Circuit arrangement for generating a pulse width modulated signal for driving electrical loads
First Claim
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1. Circuit arrangement for the pulse width modulated drive of a load connected to a voltage supply line, including:
- voltage control/switch means interposed between the said supply line and the load, and adapted to be controlled in a conduction state according to a predetermined duty cycle; and
capacitive filter means, placed downstream of the said voltage control/switch means, in parallel with the load,comprising controlled current sink means, connected to the said capacitive filter means, and adapted to operate as a sink of a current provided by the discharge of the energy stored by the said capacitive filter means,the said current sink means being adapted to be switched to an activated state when the said voltage control/switch means are non-conducting, and to an inactive state when the said voltage control/switch means are conducting.
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Abstract
What is described is a circuit arrangement for the pulse width modulated drive of a load connected to a voltage supply line, including:
- a voltage control/switch device interposed between the supply line and the load, and adapted to be controlled as to their conduction according to a predetermined duty cycle;
- a capacitive filter, placed downstream of the said voltage control/switch means, in parallel with the load, and
- a controlled current sink, connected to the capacitive filter, and adapted to operate as a sink of the current created by the discharge of the energy stored by the capacitive filter, which is switched to an activated state when the voltage control/switch device is non-conducting and is switched to an inactive state when the voltage control/switch device is conducting.
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Citations
10 Claims
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1. Circuit arrangement for the pulse width modulated drive of a load connected to a voltage supply line, including:
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voltage control/switch means interposed between the said supply line and the load, and adapted to be controlled in a conduction state according to a predetermined duty cycle; and capacitive filter means, placed downstream of the said voltage control/switch means, in parallel with the load, comprising controlled current sink means, connected to the said capacitive filter means, and adapted to operate as a sink of a current provided by the discharge of the energy stored by the said capacitive filter means, the said current sink means being adapted to be switched to an activated state when the said voltage control/switch means are non-conducting, and to an inactive state when the said voltage control/switch means are conducting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification