Reconfigurable multi-frequency-range transceiver radio-frequency front end

Abstract

The invention discloses a reconfigurable multi-frequency-range transceiver radio-frequency front end which comprises a receiver part, a transmitter part and a frequency synthesizer, wherein the receiver part comprises a low-noise amplifier, a first-stage reconfigurable lower frequency converter, a second-stage orthogonal lower frequency converter and a first medium-frequency circuit which are sequentially connected; the first medium-frequency circuit is connected with a digital baseband modem; the transmitter part comprises a second medium-frequency circuit, a first-stage low-frequency upper frequency converter, a second-stage high-frequency upper frequency converter and a power amplifier; the second medium-frequency circuit is connected with the digital baseband modem; the frequency synthesizer comprises a phase lock ring; a frequency output of the phase lock ring is connected with the first-stage reconfigurable lower frequency converter, an orthogonal oscillator and a multi-phase filter; the orthogonal oscillator is connected with the second-stage orthogonal lower frequency converter and the first-stage low-frequency upper frequency converter; and an output of the multi-phase filter is connected with the second-stage high-frequency upper frequency converter. According to a reconfiguration method, a zero medium-frequency structure and a sliding medium-frequency structure are synthesized, so that the performance of a transceiver is improved, and the power consumption of the transceiver is reduced.

Description

technical field [0001] The invention belongs to the field of radio frequency integrated circuit design of microelectronics and solid state electronics, and relates to a novel radio frequency front end of a reconfigurable multi-band transceiver. Background technique [0002] With the continuous progress of semiconductor technology, new technologies and applications are constantly emerging in the field of wireless communication, such as GSM, WLAN, 3G, Bluetooth, Zigbee, WBAN and other technologies emerge in endlessly. People increasingly hope to use a portable wireless device to meet more needs, and the portability of the device limits its volume and quality. Compatibility and functional diversity of devices require multi-band, multi-mode circuits to be integrated as much as possible, and power consumption should be as low as possible to reduce the size of the battery. [0003] The radio frequency front-end of the transceiver is an important hardware foundation of the wireles...

AI Technical Summary

Problems solved by technology

However, mismatches in the I and Q paths can degrade the performance of low-IF receivers

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