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High-order synchronous integral demodulation circuit and method for gyro digital signals

An integrating circuit, digital signal technology, applied in the amplitude demodulation of homodyne/synchronization circuit, gyroscopic effect for speed measurement, gyroscope/steering sensing equipment, etc. and other problems to achieve the effect of improving noise immunity

Pending Publication Date: 2021-03-23
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Among the existing demodulation algorithms, multiplication demodulation is the most widely used, and its method is simple, but its anti-noise ability is weak, and the detection accuracy is low. High-order filters need to be configured in the circuit, which takes up more resources and is not conducive to reducing costs.

Method used

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  • High-order synchronous integral demodulation circuit and method for gyro digital signals
  • High-order synchronous integral demodulation circuit and method for gyro digital signals
  • High-order synchronous integral demodulation circuit and method for gyro digital signals

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Embodiment 1

[0030] Such as Figure 1-5 As shown, this embodiment provides a high-order synchronous integral demodulation circuit for gyroscope digital signals, including:

[0031] Signal source; the output interface is connected to the input interface of the fourth-order integration circuit through the signal source switch, and is used to output the signal to the fourth-order integration circuit;

[0032] In this embodiment, the signal modulation module is used as the signal source, and the same-frequency square wave switching signal drives the signal source switch to guide the modulation signal to the fourth-order integration circuit.

[0033] A fourth-order integration circuit, the output interface is connected to the input interface of the differential amplification module, and is used to perform fourth-order integration of the output signal of the signal source and output it to the differential amplification circuit;

[0034] There are two different integrator branches in each stage ...

Embodiment 2

[0054] Such as Figure 1-5 As shown, this embodiment provides a high-order synchronous integral demodulation method for gyroscope digital signals. The signal from the signal source is input to the fourth-order integral circuit through the signal source switch for integral operation, and the signal after the operation is input to the differential amplifier. Carry out magnification;

[0055] A square wave signal having the same frequency as the signal source of the signal source is used as the control signal of the switch of the signal source.

[0056] This embodiment specifically includes the following steps:

[0057] Step 1: The same frequency square wave switching signal leads the input modulation signal to the two integral circuits of the first-order demodulation algorithm; the input of the signal source in this step is the output signal of the gyro detection terminal, and the control signal adopts the same frequency as the signal source The switch square wave signal, wher...

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Abstract

The invention provides a high-order synchronous integral demodulation circuit for gyro digital signals. The high-order synchronous integral demodulation circuit comprises a signal source, a fourth-order integral circuit, a differential amplification module and a switch control module, wherein an output interface of the signal source is connected with an input interface of the four-order integral circuit through a signal source switch, and the signal source is used for outputting a signal to the four-order integral circuit; an output interface of the fourth-order integral circuit is connected with an input interface of the differential amplification module, and the fourth-order integral circuit is used for carrying out fourth-order integration on the output signal of the signal source and outputting the output signal to the differential amplification circuit; an input interface of the differential amplification module is connected with the output interface of the four-order integral circuit, and the differential amplification module is used for amplifying an output signal of the four-order integral circuit; and the switch control module controls the switch to switch the conduction path, and the switching frequency of the switch is the same as the output signal frequency of the signal source. Signal source noise can be suppressed, and signal information can be extracted.

Description

technical field [0001] The invention relates to the technical field of digital circuit demodulation, in particular to a high-order synchronous integral demodulation circuit and method for gyroscope digital signals. Background technique [0002] Among the existing demodulation algorithms, multiplicative demodulation is the most widely used. Its method is simple, but its anti-noise ability is weak, and the detection accuracy is low. High-order filters need to be configured in the circuit, which takes up more resources and is not conducive to reducing costs. Synchronous integral demodulation is a more preferred option in terms of noise immunity and resource occupation due to the use of R-C circuits. Contents of the invention [0003] The high-order synchronous integral demodulation circuit and method of the gyroscope digital signal provided by the invention can improve the anti-noise ability. [0004] In a first aspect, the present invention provides a high-order synchronous...

Claims

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Application Information

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IPC IPC(8): H03D1/22G01C19/00
CPCH03D1/22G01C19/00
Inventor 王盘龙钟燕清孟真张兴成田易刘谋李继秀阎跃鹏
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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