A radio frequency (RF) power combining amplifier circuit has a circuit input and a circuit output. A first amplifier is connected to the circuit input and to a first bias input. A first output matching network is connected to an output of the first amplifier and to the circuit output. A second amplifier is connected to the circuit input and to a second bias input. A second output matching network is connected to an output of the second amplifier, and to the circuit output. A voltage level of an input signal applied to the circuit input, together with the respective first bias input and the second bias input, selectively activates the first amplifier and the second amplifier.

A radio frequency (RF) power combining amplifier circuit has a circuit input and a circuit output. A first amplifier is connected to the circuit input and to a first bias input. A first output matching network is connected to an output of the first amplifier and to the circuit output. A second amplifier is connected to the circuit input and to a second bias input. A second output matching network is connected to an output of the second amplifier, and to the circuit output. A voltage level of an input signal applied to the circuit input, together with the respective first bias input and the second bias input, selectively activates the first amplifier and the second amplifier.

A cascode power cell for a power amplifier circuit includes a radio frequency signal input node, a radio frequency signal output node, and a plurality of sub-cells each including a first transistor having a collector coupled to the radio frequency signal output node, each of the plurality of sub-cells further including a second transistor having a collector coupled to an emitter of the first transistor at a connection node, and a base coupled to the radio frequency signal input node, the connection nodes for each of the plurality of sub-cells being electrically isolated from one another.

A cascode power cell for a power amplifier circuit includes a radio frequency signal input node, a radio frequency signal output node, and a plurality of sub-cells each including a first transistor having a collector coupled to the radio frequency signal output node, each of the plurality of sub-cells further including a second transistor having a collector coupled to an emitter of the first transistor at a connection node, and a base coupled to the radio frequency signal input node, the connection nodes for each of the plurality of sub-cells being electrically isolated from one another.

The disclosure provides an amplifier. The amplifier includes a first transistor that receives a first input and generates a first load current. A first output node is coupled to a power supply through a first load resistor. The first load resistor receives the first load current. A first capacitor network is coupled to the first output node and draws a first capacitive current from the first output node. A first current buffer is coupled between the first output node and the first transistor. A current through the first current buffer is a summation of the first load current and the first capacitive current.

The disclosure provides an amplifier. The amplifier includes a first transistor that receives a first input and generates a first load current. A first output node is coupled to a power supply through a first load resistor. The first load resistor receives the first load current. A first capacitor network is coupled to the first output node and draws a first capacitive current from the first output node. A first current buffer is coupled between the first output node and the first transistor. A current through the first current buffer is a summation of the first load current and the first capacitive current.

The present disclosure relates to methods, modules and devices for detecting and preventing occurrence of a saturation state in a power amplifier. A method is disclosed for detecting a saturation condition of a power amplifier, including monitoring a first base current of a first transistor of a cascade transistor pair of the power amplifier and a second base current of a second transistor of the cascade transistor pair. The method can also include generating a current ratio based on comparing the first base current and the second base current. The method can further include determining if the current ratio exceeds or satisfies a threshold value and modifying one or more operating characteristics of the power amplifier in accordance with a determination that the current ratio exceeds or satisfies the threshold value.

The present disclosure relates to methods, modules and devices for detecting and preventing occurrence of a saturation state in a power amplifier. A method is disclosed for detecting a saturation condition of a power amplifier, including monitoring a first base current of a first transistor of a cascade transistor pair of the power amplifier and a second base current of a second transistor of the cascade transistor pair. The method can also include generating a current ratio based on comparing the first base current and the second base current. The method can further include determining if the current ratio exceeds or satisfies a threshold value and modifying one or more operating characteristics of the power amplifier in accordance with a determination that the current ratio exceeds or satisfies the threshold value.

A wireless receiver and a wireless reception method provide: to determine a gain based on a first resistor having a first temperature characteristic and a second resistor having a second temperature characteristic different from the first resistance; to output an output of the first resistor and an output of the second resistor, or a ratio between the output of the first resistor and the output of the second resistor; and to switches the gain of the first circuit based on the outputs or the ratio between the outputs.

The present invention discloses a matching circuit with switchable load lines, a load line switching method and a power amplifier. The matching circuit matches the output impedance of the power amplifier, which amplifies an input signal and outputs an amplified signal. The matching circuit comprises a filter circuit and a switch group for load line selection, the output end of the filter circuit is connected to the switch group. The switch group comprises at least two independent switches, each switch independently constitutes a signal line, and each switch is configured with an external control signal to control on/off. The matching circuit provided by the invention adopts a switch group composed of at least two independent switches, and each independent switch forms a signal line to connect loads, so that multiple loads can be connected at the same time.