Capacitor discharge circuit
AssigneesKureha Kagaku Kogyo Kabushiki Kaisha, Radio Research & Technical Incorporated
InventorsSeiichi Suzuki, Eihachiro Tomita
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Abstract
A capacitor discharge circuit constructed by a combination of a mechanical switch and an electronic switch. The electronic switch is automatically turned on with a predetermined time delay after closing of the mechanical switch. The mechanical switch is used to completely separate a high voltage-large capacity capacitor from a load when the discharge operation is not required. The wear and tear of contacts in the mechanical switch can be avoided by the delayed operation of the electronic switch.
Claims8
A capacitor discharge circuit for a defibrillator comprising:
- a mechanical switch having mechanical make-contact connected to the output of a capacitor which is charged by a DC high voltage source;
- an electronic switch connected in series to the output of the mechanical switch, the output of said electronic switch being connected to a load;
- a control signal generation circuit for generating a turn-on signal to be supplied to a control input of said electronic switch, said control signal generation circuit being connected to the output of said mechanical switch;
- and
- a DC isolating means for feeding a reduced operation voltage from the output of said mechanical switch to said control signal generation circuit with electrical isolation therebetween, wherein said control signal generation circuit is operated when said mechanical switch is turned on, and said electronic switch is turned on in turn in response to said turn-on signal generated in said control signal generation circuit.
A capacitor discharge circuit for a defibrillator comprising:
- a mechanical switch having mechanical make-contact connected to the output of a capacitor which is charged by a DC high voltage source;
- an electronic switch connected in series to the output of the mechanical switch, the output of said electronic switch being connected to a load;
- a control signal generation circuit for generating a turn-on signal to be supplied to a control input of said electronic switch, said control signal generation circuit being connected to the output of said mechanical switch;
- a DC isolating means for feeding a reduced operation voltage from the output of said mechanical switch to said control signal generation circuit with electrical isolation therebetween;
- and
- a delay circuit for delaying said turn-on signal, the delay time of said delay circuit being a period longer than the chattering operation period of said mechanical switch;
- wherein said control signal generation circuit is operated when said mechanical switch is turned on, and said electronic switch is turned on after the chattering operation period is over in response to said turn-on signal generated in said control signal generation circuit and delayed by said delay circuit.
Dependencies are inferred from the claim text.