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All-digital TX frequency synthesizer and discrete-time receiver for Bluetooth radio in 130-nm CMOS

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21 Author(s)
Staszewski, R.B. ; Wireless Analog Technol. Center, Texas Instrum. Inc., Dallas, TX, USA ; Muhammad, K. ; Leipold, D. ; Chih-Ming Hung
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We present a single-chip fully compliant Bluetooth radio fabricated in a digital 130-nm CMOS process. The transceiver is architectured from the ground up to be compatible with digital deep-submicron CMOS processes and be readily integrated with a digital baseband and application processor. The conventional RF frequency synthesizer architecture, based on the voltage-controlled oscillator and the phase/frequency detector and charge-pump combination, has been replaced with a digitally controlled oscillator and a time-to-digital converter, respectively. The transmitter architecture takes advantage of the wideband frequency modulation capability of the all-digital phase-locked loop with built-in automatic compensation to ensure modulation accuracy. The receiver employs a discrete-time architecture in which the RF signal is directly sampled and processed using analog and digital signal processing techniques. The complete chip also integrates power management functions and a digital baseband processor. Application of the presented ideas has resulted in significant area and power savings while producing structures that are amenable to migration to more advanced deep-submicron processes, as they become available. The entire IC occupies 10 mm2 and consumes 28 mA during transmit and 41 mA during receive at 1.5-V supply.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:39 ,  Issue: 12 )
RFIC Virtual Journal, IEEE

Date of Publication:

Dec. 2004

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