ELECTRONIC CIRCUIT
First Claim
1. An electronic circuit comprising:
- a first substrate comprising a first coil and a transmitting circuit, the transmitting circuit making a pulse current in a first direction flow through the first coil at each change of logical values of transmit data with a prearranged logical value in the head; and
a second substrate comprising a second coil coupled inductively to the first coil and a receiving circuit connected to the second coil,wherein the receiving circuit comprises;
a comparator outputting a single pulse signal with a single polarity, by determining, with the use of a threshold voltage, an induced voltage with a double pulse shape induced in the second coil by the pulse current in the first direction; and
a sequential circuit inverting the own output whenever the single pulse signal is inputted.
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Accused Products
Abstract
A low-power high-speed asynchronous inductive-coupling transmission and reception technology is provided, in which a current signal of a single pulse is made to flow through a transmitting coil, and a voltage signal of a double pulse induced in an inductively-coupled receiving coil can be received asynchronously. A transmitting circuit for performing non-contact proximity communication adopts a configuration in which current flows through a first coil in a first direction for each change of a logical value of transmit data. A receiving circuit connected to a second coil coupled inductively to the first coil employs a comparator which determines an induced voltage of a double pulse induced in the second coil by current in the first direction and outputs a unipolar single pulse signal. Whenever the single pulse signal outputted by the comparator is inputted, the receiving circuit inverts the output in a sequential circuit and reproduces receive data.
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Citations
7 Claims
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1. An electronic circuit comprising:
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a first substrate comprising a first coil and a transmitting circuit, the transmitting circuit making a pulse current in a first direction flow through the first coil at each change of logical values of transmit data with a prearranged logical value in the head; and a second substrate comprising a second coil coupled inductively to the first coil and a receiving circuit connected to the second coil, wherein the receiving circuit comprises; a comparator outputting a single pulse signal with a single polarity, by determining, with the use of a threshold voltage, an induced voltage with a double pulse shape induced in the second coil by the pulse current in the first direction; and a sequential circuit inverting the own output whenever the single pulse signal is inputted. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification