JPH04133516A - Mos fet transistor driving circuit - Google Patents

Mos fet transistor driving circuit

Info

Publication number
JPH04133516A
JPH04133516A JP2255594A JP25559490A JPH04133516A JP H04133516 A JPH04133516 A JP H04133516A JP 2255594 A JP2255594 A JP 2255594A JP 25559490 A JP25559490 A JP 25559490A JP H04133516 A JPH04133516 A JP H04133516A
Authority
JP
Japan
Prior art keywords
transistor
mos fet
output
fet transistor
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.)
Pending
Application number
JP2255594A
Other languages
Japanese (ja)
Inventor
Hideki Yamamoto
山元 秀樹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP2255594A priority Critical patent/JPH04133516A/en
Publication of JPH04133516A publication Critical patent/JPH04133516A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To make the turning-off speed of a MOS FET transistor faster by respectively connecting the collector and the emitter of a bipolar transistor to the gate and the source of the MOS FET transistor and the base of the bipolar transistor to a 2nd output. CONSTITUTION:When a 1st output Q becomes positive from '0' at time t1, a MOS FET transistor Q1 is turned on and its drain current ID starts to flow and accumulates electric charges in the input capacity Ci to the transistor Q1. When the 2nd output, the inverse of Q, of the circuit 1 becomes positive from '0' thereafter at the time t2, the base current IB of a transistor Q2 flows through a base resistor R2 and capacitor C1. The charged voltage V1 generated by the electric charges accumulated in the input capacity Ci is quickly discharged as the collector current IC of the transistor Q2.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はMOS  FETトランジスタの駆動回路に関
し、特にスイッチングOFF時の高速化を図ったMOS
  FETトランジスタ駆動回路に関する。
[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a drive circuit for a MOS FET transistor, and in particular to a MOS FET transistor drive circuit that increases the speed of switching OFF.
The present invention relates to a FET transistor drive circuit.

〔従来の技術〕[Conventional technology]

従来のMOS FETトランジスタの駆動回路における
MOS  FETトランジスタのスイッチングOFF時
の高速化の手段として次の方法があった6即ち、第3図
のMOS  FETトランジスタ駆動回路の回路図に示
すように、MOS  FETトランジスタQ1のゲート
抵抗R1の両端にダイオードD1を並列接続する。そし
て、パルス発生回路10の出力(7)LOW時には、M
OS  FETトランジスタQ1の入力容量Ciによる
充電電荷がダイオードD1を通じて放電するように、M
OS  FETトランジスタQ1のゲートに低インピー
ダンス回路を構成していた。
In the conventional MOS FET transistor drive circuit, the following method has been used to increase the speed of switching OFF of the MOS FET transistor.6 Namely, as shown in the circuit diagram of the MOS FET transistor drive circuit in Figure 3, the MOS FET A diode D1 is connected in parallel to both ends of the gate resistor R1 of the transistor Q1. When the output (7) of the pulse generation circuit 10 is LOW, M
M so that the charge due to the input capacitance Ci of the OS FET transistor Q1 is discharged through the diode D1.
A low impedance circuit was configured at the gate of the OS FET transistor Q1.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかしながら、上述した従来のMOS  FETトラン
ジスタ駆動回路は、パルス発生回路1の圧力部のいわゆ
る扱い込み電流の限度があることと、受動的な回路であ
るため充分な放電電流を流すことができず、MOS  
FET)−ランジスタのスイッチングOFF時の高速化
を図るのが困難であった。
However, the conventional MOS FET transistor drive circuit described above has a limit on the so-called handling current of the pressure section of the pulse generation circuit 1, and because it is a passive circuit, it is not possible to flow a sufficient discharge current. M.O.S.
FET) - It was difficult to increase the switching speed of the transistor when it is turned off.

〔課題を解決するための手段〕[Means to solve the problem]

本発明のMOS FETトランジスタ駆動回路は、繰り
返しパルスを発生するパルス発生回路の第1の圧力によ
り第1の抵抗を介してMOS  FETトランジスタを
0N−OFFスイッチングさせるMOS FETトラン
ジスタ駆動回路において、前記MOSFETトランジス
タのゲートおよびソースにバイポーラトランジスタのコ
レクタおよびエミッタをそれぞれ接続する。そして、前
記バイポーラトランジスタのベースを第2の抵抗とコン
デンサの並列回路を介して前記パルス発生回路の前記第
1の出力の反転波形である第2の出力に接続している。
The MOS FET transistor drive circuit of the present invention is characterized in that the MOS FET transistor is switched ON-OFF via a first resistor by a first pressure of a pulse generation circuit that repeatedly generates pulses. The collector and emitter of the bipolar transistor are connected to the gate and source of the bipolar transistor, respectively. The base of the bipolar transistor is connected to a second output, which is an inverted waveform of the first output, of the pulse generation circuit through a parallel circuit of a second resistor and a capacitor.

