Continuous class F amplifier

Abstract

The invention discloses a continuous class F amplifier which comprises a main path impedance matching network, a bypass filtering matching network, a main path power amplification network, a bypass power amplification network and a two-path continuous class F waveform synthesis impedance matching network. A stacked amplifier based on a two-way self-bias mode is adopted as a core unit of a main-way and bypass power amplification network, a two-way continuous F-type waveform synthesis technology and a continuous F-type amplifier impedance matching technology are combined, and the output voltage waveform of the amplifier is directly shaped into a special continuously-changed voltage waveform of the continuous F-type amplifier. The impedance limitation of an output network is avoided, the impedance design space of a traditional continuous class F amplifier is optimized, and the circuit has the characteristics of ultra wide band, high gain and high power output capability.

Description

technical field [0001] The invention belongs to the technical field of field effect transistor radio frequency power amplifiers and integrated circuits, and in particular relates to the design of a continuous class F amplifier. Background technique [0002] With the development of communication technology, RF front-end transmitters urgently need ultra-wideband, high-efficiency, high-gain, and high-power power amplifiers to meet the requirements of high-speed, high-reliability, and low-power consumption in communication systems. However, in the design of traditional high-efficiency power amplifiers, the transistors have to work in an overdrive mode, similar to a switch state, which can achieve high-efficiency characteristics, but its bandwidth is very narrow, which does not meet the needs of existing systems. Therefore, the bandwidth of the high-efficiency overdrive switching power amplifier has always been the technical bottleneck of the communication system. [0003] There...

AI Technical Summary

Problems solved by technology

However, in order to form the special voltage continuous waveform of the continuous type F amplifier, the second harmonic impedance and the third harmonic impedance of the output matching circuit are resistive, but this also limits the efficiency of the continuous type F power amplifier

[0004] In addition, the existing high-efficiency FET power amplifiers are often implemented based on a single common-source transistor, which is limited by a single transistor, and the power output capability and power gain capability are relatively low

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