摘要:
Disclosed is a printed circuit board, which includes an electromagnetic bandgap structure disposed around an antenna so as to prevent noise from being transmitted to the antenna. The printed circuit board includes an antenna, a circuit chip, a plurality of metal layers and a plurality of dielectric layers, a pair of transmission lines for transmitting a signal to the antenna, and an electromagnetic bandgap structure disposed between the antenna and the circuit chip and for preventing an electromagnetic wave from being transmitted from the circuit chip to the antenna.
摘要:
The present invention relates to a device for generating a signal and method for controlling operation of the same. The present invention provides a device for generating a signal, which includes an electrode, if connected to an external power source, supplied with a voltage from the external power source, a signal generating unit having a plurality of terminals, the signal generating unit deciding whether to operate the device according to a size of a voltage applied to a first terminal among a plurality of the terminals, the signal generating unit outputting a prescribed signal according to the decision, and a control circuit, if the electrode is connected to a plurality of the terminals, controlling a voltage applied to a plurality of the terminals. Accordingly, the present invention is able to control whether to operate a signal generating device using an external power source.
摘要:
Disclosed herein are an electromagnetic bandgap structure and a printed circuit board having the same. The bandgap structure includes a conductive layer including a plurality of conductive plates, a first metal layer disposed under the conductive layer and including a first stitching pattern electrically connected to a first conductive plate of the plurality of conductive plates, and a second metal layer disposed under the first metal layer and including a second stitching pattern electrically connected to both the first stitching pattern and a second conductive plate of the plurality of conductive plates. The bandgap to structure includes stitching patterns formed in two layers different from the conductive layer, thus offering a stop-band having a desired bandwidth in a compact structure.
摘要:
A portable device for data communication using a body as a conductor to transmit data to a receiver, the portable device includes a data receiving unit to receive data, a controller unit to control processing of data to be transmitted, a current limiting circuit to limit a current of a signal corresponding to the data to be transmitted to a predetermined value, and transmitting electrodes connected to the current limiting circuit and to contact the body to transmit the signal having the current of predetermined value to the receiver.
摘要:
An electro-magnetic bandgap structure is disclosed. The electro-magnetic bandgap structure in accordance with an embodiment of the present invention includes a plurality of conductive plates bridge-connected with one another on a same plane, whereas the each of the conductive plates includes an internal patch; a first ring patch be electrically separated from the internal patch and surrounding the internal patch; and a second ring patch surrounding the first ring patch and electrically connected with the first ring patch through a portion.
摘要:
A portable device for data communication using a body as a conductor to transmit data to a receiver, the portable device includes a data receiving unit to receive data, a controller unit to control processing of data to be transmitted, a current limiting circuit to limit a current of a signal corresponding to the data to be transmitted to a predetermined value, and transmitting electrodes connected to the current limiting circuit and to contact the body to transmit the signal having the current of predetermined value to the receiver.
摘要:
Disclosed herein are an electromagnetic bandgap structure and a printed circuit board having the same. The bandgap structure includes a conductive layer including a plurality of conductive plates; and a metal layer disposed over or under the conductive layer and including a stitching pattern to electrically connect a first conductive plate to a second conductive plate of the plurality of conductive plates. The bandgap structure includes a spiral stitching pattern formed in a metal layer different from the conductive layer, thus offering a stop-band having a desired bandwidth in a compact structure.
摘要:
The present invention provides method and system for data communication in the human body and a sensor therefor. The method and system transmit information through the human body to a receiver located outside the human body using low current and voltage polarity, so that they cause no damage to the human body and achieve low power consumption and better receiving sensitivity. In addition, the sensor contains a CMOS image sensor on which all circuits are integrated without radio transmitter and antenna, so that it achieves a low-priced and small-sized capsule type endoscope.
摘要:
A portable device for data communication using a body as a conductor to transmit data to a receiver, the portable device includes a data receiving unit to receive data, a controller unit to control processing of data to be transmitted, a current limiting circuit to limit a current of a signal corresponding to the data to be transmitted to a predetermined value, and transmitting electrodes connected to the current limiting circuit and to contact the body to transmit the signal having the current of predetermined value to the receiver.
摘要:
An electro-magnetic bandgap structure is disclosed. The electro-magnetic bandgap structure in accordance with an embodiment of the present invention includes a plurality of conductive plates bridge-connected with one another on a same plane, whereas the each of the conductive plates includes an internal patch; a first ring patch be electrically separated from the internal patch and surrounding the internal patch; and a second ring patch surrounding the first ring patch and electrically connected with the first ring patch through a portion.