An embodiment of the present disclosure relates to an electronic circuit including a first switch coupling a first node of the circuit to an input/output terminal of the circuit; a second switch coupling the first node to a second node of application of a fixed potential; and a high-pass filter having an input coupled to the terminal and an output coupled to a control terminal of the second switch.

An embodiment of the present disclosure relates to an electronic circuit including a first switch coupling a first node of the circuit to an input/output terminal of the circuit; a second switch coupling the first node to a second node of application of a fixed potential; and a highpass filter having an input coupled to the terminal and an output coupled to a control terminal of the second switch.

In a switching circuit, an inductance of an inductor of a shunt circuit is such that off capacitance of a second switching device that is in the off state when a first switching device is in the on state is used to define, in the shunt circuit, a series resonance circuit with a desired resonant frequency. Therefore, the frequency of an unnecessary signal to be attenuated is set to the resonant frequency of the series resonance circuit. Thus, the switching circuit achieves improved isolation characteristics with other circuits by attenuating the unnecessary signal.

In a switching circuit, an inductance of an inductor of a shunt circuit is such that off capacitance of a second switching device that is in the off state when a first switching device is in the on state is used to define, in the shunt circuit, a series resonance circuit with a desired resonant frequency. Therefore, the frequency of an unnecessary signal to be attenuated is set to the resonant frequency of the series resonance circuit. Thus, the switching circuit achieves improved isolation characteristics with other circuits by attenuating the unnecessary signal.

Examples disclosed herein relate to a switchable reflective phase shifter for millimeter wave applications. The switchable reflective phase shifter has a switchable phase shift network with a plurality of switches to activate a plurality of phase subranges in response to a plurality of bias voltages provided by a control module, and a reflective phase shifter to generate phase shifts in a given phase subrange activated by a given switch in the plurality of switches.

A chip includes a level control circuit, an output circuit, a level supply circuit, and an output terminal. The level control circuit is configured to output a response signal in response to an operation mode of the chip. The output circuit has an output side, and the output side couples to the output terminal. When the operation mode of the chip is a working mode, the response signal is at a first level, and the output circuit is configured to output an output signal at the output terminal. When the operation mode of the chip is a power saving mode, the response signal is at a second level, the output side of the output circuit is in a floating state, and the level supply circuit is configured to provide a level voltage to the output terminal according to the response signal, so that the output terminal has a fixed level.

An embodiment of the present disclosure relates to an electronic circuit including a first switch coupling a first node of the circuit to an input/output terminal of the circuit; a second switch coupling the first node to a second node of application of a fixed potential; and a high-pass filter having an input coupled to the terminal and an output coupled to a control terminal of the second switch.

Provided is a drive control device including: a first output node coupled to a gate node of a high-side transistor; a second output node coupled to a drive node; a first transistor provided between a first power supply node and the first output node; and a current limiting circuit and a second transistor provided in series between the first output node and the second output node, in which the current limiting circuit limits a current from the drive node toward the first output node to a predetermined value. The current limiting circuit is, for example, a transistor having a direction opposite to that of the second transistor.

A power supply device includes a power output terminal, a power converter and an electronic circuit breaker. In view of operation of the electronic circuit breaker, when an electric appliance that acts as a load is connected between the power output terminal and a ground terminal, the electronic circuit breaker is activated to output voltage from the power converter to the power output terminal so as to charge the electric appliance. When the electric appliance is done with charging and is removed, the electronic circuit breaker is deactivated to prevent voltage of the power converter from being outputted to the power output terminal. Thus, even if the power output terminal is exposed, the power output terminal won't output power to result in electric shock because of users' inadvertent contact when no electric appliance is being charged, thereby enhancing operational safety.

A high frequency switch (1) includes a first input/output terminal (30); at least three second input/output terminals (40a to 40e); a first switch (10) including a first common terminal (11) and at least two first selection terminals (12a to 12c) selectively connected to the first common terminal (11); and a second switch (20) including a second common terminal (21) connected to the first selection terminal (12c) with a matching circuit (50) interposed therebetween and at least two second selection terminals (22a to 22c) selectively connected to the second common terminal (21), in which the first common terminal (11) is connected to the first input/output terminal (30), the first selection terminals (12a and 12b) are connected to the second input/output terminals (40a and 40b), and the second selection terminals (22a to 22c) are connected to the second input/output terminals (40c to 40e).