ELECTRONIC CIRCUIT AND METHOD FOR DETERMINING AN IMPEDANCE
First Claim
1. An electronic circuit in an external programming device and configured for contactless programming of a circuit to be programmed, the electronic circuit comprising:
- a series resonant circuit including a transmitter coil and a capacitor connected in series;
said transmitter coil of the series resonant circuit being disposed for inductive coupling to a receiver coil of the circuit to be programmed; and
a device connected to said series resonant circuit and configured for determining, from a phase difference between a control voltage of said series resonant circuit and a capacitor voltage of said series resonant circuit, an actual impedance existing in the circuit to be programmed.
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Accused Products
Abstract
An electronic circuit is arranged in an external programming device and is used for contactless programming of a circuit to be programmed. The electronic circuit has a series resonant circuit that includes a transmitter coil and a capacitor. The transmitter coil of the series resonant circuit is used for inductive coupling to a receiver coil in the circuit to be programmed. For the purpose of evaluating the impedance that actually exists in the circuit to be programmed, there is provided a device for determining the value of the impedance from a phase difference between the control voltage of the series resonant circuit and the capacitor voltage of the series resonant circuit.
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Citations
20 Claims
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1. An electronic circuit in an external programming device and configured for contactless programming of a circuit to be programmed, the electronic circuit comprising:
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a series resonant circuit including a transmitter coil and a capacitor connected in series; said transmitter coil of the series resonant circuit being disposed for inductive coupling to a receiver coil of the circuit to be programmed; and a device connected to said series resonant circuit and configured for determining, from a phase difference between a control voltage of said series resonant circuit and a capacitor voltage of said series resonant circuit, an actual impedance existing in the circuit to be programmed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of determining an impedance that actually exists in a programmable circuit, wherein the programmable circuit includes a receiver coil for contactless coupling with an electronic circuit containing a series resonant circuit and wherein the series resonant circuit includes a transmitter coil and a capacitor, the method which comprises:
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inductively coupling the transmitter coil of the series resonant circuit to the receiver coil of the programmable circuit; measuring a phase difference between a control voltage of the series resonant circuit and a capacitor voltage of the series resonant circuit; and determining from the phase difference the impedance that actually exists in the programmable circuit. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification