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Programmable double integral type 32-bit ADC (analog-to-digital converter)

A double-integration and signal amplification technology is applied in signal transmission systems, instruments, electrical components, etc. It can solve the problems of high-precision signal detection and low resolution, and achieve high-precision physical quantity detection, convenient control, and simplified capacitance. Effect of charge and discharge control circuit

Inactive Publication Date: 2012-03-28
XUZHOU NORMAL UNIVERSITY
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  • Abstract
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Problems solved by technology

[0003] In order to overcome the deficiency that the existing ADC does not satisfy the high-precision signal detection, the present invention provides a programmable double-integral 32-bit ADC, which solves the shortcoming of the existing double-integral ADC with low resolution, and provides high precision signal measurement provides easy

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  • Programmable double integral type 32-bit ADC (analog-to-digital converter)
  • Programmable double integral type 32-bit ADC (analog-to-digital converter)
  • Programmable double integral type 32-bit ADC (analog-to-digital converter)

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Embodiment Construction

[0026] exist figure 1 Among them, the programmable double integral 32-bit ADC includes a signal amplification and processing circuit J0, a reference voltage supply circuit J1, an operational amplifier J2, a comparator J3, a microprocessor J4 and a data communication module J5.

[0027] The signal amplification and processing circuit J0 positive signal output Ui' is connected to the resistor R2, the collector of the switching transistor T is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to the "-" input terminal of the operational amplifier J2 and the Uc terminal of the integrating capacitor C , The other end of C is connected to the "-" input end of J3; the emitter of T is grounded, and the base of T is connected to the P1.0 end of microprocessor J4 through resistor R1.

[0028] The negative signal output terminal H of the signal amplification and processing circuit J0 is connected to one end of the resistor R3, and the other end o...

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Abstract

The invention relates to a programmable double integral type 32-bit ADC (analog-to-digital converter) which comprises a signal amplifying and processing circuit J0, a reference voltage supplying circuit J1, an operational amplifier J2, a comparator J3, a microprocessor J4 and a data communication module J5. Analog signals are converted into digital signals by processing data by each module. Through the programmable double integral type 32-bit ADC, the resolution of a double integral type ADC can be increased to 32 bits, thereby greatly meeting the requirement for high-precision physical quantity detection, and simultaneously simplifying the circuit structure as well as facilitating the control.

Description

technical field [0001] The invention relates to a circuit for converting analog signals into digital signals, in particular to a programmable double-integral 32-bit ADC with strong anti-interference ability and high conversion precision. Background technique [0002] At present, the known double integral ADC can only convert the rated analog quantity into 16-bit digital quantity at most, and the resolution can reach 1 / (2 16 ), which can only meet general measurement requirements; 32-bit Σ-Δ ADC is produced by TI Company, which contains PGA amplifier, which can suppress high-frequency noise and fixed low-frequency interference; other types of ADCs have a resolution lower than 24 bits. In the process of developing new products for high-resolution pressure measurement systems, the use of existing 16-bit integral ADCs cannot achieve system 1 / (10 5 ) measurement accuracy requirements, the use of 32-bit Σ-Δ type ADC has relatively poor anti-interference ability, and the price is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/50
Inventor 吕俊怀任世锦郝国生朱信诚
Owner XUZHOU NORMAL UNIVERSITY
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