Device and method for attenuating an anti-resonant circuit
AssigneeRobert Bosch GmbH
InventorMartin Reiche
Life of this patent
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Abstract
A device for the attenuation of an anti-resonant circuit which has a first capacitor and a secondary inductance. A signal is able to be coupled into the anti-resonant circuit via a primary inductance. An attenuator is connected in parallel to a switching device and to the secondary inductance and/or the primary inductanace.
Claims17
A device for attenuating an anti-resonant circuit having a secondary inductance and a first capacitor comprising:
- a primary inductance adapted to inductively couple a signal into the secondary inductance;
- and
- an attenuator having a switching device, the attenuator connected is parallel to at least one of the primary inductance and the secondary inductance,
- wherein a node between the anti-resonant circuit and the switching device is connected to an inverting input of an operational amplifier, and wherein, in the switching device, a first transistor is situated between the node and a first potential, and a second transistor is situated between the node and a first ground potential, and wherein the control inputs of the first transistor and the second transistor are connected to a signal output of the operational amplifier.
A method for attenuating an anti-resonant circuit having a secondary inductance and a first capacitor, wherein a signal is inductively coupled into the secondary inductance via a primary inductance, and wherein a series circuit, including an attenuator and a switching device is situated in parallel to at least one of the primary inductance and the secondary inductance, the method comprising:
- switching the switching device into a conducting state if the signal is to be attenuated,
- wherein a node between the anti-resonant circuit and the switching device is connected to an inverting input of an operational amplifier, and wherein, in the switching device, a first transistor is situated between the node and a first potential, and a second transistor is situated between the node and a first ground potential;
- and wherein the control inputs of the first transistor and the second transistor are connected to a signal output of the operational amplifier.
Dependencies are inferred from the claim text.