A Dynamic Oversampling Analog/Digital Converter and Its Design Method
A digital converter and oversampling technology, applied in the field of analog/digital converters, can solve problems such as long settling time, and achieve the effect of reducing area and shortening settling time
Active Publication Date: 2018-08-24
海芯科技(厦门)有限公司
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] Compared with low-order SINC filters, high-order SINC filters have wider notch width, stronger notch frequency suppression and greater stopband attenuation, especially when the output data rate is relatively high (over 1KHz) provides higher accuracy but requires longer settling time
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] see figure 1 , the dynamic oversampling A / D converter features:
[0030] Digital control module 1, the digital control module 1 is used for monitoring system parameters, said system parameters include but not limited to power-on reset and power-down enable, output data rate, input channel, channel gain, etc., as the control to enable fast recovery Signal;
[0031] The high and low order SINC filter module 2, the high and low order SINC filter module 2 is used to convert the high rate and low precision bit stream output by the front-end analog Σ-Δ modulator into a low rate and high precision digital signal output;
[0032]The input end of the digital control module 1 is externally connected to the system parameter output end of the monitoring system, the input end of the high-low order SINC filter module 2 is externally connected to the output end of the high-speed low-precision bit stream of the analog Σ-Δ modulator, and the high-low order SINC filter module The contr...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A dynamic oversampling analog to digital converter and a design method thereof relate to the analog to digital converter. The dynamic oversampling analog to digital converter is equipped with a digitized control module and a high-and-low level SINC filter module, wherein the digitized control module is in external connection with an output terminal of a monitoring system; an input terminal of the high-and-low level SINC filter module is in external connection with a high-speed low-precision bit stream output terminal of a analogue sigma-delta modulator; a control signal input terminal of the high-and-low level SINC filter module is connected with an enable quick recovery control signal output terminal of the digitized control module; and a low-speed low-precision digital signal output internal outputs a low-speed low-precision digital signal. The low-level and high-level SINC filters are combined by using the characteristic of short low-level SINC filter building time; when system parameters are changed, the first output data are output by a lower-level SINC filter from low level to high level, thereby effectively shortening the digital filter building time and realizing quickly recovered sigma-delta oversampling analog to digital converter.
Description
technical field [0001] The present invention relates to an analog / digital converter, in particular to a Σ-Δ oversampling analog / digital converter (ADC), specifically a circuit design method for a digital filter in a Σ-Δ ADC, which is used to filter out front-end analog The high-frequency quantization noise contained in the output signal of the sigma-delta modulator, while down-converting the output signal. Background technique [0002] The Σ-ΔADC uses oversampling and noise shaping technology to greatly improve the signal-to-noise ratio of the A / D converter, and it does not require high-precision analog component matching and high-performance front-end anti-aliasing filters, and can use standard CMOS technology and The integration of other digital circuit modules improves the integration level of the chip. The Σ-Δ ADC is mainly composed of a front-end analog Σ-Δ modulator and a back-end digital down-frequency filter, and the down-frequency filter usually adopts a digital SI...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12
Inventor 林超许肖锋
Owner 海芯科技(厦门)有限公司