A method of implementing a radio frequency (RF) switch comprises the steps of forming a first switch device on an integrated circuit substrate, forming a second switch device on the integrated circuit substrate, connecting the first switch device between a first pad and a second pad of the integrated circuit, connecting the second switch device between the second pad and a third pad of the integrated circuit, directly connecting a first control pad of the integrated circuit for receiving a first digital control signal to a control terminal of the first switch device, and directly connecting a second control pad of the integrated circuit for receiving a second digital control signal to a control terminal of the second switch device. A threshold voltage of the first and second switch devices is generally modified to allow being directly driven by the first digital control signal or the second digital control signal.

In a sensor device 1 according to the present invention, power is supplied from a control device 10 to a power supply terminal 7 and a ground terminal 9 of the sensor device 1 via a power supply line Vcc and a ground line Gnd, respectively, and a sensor output voltage is sent from a sensor output terminal 8 to the control device 10 via a sensor output line Vout. The control device 10 has disposed therein a constant voltage source 11 that supplies a constant voltage to the sensor device 1, and a pull-up resistor 12 connected between the sensor output line Vout and the constant voltage source 11. The sensor device 1 comprises: a physical quantity detection unit 2 that varies a voltage Vsen in accordance with a measured physical quantity; a regulator 3 that generates a low voltage from a power supply voltage supplied from the power supply terminal 7; an open-collector operational amplifier 4 that operates with the low voltage supplied from the regulator 3 to control a voltage for the sensor output terminal 8; and resistor elements 5, 6 that together form a voltage divider circuit for subjecting the voltage for the sensor output terminal 8 to voltage division.

In a sensor device 1 according to the present invention, power is supplied from a control device 10 to a power supply terminal 7 and a ground terminal 9 of the sensor device 1 via a power supply line Vcc and a ground line Gnd, respectively, and a sensor output voltage is sent from a sensor output terminal 8 to the control device 10 via a sensor output line Vout. The control device 10 has disposed therein a constant voltage source 11 that supplies a constant voltage to the sensor device 1, and a pull-up resistor 12 connected between the sensor output line Vout and the constant voltage source 11. The sensor device 1 comprises: a physical quantity detection unit 2 that varies a voltage Vsen in accordance with a measured physical quantity; a regulator 3 that generates a low voltage from a power supply voltage supplied from the power supply terminal 7; an open-collector operational amplifier 4 that operates with the low voltage supplied from the regulator 3 to control a voltage for the sensor output terminal 8; and resistor elements 5, 6 that together form a voltage divider circuit for subjecting the voltage for the sensor output terminal 8 to voltage division.

The disclosure relates to an isolation and voltage regulation circuit for an electrochemical power source, the circuit comprising: an input terminal (202) for coupling to the power source and receiving an input voltage (Vin) from the power source; an output terminal (204) for coupling to a load; a diode circuit (206) connected between the input terminal and the output terminal; a diode controller (208) configured to control electrical conduction through the diode circuit between the input terminal and the output terminal, the diode controller having a first controller input (210) coupled to the output terminal and a second controller input (212); and a reference controller (220) configured to set a voltage at the second controller input (212) in accordance with a comparison between the input voltage (Vin) and a reference voltage (Vref).

The disclosure relates to an isolation and voltage regulation circuit for an electrochemical power source, the circuit comprising: an input terminal (202) for coupling to the power source and receiving an input voltage (Vin) from the power source; an output terminal (204) for coupling to a load; a diode circuit (206) connected between the input terminal and the output terminal; a diode controller (208) configured to control electrical conduction through the diode circuit between the input terminal and the output terminal, the diode controller having a first controller input (210) coupled to the output terminal and a second controller input (212); and a reference controller (220) configured to set a voltage at the second controller input (212) in accordance with a comparison between the input voltage (Vin) and a reference voltage (Vref).

A device, including: a sensor circuit that senses the state of contact impedance of a mechanical electrical switch; and a switch-off circuit that represents a sensed high impedance contact of the switch as a low or constant impedance, where the sensor circuit detects an open or closed condition of the switch by sensing a voltage across the switch passing a threshold value.

A driver shutdown circuit configured to trigger driver shutdown based on the magnitude and duration of the driving current. A first GaN FET is connected to a second GaN FET and an input node and generates a discharging current proportional to the driving current. The discharging current is drawn from a timer capacitor through the first and second GaN FETs. The second GaN FET receives a control signal and stops flow of the discharging current in between driver pulses so a pre-charger circuit can recharge the timer capacitor to a particular voltage. The discharging current drains the timer capacitor, and a shutdown signal generator outputs a shutdown signal to the driver in response to the voltage on the timer capacitor decreasing below a triggering voltage.

A power supply system includes a plurality of sweep modules that is connected to a main line. Each sweep module includes a switching element that switches between connection and disconnection between a battery module and the main line and is formed of a MOSFET. A failure detecting device of the power supply system includes a temperature detecting unit configured to detect temperatures of the plurality of sweep modules and a failure determining unit configured to determine whether a difference between a temperature of one sweep module selected from the plurality of sweep modules and a reference temperature which is determined based on the temperatures of other sweep modules is greater than a predetermined threshold value.

A method for identifying correct operation of an electrical switching unit, having a full bridge circuit and inductive load operated by the full bridge circuit. The full bridge circuit includes a first semiconductor switching element supplying the inductive load with a first supply voltage potential and a second semiconductor switching element supplying the inductive load with a second supply voltage potential, having a smaller value than the first supply voltage potential. The first and second semiconductor switching element each have a diode. The method determines that the first semiconductor switching element changes from an activated state into a deactivated state, measures a voltage applied to the second semiconductor switching element, compares the measured voltage with a first threshold and detecting that, if the measured voltage on the second semiconductor switching element falls below the second supply voltage potential by the predefined first threshold, the electrical switching unit is operating correctly.

A method for identifying correct operation of an electrical switching unit, having a full bridge circuit and inductive load operated by the full bridge circuit. The full bridge circuit includes a first semiconductor switching element supplying the inductive load with a first supply voltage potential and a second semiconductor switching element supplying the inductive load with a second supply voltage potential, having a smaller value than the first supply voltage potential. The first and second semiconductor switching element each have a diode. The method determines that the first semiconductor switching element changes from an activated state into a deactivated state, measures a voltage applied to the second semiconductor switching element, compares the measured voltage with a first threshold and detecting that, if the measured voltage on the second semiconductor switching element falls below the second supply voltage potential by the predefined first threshold, the electrical switching unit is operating correctly.