Rohm Co., Ltd.

Satoru Kominami

Tomoki Yamamoto

Hideki Matsubara

A switch state detection circuit according to the present invention comprises: a plurality of switch connection portions to each of which a switch is connected, a connection line to which any one of the switch connection portions is connected in a switchable manner, a detection portion that detects a state of the switch connected to the connection line based on a state of the connection line, and a connection control portion that switches successively each of the switch connection portions and connects it to the connection line, wherein the state of each switch is detected.

Switch state detection circuit and switch system

A circuit control device for controlling power consumption of a plurality of circuit units includes a monitoring unit configured to monitor whether a detection temperature of each of the circuit units meets a predetermined overheat condition, and an overheat protection unit configured to execute an overheat protection operation when the overheat condition is met in any one of the circuit units, wherein the overheat protection operation is an operation to reduce power consumption of an overheat unit meeting the overheat condition, among the circuit units, and a neighbor unit disposed near the overheat unit.

Circuit control device, circuit system, switch state detection circuit and vehicle

In a conventional signal transmission device that transmits signals fed thereto to another device through a transformer, when the direction of the current flowing through the primary coil of the transformer is switched by switching devices connected in series between two different potentials, the timing with which the switching device that has been receiving current up to the moment is turned off is delayed from the timing with which the other switching devices are turned on or off to reduce overshoots and undershoots. This, however, may distort the square wave appearing across the secondary coil and make correct signal transmission impossible. To prevent this, a signal transmission device of the invention additionally has a waveform adjustment circuit that controls the delay time produced by a timing adjustment circuit according to changes in the states of control signals.

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Kyoto, Japan

Satoru Kominami