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Feed-forward type triangular integral analog-to-digital modulator

A delta-sigma, analog-to-analog conversion technology, applied in analog-to-digital converters, etc., can solve problems such as unstable modulators and high power consumption

Active Publication Date: 2018-01-12
HYCON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, it is necessary to solve the problem of unstable modulator and high power consumption in the traditional technology, and provide a feedforward delta with high stability, no active circuit, and multi-bit quantization function with only one comparator. Integrating Analog-to-Digital Modulator

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  • Feed-forward type triangular integral analog-to-digital modulator
  • Feed-forward type triangular integral analog-to-digital modulator
  • Feed-forward type triangular integral analog-to-digital modulator

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Embodiment Construction

[0090] The present invention will be more specifically described with reference to the following examples. Please note that the following descriptions of the embodiments of the present invention are for illustrative purposes only; they are not meant to be exhaustive or to limit the invention to the form disclosed.

[0091] First, see figure 1 with reference Figure 8 , which shows the structure of the third-order feedforward delta-sigma analog-to-digital modulator 1. The feedforward delta-sigma analog-to-digital modulator 1 includes an input capacitor switching circuit 10 , a feedforward integrator 20 , a multi-bit quantizer 30 , a continuous progressive control circuit 40 and a data weighted average circuit 50 . The input capacitor switching circuit 10 receives the input timing control signal s125 , the input voltage s123 and the capacitor switching signal s52 , and generates an integral input signal s261 . The feedforward integrator 20 receives an integral input signal s2...

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Abstract

The invention provides a feed-forward type triangular integral analog-to-digital modulator which is integrated with a feedback circuit, an addition circuit and a quantization circuit. The integrated circuit structure has the advantage of high stability. An active circuit is not needed, and a control circuit of a continuous approximation method is adopted, so that only one comparator is used for achieving multi-position quantization function.

Description

technical field [0001] The invention relates to the field of analog-to-digital converters, in particular to a feedforward delta-sigma analog-to-digital modulator. Background technique [0002] Sigma-delta modulation (SDM for short) is widely used in various electronic components, such as analog-to-digital converters, switched capacitor filters, frequency synthesizers, and wireless communication systems. When applied to an analog-to-digital converter, since the delta-sigma modulation has the characteristic of noise shaping, the higher the order of the delta-sigma modulation, the better the effect of noise shaping, which can improve the signal-to-noise ratio (signal-to-noise ratio). -noise ratio, referred to as SNR) advantages. Since the n-order delta-sigma modulator needs n integrators to be realized, the power consumption and circuit area will be increased when the structure of the second-order or higher-order delta-sigma modulator is adopted. In addition, the higher the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/18
Inventor 陈宏维
Owner HYCON TECH