Power dissipation-optimized high-frequency coupling capacitor and rectifier circuit
First Claim
1. An integrated lateral high-frequency coupling capacitor for a rectifier circuit having a substrate and at least one capacitance finger in the form of a strip arranged on a front side of the substrate, the coupling capacitor comprising:
- at least one electrically conductive cathode layer that is contacted at a front side through at least one cathode contact strip and has a parasitic series resistance resulting from a ratio of a sheet resistance length to a sheet resistance width within the cathode layer; and
at least one electrically conductive anode layer that is insulated from the cathode layer by a dielectric and that is electrically contacted on the front side by at least one anode contact strip, wherein the sheet resistance length identifies a lateral spacing projected in a layout plane between the cathode contact strip and the anode contact strip, wherein the sheet resistance width identifies a lateral length projected in the layout plane within which the anode layer and the cathode layer are contacted by the anode contact strip or the cathode contact strip, respectively, with a lateral separation that corresponds to the sheet resistance length, and wherein the sheet resistance length is smaller than the sheet resistance width.
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Accused Products
Abstract
A power dissipation-optimized high-frequency coupling capacitor is provided for a rectifier circuit as well as a power dissipation-optimized high-frequency rectifier circuit. The elements of the rectifier stages of the inventive high-frequency rectifier circuit are disposed in an optimized manner regarding space such that the coupling capacitors are connected directly to the contact area for the antenna terminal and are arranged around the contact area while taking into account the connecting wires.
24 Citations
26 Claims
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1. An integrated lateral high-frequency coupling capacitor for a rectifier circuit having a substrate and at least one capacitance finger in the form of a strip arranged on a front side of the substrate, the coupling capacitor comprising:
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at least one electrically conductive cathode layer that is contacted at a front side through at least one cathode contact strip and has a parasitic series resistance resulting from a ratio of a sheet resistance length to a sheet resistance width within the cathode layer; and
at least one electrically conductive anode layer that is insulated from the cathode layer by a dielectric and that is electrically contacted on the front side by at least one anode contact strip, wherein the sheet resistance length identifies a lateral spacing projected in a layout plane between the cathode contact strip and the anode contact strip, wherein the sheet resistance width identifies a lateral length projected in the layout plane within which the anode layer and the cathode layer are contacted by the anode contact strip or the cathode contact strip, respectively, with a lateral separation that corresponds to the sheet resistance length, and wherein the sheet resistance length is smaller than the sheet resistance width. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 24, 25, 26)
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14. A multi-stage power dissipation-optimized high-frequency rectifier circuit for use in a transponder, comprising:
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an input for coupling in a high-frequency AC signal having at least one contact area for an antenna connection;
an output for receiving a rectified output signal; and
multiple rectifier stages arranged in parallel to one another between the input and the output, each of the rectifier stages comprising;
a series circuit of a coupling capacitance for high-frequency applications;
a rectifier diode arranged in a forward direction; and
a load capacitance for low-frequency applications, wherein the coupling capacitances are arranged parallel to one another in a projection of the layout plane and are each connected directly to a contact area for the antenna connection and are arranged around the contact area. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification