In an integrated circuit implemented on a circuit board, output lines of an output circuit that outputs a logic signal are connected to the circuit board by soldering of a leadless terminal that cannot be seen as being implemented. A fault diagnosing unit tests an output voltage of the leadless terminal with respect to the circuit board as being implemented to determine whether the output voltage is a normal voltage or an abnormal voltage. The fault diagnosing unit includes a pseudo-output unit ...

In a two-stage inverter circuit including an inverter circuit constituted by first and second FETs and an inverter circuit constituted by two FETs, a source and a gate of a third FET are connected to a first power source and a second power source, respectively. A drain of the third FET is connected to a source of the first FET. A source and a gate of a fourth FET are connected to the first power source and the second power source, respectively. A drain of the fourth FET is connected to a source ...

A latch circuit for temporarily storing an input signal and successively outputting the input signal is disclosed, that comprises an input transfer circuit for inputting a reference clock signal, a first inverter for inverting an output signal of the input transfer circuit, a second inverter for inverting an output signal of the first inverter, and a hold transfer circuit for inputting an output signal of the second inverter and outputting it to the first inverter, wherein a second clock signal ...

A test circuit for testing an integrated circuit, includes a test signal input for receiving a test signal from the integrated circuit and a reference signal input for receiving a reference signal. A comparator is in communication with the test signal input and with the reference signal input. The comparator is configured to provide, at a comparator output, an error signal if a comparison between the reference signal and the test signal indicates an error. The error signal, if present, is stored...

A circuit breaker for a dual-circuit includes a body with two chambers. Two pairs of terminals are respectively provided in the two chambers and extend out from the body. The first terminal has a first immovable node, and the second terminal has a bimetallic strip and a first movable node on the bimetallic strip and electrically connected with the first immovable node. The third terminal has a second immovable node, and the fourth terminal has a metal strip and a second movable node on the metal...

To drive a single-mode laser device using a differential-pair output stage, collector terminals of transistors forming the differential-pair must be maintained at a predetermined potential. Since the potential dropped across the laser device is only about 1V, a Schottky diode connected between a cathode of the laser device and a second supply rail raises the cathode about 0.5V above the voltage of the second supply rail.

A circuit breaker test device for testing a circuit breaker, and also for testing the branch circuit of which the circuit breaker is a part. The circuit breaker test device includes a switch that controllably short-circuits the branch circuit. A controller causes the switch to short circuit the branch circuit. A timer, responsive to operation of the controller, causes the switch to cease short-circuiting the branch circuit after a particular test time. An impedance value of the branch circuit is...

A monitor circuit for indicating the change of state of one of a plurality of signalizing switching elements, each switching element controlling according to its state the state of an electronic switch, said electronic switches controlling indicating means.

Several forms of multiplexing circuit are disclosed in which any selected one of a number of process responsive signal transmitters can be connected to a common measuring impedance by means of electronic switching devices individually associated with said transmitters. All transmitters are maintained energized at all times, whether or not they are addressed, to permit higher sampling speed.

A control for supplying not more than one complete cycle of an alternating current upon command. The circuit has a plurality of gate controlled switching devices and a command switch. An energy storage device has one of the switching devices connected in the circuit for conducting a short time after the beginning of each current excursion of a specific polarity, and another of the switching devices is connected in series between a power source and a load for supplying energy to the load when gat...