Introduction
The CU6350 is a Class-D audio amplifier, featuring a bridge-tie load (BTL), or differential speaker output. This project is made under instruction of Professor Peter Kinget in ELEN6350 VLSI Design Lab course in Spring and Fall 2014. The fabrication of the design is made possible by MOSIS under their MPW educational program. We thank them for their generosity and support.
The CU6350 will amplify an audio signal, in 20Hz-20kHz with a gain 10. It also provides the current driving capability for 8Ω speaker output. It requires a 1.8V regulated supply voltage. An external 500kHz triangular wave generator is also required. This is a design decision due to the uncertainty of on-chip passive elements might cause inaccuracy of switch frequency. A LC low-pass filter is connected to the differential output, and the CU6350 is capable of driving 140mW into 8Ω before clipping.
