A split-steer amplifier with an invertible phase output, includes a first transistor having its base coupled to a positive node of an input port, its emitter coupled to ground, and collector connected to a positive intermediate node; a second transistor having its base coupled to a negative node of the input port, its emitter coupled to ground, and collector connected to a negative intermediate node; and multiple output ports each having a transistor arrangement operable to couple a positive node of that output port to the positive intermediate node and a negative node of that output port to the negative intermediate node, operable to couple the positive node of that output port to the negative intermediate node and the negative node of that output port to the positive intermediate node, and operable to decouple the positive node and the negative node of that output port from the intermediate nodes.

An electronic device may include wireless circuitry with a processor, a transceiver, an antenna, and a front-end module coupled between the transceiver and the antenna. The front-end module may include one or more power amplifiers for amplifying a signal for transmission through the antenna. A power amplifier may include a phase distortion compensation circuit. The phase distortion compensation circuit may include one or more n-type metal-oxide-semiconductor capacitors configured to receive a bias voltage. The bias voltage may be set to provide the proper amount of phase distortion compensation.

Differential amplifier circuitry including: first and second main transistors of a given conductivity type; and first and second auxiliary transistors of an opposite conductivity type, where the first and second main transistors are connected along first and second main current paths passing between first and second main voltage reference nodes and first and second output nodes, respectively, with their source terminals connected to the first and second output nodes, respectively, and with their gate terminals controlled by component input signals of a differential input signal; and the first and second auxiliary transistors are connected along first and second auxiliary current paths passing between first and second auxiliary voltage reference nodes and the first and second output nodes, respectively, with their drain terminals connected to the first and second output nodes, respectively, and with their gate terminals controlled by the component input signals of the differential input signal.

Disclosed is an operational amplifier based on a metal-oxide TFT. The operational amplifier includes an auxiliary amplifier and a bootstrap gain-increasing amplifier. The auxiliary amplifier adopts a two-stage positive feedback structure, including a fifth transistor, a seventh transistor, an eleventh transistor, a first amplifying unit, and a second amplifying unit. A gate of the fifth transistor serves as an input end of the operational amplifier. The bootstrap gain-increasing amplifier includes two second circuits in mutual symmetry. Each of the second circuits includes a first transistor, a second transistor, and a current source unit with a bootstrap structure.

Differential amplifier circuitry including: first and second main transistors of a given conductivity type: and first and second auxiliary transistors of an opposite conductivity type, where the first and second main transistors are connected along first and second main current paths passing between first and second main voltage reference nodes and first and second output nodes, respectively, with their source terminals connected to the first and second output nodes, respectively, and with their gate terminals controlled by component input signals of a differential input signal; and the first and second auxiliary transistors are connected along first and second auxiliary current paths passing between first and second auxiliary voltage reference nodes and the first and second output nodes, respectively, with their drain terminals connected to the first and second output nodes, respectively, and with their gate terminals controlled by the component input signals of the differential input signal.

A low-noise amplifier comprises first and second input ports respectively configured to receive a positive and negative input voltages; first and second resonance circuit, first and second transistor; wherein a first voltage output port of the first resonance circuit is connected to the second transistor, and a second voltage output port of the second resonance circuit is connected to the first transistor, the first and second voltage output ports are crossed coupled to a second node of both the first transistor and the second transistor via a first and second capacitor respectively; the second node of the second transistor is connected to both the second input port via a third capacitor and a third node of the first transistor, and the second node of the first transistor is connected to both the first input port via a fourth capacitor and a third node of the second transistor.

A low power comparator and a self-regulated device for adjusting power saving level of an electronic device are provided. The low power comparator includes an input differential pair circuit, a self-regulated device, and a tail current switch. The input differential pair circuit is configured to receive input signals to be compared. The self-regulated device is coupled to the input differential pair circuit and includes a self-regulated circuit which has a first transistor with a first threshold voltage and a second transistor with a second threshold voltage and is configured to adjust a power saving level of the low-power comparator according to the first threshold voltage and the second threshold voltage. The tail current switch is coupled to the input differential pair circuit through the self-regulated circuit to provide a constant current to the input differential pair circuit.

The present disclosure relates to semiconductor structures and, more particularly, to a differential circuit with automatic parasitic neutralization and gain boost and methods of manufacture. The structure includes a plurality of auxiliary circuit devices with back-gate controls to perform a boost gain, and a differential pair of circuit devices which are connected to the auxiliary circuit devices.

An amplifier circuit with a differential input and a differential output comprises a first and a second pair of matched transistors having a first threshold voltage and comprising control terminals connected to the differential input. A first and a second pair of triplets of transistors having a second threshold voltage being different from the first threshold voltage is connected to each one of the pairs of matched transistors such that respective current paths are formed with these transistors. The currents are split up to bias current sources and to an output stage such that the current is reused for implementing a class AB operation. Furthermore, a current through bias transistors connected in the current path of the first and the second pair of matched transistors is mirrored to output transistors being arranged in a differential current path of the output stage.

Distributed amplifiers with controllable linearization are provided herein. In certain embodiments, a distributed amplifier includes a differential input transmission line, a differential output transmission line, and a plurality of differential distributed amplifier stages connected between the differential input transmission line and the differential output transmission line at different points or nodes. The distributed amplifier further includes a differential non-linearity cancellation stage connected between the differential input transmission line and the differential output transmission line and providing signal inversion relative to the differential distributed amplifier stages. The differential non-linearity cancellation stage operates with a separately controllable bias from the differential distributed amplifier stages, thereby providing a mechanism to control the linearity of the distributed amplifier.