ANTENNA DRIVING APPARATUS
First Claim
1. An antenna driving apparatus comprising:
- a direct current power source configured to supply direct current power to a human detecting IC configured to detect contact to a human detecting area of a vehicle by a user of the vehicle, the direct current power source outputting a direct current power source voltage to a first connecting line electrically connected to a power source terminal of the human detecting IC and outputting a reference potential to a second connecting line electrically connected to a GND terminal of the human detecting IC;
an antenna driving circuit configured to drive an antenna that transmits a signal to a portable device carried by the user, the antenna driving circuit outputting a first antenna drive signal generated by switching between the direct current power source voltage and the reference potential to the first connecting line electrically connected to one end of the antenna and outputting a potential difference between the first antenna drive signal and a second antenna drive signal to be output to the second connecting line electrically connected to the other end of the antenna to the antenna as an antenna drive signal; and
a control unit configured to perform switching control of the direct current power source voltage and the antenna drive signal to be output to the first connecting line and the second connecting line and to perform switching control of the antenna driving circuit.
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Accused Products
Abstract
An antenna driving apparatus includes: a direct current power source supplying direct current power to a human detecting IC detecting contact to a human detecting area by a user, the power source outputting a power source voltage to a first connecting line connected to a power source terminal of the IC and outputting a reference potential to a second connecting line connected to a GND terminal of the IC; an antenna driving circuit driving an antenna transmitting a signal to a portable device, the antenna driving circuit outputting a first antenna drive signal to the first connecting line and outputting an antenna drive signal; and a control unit performing switching control of the power source voltage and the antenna drive signal to be output to the first and second connecting lines and switching control of the antenna driving circuit.
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Citations
10 Claims
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1. An antenna driving apparatus comprising:
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a direct current power source configured to supply direct current power to a human detecting IC configured to detect contact to a human detecting area of a vehicle by a user of the vehicle, the direct current power source outputting a direct current power source voltage to a first connecting line electrically connected to a power source terminal of the human detecting IC and outputting a reference potential to a second connecting line electrically connected to a GND terminal of the human detecting IC; an antenna driving circuit configured to drive an antenna that transmits a signal to a portable device carried by the user, the antenna driving circuit outputting a first antenna drive signal generated by switching between the direct current power source voltage and the reference potential to the first connecting line electrically connected to one end of the antenna and outputting a potential difference between the first antenna drive signal and a second antenna drive signal to be output to the second connecting line electrically connected to the other end of the antenna to the antenna as an antenna drive signal; and a control unit configured to perform switching control of the direct current power source voltage and the antenna drive signal to be output to the first connecting line and the second connecting line and to perform switching control of the antenna driving circuit. - View Dependent Claims (2, 3, 7, 9)
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4. An antenna driving apparatus comprising:
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a direct current power source configured to supply direct current power to a human detecting IC configured to detect contact to a human detecting area of a vehicle by a user of the vehicle, the direct current power source outputting a direct current power source voltage to a first connecting line electrically connected to a power source terminal of the human detecting IC and outputting a reference potential to a second connecting line electrically connected to a GND terminal of the human detecting IC; an antenna driving circuit configured to drive an antenna that transmits a signal to a portable device carried by the user, the antenna driving circuit outputting an antenna drive signal to the first connecting line electrically connected to one end of the antenna and the second connecting line electrically connected to the other end of the antenna; a protective diode connected between the direct current power source and the antenna driving circuit and configured to prevent a current caused by the direct current power source voltage from flowing reversely toward the direct current power source via the antenna driving circuit; and a control unit configured to perform switching control of the direct current power source voltage and the antenna drive signal to be output to the first connecting line and the second connecting line and perform switching control of the antenna driving circuit. - View Dependent Claims (5, 6, 8, 10)
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Specification