An integrated circuit, comprising an amplifier comprising a pair of inputs configured to receive a differential signal, a first resistor, a second resistor, wherein the first resistor and the second resistor are coupled in series with each other and coupled to a first input of the pair of inputs, a third resistor, a fourth resistor, wherein the third resistor and the fourth resistor are coupled in series with each other and coupled to a second input of the pair of inputs, and a first capacitor comprising a first end coupled to a first point between the first resistor and the second resistor, and a second end coupled to a second point between the third resistor and the fourth resistor, a second capacitor disposed between the first input and an output of the amplifier; and a third capacitor disposed between the second input and the output.

The present disclosure relates to Class D amplifier circuitry comprising: an input for receiving an input signal; first and second output nodes for driving a load connected between the first and second output nodes. A first driver stage is provided for switching the first node between a first supply rail and a second supply rail, and a second driver stage is provided for switching the second node between the first supply rail and the second supply rail. The Class D amplifier circuitry also includes first driver control circuitry configured to receive a first carrier wave and control the switching of the first driver stage based in part on the first carrier wave; second driver control circuitry configured to receive a second carrier wave and control the switching of the second driver stage based in part on the second carrier wave; and a carrier wave generator configured to provide the first carrier wave and the second carrier wave. A phase shift between the first carrier wave and the second carrier wave is adjustable responsive to a mode control signal.

A receiver includes an amplifier that receives a transmission signal and amplifies a first voltage difference between the transmission signal and a reference signal to generate a first output signal and a second output signal at a first node and a second node. An equalizer is provided, which is connected to the first node and the second node and receives the transmission signal. The equalizer compensates a common-mode offset between the first output signal and the second output signal based on a second voltage difference between an average voltage level of the transmission signal and the reference signal.

A bandpass parametric amplifier circuit includes a plurality of unit cells. At least one unit cell includes a first inductor having a first node coupled to a center conductor and a second node coupled to ground. There is a first capacitor having a first node coupled to the center conductor and a second node coupled to ground. There is a second inductor having a first node coupled to the center conductor. A second capacitor has a first node coupled to a second node of the second inductor. The second capacitor and the second inductor are in series with the center conductor.

A system for controlling a plurality of light sources particularly LED's that are provided in a number of different arrangements including a light string and controlled from a controller that includes an input microphone for detecting an audio signal, at least one pre-amplifier, a microcomputer unit receiving signals from the pre-amplifier, and a circuit for driving a plurality of LED and that enables lighting control of the plurality of LED's in accordance with the input audio signal and within a wide dynamic range.

The method and system for converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for internet of things (IoT) are provided. The method includes intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The system includes a power amplification device capable of minimizing the effect of envelope impedance. The power amplification device may be incorporated in a terminal and a base station.

An amplifier includes a transistor, an input circuit coupled between an amplifier input and a transistor input terminal, and an output circuit coupled between a transistor output and a transistor output terminal. The input circuit includes an input-side harmonic termination circuit with a first inductor and a first capacitance in series between the transistor input terminal and ground. The output circuit includes a second inductor, an output-side harmonic termination circuit, and a shunt-L circuit. The second inductor is coupled between the transistor output terminal and the amplifier output. The output-side harmonic termination circuit includes a third inductor and a second capacitance in series between the amplifier output and ground. The shunt-L circuit includes a fourth inductor and a third capacitance connected in series between the amplifier output and ground. The input-side and output-side harmonic termination circuits resonate at a harmonic frequency of a fundamental frequency of operation of the amplifier.

A class-D amplifier with multiple “nested” levels of feedback. The class-D amplifier surrounds an inner feedback loop, which takes the output of a switching amplifier and corrects for errors generated across the switching amplifier, with additional feedback loops that also take the output of the switching amplifier.

An amplifier circuit includes a high-voltage output stage. The high-voltage output stage includes an output terminal, a high-side output circuit, a low-side output circuit, and a feedback circuit. The high-side output circuit sources current to the output terminal, and includes a high-side input transistor, a first high-side cascode transistor coupled to the high-side input transistor, and a second high-side cascode transistor coupled to the first high-side cascode transistor and the output terminal. The low-side output circuit sinks current from the output terminal, and includes a low-side input transistor, a first low-side cascode transistor coupled to the low-side input transistor, and a second low-side cascode transistor coupled to the first low-side cascode transistor and the output terminal. The feedback circuit is configured to bias the second high-side cascode transistor and the second low-side cascode transistor based on a sense voltage generated by the high-side output circuit or the low-side output circuit.

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.