Title :
A 4/spl times/40 W digital input class-AB power DAC with 100 dB dynamic range
Author :
Meroni, C. ; Botti, E. ; Grosso, A. ; Stefani, F. ; Ghioni, M. ; Baschirotto, A.
Author_Institution :
STMicroelectronics, Politecnico di Milano, Italy
Abstract :
A 4 /spl times/ 40 W power DAC for car-radio audio systems has a 100 dB dynamic range and is realized in a 0.6 /spl mu/m BiCMOS/DMOS technology. EMI is reduced using a multi-bit DAC with a current-mode interface, DDWA algorithm and a class-AB amplifier with 2nd-order filtering. Total output noise of 25 /spl mu/V/sub RMS/ without signal yields a 110 dB SNR.
Keywords :
BiCMOS integrated circuits; audio signal processing; audio systems; digital-analogue conversion; mixed analogue-digital integrated circuits; power amplifiers; power filters; power integrated circuits; 0.6 micron; 110 dB; 2nd-order filtering; 40 W; BiCMOS/DMOS technology; DDWA algorithm; EMI reduction; car-radio audio systems; class-AB amplifier; class-AB power DAC; current-mode interface; digital input power DAC; multi-bit DAC; Circuit noise; Clocks; Dynamic range; Filtering; Interference; Noise reduction; Noise shaping; Power filters; Power generation; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2003. Digest of Technical Papers. ISSCC. 2003 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-7707-9
DOI :
10.1109/ISSCC.2003.1234235
