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Voltage deviation correction device and method

A technology of voltage offset and correction device, applied in the direction of electrical components, multiple input and output pulse circuits, pulse processing, etc., can solve the problems of increasing power consumption, increasing circuit area, additional amplifiers and storage capacitors, etc., to reduce voltage Offset, the effect of reducing the voltage offset

Active Publication Date: 2016-11-09
CHINA RESOURCES MICROELECTRONICS (CHONGQING) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the commonly used comparator voltage offset correction device includes the following two forms: the first one is to use the auxiliary amplifier and storage capacitor to detect the voltage offset in a certain cycle of the frequency and put the result in the storage capacitor, and the other The detection value of the storage capacitor is used periodically to correct the voltage offset of the comparator; the disadvantage of this circuit is that an additional amplifier and storage capacitor are required, which increases the circuit area
The second is to use programmable logic units to control the internal current of the comparator circuit to improve the voltage offset problem; the biggest problem with this method is that it requires multiple sets of additional current sources, which increases power consumption

Method used

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  • Voltage deviation correction device and method
  • Voltage deviation correction device and method

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Embodiment 1

[0037] Such as figure 1 As shown, the present embodiment relates to a voltage offset correction device, which includes: a comparator or operational amplifier 106 and a step-by-step control logic module 107 connected to the comparator or operational amplifier 106, the step-by-step control logic The module 107 reduces the voltage offset of the comparator or the operational amplifier 106 by adjusting the areas of the field effect transistors at the positive and negative terminals of the comparator or the operational amplifier 106 .

[0038] In a preferred embodiment of the present invention, the above-mentioned voltage offset correction device further includes a first switching element 101, a second switching element 102, a third switching element 103, and a fourth switching element 104; between the positive input terminal of the comparator or operational amplifier 106 and the first signal input terminal INP; the second switching element 102 is arranged between the positive input...

Embodiment 2

[0045] Such as image 3 As shown, this embodiment relates to a voltage offset correction method, including the voltage offset correction device in the first embodiment above. Specifically, the method includes:

[0046] 201. Short-circuit the positive input terminal and the negative input terminal of the comparator or operational amplifier 106 .

[0047] 202, the step-by-step control logic module 107 judges whether the output voltage of the comparator or the operational amplifier 106 is a low level voltage according to the output signal of the comparator or the operational amplifier 106, if so, then enters step 203, if not, then enters step 204;

[0048] 203, the step-by-step control logic module 107 adjusts the area of ​​the field effect transistor at the positive input end of the comparator or operational amplifier 106, and then enters step 205;

[0049] 205, the step-by-step control logic module 107 determines whether the output voltage of the comparator or the operational ...

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Abstract

The invention relates to the technical field of analog circuits, in particular to a voltage deviation correction device and method. The voltage deviation correction device comprises a comparator or an operational amplifier and a progressive control logic module connected to the comparator or the operational amplifier. Through utilizing the progressive control logic module to detect the voltage deviation of the comparator or the operational amplifier and adjusting the areas of field effect transistors at the positive end and the negative end of the comparator or the operational amplifier, the voltage deviation of the comparator or the operational amplifier is reduced; and the purpose of reducing the voltage deviation of the comparator or the operational amplifier is realized without excessive additional circuits and power consumption.

Description

technical field [0001] The invention relates to the technical field of analog circuits, in particular to a voltage offset correction device and method. Background technique [0002] In the comparator, a small amount of noise may affect the circuit operation structure, and due to the mismatch of the components, the comparator will generate an offset voltage when performing the amplification operation, so it is necessary to use offset cancellation (offsetcancellation) technology to Perform compensating operations. [0003] At present, the commonly used comparator voltage offset correction device includes the following two forms: the first one is to use the auxiliary amplifier and storage capacitor to detect the voltage offset in a certain cycle of the frequency and put the result in the storage capacitor, and the other The detection value of the storage capacitor is periodically used to correct the voltage offset of the comparator; the disadvantage of this circuit is that an ...

Claims

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Application Information

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IPC IPC(8): H03K5/24
CPCH03K5/2472
Inventor 陈志昌陈政佑
Owner CHINA RESOURCES MICROELECTRONICS (CHONGQING) CO LTD
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