〔実施例〕〔Example〕

次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第1図は本発明の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention.

図において、1は互いに相反する2出力の繰り返しパル
スを発生するパルス発生回路、R1はパルス発生回路1
の第1の出力とMOS  FETトランジスタQ1のゲ
ートとの間に接続されたゲート抵抗である。本実施例で
は、更に、MO3FETトランジスタQ1のゲートおよ
びソースにnpn型トランジスタQ2のコレクタおよび
エミッタをそれぞれ接続し、かつトランジスタQ2のベ
ース端子をベース抵抗R2とコンデンサC1の並列回路
を介してパルス発生回路1の第1の出力の反転波形であ
る第2の出力に接続している。
In the figure, 1 is a pulse generation circuit that generates repeated pulses with two contradictory outputs, and R1 is a pulse generation circuit 1.
A gate resistor connected between the first output of Q1 and the gate of MOS FET transistor Q1. In this embodiment, the collector and emitter of an npn transistor Q2 are connected to the gate and source of the MO3FET transistor Q1, respectively, and the base terminal of the transistor Q2 is connected to a pulse generating circuit through a parallel circuit of a base resistor R2 and a capacitor C1. 1 is connected to a second output which is an inverted waveform of the first output.

次に、第1図の実施例の動作について、第2図に示すそ
の動作波形を示す図を参照しながら説明する。
Next, the operation of the embodiment shown in FIG. 1 will be explained with reference to a diagram showing its operation waveforms shown in FIG.

まず、時刻t1において、パルス発生回路1の第1の出
力Qが零から正になると、MOS  FETトランジス
タQ1かONにスイッチングされ、そのドレイン電流I
oが流れる。そしてMO3FETトランジスタQ1への
入力容量Ciに電荷を蓄積する。
First, at time t1, when the first output Q of the pulse generation circuit 1 becomes positive from zero, the MOS FET transistor Q1 is switched ON, and its drain current I
o flows. Charge is then accumulated in the input capacitor Ci to the MO3FET transistor Q1.

次に、時刻t2において、パルス発生回路1の第2の出
力でか零から正になると、ベース抵抗R2とコンデンサ
C1を通じてトランジスタQ2のベース電流■8が流れ
、MOS  FETトランジスタQ1の08時にその入
力容量Ciに蓄積された電荷による充電電圧■1はトラ
ンジスタQ2のコレクタ電流Icとなって急速に放電す
る。
Next, at time t2, when the second output of the pulse generating circuit 1 becomes positive from zero, the base current 8 of the transistor Q2 flows through the base resistor R2 and the capacitor C1, and its input at 8 o'clock of the MOS FET transistor Q1 flows through the base resistor R2 and the capacitor C1. The charging voltage (1) due to the charges accumulated in the capacitor Ci becomes the collector current Ic of the transistor Q2 and is rapidly discharged.

MOS FETトランジスタQ1がOFFにスイッチさ
れるときには、そのゲート回路には充分な低インピーダ
ンス回路が構成され、MOS  FETトランジスタQ
1のOFF時のスイッチング高速化を可能とする。以下
、時刻t3では時刻t2の状態に戻る。
When MOS FET transistor Q1 is switched OFF, a sufficiently low impedance circuit is configured in its gate circuit, and MOS FET transistor Q1 is switched OFF.
This makes it possible to increase the switching speed when 1 is OFF. Thereafter, at time t3, the state returns to the state at time t2.

ここで、トランジスタQ2のベース抵抗R2は、MOS
 FETトランジスタQ1の08時にはコンデンサC1
の蓄積電荷を十分放電し、かつ、MOS FETトラン
ジスタQ1の08時の動作には影響を与えないような値
に選定される。
Here, the base resistance R2 of the transistor Q2 is MOS
Capacitor C1 at 08 of FET transistor Q1
The value is selected so as to sufficiently discharge the accumulated charge of the MOS FET transistor Q1 and not affect the operation of the MOS FET transistor Q1 at 08:00.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、繰り返しパルスを発生す
るパルス発生回路の第1の出力に接続されたゲート抵抗
とMOS  FETl−ランジスタよりなるMOS  
FET)−ランジスタ駆動回路において、MOS  F
ETトランジスタのゲートとソースにバイポーラトラン
ジスタのコレクタとエミッタをそれぞれ接続し、バイポ
ーラトランジスタのベースを抵抗とコンデンサの並列回
路を介してパルス発生回路の第1の出力の反転波形であ
る第2の圧力に接続することにより、MOS  FET
トランジスタの入力容量に蓄積された電荷をMOS  
FETトランジスタのOFFスイッチ時において急速に
放電することが可能である。その結果、MOS FET
トランジスタのスイッチングOFF時における高速化を
容易に実現できる効果がある。
As explained above, the present invention provides a MOS transistor consisting of a gate resistor and a MOS FET transistor connected to the first output of a pulse generating circuit that repeatedly generates pulses.
FET) - In transistor drive circuit, MOS F
The collector and emitter of a bipolar transistor are connected to the gate and source of the ET transistor, respectively, and the base of the bipolar transistor is connected to a second pressure, which is an inverted waveform of the first output of the pulse generation circuit, through a parallel circuit of a resistor and a capacitor. By connecting MOS FET
The charge accumulated in the input capacitance of the transistor is transferred to the MOS
It is possible to discharge rapidly when the FET transistor is switched off. As a result, the MOS FET
This has the effect of easily achieving higher speed when the transistor is switched off.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例を示す回路図、第2図はその
動作波形を示す図、第3図は従来例を示す回路図である
。 1.10・・・パルス発生回路、R1・・ゲート抵抗、
R2・・・ベース抵抗、Ql・・・MOS  FET)
−ランジスタ、C2・・・トランジスタ、Ci・・・入
力容量、C1・・・コンデンサ、Dl・・・ダイオード
FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing its operating waveforms, and FIG. 3 is a circuit diagram showing a conventional example. 1.10...Pulse generation circuit, R1...Gate resistance,
R2...Base resistance, Ql...MOS FET)
- transistor, C2...transistor, Ci...input capacitance, C1...capacitor, Dl...diode.

