Antenna port termination in absence of power supply
AssigneepSemi Corporation
InventorSivakumar Ganesan
Life of this patent
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Abstract
Methods and devices to address antenna termination in absence of power supplies within an electronic circuit including a termination circuit and a switching circuit. The devices include regular NMOS devices that decouple the antenna from the switching circuit in absence of power supplies while the antenna is coupled to a terminating impedance having a desired impedance value through a native NMOS device. The antenna is coupled with the switching circuit via the regular NMOS device during powered conditions while the antenna is decoupled from the terminating impedance.
Claims20
An electronic circuit comprising:
- an antenna coupled with a termination circuit and an output node;
- the termination circuit including a termination impedance and a first switch, the first switch comprising one or more transistors;
- a control circuit configured to control the first switch to selectively connect the antenna to the termination impedance in an unpowered condition and to decouple the antenna from the termination impedance in a powered condition.
A method for controlling termination of an antenna in an electronic circuit, comprising:
- selectively coupling or decoupling the antenna to/from an output node;
- providing a termination circuit with a termination impedance and a first switch;
- providing a control circuit to control the first switch;
- in a powered condition, maintaining the first switch in an OFF state, thereby decoupling the antenna from the termination impedance;
- in an unpowered condition, switching the first switch to an ON state, thereby terminating the antenna with the termination impedance.
Dependencies are inferred from the claim text.