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Triangular integration modulator and related method thereof

A delta-sigma, modulator technology, applied in delta modulation and other directions, can solve problems such as system distortion and signal nonlinearity

Inactive Publication Date: 2011-08-24
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the non-linear resistance of this switch may cause the signal to be non-linear, thus causing distortion to the system.

Method used

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  • Triangular integration modulator and related method thereof
  • Triangular integration modulator and related method thereof
  • Triangular integration modulator and related method thereof

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Embodiment Construction

[0044] Certain terms are used in the specification and subsequent claims to refer to particular elements. It should be understood by those skilled in the art that hardware manufacturers may use different terms to refer to the same element. This description and subsequent patent applications do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. The "comprising" mentioned throughout the specification and subsequent claims is an open-ended term, so it should be interpreted as "including but not limited to". Otherwise, the term "coupled" includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0045] ...

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Abstract

A sigma-delta modulator comprises a loop filter for filtering an addition signal to generate a filtered signal; a single-bit quantizer coupled with the loop filter for quantizing the filtered signal to generate a quantized signal; a single-bit adjustable digital / analog converter coupled with the single-bit quantizer, having an adjustable configuration and used for generating a feedback signal according to the quantized signal and the configuration; and an adder coupled with the loop filter and the single-bit adjustable digital / analog converter for adding an input signal to the feedback signalto generate the addition signal.

Description

technical field [0001] The present invention relates to delta-sigma modulators, and more particularly to delta-sigma modulators using adjustable configuration digital-to-analog converters. Background technique [0002] In the field of signal processing, a delta-sigma modulator (Sigma-DeltaModulator) is often used to process signals. Delta-sigma modulators can be divided into many types: continuous time, discrete time, and a Order (order) or multi-order, single or multi-bit, etc. Generally speaking, if the dynamic range of the input signal is to be increased, the order or number of bits of the delta-sigma modulator must be increased. However, if the order is increased, the state will be unstable, and if the number of bits is increased, without additional processing, a nonlinear feedback signal will be introduced, making the summed signal nonlinear, thereby reducing the linearity of the overall system. Figure 1A shows this situation, as Figure 1A As shown, the feedback sign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M3/02
Inventor 白洪全杨朝栋
Owner MEDIATEK INC
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