Chip of double-frequency radio-frequency power amplifier circuit

Abstract

The invention discloses a chip of a double-frequency radio-frequency power amplifier circuit. A radio-frequency power amplifier circuit in the chip comprises two radio-frequency power amplifier modules and two output matching networks which are positioned behind the two radio-frequency power amplifier modules and are respectively connected with the two radio-frequency power amplifier modules, outputs of the two output matching networks are connected to a high-isolation radio-frequency switch which is used for switching on or switching off the selected output matching network, the output of theoutput matching network is used as the output of the chip, output stages of the two radio-frequency power amplifier modules are arranged in parallel and in the same direction on the chip, i.e. triodes of the output stages are arranged in a parallel-strip structure way, and output directions of the two output stages on the chip are same and parallel. Last stages of the radio-frequency power amplifier circuits of two frequency ranges, i.e. radio-frequency amplifier tubes at the power output stage, are arranged in parallel and in the same direction, and therefore, the invention reduces area of the double-frequency power amplifier chip, saves the cost and lowers the radio-frequency interference between frequency ranges.

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 to implement. Therefore, the multi-band radi...

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Problems solved by technology

[0004] This GSM / DCS dual-frequency power amplifier module can amplify the power of radio frequency signals in two different working frequency bands, which solves the shortcomings of traditional power amplifiers that can only work at a single frequency, but this GSM / DCS dual-frequency The two RF power amplifier chips in the power amplifier module are generally realized separately by GaAs HBT process, which increases the area and cost of the module

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