Claims (1)

【特許請求の範囲】[Claims] 繰り返しパルスを発生するパルス発生回路の第1の出力
により第1の抵抗を介してMOSFETトランジスタを
ON−OFFスイッチングさせるMOSFETトランジ
スタ駆動回路において、前記MOSFETトランジスタ
のゲートおよびソースにバイポーラトランジスタのコレ
クタおよびエミッタをそれぞれ接続し、かつ前記バイポ
ーラトランジスタのベースを第2の抵抗とコンデンサの
並列回路を介して前記パルス発生回路の前記第1の出力
の反転波形である第2の出力に接続したことを特徴とす
るMOSFETトランジスタ駆動回路。
In a MOSFET transistor drive circuit that ON-OFF switches a MOSFET transistor via a first resistor by a first output of a pulse generation circuit that repeatedly generates pulses, the collector and emitter of a bipolar transistor are connected to the gate and source of the MOSFET transistor. and the base of the bipolar transistor is connected to a second output, which is an inverted waveform of the first output, of the pulse generation circuit through a parallel circuit of a second resistor and a capacitor. MOSFET transistor drive circuit.
JP2255594A 1990-09-26 1990-09-26 Mos fet transistor driving circuit Pending JPH04133516A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2255594A JPH04133516A (en) 1990-09-26 1990-09-26 Mos fet transistor driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2255594A JPH04133516A (en) 1990-09-26 1990-09-26 Mos fet transistor driving circuit

Publications (1)

Publication Number Publication Date
JPH04133516A true JPH04133516A (en) 1992-05-07

Family

ID=17280897

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2255594A Pending JPH04133516A (en) 1990-09-26 1990-09-26 Mos fet transistor driving circuit

Country Status (1)

Country Link
JP (1) JPH04133516A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9331097B2 (en) 2014-03-03 2016-05-03 International Business Machines Corporation High speed bipolar junction transistor for high voltage applications

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9331097B2 (en) 2014-03-03 2016-05-03 International Business Machines Corporation High speed bipolar junction transistor for high voltage applications

Similar Documents

Publication Publication Date Title
JP2585284B2 (en) Power MOSFET gate drive circuit
US7453292B2 (en) Resonant gate drive circuit with centre-tapped transformer
AU726077B2 (en) Gate control circuit for voltage drive switching element
JPH02215222A (en) Drive signal generator for transrator which is connected to half bridge mode
JPH0856139A (en) Clock generator
JPS5826568A (en) Snubber circuit for power switching transistor
JPH10108477A (en) Inverter circuit
EP0395146B1 (en) Control circuit for at least one clock electrode of an integrated circuit
JPH08149796A (en) Drive circuit for voltage driven switch element
US20040145918A1 (en) Inverter device capable of reducing through-type current
JPH04133516A (en) Mos fet transistor driving circuit
JPH02113622A (en) Mosfet transistor driving circuit
EP1264402B1 (en) Drive circuit and method for mosfet
JPH08149826A (en) Power converter
JP2003189590A (en) Controller for voltage drive type semiconductor elements connected in series
JP4581231B2 (en) Gate drive circuit for voltage driven semiconductor device
JPH0382362A (en) Gate driving circuit
JPH01155715A (en) Gate drive circuit for semiconductor switching element
JPH07111446A (en) Gate driver for voltage driven semiconductor element
JP7236335B2 (en) switching device
CN209417172U (en) A kind of analog voltage step instrument
JP3436122B2 (en) Bridge type inverter circuit
JP2004147452A (en) Gate drive circuit
JP2004282806A (en) Drive circuit of voltage drive element
JPH04128435U (en) Isolated drive circuit for power MOS FET