摘要:
A radio frequency (RF) power amplifying system. The power amplifying system includes a power controller and power amplifiers (220) comprising power transistors (354, 358) and bias circuitry (310). The bias circuitry provides current to the base of the one or more power transistors (354, 358) in such a manner as to automatically maintain the power transistors in substantially linear operation throughout the variation in voltage as supplied by the power controller.
摘要:
An amplifier module includes a module substrate. Conductive interconnect structures and an amplifier device are coupled to a top surface of the module substrate. The interconnect structures partially cover the module substrate top surface to define conductor-less areas at the top surface. The amplifier device includes a semiconductor substrate, a transistor, a conductive feature coupled to a bottom surface of the semiconductor substrate and to at least one of the interconnect structures, and a filter circuit electrically coupled to the transistor. The conductive feature only partially covers the semiconductor substrate bottom surface to define a conductor-less region that spans a portion of the bottom surface. The conductor-less region is aligned with at least one of the conductor-less areas at the module substrate top surface. The filter circuit includes a passive component formed over a portion of the semiconductor substrate top surface that is directly opposite the conductor-less region.
摘要:
A negative group delay circuit (200, 300) comprising a negative group delay component (205, 600, 100), also comprising a circulator (220, 320) with three ports (206, 207, 250), further comprising a first resonator (230), with the negative group delay component (205) arranged between an input port (210) of the negative group delay circuit (200, 300) and a first port (206) in the circulator (220, 320). The first resonator (230) is arranged between a second port (207) of the circulator (220, 320) and a first reflection amplifier (240), so that signals reflected from the first reflection amplifier (240) to the second port (207) of the circulator (220; 320) through the first resonator (230) are emitted at the third port (250) of the circulator (220; 320). The third port is arranged to be used as an output port of the negative group delay circuit (200, 300).
摘要:
A high-output electric power amplifier using a depression-type FET includes a drain voltage supply portion 120, 220, and 320 adapted to create a positive voltage to be applied to a drain terminal in the depression-type FET, and a gate bias voltage supply portion 130, 230, and 330 adapted to create a negative voltage to be applied to a gate terminal in the depression-type FET, wherein the drain voltage supply portion uses an external commercial power supply as an electric power source, and the gate bias voltage supply portion uses a battery as an electric power source, in order to certainly prevent breakdowns of the FET due to excessive electric currents.
摘要:
A high-output electric power amplifier using a depression-type FET includes a drain voltage supply portion 120, 220, and 320 adapted to create a positive voltage to be applied to a drain terminal in the depression-type FET, and a gate bias voltage supply portion 130, 230, and 330 adapted to create a negative voltage to be applied to a gate terminal in the depression-type FET, wherein the drain voltage supply portion uses an external commercial power supply as an electric power source, and the gate bias voltage supply portion uses a battery as an electric power source, in order to certainly prevent breakdowns of the FET due to excessive electric currents.
摘要:
An amplifier having a pair of transistors arranged in a cascode amplifier arrangement serially connected to a first voltage source. A DC bias regulator is provided having: a DC bias circuit for producing a reference voltage at a control electrode of a first one of the pair of transistors: and a voltage combiner having a pair of inputs, a first of the pair of inputs being coupled to the reference voltage and a second one of the pair of inputs being coupled to the first voltage source. The DC bias regulator produces a DC bias voltage at a control electrode of a second one of the pair of transistors related to a combination of the reference voltage and the first voltage source.
摘要:
Embodiments of RF amplifiers and packaged RF amplifier devices each include a transistor, an impedance matching circuit, and a video bandwidth circuit. The impedance matching circuit is coupled between the transistor and an RF I/O (e.g., an input or output lead). The video bandwidth circuit is coupled between a connection node of the impedance matching circuit and a ground reference node. The video bandwidth circuit includes a plurality of components, which includes an envelope inductor and an envelope capacitor coupled in series between the connection node and the ground reference node. The video bandwidth circuit further includes a first bypass capacitor coupled in parallel across one or more of the plurality of components of the video bandwidth circuit.
摘要翻译:RF放大器和封装RF放大器器件的实施例均包括晶体管,阻抗匹配电路和视频带宽电路。 阻抗匹配电路耦合在晶体管和RF I / O(例如输入或输出引线)之间。 视频带宽电路耦合在阻抗匹配电路的连接节点和接地参考节点之间。 视频带宽电路包括多个组件,其包括串联耦合在连接节点和接地参考节点之间的包络电感器和包络电容器。 视频带宽电路进一步包括跨越视频带宽电路的多个组件中的一个或多个并行耦合的第一旁路电容器。