Edell, Shapiro & Finnan, LLC
Sigma-delta modulator with shared operational amplifier and associated method
A Sigma-Delta modulator with a shared operational amplifier (op-amp) includes an integrated circuit, having two integrators sharing the op-amp, capable of integrating two input signals of the two integrators; a plurality of quantizers, coupled to the integrating circuit, for comparing outputting signals of the integrators with a predetermined signal and then generating digital outputting signals; a plurality of DACs, respectively coupled to the quantizers, for converting the digital outputting signals to analog feedback signals to the integrators; and a clock generator, for providing clock signals to the integrating circuit and the quantizers. Accordingly, layout area and power consumption of the modulator are reduced due to the shared op-amp.
MStar Semiconductor, Inc.
H H
H03M H03M
additional inventional
Jianqiu Jianping Sterling
Chen Cheng Smith