Power output stage having a darlington-pair circuit for switching an inductive load, especially the ignition coil of an
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0030493
(1993-05-25)
|
우선권정보 |
DE-4030418 (1990-09-26) |
국제출원번호 |
PCT/DE91/00712
(1991-09-07)
|
§371/§102 date |
1993May2
(1993May2)
|
국제공개번호 |
WO-9205364
(1992-04-02)
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발명자
/ 주소 |
- Hhne Gerd (Ludwigsburg DEX) Michel Hartmut (Reutlingen DEX) Gademann Lothar (Rottenburg/N DEX) Bodig
- deceased Bernd (late of Schwieberdingen DEX by Maria Bodig
- heir)
|
출원인 / 주소 |
- Robert Bosch GmbH (Stuttgart DEX 03)
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
0 |
초록
▼
A power output stage has a Darlington-pair circuit (11, 12) for switching an inductive load, especially the ignition coil of an internalcombustion engine. In order to predetermine the operating mode of the power output stage, a switch (24) is provided which bridges the base-emitter junction of the D
A power output stage has a Darlington-pair circuit (11, 12) for switching an inductive load, especially the ignition coil of an internalcombustion engine. In order to predetermine the operating mode of the power output stage, a switch (24) is provided which bridges the base-emitter junction of the Darlington-pair circuit (11, 12), is closed in the event of a quick disconnection of the output stage, and is opened in the event of a voltage-limited disconnection of the output stage. A voltage divider, which consists of at least two resistors (16, 18) and bridges the switching junction of the Darlington-pair circuit (11, 12), is connected by means of its pick-off to the junction point between the switch (24) and the base of the Darlington-pair circuit (11, 12), the switch (24) being connected in parallel with a part (18) of the voltage divider. When the switch (24) is open, the Darlington-pair circuit is consequently raised again upon reaching a lower limiting voltage of, for example, 35 volts over the resistor (16), so that, in the case of driving an ignition coil, a spark-free disconnection is achieved. Only a very few, simple and cheap components are required for this purpose.
대표청구항
▼
A power output stage for controlling an inductive load coupled to the power output stage and a power source, comprising: a Darlington circuit including a preliminary-control transistor and an output transistor, a collector of the preliminary-control transistor being coupled to a collector of the out
A power output stage for controlling an inductive load coupled to the power output stage and a power source, comprising: a Darlington circuit including a preliminary-control transistor and an output transistor, a collector of the preliminary-control transistor being coupled to a collector of the output transistor, an emitter of the preliminary-control transistor being coupled to a base of the output transistor; a voltage divider including a first resistor, a first diode, and a second resistor, a first terminal of a series combination of the first resistor and the first diode being coupled to the collector of the preliminary-control transistor, a second terminal of the series combination of the first resistor and the first diode being coupled to a first terminal of the second resistor, a second terminal of the second resistor being coupled to an emitter of the output transistor; a decoupling diode, a first terminal of the decoupling diode being coupled to a base of the preliminary-control transistor and a second terminal of the decoupling diode being coupled to the second terminal of the series combination of the first resistor and the first diode; and an auxiliary transistor, a collector of the auxiliary transistor being coupled to the collector of the output transistor, an emitter of the auxiliary transistor being coupled to the base of the output transistor, a base of the auxiliary transistor being coupled to the second terminal of the series combination of the first resistor and the first diode, wherein conduction of the power output stage is controlled by a controller coupled between the base of the preliminary-control transistor and the emitter of the output transistor.
이 특허를 인용한 특허 (3)
-
Stoddard Robert J. (Lincoln MA) Orange ; II Daniel P. (Worcester MA) Peppiette Roger C. (Colinton GB6), Bipolar driver circuit including primary and pre-driver transistors.
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Meinders Horst,DEX ; Schleupen Richard,DEX, Ignition output stage.
-
Itoh Naoki,JPX ; Nakayama Manabu,JPX, Output circuit with output voltage controlled by current flow through an output transistor circuit.
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