Abstract:
There is provided a current measuring apparatus that measures an electric current received by an electronic device from an input terminal, The current measuring apparatus includes a first voltage accumulator that accumulates a reference supply voltage that acts as a reference for a voltage being supplied to the electronic device during measuring electric currents, a first switch that connects a power supply to the first voltage accumulator to accumulate the reference supply voltage before measuring electric currents and disconnects the power supply from the first voltage accumulator during measuring electric currents, a current supplying section that supplies an electric current based on the reference supply voltage accumulated in the first voltage accumulator and a terminal voltage of the input terminal to the electronic device during measuring electric currents, and a first current measuring section that measures the supply current supplied to the electronic device.
Abstract:
A method for generating a carrier residual signal and its device, in which a heterodyne optical signal used in a photometric field or an optical fiber radio communication field can be stably generated with a simplified structure. The device includes an optical modulating unit that includes a light source generating a light wave having a specific wavelength, and an SSB optical modulator. A light wave emitted from the light source enters into the optical modulating unit. A light wave emitted from the optical modulating unit includes a carrier component related to a zero-order Bessel function and a specific signal component related to a specific high-order Bessel function while suppressing signal components other than the specific signal component related to the specific high-order Bessel function, and a ratio of optical intensity between the carrier component and the specific signal component is set substantially to 1.
Abstract:
Provided is a power supply apparatus including: a connection resistance that supplies a power supply current of an electronic device to the electronic device; a low pass filter that allows passage of an output voltage of a power current output section; a parallel load section that consumes a partial power current being a part of the output power current when receiving a power current decrease signal and stops receiving the partial power current when receiving a power current increase signal; an offset adder section that outputs a voltage obtained by adding an offset voltage to the output voltage of the low pass filter; and a difference detection section that supplies the power current increase signal to the parallel load section while a potential of a device side end of the connection resistance is smaller than a reference voltage obtained by subtracting a reference potential difference from the output voltage of the offset adder section, and supplies the power current decrease signal to the parallel load section when the potential of the device side end becomes larger than the reference voltage, where the offset adder section adjusts the offset voltage when the first reference potential difference is changed according to change in the output voltage of the low pass filter.
Abstract:
In a radio optical fusion communication system with the integration of an optical fiber transmission path and a radio propagation path, wherein by first and second light sources, an intermediate-frequency signal generating means for generating a modulating signal at an intermediate frequency band, a modulator for modulating an optical signal from the first light source into an SSB modulated optical signal using the intermediate-frequency signal, and an optical mixer for mixing the modulated optical signal with the optical signal from the second light source to obtain an optical transmission signal in a base station, the frequency of either of the optical signals is controlled such that the difference in frequency between the optical signals is a desired frequency of a modulated radio signal, thus switching the frequency channel of the modulated radio signal in the radio propagation path.
Abstract:
A particle monitoring device includes a light source for emitting a measurement light; and a light projecting/receiving unit, connected to a depressurized vessel of a processing apparatus, for projecting the emitted measurement light into the depressurized vessel and receiving a scattered light from a particle floating in the depressurized vessel. The light projecting/receiving unit is disposed such that the scattered light is received substantially parallel to the measurement light. The particle monitoring device further includes a received light intensity detection unit. The received light intensity detection unit has a received light intensity detection unit for determining whether or not the detected intensity is greater than a predetermined value and an instruction unit for instructing the processing apparatus to start, continue or stop a processing operation of the processing apparatus depending on the determined result.
Abstract:
An optical component comprises an optical transmission element (e.g., an optical lens) whose circumferential wall partially joins a metal holder via a joining material (e.g., a low melting point glass), wherein stress is normally applied to the optical transmission element in a compression direction when joining the metal holder. The optical transmission element is inserted into a through hole of the metal holder, and the joining material is kept in a bank actualized by a tapered portion formed in proximity to one end of the through hole of the metal holder. This prevents tensile stress from being applied to the optical transmission element; thus, it is possible to avoid the occurrence of cracks and separations in the optical transmission element; and it is possible to avoid the occurrence of errors in optical characteristics, regardless of variations of the environmental temperature, so that, the optical component is improved in reliability.
Abstract:
A testing apparatus for testing an electron device, has a first supply unit that supplies a first current to the electron device; a first feedback circuit which feeds back voltage applied to the electron device to the, first supply unit; a first switch which switches to whether or not connect electrically the electron device to the first feedback circuit; a second supply unit that supplies a second current to the electron device, the second supply unit being separated from the electron device by the first switch.
Abstract:
In an IC testing apparatus which executes a function test and a DC test, a resistor having a high resistance is connected to the output side of a DC tester such that the connection of the resistor allows a function test to operate normally if the DC tester is left connected to the function tester, thus allowing the DC test to be interrupted into the execution of the function test to enable a concurrent execution of the function test and the DC test. As a result, the time required to change switches in the DC tester, for example, can be executed during the function test, thus preventing the time interval required to change the switches from increasing the time interval required for the test, thereby reducing the testing time interval.
Abstract:
An imidazopyridine derivative of the formula �I!: ##STR1## wherein R.sup.1 is a lower alkyl group, R.sup.2 is a lower alkanoyl group, and R.sup.3 and R.sup.4 are each lower alkyl groups, or both combine at the end thereof to form an alkylene group having 3 to 6 carbon atoms, and a pharmaceutically acceptable salt thereof, said imidazopyridine derivatives have an excellent angiotensin II antagonistic activity and are useful for the prophylaxis or treatment of hypertension.
Abstract:
To give an electric shield function and an electric contact function to a light shielding film formed on a drive substrate. An active matrix display device includes a drive substrate 1 having pixels 4, an opposed substrate 2 having an opposed electrode 5, and a liquid crystal 3 held in a space defined between the drive substrate 1 and the opposed substrate 2. An upper layer portion of the drive substrate 1 includes pixel electrodes 6 formed individually for the pixels 4. A lower layer portion of the drive substrate 1 includes thin-film transistors 7 for individually driving the pixel electrodes 6, scanning lines 8, and signal lines 9. A light shielding film having conductivity is interposed between the upper layer portion and the lower layer portion, and is divided into mask shielding films 16M and pad shielding films 16P. Each mask shielding film 16M is continuously patterned along each row of the pixels 4 to partially shield at least the corresponding thin-film transistor 7. Each mask shielding film 16M is insulated from both the upper layer portion and the lower layer portion, and is maintained at a fixed potential. The pad shielding films 16P are discretely patterned for the individual pixels 4, and each pad shielding film 16P is located at a contact portion C between the corresponding pixel electrode 6 and the corresponding thin-film transistor 7 to provide electrical connection therebetween and light shielding.