DIGITAL TRANSMISSION SYSTEM WITH A DOUBLE ANALOG INTEGRATOR DELTA SIGMA CODER AND A DOUBLE DIGITAL INTEGRATOR DELTA SIGMA DECODER

摘要

ABSTRACT OF THE DISCLOSUREDelta-Sigma noise-shaping coder with two analog integrators andDelta-Sigma decoder with two digital integrators. The coder comprisesan operational amplifier with two analog integrators in its feedbackloop and two cascaded flipflops both connected to the input of the ope-rational amplifier through resistors having a predetermined ratio. Theconfiguration of the integrators is particular and results of the iden-tification of the z-transfer function of the coder to be designedwith the p-transfer function of a known integrator (p, Laplace's variable)The decoder comprises a digital integrator- filter of order two and twocascaded flipflops both connected to the input of the filter throughamplifiers having gains in a predetermined ratio.