
Authority: JP
Priority date: 1984-11-20
Filing date: 1984-11-20
Publication date: 1986-06-12

Description

[Brief explanation of the drawing]

第１図ないし第３図はこの考案のトランジスタ
のベースドライブ回路の実施例の要部を示し、第
１図は第１実施例の電源回路の結線図、第２図お
よび第３図は他の実施例を示し、第２図は電源回
路の結線図、第３図は電圧検知回路の結線図、第
４図は一般のベースドライブ回路の結線図、第５
図ａ〜ｄはそれぞれ第４図の各点の定常時におけ
る波形図、第６図は従来の電源回路の結線図、第
７図はインバータの主回路の結線図、第８図はダ
ーリントントランジスタの内部等価回路図、第９
図は電源オフ時から正、負電源電圧がほぼ０Ｖに
落ちつくまでの各部のタイミングを示し、同図ａ
は正、負電源電圧の波形図、同図ｂ〜ｅはそれぞ
れ第５図ａ〜ｄに対応する波形図、同図ｆはダー
リントントランジスタのベース電流の波形図であ
る。１…ドライブ制御回路、３…コンパレータ、４
…プツシユプル回路、５′，５″…電源回路、１
１…ダーリントントランジスタ、１２…放電抵抗
、１３…短絡用トランジスタ。 1 to 3 show the main parts of an embodiment of the transistor base drive circuit of this invention, FIG. 1 is a wiring diagram of the power supply circuit of the first embodiment, and FIGS. Embodiments are shown, and Fig. 2 is a wiring diagram of a power supply circuit, Fig. 3 is a wiring diagram of a voltage detection circuit, Fig. 4 is a wiring diagram of a general base drive circuit, and Fig. 5 is a wiring diagram of a general base drive circuit.
Figures a to d are waveform diagrams at each point in Figure 4 during steady state, Figure 6 is a wiring diagram of a conventional power supply circuit, Figure 7 is a wiring diagram of an inverter's main circuit, and Figure 8 is a diagram of a Darlington transistor. Internal equivalent circuit diagram, No. 9
The figure shows the timing of each part from when the power is turned off until the positive and negative power supply voltages settle to approximately 0V.
are waveform diagrams of positive and negative power supply voltages, b to e are waveform diagrams corresponding to FIGS. 5a to d, respectively, and f is a waveform diagram of the base current of the Darlington transistor. 1... Drive control circuit, 3... Comparator, 4
...Push-pull circuit, 5', 5''...Power supply circuit, 1
1... Darlington transistor, 12... discharge resistor, 13... short circuit transistor.

Claims

[Scope of utility model registration request]

a Darlington transistor drive control circuit, a power supply circuit that supplies positive and negative power supply voltages, and a comparator that is driven by the positive and negative power supply voltages of the power supply circuit and operates in negative logic according to the control output of the drive control circuit; In the transistor base drive circuit, the transistor base drive circuit includes a push-pull circuit that is operated by the output signal of the comparator and drives the base of the Darlington transistor by a push-pull output, and the power supply circuit is configured to cause the positive power supply voltage to rise faster than the negative power supply voltage when the power is turned off. Transistor base drive circuit with short circuit to lower.