Methods and devices for reducing gate node instability of a differential cascode amplifier are presented. Ground return loops, and therefore corresponding parasitic inductances, are eliminated by using voltage symmetry at nodes of two cascode amplification legs of the differential cascode amplifier. Series connected capacitors are coupled between gate nodes of pairs of cascode amplifiers of the two cascode amplification legs so to create a common node connecting the two capacitors. In order to reduce peak to peak voltage variation at the common node under large signal conditions, a shunting capacitor is connected to the common node.

The present application discloses a transconductance amplifier and a related chip. The transconductance amplifier is configured to generate an output current according to a positive input voltage and a negative input voltage, wherein the transconductance amplifier includes: an input stage, configured to receive the positive input voltage and the negative input voltage and generate a positive output current and a negative output current, wherein the input stage includes: a first transistor, wherein a gate thereof is coupled to the positive input voltage; a second transistor, wherein a gate thereof is coupled to the negative input voltage; a first resistor, serially connected between the first transistor and the second transistor; a third transistor, wherein a source of the third transistor is coupled between the first resistor and the first transistor, and a drain of the third transistor is configured to output the positive output current; and a fourth transistor.

An aerosol delivery device is provided. The aerosol delivery device includes terminals configured to connect a power source to the aerosol delivery device and a heating element configured to convert electricity to heat and thereby vaporize components of an aerosol precursor composition. The aerosol delivery device also includes a boost converter configured to step up voltage from the power source to a higher voltage and an inverter configured to convert the higher voltage to a complementary negative voltage. The aerosol delivery device further includes at least one non-inverting amplifier circuit that includes an operational amplifier configured to receive the voltage from the power source as an input voltage, and receive the higher voltage and the complementary negative voltage as supply voltages. The at least one non-inverting amplifier circuit is configured to amplify the input voltage to an output voltage, and provide a continuous output current.

A power amplifier circuit includes a power amplifier that amplifies the power of a high frequency signal, a power amplifier temperature detector circuit that includes a temperature detection element, the temperature detection element being thermally coupled with the power amplifier, a bias control signal generator circuit that generates a bias control signal for the power amplifier based on a temperature detection signal outputted from the power amplifier temperature detector circuit, and a regulator circuit that stabilizes the temperature detection signal. The power amplifier, the power amplifier temperature detector circuit, and the regulator circuit are formed in a first integrated circuit, and the bias control signal generator circuit is formed in a second integrated circuit. The substrate material (for example, GaAs) of the first integrated circuit has a higher cutoff frequency than the substrate material (for example, SOI) of the second integrated circuit.

A front-end amplifier circuit for receiving a biological signal includes a signal channel. The signal channel amplifies the biological signal to generate a detection current and includes a capacitive-coupled transconductance amplifier. The capacitive-coupled transconductance amplifier amplifies the biological signal with a transconductance gain to generate a first current.

The present invention includes a current integrator for an organic light-emitting diode (OLED) panel. The current integrator includes an operational amplifier, which includes an output stage. The output stage, coupled to an output terminal of the current integrator, includes a first output transistor, a second output transistor, a first stack transistor and a second stack transistor. The first stack transistor is coupled between the first output transistor and the output terminal. The second stack transistor is coupled between the second output transistor and the output terminal.

Disclosed herein are related to a system and a method of amplifying an input voltage based on cascaded charge pump boosting. In one aspect, first electrical charges are stored at a first capacitor according to the input voltage to obtain a second voltage. In one aspect, the second voltage is amplified according to the first electrical charges stored by the first capacitor to obtain a third voltage. In one aspect, second electrical charges are stored at the second capacitor according to the third voltage. In one aspect, the third voltage is amplified according to the second electrical charges stored by the second capacitor to obtain a fourth voltage.

An on-board charging device includes an AC connector, an AC to DC converter and a detection circuit. The AC connector is configured to be connected to an electric vehicle supply equipment (EVSE), so that a protective earth terminal of EVSE is electrically connected to a protective earth terminal of the on-board charging device. The AC to DC converter is electrically connected to the AC connector, and the AC to DC converter is configured to convert an AC voltage provided by the EVSE into a DC voltage. The AC to DC converter has a reference ground terminal. The detection circuit outputs a detection voltage based on the voltage difference between the protective earth terminal of the on-board charging device and the reference ground terminal of the AC to DC converter. The detection voltage reflects whether the protective earth terminal of the EVSE is abnormal or not.

A calibration circuit configured to calibrate a signal of a sensing unit comprises: an amplifier, a first impedance element and a second impedance element. The amplifier has a first input terminal, a second input terminal and an output terminal. The first input terminal is coupled to a first terminal of the sensing unit, the second input terminal is coupled to a reference voltage, and the output terminal is feedback to the first input terminal and outputs the readout signal. A first terminal of the first impedance element is coupled to the first input terminal of the amplifier, and a second terminal of the first impedance element is coupled to a calibration voltage. A first terminal of the second impedance element is coupled to the first terminal of the first impedance element, and a second terminal of the second impedance element is coupled to the output terminal of the amplifier.

Disclosed herein are related to a system and a method of amplifying an input voltage based on cascaded charge pump boosting. In one aspect, first electrical charges are stored at a first capacitor according to the input voltage to obtain a second voltage. In one aspect, the second voltage is amplified according to the first electrical charges stored by the first capacitor to obtain a third voltage. In one aspect, second electrical charges are stored at the second capacitor according to the third voltage. In one aspect, the third voltage is amplified according to the second electrical charges stored by the second capacitor to obtain a fourth voltage.