Circuit, transmission system and method for determining proximity of an object
First Claim
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1. A circuit, comprising:
- a sensing circuit for a first antenna and a second antenna which concurrently participate in a communication, wherein the sensing circuit comprises an adjustable characteristic that is based on a proximity of an object to the first or second antenna used for transmission of a transmit signal, and wherein the sensing circuit comprises the first antenna or the second antenna;
an evaluation circuit coupled to the sensing circuit, the evaluation circuit being configured to monitor the characteristic of the sensing circuit and to determine whether the characteristic fulfills at least one of a predetermined set of criteria; and
a switching element configured to operatively couple the evaluation circuit to the first antenna during a first time interval and to operatively couple the evaluation circuit to the second antenna during a second time interval.
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Abstract
A circuit includes a sensing circuit for a first antenna and a second antenna, the sensing circuit including an adjustable characteristic that is based on a proximity of an object to the first or second antenna used to transmit a transmit signal. An evaluation circuit is coupled to the sensing circuit. The evaluation circuit is configured to monitor the characteristic of the sensing circuit and to determine whether the characteristic fulfills a predetermined criterion.
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Citations
16 Claims
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1. A circuit, comprising:
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a sensing circuit for a first antenna and a second antenna which concurrently participate in a communication, wherein the sensing circuit comprises an adjustable characteristic that is based on a proximity of an object to the first or second antenna used for transmission of a transmit signal, and wherein the sensing circuit comprises the first antenna or the second antenna; an evaluation circuit coupled to the sensing circuit, the evaluation circuit being configured to monitor the characteristic of the sensing circuit and to determine whether the characteristic fulfills at least one of a predetermined set of criteria; and a switching element configured to operatively couple the evaluation circuit to the first antenna during a first time interval and to operatively couple the evaluation circuit to the second antenna during a second time interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A circuit, comprising:
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a sensing circuit for a first antenna and a second antenna, wherein the sensing circuit comprises an adjustable characteristic that is based on a proximity of an object to the first or second antenna used to transmit a transmit signal; and an evaluation circuit coupled to the sensing circuit, the evaluation circuit being configured to monitor the characteristic of the sensing circuit and to determine whether the characteristic fulfills a predetermined criterion, wherein the sensing circuit comprises a sensing electrode coupled to the evaluation circuit, the sensing electrode being arranged between the first antenna and the second antenna. - View Dependent Claims (12)
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13. A circuit, comprising:
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a sensing circuit configured to couple to a first antenna and a second antenna, wherein the sensing circuit comprises an adjustable characteristic that is based on a proximity of an object to the first or second antenna used to transmit a transmit signal when coupled thereto; and an evaluation circuit coupled to the sensing circuit, wherein the evaluation circuit monitors the adjustable characteristic of the sensing circuit and determine whether the adjustable characteristic fulfills a predetermined criterion; wherein the evaluation circuit determines whether the first antenna or the second antenna is to be used to transmit the transmit signal based on a previous state of an antenna configuration and a current state of the antenna configuration; wherein the antenna configuration comprises the first antenna connected selectively to one of a transceiver and a receiver, and the second antenna connected selectively to the other one of the transceiver and the receiver. - View Dependent Claims (14, 15, 16)
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Specification