TY - JOUR
T1 - A 0.5-V 1.6-mW 2.4-GHz Fractional-N All-Digital PLL for Bluetooth LE With PVT-Insensitive TDC Using Switched-Capacitor Doubler in 28-nm CMOS
AU - Pourmousavian, Naser
AU - Kuo, Feng Wei
AU - Siriburanon, Teerachot
AU - Babaie, Masoud
AU - Staszewski, Robert Bogdan
PY - 2018
Y1 - 2018
N2 - This paper proposes an ultra-low-voltage (ULV) fractional-N all-digital PLL (ADPLL) powered from a single 0.5-V supply. While its digitally controlled oscillator (DCO) runs directly at 0.5 V, an internal switched-capacitor dc-dc converter ``doubles'' the supply voltage to all the digital circuitry and particularly regulates the time-to-digital converter (TDC) supply to stabilize its resolution, thus maintaining fixed in-band phase noise (PN) across process, voltage, and temperature (PVT). The ADPLL supports a two-point modulation and forms a Bluetooth low-energy (BLE) transmitter realized in 28-nm CMOS. It maintains in-band PN of -106 dBc/Hz [figure of merit (FoM) of -239.2 dB] and rms jitter of 0.86 ps while dissipating only 1.6 mW at 40-MHz reference. The power consumption reduces to 0.8 mW during the BLE transmission when the DCO switches to open loop.
AB - This paper proposes an ultra-low-voltage (ULV) fractional-N all-digital PLL (ADPLL) powered from a single 0.5-V supply. While its digitally controlled oscillator (DCO) runs directly at 0.5 V, an internal switched-capacitor dc-dc converter ``doubles'' the supply voltage to all the digital circuitry and particularly regulates the time-to-digital converter (TDC) supply to stabilize its resolution, thus maintaining fixed in-band phase noise (PN) across process, voltage, and temperature (PVT). The ADPLL supports a two-point modulation and forms a Bluetooth low-energy (BLE) transmitter realized in 28-nm CMOS. It maintains in-band PN of -106 dBc/Hz [figure of merit (FoM) of -239.2 dB] and rms jitter of 0.86 ps while dissipating only 1.6 mW at 40-MHz reference. The power consumption reduces to 0.8 mW during the BLE transmission when the DCO switches to open loop.
KW - All-digital PLL (ADPLL)
KW - and temperature (PVT) insensitive
KW - Bluetooth
KW - Bluetooth low energy (BLE)
KW - Calibration
KW - Clocks
KW - Delays
KW - digitally controlled oscillator (DCO)
KW - Internet of Things (IoT)
KW - Oscillators
KW - Phase locked loops
KW - process
KW - regulator
KW - switched-capacitor (SC) dc-dc doubler.
KW - voltage
KW - Voltage control
UR - http://www.scopus.com/inward/record.url?scp=85049138278&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:3c861e81-e7af-4d50-88b9-ff22011f2cb5
U2 - 10.1109/JSSC.2018.2843337
DO - 10.1109/JSSC.2018.2843337
M3 - Article
AN - SCOPUS:85049138278
SN - 0018-9200
VL - 53
SP - 2572
EP - 2583
JO - IEEE Journal of Solid State Circuits
JF - IEEE Journal of Solid State Circuits
IS - 9
ER -