H03M3/404 - CPC Classification Index

ClassID:

222515 ⎘

H03M3/404 - CPC Classification

Classification description:

Conversion of analogue values to or from differential modulation; Delta-sigma modulation; Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators; Arrangements specific to bandpass modulators characterised by the type of bandpass filters used

Sub-classes:

H03M3/406 » {by the use of a pair of integrators forming a closed loop} 20
H03M3/408 » {by the use of an LC circuit} 16

Recent Application in this class:

20240154621

Systems and methods for asynchronous data communication in noisy environments

20210399734

Apparatus for mitigating wandering spurs in a fractional-N frequency synthesizer

20190131999

Modulator for a digital amplifier

20180034471

High-linearity sigma-delta converter

20160072520

Sampling/quantization converters

20150280732

Communication unit, digital band-pass sigma-delta modulator and method therefor

20150200678

Delta-sigma modulator

20140307825

Digital polar modulator for a switch mode RF power amplifier

20140055294

Resonator and oversampling A/D converter

20120262320

Resonator, delta-sigma modulator, and wireless communication device

20110169677

Resonator and oversampling A/D converter

20110050476

Integrator, resonator, and oversampling A/D converter

20100097258

Apparatus comprising frequency selective circuit and method

20080284628

Delta sigma modulator

20080197943

Cancellation of anti-resonance in resonators

20050057382

Sigma-delta modulator with passive bandpass loop filter

20050030211

Sigma-delta converter arrangement

15879024

Parameterizable bandpass delta-sigma modulator

14639381

Multi-function reconfigurable delta sigma DAC