Title :
A 117mW 77GHz receiver in 65nm CMOS with ladder structured tunable VCO
Author :
Berenguer, Roc ; Liu, Gui ; Akhiyat, Abe ; Kamtikar, Keya ; Xu, Yang
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Inst. of Technol., Chicago, IL, USA
Abstract :
A low power 77GHz receiver, suitable to be used in a FM-CW Automotive Radar has been designed using a 1P6M 65nm RFCMOS process. It has been implemented using a direct conversion architecture. The 77GHz signal generation block generates a FM-CW signal that pre-drives the external PA with a power level of -4.5dBm and also works as a Local Oscillator (LO) signal in the downconversion mixer. The ladder structured CPW differential transmission line used in the VCO core presents an inductance value of 83pH and a quality factor of 30 at 77GHz. By cutting the different ladders of the inductor, together with the implemented varactors, a tuning range of 15.8% is measured for the VCO, which is suitable to cover process variations. The front-end exhibits a maximum voltage gain of 15 dB over the baseband and presents a LNA noise figure of 7dB at 77GHz. The VCO measured phase noise is -109dBc/Hz at 10MHz. The achieved power consumption of the complete receiver is only 117mW from a 1.5V voltage supply, 43.5mW coming from the receiver block and 73.5mW from the signal generation block.
Keywords :
CMOS analogue integrated circuits; CW radar; FM radar; Q-factor; circuit tuning; coplanar waveguides; ladder networks; low noise amplifiers; low-power electronics; phase noise; radar receivers; radiofrequency integrated circuits; road vehicle radar; signal generators; varactors; voltage-controlled oscillators; FM-CW automotive radar; FM-CW signal; LNA; RFCMOS process; direct conversion architecture; downconversion mixer; frequency 77 GHz; gain 15 dB; inductance value; ladder structured CPW differential transmission line; ladder structured tunable VCO; local oscillator signal; low power receiver; noise figure 7 dB; phase noise; power 117 mW; power 43.5 mW; power 73.5 mW; quality factor; signal generation block; size 65 nm; varactor; voltage 1.5 V; CMOS integrated circuits; Mixers; Noise measurement; Receivers; Transistors; Transmission line measurements; Voltage-controlled oscillators;
Conference_Titel :
ESSCIRC, 2010 Proceedings of the
Conference_Location :
Seville
Print_ISBN :
978-1-4244-6662-7
DOI :
10.1109/ESSCIRC.2010.5619751
