Patent ID: 6225928
Filing Date: 2001-05-01
Classification: H03M

Abstract:
An analog-to-digital converter, comprising:real and imaginary input signals;a real path quantizer having a real digital output signal;an imaginary path quantizer having an imaginary digital output signal; anda complex loop filter coupled to receive the real and imaginary input signals and to provide output signals to the real and imaginary path quantizers, said complex loop filter including a plurality of non-linear resonators connected together and acting as a linear complex operator the plurality of non-linear resonators being connected in series so that the output of a previous resonator is coupled to the input of the next resonator:wherein a plurality of outputs from the non-linear resonators are combined to provide an output to the real path quantizer: andwherein a plurality of outputs from the non-linear resonators are combined to provide an output to the imaginary path quantizer.