A 0.55 mW SAW-Less Receiver Front-End for Bluetooth Low Energy Applications

作者：Bryant Carl^*; Sjoland Henrik

来源：IEEE Journal on Emerging and Selected Topics in Circuits and Systems, 2014, 4(3): 262-272.

DOI：10.1109/JETCAS.2014.2337153

• Bluetooth low energy
• complementary metal-oxide-semiconductor (CMOS)
• frequency divider
• linearity
• mixer-first
• oscillators
• passive mixer
• receiver

This paper presents an ultra-low power direct conversion receiver front-end operating at 2.6 GHz with high out-of-band linearity and low quadrature error. This is achieved through the use of efficient mixers with improved out-of-band suppression, including rejection of the second harmonic, and an local-oscillator generator achieving current reuse and rejection of voltage-controlled oscillator signal imbalance through the use of complementary devices. Manufactured in 65 nm complementary metal-oxide-semiconductor and with a power consumption below 550 mu W from a 0.85 V supply, the front-end achieves a conversion gain of 41 dB and a noise figure of 9.6 dB. It has an out-of-band IIP3 and IIP2 of -3 dBm and 29.5 dBm, respectively. The quadrature phase error is below 0.6 degrees. Requiring only two inductors it occupies an area of just 0.15 mm(2) excluding pads.

• 出版日期2014-9