Unlock instant, AI-driven research and patent intelligence for your innovation.

mos tube output current measurement circuit

A technology of MOS tube and output current, which is applied in the field of measurement circuit of MOS tube output current, can solve the problems of difficult control of precision and influence of MOS tube output current, etc., achieves the effect of easy operation, unique method, and guaranteed measurement accuracy

Active Publication Date: 2022-07-26
WUXI CRYSTAL SOURCE MICROELECTRONICS CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The smaller the resistance, the more difficult it is to control the accuracy, and because of the existence of the resistance, the output current of the MOS tube will also be affected

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • mos tube output current measurement circuit
  • mos tube output current measurement circuit
  • mos tube output current measurement circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Measuring circuit of output current of NMOS tube

[0052] like figure 1 shown, including:

[0053] A current sampling unit 101, the current sampling unit 101 is used for sampling the output current of the MOS tube to be measured, and the input end of the current sampling unit is to be the MOS tube to be measured;

[0054] a current-to-voltage conversion unit (I / V conversion unit) 102, the current-to-voltage conversion unit 102 is used for converting the sampled current into a sampled voltage, and the output end of the current sampling unit 101 is connected to the input end of the current-voltage conversion unit 102;

[0055] A comparator 103, the comparator 103 is used to compare the sampled voltage with the set reference voltage, the first input terminal and the second input terminal of the comparator 103 are respectively connected to the first output terminal of the current-voltage conversion unit 102 , a second output terminal, the first output terminal outputs the...

Embodiment 2

[0078] Measuring circuit for output current of PMOS tube

[0079] The difference between the second embodiment and the first embodiment is that the MOS transistors used in the current sampling unit and the current-voltage conversion unit are different, and the other structures and working principles are the same as those in the first embodiment.

[0080] like Figure 4 As shown, the current sampling unit includes a second PMOS transistor (MP402), a third PMOS transistor (MP403), and a second operational amplifier X401. The positive input terminal of the second PMOS tube MP402 is connected to the gate, and the source of the second PMOS tube MP402 and its substrate are connected to the power supply, and the drain is connected to the negative input terminal of the second operational amplifier X401, It is connected to the source of the third PMOS transistor MP403 and its substrate; the gate of the third PMOS transistor MP403 is connected to the output end of the second operationa...

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

No PUM Login to View More

Abstract

The invention relates to a measuring circuit for output current of a MOS tube, comprising a current sampling unit (101) for sampling the output current of a MOS tube to be measured; a current-voltage conversion unit (102) for converting the current sampling unit (101) ) outputted sampling current is converted into sampling voltage; a comparator (103) is used to compare the sampling voltage with a set reference voltage; a reference voltage adjustment unit is used to adjust the said sampling voltage according to the comparison result of the comparator (103). The reference voltage is output to the comparator (103) again for comparison, until the sampled voltage and the reference voltage are equal, the output code of the increment / decrement register (104) is determined and output; the current calculation unit is used to increment according to the / decrement the output code of the register (104) to obtain the output current value of the MOS transistor to be tested. The invention can effectively ensure the measurement accuracy.

Description

technical field [0001] The invention relates to a measuring circuit for the output current of a MOS tube. Background technique [0002] With the rapid development of microelectronics technology, MOS integrated circuits have been widely used in various consumer electronic products such as mobile phones. Current measurement technology has an extremely wide range of applications. In practical applications, it is sometimes necessary to accurately measure the output current of the circuit MOS tube. [0003] In the prior art, it is more commonly used to connect a detection resistor in series with the loop where the MOS transistor to be detected is located, and to determine the output current of the MOS transistor to be detected by the voltage across the detection resistor. In this way, as the output current of the detected MOS tube is larger, the resistance is required to be smaller. The smaller the resistance, the more difficult to control the accuracy, and because of the exis...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
CPCG01R19/00
Inventor 沈华
Owner WUXI CRYSTAL SOURCE MICROELECTRONICS CO LTD