Abstract: A laser diode drive circuit includes: a laser diode; a differential line including a first signal line having a first end connected with an anode terminal of the laser diode and a second signal line having a first end connected with a cathode terminal of the laser diode; first power supply wiring having a first end connected with a positive side terminal of a direct current power supply and a second end connected with the anode terminal; second power supply wiring having a first end connected with a negative side terminal of the direct current power supply and a second end connected with the cathode terminal; a first capacitor inserted in the first signal line; and a second capacitor inserted in the second signal line. In the laser diode drive circuit, at least one of the first capacitor and the second capacitor is a variable capacitor.

Abstract: An electromagnetic field probe includes one continuous conductor line having terminals at both ends of the one continuous conductor line and including 2N (N is an integer greater than or equal to 3) conductors radially extending from a point near the center of the electromagnetic field probe, the one continuous conductor line being not short-circuited in the middle and being formed by connecting an end portion of a conductor included in the 2N conductors to an end portion of another conductor included in the 2N conductors, and two conductors included in the 2N conductors are disposed at positions at which the two conductors face each other with the point near the center present between the two conductors, and end portions of the two conductors close to the point near the center are connected to each other.

Abstract: A plurality of electronic circuit boards (2), on which electronic components are mounted, is inserted in parallel through an electronic circuit insertion port (11) of a casing body (1). A gap (3) is formed between front panels (22) of inserted and adjacent electronic circuit boards (2) inserted. A bridge body (5) constituting conduction means electrically conducts a first conductive side portion (22a) of a front panel (22) in one electronic circuit board (2) of adjacent electronic circuit boards (2) and a second conductive side portion (22b) of a front panel (22) in another electronic circuit board (2) that faces the first conductive side portion (22a) via a gap (3).

Abstract: A noise detection circuit includes a first reference voltage applying circuit to apply a first reference voltage to a first input terminal of a comparator, a second reference voltage applying circuit to apply a second reference voltage to a second input terminal of the comparator, and a feedback circuit having a first end connected with an output terminal of the comparator and a second end connected with the first input terminal or the second input terminal of the comparator.

Abstract: A plurality of electronic circuit boards (2), on which electronic components are mounted, is inserted in parallel through an electronic circuit insertion port (11) of a casing body (1). A gap (3) is formed between front panels (22) of inserted and adjacent electronic circuit boards (2) inserted. A bridge body (5) constituting conduction means electrically conducts a first conductive side portion (22a) of a front panel (22) in one electronic circuit board (2) of adjacent electronic circuit boards (2) and a second conductive side portion (22b) of a front panel (22) in another electronic circuit board (2) that faces the first conductive side portion (22a) via a gap (3).

Abstract: A looped conductor (1) is opened at both ends, one end (1a) is connected to a conductor plate (2), and the other end (1b) is connected to a lead wire (5b). The conductor plate (2) is disposed parallel to a loop surface of the looped conductor (1) and has a shape covering the looped conductor (1). A lead wire (5a) is connected to the conductor plate (2), and outputs from the lead wire (5a) and the lead wire (5b) are specified as a measurement output of an electromagnetic field probe.

Abstract: An electromagnetic field probe includes one continuous conductor line having terminals at both ends of the one continuous conductor line and including 2N (N is an integer greater than or equal to 3) conductors radially extending from a point near the center of the electromagnetic field probe, the one continuous conductor line being not short-circuited in the middle and being formed by connecting an end portion of a conductor included in the 2N conductors to an end portion of another conductor included in the 2N conductors, and two conductors included in the 2N conductors are disposed at positions at which the two conductors face each other with the point near the center present between the two conductors, and end portions of the two conductors close to the point near the center are connected to each other.

Abstract: Two linear conductors are orthogonally arranged to each other without short-circuiting. Both ends of one of the linear conductors are connected to corresponding both ends of another of the linear conductors by connecting conductors to form a continuous loop. A pair of terminals is provided in one divided portion in the loop. Loop antennas each including the linear conductors, the connecting conductors, and the terminals are linearly arranged, and the loop antennas adjacent to each other are arranged to be rotated relative to each other on a plane.

Abstract: A cable coupler including an external cylinder mechanism having an inner conductor for electrically connecting the inner conductor itself to the outer conductors of the shielded cables, an outer conductor having a larger diameter than the inner conductor, a gap portion disposed between the inner conductor and the outer conductor, and capacitors arranged in the gap portion, for electrically connecting between the outer conductor and the inner conductor, an inner portion of the external cylinder mechanism being able to be opened and closed along a longitudinal direction, an internal coupling mechanism placed inside the inner conductor and having connecting pins for holding the core wires of the shielded cables, for electrically connecting between the core wires of the shielded cables, and a base for holding the external cylinder mechanism and for electrically connecting the external cylinder mechanism to an external conductor.

Abstract: A cable coupler including an external cylinder mechanism having an inner conductor for electrically connecting the inner conductor itself to the outer conductors of the shielded cables, an outer conductor having a larger diameter than the inner conductor, a gap portion disposed between the inner conductor and the outer conductor, and capacitors arranged in the gap portion, for electrically connecting between the outer conductor and the inner conductor, an inner potion of the external cylinder mechanism being able to be opened and closed along a longitudinal direction, an internal coupling mechanism placed inside the inner conductor and having connecting pins for holding the core wires of the shielded cables, for electrically connecting between the core wires of the shielded cables, and a base for holding the external cylinder mechanism and for electrically connecting the external cylinder mechanism to an external conductor.

Abstract: An LC filter is provided which includes a first conductive sheet, a first dielectric sheet laminated on the first conductive sheet, a second conductive sheet laminated on the first dielectric sheet, a second dielectric sheet laminated on the second conductive sheet, a third conductive sheet laminated on the second dielectric sheet, and a third dielectric sheet laminated on a third conductive sheet formed as an integral body which has the first, the second and the third conductive sheets and the first, the second and the third dielectric sheets, are coiled. The first and the second conductive sheets are respectively provided with input terminals and output terminals.

Abstract: An LC filter is provided which includes a first conductive sheet, a first dielectric sheet laminated on the first conductive sheet, a second conductive sheet laminated on the first dielectric sheet, a second dielectric sheet laminated on the second conductive sheet, a third conductive sheet laminated on the second dielectric sheet, and a third dielectric sheet laminated on a third conductive sheet formed as an integral body which has the first, the second and the third conductive sheets and the first, the second and the third dielectric sheets, are coiled. The first and the second conductive sheets are respectively provided with input terminals and output terminals.