Double-frequency radio-frequency power amplifier circuit chip

Abstract

The invention discloses a double-frequency radio-frequency power amplifier circuit chip. A radio-frequency power amplifier circuit in the chip comprises a radio-frequency power amplifier module and two output matching networks which are connected in parallel at the back of the radio-frequency power amplifier module; the outputs of the two output matching networks are all connected to a high-isolation radio-frequency switch which is connected or disconnected with a selected output matching network; the output of the output matching network is taken as the output of the chip and then is connected to a radio-frequency antenna; and the double-frequency radio-frequency power amplifier circuit chip also comprises a CMOS controller which provides control signals for the radio-frequency power amplifier circuit. The high-isolation radio-frequency switch is adopted to select the output matching networks; the circuit structure is simple; various parts of the double-frequency radio-frequency power amplifier circuit are integrated into the same chip so as to improve integration level and reduce cost; and the performance is ensured not to be influenced.

Description

technical field [0001] The invention relates to a semiconductor chip, in particular to a dual-frequency radio frequency power amplifier circuit chip. Background technique [0002] In modern wireless communication systems, RF power amplifiers are key components for wireless transmission of RF signals. Due to the increase in the number of mobile communication users, a single frequency resource is far from being able to meet the needs of users for calls, and mobile communication providers are required to open up new frequency bands to expand user capacity. Therefore, multi-frequency mobile phones are widely used. A multi-frequency mobile phone refers to a mobile phone that can use different frequency bands for transmission in the same mobile communication network standard. Since different frequency bands are used for transmission, radio frequency power amplifiers of different frequency bands also need to be used in the mobile phone for implementation. [0003] In the existing...

AI Technical Summary

Problems solved by technology

However, the number of single-frequency RF power amplifier dies has not been reduced, so the cost reduction is relatively small, about 10%.

Moreover, the vast majority of existing technologies use independently packaged RF switches to connect the RF power amplifier to the antenna end, thus occupying a large space on the mobile phone board, increasing the complexity of the layout of the mobile phone board and the overall volume of the mobile phone, and the overall solution cost increased

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