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Renesas Unveils Bluetooth RF Transceiver Technologies

Renesas presented these technologies at International Solid-State Circuits Conference 2022 (ISSCC 2022), held between February 20 and 24 in San Francisco.

Renesas Electronics Corporation has developed two 2.4 GHz RF transceiver technologies that support the Bluetooth Low Energy (LE) low-power, near-field communication standard.

Renesas Bluetooth RF Transceiver Technologies
Reference Signal Self-Correction Circuit Technology Eliminating Need for Calibration Circuit (Self-IQ-Phase Correction, SIQC)

The new technologies also achieve a smaller mounting area and better power efficiency.

Renesas presented these technologies at International Solid-State Circuits Conference 2022 (ISSCC 2022), held between February 20 and 24 in San Francisco.

In addition to being compact, low cost, and power-efficient, IoT devices must provide flexible support for Bluetooth LE regardless of their implementation format.

Renesas has developed two new technologies to address these requirements: 1) a matching circuit technology that covers a wide impedance range and enables the IC to match a variety of antenna and board impedances without an external impedance-matching circuit; 2) a signal correction technology for locally generated reference signals that use a small circuit to self-correct inconsistencies in the circuit elements and variations in surrounding conditions without calibration.

Renesas has verified the effectiveness of these technologies on a Bluetooth LE RF transceiver circuit prototype built with a 22-nm CMOS process. With these new technologies, Renesas reduced the circuit area including the power supply to 0.84 mm2, the world’s smallest device of this type.

This was achieved by modifying the receiver architecture to reduce the number of inductors and making enhancements such as a low-current baseband amplifier with a small mounting area and a highly efficient Class-D amplifier.

They offer best-in-class power efficiency, with a power consumption of 3.6 mW and 4.1 mW during reception and transmission respectively. These advances enable smaller size, reduced board cost, and lower power consumption while simplifying the board design process.

These technologies apply to different types of RF transceivers in addition to Bluetooth LE, and Renesas is currently working on practical applications for these technologies.

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Aishwarya Saxena

A book geek, with creative mind, an electronics degree, and zealous for writing.Creativity is the one thing in her opinion which drove her to enter into editing field. Allured towards south Indian cuisine and culture, love to discover new cultures and their customs. Relishes in discovering new music genres.

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