Title :
A 3-level PWM ADSL2+ CO line driver
Author :
Gierkink, Sander ; Lakshmikumar, Kadaba ; Mukundagiri, Vinod ; Lim, Drahoslav ; Muralt, Arnold ; Larsen, Fred
Author_Institution :
Conexant Syst. Inc., CA, USA
Abstract :
A PWM ADSL2+ line driver with 2.2 MHz signal bandwidth is realized in a 3 metal, 2 poly 0.35 mum CMOS process. A low 8.832 MHz switching frequency is used with filtering in the feedback path to suppress aliasing. Signal processing and triangular wave generation are combined in the forward integrators. The driver delivers 100 mW to a 100 Omega line with an MTPR less than -52 dB. Active area is 3 mm2.
Keywords :
CMOS digital integrated circuits; digital subscriber lines; driver circuits; pulse width modulation; CMOS process; MTPR; PWM ADSL2+ central office line driver; feedback path filtering; frequency 2.2 MHz; frequency 8.832 MHz; pulse width modulation; signal processing; size 0.35 mum; switching frequency; triangular wave generation; Bandwidth; CMOS process; CMOS technology; Driver circuits; Feedback; Low pass filters; OFDM modulation; Pulse width modulation; Signal processing; Switching frequency;
Conference_Titel :
Custom Integrated Circuits Conference, 2009. CICC '09. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-4071-9
Electronic_ISBN :
978-1-4244-4073-3
DOI :
10.1109/CICC.2009.5280764
