AC stacked power amplifier for wireless terminal

Abstract

The invention discloses an AC stacked power amplifier for a wireless terminal. The power amplifier comprises an input matching single-ended to differential power supply network, an AC three-stack amplification network and an output matching differential to single-ended power supply network. According to the invention, the core architecture of the power amplifier adopts the AC three-stack amplification network, and has the characteristics of high power and high gain at low power supply voltage; and meanwhile, the good parasitic parameter inhibition of the differential amplifier in the microwavefrequency band is combined with the power synthesis characteristic of the transformer network, so the whole power amplifier obtains good high gain, high efficiency and high power output capability.

Description

technical field [0001] The invention relates to the fields of field effect transistor radio frequency power amplifiers and integrated circuits, in particular to an AC stacking power amplifier used for wireless terminals in a radio frequency microwave communication system. Background technique [0002] With the rapid development of wireless communication systems and RF microwave circuits, RF front-end transceivers are also developing in the direction of high performance, high integration, and low power consumption. Therefore, the market urgently needs the radio frequency and microwave power amplifier of the transmitter to have high output power, high gain, high efficiency, low cost and other performances. However, when using integrated circuit technology to design and implement RF and microwave power amplifier chip circuits, its performance and cost are subject to certain constraints, mainly reflected in: [0003] (1) High power and high efficiency capabilities are limited: ...

AI Technical Summary

Problems solved by technology

[0003] (1) High power and high efficiency capabilities are limited: typical power amplifiers use a multi-channel parallel combination structure or a distributed structure. The combination efficiency of these two structures is limited, resulting in part of the power loss in the combination network, which limits high power. , high efficiency capability

[0004] (2) The low voltage amplification capability is limited: in order to increase the output power of the amplifier, a transistor stack structure is often used to increase the bias voltage of the amplifier and at the same time increase the AC voltage swing

The interstage stacking structure of conventional differential stacked transistors is directly connected to DC and AC. This connection structure requires high-voltage power supply, which cannot adapt to the low-voltage power supply trend of today's communication system terminals.

[0005] It can be seen from this that the design difficulties of high-gain and high-power amplifiers based on integrated circuit technology are: high power and high efficiency output is difficult; under the low-voltage power supply requirements of today's communication system terminals, the typical high-voltage power supply stack structure There are certain defects and deficiencies

Images