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Pseudo-differential analog-to-digital converter

An analog-to-digital converter and pseudo-differential technology, which is applied in the direction of analog-to-digital converter, analog-to-digital conversion, code conversion, etc., can solve the problem of narrow output range of analog-to-digital converter

Active Publication Date: 2019-10-11
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides a pseudo-differential analog-to-digital converter to solve the problem of narrow output range of the analog-to-digital converter in the prior art

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Embodiment Construction

[0025] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0026] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0027] Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another eleme...

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Abstract

The invention discloses a pseudo-differential analog-to-digital converter. The pseudo-differential analog-to-digital converter comprises a first capacitor array and a second capacitor array, which arerespectively connected to two input ends of the analog-to-digital conversion circuit; the analog-to-digital converter is characterized in that the output end of the first capacitor array and the output end of the second capacitor array respectively receive a first reference voltage and a second reference voltage, the value of the first reference voltage is between zero voltage and the peak valueof an analog input signal, and the second reference voltage is zero voltage. According to the pseudo-differential analog-to-digital converter, the structure of a circuit does not need to be changed, and the purpose of expanding the measuring range can be achieved only by changing the voltage connected to the output end of the capacitor array and setting a proper positive reference voltage value.

Description

technical field [0001] The present invention relates to a semiconductor integrated circuit, and more particularly, to a pseudo-differential analog-to-digital converter. Background technique [0002] In the prior art, in some sensor interface circuit applications, the signals to be detected by the sensor are generally single-ended signals, such as battery power and temperature. The anti-interference ability of these single-ended signals is very weak, and if the analog-to-digital converter directly samples, it will bring a certain loss of precision. [0003] Therefore, usually before the analog signal is input to the analog-to-digital converter, the single-ended signal is converted into a differential signal, that is, single-slip. But in some high-precision analog-to-digital converters, such as 16-bit or even 24-bit, it is difficult for a single-slip circuit to guarantee a large dynamic range. Therefore, in the high-precision sampling conversion circuit, the front-end single...

Claims

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Application Information

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IPC IPC(8): H03M1/46H03M1/12
CPCH03M1/466H03M1/1245H03M1/468H03M1/0682
Inventor 朱循宇金乐乐
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD