Electronic circuit
First Claim
1. An electronic circuit according to the invention comprising:
- a first substrate including a first receiver coil that is formed by wiring on a substrate and receives signals, and a first receiver circuit into which signals from said first receiver coil are inputted;
a second substrate including a second receiver coil that is formed by wiring on a substrate and receives signals, and a second receiver circuit into which signals from said second receiver coil are inputted; and
a third substrate including a transmitter coil that is formed by wiring on a substrate at a position corresponding to said first receiver coil and said second receiver coil, constructs a communications channel by being inductively coupled with said first receiver coil and said second receiver coil and transmits signals, and a transmitter circuit that outputs signals at the first transmit power in the case of transmitting to said first receiver coil and output signals at the second transmit power different from the first transmit power in the case of transmitting to said second receiver coil.
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0 Petitions
Accused Products
Abstract
The invention provides an electronic circuit capable of carrying out communications by inductive coupling with minimum power consumption between substrates. In the electronic circuit according to the invention, although the amplification factor of the amplifier 10a is 1, the amplification factors of the amplifiers 10b through 10d are, respectively, 2, 4 and 8. Amplification is carried out at the amplification factors 1 through 15 (=1+2+4+8) as a whole by a combination thereof. The transmit power control register 21 outputs ON and OFF signals to the respective amplifiers 10a through 10d so as to bring about transmit power responsive to the distance to a substrate having a receiver coil which is a destination of transmission (that is, the distance between a transmitter coil and a receiver coil), in further detail, so as to have an amplification factor by which transmit power proportionate to the distance can be obtained, and selects a combination of the amplifiers 10a through 10d.
27 Citations
3 Claims
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1. An electronic circuit according to the invention comprising:
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a first substrate including a first receiver coil that is formed by wiring on a substrate and receives signals, and a first receiver circuit into which signals from said first receiver coil are inputted;
a second substrate including a second receiver coil that is formed by wiring on a substrate and receives signals, and a second receiver circuit into which signals from said second receiver coil are inputted; and
a third substrate including a transmitter coil that is formed by wiring on a substrate at a position corresponding to said first receiver coil and said second receiver coil, constructs a communications channel by being inductively coupled with said first receiver coil and said second receiver coil and transmits signals, and a transmitter circuit that outputs signals at the first transmit power in the case of transmitting to said first receiver coil and output signals at the second transmit power different from the first transmit power in the case of transmitting to said second receiver coil. - View Dependent Claims (2, 3)
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Specification