Sampling device
A technology of sampling device and sampling switch, which is applied in the direction of static memory, analog-to-digital converter, instrument, etc., can solve the problem of low linearity of sampling device and achieve the effect of improving linearity
Active Publication Date: 2016-10-26
CHONGQING GIGACHIP TECH CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The invention provides a sampling device to solve the problem of low linearity of the current sampling device
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
[0022] In order for those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above objects, features, and advantages of the embodiments of the present invention more clearly understood, the following describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings. for further details.
[0023] In the description of the present invention, unless otherwise specified and limited, it should be noted that the term "connection" should be understood in a broad sense. It is directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms can be understood according to specific situations.
[0024] see figure 1 , is a schematic circuit diagram of an embodiment of the switched capacitor circuit in the sampling device of the present invention. The sampling device may include a...
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
The present invention provides a sampling device. The sampling device includes switched capacitor circuits. According to each switched capacitor circuit, the first end of a first switch and the first end of a second switch are both connected with input signals; the second end of the first switch is connected with the upper plate of a first capacitor; the second end of the second switch is connected with the lower pole plate of a second capacitor; the connection node of the lower pole plate of the first capacitor and the upper pole plate of the second capacitor is connected with a power source; the first end of a third switch and the first end of a fourth switch are connected with input common-mode voltage; the second end of the third switch is connected with the upper pole plate of the first capacitor; the second end of the fourth switch is connected with the lower pole plate of the second capacitor; the connection node is connected with the power source through a sampling switch; and therefore, the linearity of the sampling device can be improved. According to the sampling device of the present invention, a plurality of switched capacitor circuit groups are designed; each switched capacitor circuit group includes a preset number of switched capacitor circuits; each switched capacitor circuit is connected with a corresponding power source; and the output common-mode voltage of the acquisition device is adjustable.
Description
technical field [0001] The invention belongs to the field of signal sampling, and in particular relates to a sampling device with adjustable output common mode voltage and capable of eliminating second-order nonlinearity introduced by the voltage coefficient of a sampling capacitor. Background technique [0002] With the continuous improvement of the quantization accuracy of A / D converters, the requirements for its linearity are getting higher and higher. Sampling linearity is the decisive factor for the linearity of A / D converters, and a large number of application requirements require A / D Converters have low power consumption, therefore, high linearity, low power sampling devices are required. However, the conventional sampling device usually produces second-order nonlinearity during the capacitance sampling process (ie, the sampled charge value includes a second-order term related to the input voltage), resulting in low linearity of the sampling device. SUMMARY OF THE I...
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 IPC IPC(8): H03M1/12
CPCH03M1/1245G11C27/024H03M1/0612
Inventor 李婷胡刚毅李儒章王健安张勇黄正波陈光炳王育新付东兵王妍袁浚
Owner CHONGQING GIGACHIP TECH CO LTD