摘要:
A communication system is provided comprising a living body-side electrode which primarily capacitively couples with a living body, an environment-side electrode which primarily capacitively couples with an external environment, and a circuit board on which a circuit which processes a signal which is output from at least one of the living body-side electrode and the environment-side electrode is mounted, wherein the circuit board is not placed between the living body-side electrode and the environment-side electrode.
摘要:
A communication system is provided comprising an environment-side electrode and a living body-side electrode sandwiching an insulating layer and electrically insulated from each other, a grounding electrode which is electrically connected to the environment-side electrode, and a reception amplifier which amplifies a potential difference between the environment-side electrode and the living body-side electrode, wherein the grounding electrode has a side surface section which extends along a vertical direction.
摘要:
According to a preferred embodiment of the present invention, a low-voltage operation constant-voltage circuit includes a band-gap reference voltage circuit including a resistor-diode series circuit as a main component. A resistor and a diode-connected bipolar transistor are connected in series to create a constant current. It also includes an output circuit connected in parallel to the resistor-diode series circuit and formed so that the same constant current as the current flowing through the resistor-diode series circuit flows. The output circuit includes a diode-connected MOS transistor, and is configured to cancel the positive temperature coefficient of the current flowing through the output circuit by the MOS transistor. With this, a stable output low-voltage of, e.g., about 0.6 V, excellent in temperature characteristics can be obtained regardless of the ambient temperature changes.
摘要:
An amplitude setting circuit for setting an amplitude level of its output signal corresponding to an input signal. By setting a current flowing through a first diode-connected transistor (Q5) and a current flowing through a first drive transistor (Q1) to be in a predetermined relationship, variation with temperature in potential at a first connection point of the first drive transistor (Q1) and a first conductivity-type transistor (M1) is removed, and by setting a current flowing through a second diode-connected transistor (Q6) and a current flowing through a second drive transistor (Q4) to be in a predetermined relationship, variation with temperature in potential at a second connection point of a second conductivity-type transistor (M2) and the second drive transistor (Q4) is removed.
摘要:
An amplitude setting circuit for setting an amplitude level of its output signal corresponding to an input signal. By setting a current flowing through a first diode-connected transistor (Q5) and a current flowing through a first drive transistor (Q1) to be in a predetermined relationship, variation with temperature in potential at a first connection point of the first drive transistor (Q1) and a first conductivity-type transistor (M1) is removed, and by setting a current flowing through a second diode-connected transistor (Q6) and a current flowing through a second drive transistor (Q4) to be in a predetermined relationship, variation with temperature in potential at a second connection point of a second conductivity-type transistor (M2) and the second drive transistor (Q4) is removed.
摘要:
A sinusoidal signal generating circuit for ensuring a small phase difference with respect to a reference signal is provided. The sinusoidal signal generating circuit comprises a capacitor for charging/discharging, a charging unit for charging a predetermined current to the capacitor, and a discharging unit for discharging a current therefrom, whereby an output signal is produced by the change in the potential of the capacitor, wherein the charging unit comprises a charging current adjusting unit for adjusting the magnitude of the charging current, and the discharging unit comprises a discharging current adjusting unit for adjusting the magnitude of the discharging current, and a control signal generating means is provided for supplying a plurality of control signals to the charging current adjusting unit and the discharging current adjusting unit in such a manner that the potential of the capacitor is changed into a sinusoidal waveform. The sinusoidal signal generating circuit can be employed as a dividing means and a driving means in an apparatus for driving a vibrating element.
摘要:
The accuracy of a measurement value obtained by a tire pressure detection device is lowered by a centrifugal force and an inertial force during travel. A pressure sensor (30) displaces a diaphragm (20) in its vertical direction (32) according to the pressure. The pressure sensor (30) is arranged in a tire (2) with the vertical direction (32) directed to a direction parallel to a rotation axis (34) instead of the tire circumferential direction or radial direction. The pressure sensor (30) is mounted onto a substrate with the vertical direction (32) of its diaphragm (20) directed in parallel to the substrate surface and the substrate is bonded to a tread portion of the tire (2) and a wheel rim portion while adjusting the vertical direction (32) of the diaphragm (20) with the direction of the rotation axis (34).
摘要:
In a delay circuit, when a first conductivity-type transistor (M6) becomes conductive on the basis of one level of its input signal, a first current path is formed through a source side transistor (M4), the first conductivity-type transistor (M6), and a second drive transistor (M9) between a source power line and a sink power line, and its output signal being the delayed inverse of the one level of the input signal is output from a connection point of another source side transistor (M5) and a sink side transistor (M11), and when a second conductivity-type transistor (M7) becomes conductive on the basis of the other level of the input signal, a second current path is formed through a first drive transistor (M3), the second conductivity-type transistor (M7), and another sink side transistor (M10), and the output signal being the delayed inverse of the other level of the input signal is output from the connection point.
摘要:
An amplitude adjusting circuit comprises a first current mirror where a variable current of a variable current source is copied into each of 1st-3rd transistors; a second current mirror where the variable current is copied into each of 11th-13th transistors; a third current mirror having 6th-7th transistors where a current through the 2nd transistor copied from the variable current flows through the 6th transistor; a fourth current mirror having 8th-9th transistors where a current through the 12th transistor copied from the variable current flows through the 8th transistor; an inverter that has 1st-2nd conductivity type transistors and produces an output signal corresponding to a current level of the 7th or 9th transistor; a fifth current mirror having 15th-14th transistors where a current through the 14th transistor copied from the 15th transistor's becomes a current sourced by the 7th transistor; and a sixth current mirror having 5th-4th transistors where a current through the 4th transistor copied from the 5th transistor's becomes a current sunk by the 9th transistor.
摘要:
A clock extracting circuit for receiving an encoded signal and for extracting a clock signal from the encoded signal. The circuit comprises an edge detector that detects rising and falling edges of the encoded signal and produces edge detection pulses indicating the edges being detected; a mask signal generator producing a mask signal which is inverted in response to the edge detection pulses, which are produced one for each period of the received encoded signal, on the basis of the edge detection pulses; a mask signal delay section delaying the mask signal by a delay time controllable and outputting the delayed mask signal; a clock generator producing the clock signal on the basis of edges of the delayed mask signal; and a delay controller that controls the delay time of the mask signal delay section so as to set a duty ratio of the produced clock signal to a predetermined value.